Convert some packages to nix-based

Affected packages:
- crystal
- dart
- dash
- deno
- elixir
- erlang
- gawk

.github/ISSUE_TEMPLATE/language-request.md

@@ -4,7 +4,6 @@ about: Template for requesting language support
 title: Add [insert language name here]
 labels: package
 assignees: ''
-
 ---
 
 Provide links to different compilers/interpreters that could be used to implement this language, and discuss pros/cons of each.

.github/PULL_REQUEST_TEMPLATE/package.md

@@ -1,10 +1,11 @@
 Checklist:
-* [ ] The package builds locally with `./piston build-pkg [package] [version]`
+
-* [ ] The package installs with `./piston ppman install [package]=[version]`
+-   [ ] The package builds locally with `./piston build-pkg [package] [version]`
-* [ ] The package runs the test code with `./piston run [package] -l [version] packages/[package]/[version]/test.*`
+-   [ ] The package installs with `./piston ppman install [package]=[version]`
-* [ ] Package files are placed in the correct directory
+-   [ ] The package runs the test code with `./piston run [package] -l [version] packages/[package]/[version]/test.*`
-* [ ] No old package versions are removed
+-   [ ] Package files are placed in the correct directory
-* [ ] All source files are deleted in the `build.sh` script
+-   [ ] No old package versions are removed
-* [ ] `metadata.json`'s `language` and `version` fields match the directory path
+-   [ ] All source files are deleted in the `build.sh` script
-* [ ] Any extensions the language may use are set as aliases
+-   [ ] `metadata.json`'s `language` and `version` fields match the directory path
-* [ ] Any alternative names the language is referred to are set as aliases.
+-   [ ] Any extensions the language may use are set as aliases
+-   [ ] Any alternative names the language is referred to are set as aliases.

.github/workflows/api-push.yaml

@@ -1,39 +1,38 @@
 name: Publish API image
 on:
-  push:
+    push:
-    branches:
+        branches:
-      - master
+            - master
-      - v3
+            - v3
-    paths:
+        paths:
-      - api/**
+            - api/**
 
-  
 jobs:
-  push_to_registry:
+    push_to_registry:
-    runs-on: ubuntu-latest
+        runs-on: ubuntu-latest
-    name: Build and Push Docker image to Github Packages
+        name: Build and Push Docker image to Github Packages
-    steps:
+        steps:
-      - name: Check out repo
+            - name: Check out repo
-        uses: actions/checkout@v2
+              uses: actions/checkout@v2
-      - name: Login to GitHub registry
+            - name: Login to GitHub registry
-        uses: docker/login-action@v1
+              uses: docker/login-action@v1
-        with:
+              with:
-          username: ${{ github.actor }}
+                  username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
-          registry: docker.pkg.github.com
+                  registry: docker.pkg.github.com
-      - name: Login to ghcr.io
+            - name: Login to ghcr.io
-        uses: docker/login-action@v1
+              uses: docker/login-action@v1
-        with:
+              with:
-          username: ${{ github.actor }}
+                  username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
-          registry: ghcr.io
+                  registry: ghcr.io
 
-      - name: Build and push API
+            - name: Build and push API
-        uses: docker/build-push-action@v2
+              uses: docker/build-push-action@v2
-        with:
+              with:
-          context: api
+                  context: api
-          push: true
+                  push: true
-          pull: true
+                  pull: true
-          tags: |
+                  tags: |
-            docker.pkg.github.com/engineer-man/piston/api
+                      docker.pkg.github.com/engineer-man/piston/api
-            ghcr.io/engineer-man/piston
+                      ghcr.io/engineer-man/piston

.github/workflows/package-pr.yaml

@@ -1,140 +1,139 @@
-name: "Package Pull Requests"
+name: 'Package Pull Requests'
 
 on:
-  pull_request:
+    pull_request:
-    types:
+        types:
-      - opened
+            - opened
-      - edited
+            - reopened
-      - reopened
+            - synchronize
-      - synchronize
+        paths:
-    paths:
+            - 'packages/**'
-      - "packages/**"
 
 jobs:
-  check-pkg:
+    check-pkg:
-    name: Validate README
+        name: Validate README
-    runs-on: ubuntu-latest
+        runs-on: ubuntu-latest
-    steps:
+        steps:
-      - name: Checkout
+            - name: Checkout
-        uses: actions/checkout@v2
+              uses: actions/checkout@v2
-      - name: Get list of changed files
+            - name: Get list of changed files
-        uses: lots0logs/gh-action-get-changed-files@2.1.4
+              uses: lots0logs/gh-action-get-changed-files@2.1.4
-        with:
+              with:
-          token: ${{ secrets.GITHUB_TOKEN }}
+                  token: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Ensure README was updated
+            - name: Ensure README was updated
-        run: |
+              run: |
-          MISSING_LINES=$(comm -23 <(jq 'if .provides then .provides[].language else .language end' -r $(find packages -name "metadata.json" ) | sed -e 's/^/`/g' -e 's/$/`,/g' | sort -u) <(awk '/# Supported Languages/{flag=1; next} /<br>/{flag=0} flag' readme.md | sort -u))
+                  MISSING_LINES=$(comm -23 <(jq 'if .provides then .provides[].language else .language end' -r $(find packages -name "metadata.json" ) | sed -e 's/^/`/g' -e 's/$/`,/g' | sort -u) <(awk '/# Supported Languages/{flag=1; next} /<br>/{flag=0} flag' readme.md | sort -u))
 
-          [[ $(echo $MISSING_LINES | wc -c) = "1" ]] && exit 0
+                  [[ $(echo $MISSING_LINES | wc -c) = "1" ]] && exit 0
 
-          echo "README has supported languages missing: "
+                  echo "README has supported languages missing: "
-          comm -23 <(jq 'if .provides then .provides[].language else .language end' -r $(find packages -name "metadata.json" ) | sed -e 's/^/`/g' -e 's/$/`,/g' | sort -u) <(awk '/# Supported Languages/{flag=1; next} /<br>/{flag=0} flag' readme.md | sort -u)
+                  comm -23 <(jq 'if .provides then .provides[].language else .language end' -r $(find packages -name "metadata.json" ) | sed -e 's/^/`/g' -e 's/$/`,/g' | sort -u) <(awk '/# Supported Languages/{flag=1; next} /<br>/{flag=0} flag' readme.md | sort -u)
-          exit 1
+                  exit 1
 
-  build-pkg:
+    build-pkg:
-    name: Check that package builds
+        name: Check that package builds
-    runs-on: ubuntu-latest
+        runs-on: ubuntu-latest
-    steps:
+        steps:
-      - name: Checkout
+            - name: Checkout
-        uses: actions/checkout@v2
+              uses: actions/checkout@v2
 
-      - name: Login to GitHub registry
+            - name: Login to GitHub registry
-        uses: docker/login-action@v1
+              uses: docker/login-action@v1
-        with:
+              with:
-          username: ${{ github.actor }}
+                  username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
-          registry: docker.pkg.github.com
+                  registry: docker.pkg.github.com
 
-      - name: Get list of changed files
+            - name: Get list of changed files
-        uses: lots0logs/gh-action-get-changed-files@2.1.4
+              uses: lots0logs/gh-action-get-changed-files@2.1.4
-        with:
+              with:
-          token: ${{ secrets.GITHUB_TOKEN }}
+                  token: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Build Packages
+            - name: Build Packages
-        run: |
+              run: |
-          PACKAGES=$(jq '.[]' -r ${HOME}/files.json | awk -F/ '{ print $2 "-" $3 }' | sort -u)
+                  PACKAGES=$(jq '.[]' -r ${HOME}/files*.json | awk -F/ '$1~/packages/ && $2 && $3{ print $2 "-" $3 }' | sort -u)
-          echo "Packages: $PACKAGES"
+                  echo "Packages: $PACKAGES"
-          docker pull docker.pkg.github.com/engineer-man/piston/repo-builder:latest
+                  docker pull docker.pkg.github.com/engineer-man/piston/repo-builder:latest
-          docker build -t repo-builder repo
+                  docker build -t repo-builder repo
-          docker run -v "${{ github.workspace }}:/piston" repo-builder --no-server $PACKAGES
+                  docker run -v "${{ github.workspace }}:/piston" repo-builder --no-server $PACKAGES
-          ls -la packages
+                  ls -la packages
 
-      - name: Upload package as artifact
+            - name: Upload package as artifact
-        uses: actions/upload-artifact@v2
+              uses: actions/upload-artifact@v2
-        with:
+              with:
-          name: packages
+                  name: packages
-          path: packages/*.pkg.tar.gz
+                  path: packages/*.pkg.tar.gz
 
-  test-pkg:
+    test-pkg:
-    name: Test package
+        name: Test package
-    runs-on: ubuntu-latest
+        runs-on: ubuntu-latest
-    needs: build-pkg
+        needs: build-pkg
-    steps:
+        steps:
-      - uses: actions/checkout@v2
+            - uses: actions/checkout@v2
 
-      - uses: actions/download-artifact@v2
+            - uses: actions/download-artifact@v2
-        with:
+              with:
-          name: packages
+                  name: packages
 
-      - name: Relocate downloaded packages
+            - name: Relocate downloaded packages
-        run: mv *.pkg.tar.gz packages/
+              run: mv *.pkg.tar.gz packages/
 
-      - name: Login to GitHub registry
+            - name: Login to GitHub registry
-        uses: docker/login-action@v1
+              uses: docker/login-action@v1
-        with:
+              with:
-          username: ${{ github.actor }}
+                  username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
-          registry: docker.pkg.github.com
+                  registry: docker.pkg.github.com
 
-      - name: Run tests
+            - name: Run tests
-        run: |
+              run: |
-          ls -la
+                  ls -la
-          docker run -v $(pwd)'/repo:/piston/repo' -v $(pwd)'/packages:/piston/packages' -d --name repo docker.pkg.github.com/engineer-man/piston/repo-builder --no-build
+                  docker run -v $(pwd)'/repo:/piston/repo' -v $(pwd)'/packages:/piston/packages' -d --name repo docker.pkg.github.com/engineer-man/piston/repo-builder --no-build
-          docker pull docker.pkg.github.com/engineer-man/piston/api
+                  docker pull docker.pkg.github.com/engineer-man/piston/api
-          docker build -t piston-api api
+                  docker build -t piston-api api
-          docker run --network container:repo -v $(pwd)'/data:/piston' -e PISTON_LOG_LEVEL=DEBUG -e 'PISTON_REPO_URL=http://localhost:8000/index' -d --name api piston-api
+                  docker run --network container:repo -v $(pwd)'/data:/piston' -e PISTON_LOG_LEVEL=DEBUG -e 'PISTON_REPO_URL=http://localhost:8000/index' -d --name api piston-api
-          echo Waiting for API to start..
+                  echo Waiting for API to start..
-          docker run --network container:api appropriate/curl -s --retry 10 --retry-connrefused http://localhost:2000/api/v2/runtimes
+                  docker run --network container:api appropriate/curl -s --retry 10 --retry-connrefused http://localhost:2000/api/v2/runtimes
 
-          echo Waiting for Index to start..
+                  echo Waiting for Index to start..
-          docker run --network container:repo appropriate/curl -s --retry 999 --retry-max-time 0 --retry-connrefused http://localhost:8000/index
+                  docker run --network container:repo appropriate/curl -s --retry 999 --retry-max-time 0 --retry-connrefused http://localhost:8000/index
 
-          echo Adjusting index
+                  echo Adjusting index
-          sed -i 's/repo/localhost/g' repo/index
+                  sed -i 's/repo/localhost/g' repo/index
 
-          echo Listing Packages
+                  echo Listing Packages
-          PACKAGES_JSON=$(docker run --network container:api appropriate/curl -s http://localhost:2000/api/v2/packages)
+                  PACKAGES_JSON=$(docker run --network container:api appropriate/curl -s http://localhost:2000/api/v2/packages)
-          echo $PACKAGES_JSON
+                  echo $PACKAGES_JSON
 
-          echo Getting CLI ready
+                  echo Getting CLI ready
-          docker run  -v "$PWD/cli:/app" --entrypoint /bin/bash node:15 -c 'cd /app; npm i'
+                  docker run  -v "$PWD/cli:/app" --entrypoint /bin/bash node:15 -c 'cd /app; npm i'
 
-          for package in $(jq -r '.[] | "\(.language)-\(.language_version)"' <<< "$PACKAGES_JSON")
+                  for package in $(jq -r '.[] | "\(.language)-\(.language_version)"' <<< "$PACKAGES_JSON")
-          do
+                  do
-            echo "Testing $package"
+                    echo "Testing $package"
-            PKG_PATH=$(sed 's|-|/|' <<< $package)
+                    PKG_PATH=$(sed 's|-|/|' <<< $package)
-            PKG_NAME=$(awk -F- '{ print $1 }' <<< $package)
+                    PKG_NAME=$(awk -F- '{ print $1 }' <<< $package)
-            PKG_VERSION=$(awk -F- '{ print $2 }' <<< $package)
+                    PKG_VERSION=$(awk -F- '{ print $2 }' <<< $package)
 
-            echo "Installing..."
+                    echo "Installing..."
-            docker run --network container:api appropriate/curl -sXPOST http://localhost:2000/api/v2/packages -H "Content-Type: application/json" -d "{\"language\":\"$PKG_NAME\",\"version\":\"$PKG_VERSION\"}"
+                    docker run --network container:api appropriate/curl -sXPOST http://localhost:2000/api/v2/packages -H "Content-Type: application/json" -d "{\"language\":\"$PKG_NAME\",\"version\":\"$PKG_VERSION\"}"
 
-            TEST_SCRIPTS=packages/$PKG_PATH/test.*
+                    TEST_SCRIPTS=packages/$PKG_PATH/test.*
-            echo "Tests: $TEST_SCRIPTS"
+                    echo "Tests: $TEST_SCRIPTS"
 
-            for tscript in $TEST_SCRIPTS
+                    for tscript in $TEST_SCRIPTS
-            do
+                    do
-              TEST_RUNTIME=$(awk -F. '{print $2}' <<< $(basename $tscript))
+                      TEST_RUNTIME=$(awk -F. '{print $2}' <<< $(basename $tscript))
-              echo Running $tscript with runtime=$TEST_RUNTIME
+                      echo Running $tscript with runtime=$TEST_RUNTIME
-              docker run --network container:api -v "$PWD/cli:/app" -v "$PWD/$(dirname $tscript):/pkg" node:15 /app/index.js run $TEST_RUNTIME -l $PKG_VERSION /pkg/$(basename $tscript) > test_output
+                      docker run --network container:api -v "$PWD/cli:/app" -v "$PWD/$(dirname $tscript):/pkg" node:15 /app/index.js run $TEST_RUNTIME -l $PKG_VERSION /pkg/$(basename $tscript) > test_output
-              cat test_output
+                      cat test_output
-              grep "OK" test_output
+                      grep "OK" test_output
-            done
+                    done
-          done
+                  done
 
-      - name: Dump logs
+            - name: Dump logs
-        if: ${{ always() }}
+              if: ${{ always() }}
-        run: |
+              run: |
-          docker logs api
+                  docker logs api
-          docker logs repo
+                  docker logs repo

.github/workflows/package-push.yaml

@@ -1,78 +1,77 @@
 name: 'Package Pushed'
 
 on:
-  push:
+    push:
-    branches:
+        branches:
-      - master
+            - master
-      - v3
+            - v3
-    paths:
+        paths:
-      - packages/**
+            - packages/**
-
 
 jobs:
-  build-pkg:
+    build-pkg:
-    name: Build package
+        name: Build package
-    runs-on: ubuntu-latest
+        runs-on: ubuntu-latest
-    steps:
+        steps:
-      - name: Checkout
+            - name: Checkout
-        uses: actions/checkout@v2
+              uses: actions/checkout@v2
-      
-      - name: Login to GitHub registry
-        uses: docker/login-action@v1
-        with:
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-          registry: docker.pkg.github.com
 
-      - name: Get list of changed files
+            - name: Login to GitHub registry
-        uses: lots0logs/gh-action-get-changed-files@2.1.4
+              uses: docker/login-action@v1
-        with:
+              with:
-          token: ${{ secrets.GITHUB_TOKEN }}
+                  username: ${{ github.actor }}
-                
+                  password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Build Packages
+                  registry: docker.pkg.github.com
-        run: |
-          PACKAGES=$(jq '.[]' -r ${HOME}/files.json | awk -F/ '{ print $2 "-" $3 }' | sort -u)
-          echo "Packages: $PACKAGES"
-          docker pull docker.pkg.github.com/engineer-man/piston/repo-builder:latest
-          docker build -t repo-builder repo
-          docker run -v "${{ github.workspace }}:/piston" repo-builder --no-server $PACKAGES
-          ls -la packages
 
-      - name: Upload Packages
+            - name: Get list of changed files
-        uses: svenstaro/upload-release-action@v2
+              uses: lots0logs/gh-action-get-changed-files@2.1.4
-        with:
+              with:
-          repo_token: ${{ secrets.GITHUB_TOKEN }}
+                  token: ${{ secrets.GITHUB_TOKEN }}
-          file: packages/*.pkg.tar.gz
-          tag: pkgs
-          overwrite: true
-          file_glob: true
-  create-index:
-    name: Create Index
-    runs-on: ubuntu-latest
-    needs: build-pkg
-    steps:
-      - name: "Download all release assets"
-        run: curl -s https://api.github.com/repos/engineer-man/piston/releases/latest | jq '.assets[].browser_download_url' -r | xargs -L 1 curl -sLO
-      - name: "Generate index file"
-        run: |
-          echo "" > index
-          BASEURL=https://github.com/engineer-man/piston/releases/download/pkgs/
-          for pkg in *.pkg.tar.gz
-          do
-            PKGFILE=$(basename $pkg)
-            PKGFILENAME=$(echo $PKGFILE | sed 's/\.pkg\.tar\.gz//g')
 
-            PKGNAME=$(echo $PKGFILENAME | grep -oP '^\K.+(?=-)')
+            - name: Build Packages
-            PKGVERSION=$(echo $PKGFILENAME | grep -oP '^.+-\K.+')
+              run: |
-            PKGCHECKSUM=$(sha256sum $PKGFILE | awk '{print $1}')
+                  PACKAGES=$(jq '.[]' -r ${HOME}/files*.json | awk -F/ '$1~/packages/ && $2 && $3{ print $2 "-" $3 }' | sort -u)
-            echo "$PKGNAME,$PKGVERSION,$PKGCHECKSUM,$BASEURL$PKGFILE" >> index
+                  echo "Packages: $PACKAGES"
-            echo "Adding package $PKGNAME-$PKGVERSION"
+                  docker pull docker.pkg.github.com/engineer-man/piston/repo-builder:latest
-          done
+                  docker build -t repo-builder repo
-      - name: Upload index
+                  docker run -v "${{ github.workspace }}:/piston" repo-builder --no-server $PACKAGES
-        uses: svenstaro/upload-release-action@v2
+                  ls -la packages
-        with:
+
-          repo_token: ${{ secrets.GITHUB_TOKEN }}
+            - name: Upload Packages
-          file: index
+              uses: svenstaro/upload-release-action@v2
-          tag: pkgs
+              with:
-          overwrite: true
+                  repo_token: ${{ secrets.GITHUB_TOKEN }}
-          file_glob: true
+                  file: packages/*.pkg.tar.gz
+                  tag: pkgs
+                  overwrite: true
+                  file_glob: true
+    create-index:
+        name: Create Index
+        runs-on: ubuntu-latest
+        needs: build-pkg
+        steps:
+            - name: 'Download all release assets'
+              run: curl -s https://api.github.com/repos/engineer-man/piston/releases/latest | jq '.assets[].browser_download_url' -r | xargs -L 1 curl -sLO
+            - name: 'Generate index file'
+              run: |
+                  echo "" > index
+                  BASEURL=https://github.com/engineer-man/piston/releases/download/pkgs/
+                  for pkg in *.pkg.tar.gz
+                  do
+                    PKGFILE=$(basename $pkg)
+                    PKGFILENAME=$(echo $PKGFILE | sed 's/\.pkg\.tar\.gz//g')
+
+                    PKGNAME=$(echo $PKGFILENAME | grep -oP '^\K.+(?=-)')
+                    PKGVERSION=$(echo $PKGFILENAME | grep -oP '^.+-\K.+')
+                    PKGCHECKSUM=$(sha256sum $PKGFILE | awk '{print $1}')
+                    echo "$PKGNAME,$PKGVERSION,$PKGCHECKSUM,$BASEURL$PKGFILE" >> index
+                    echo "Adding package $PKGNAME-$PKGVERSION"
+                  done
+            - name: Upload index
+              uses: svenstaro/upload-release-action@v2
+              with:
+                  repo_token: ${{ secrets.GITHUB_TOKEN }}
+                  file: index
+                  tag: pkgs
+                  overwrite: true
+                  file_glob: true

.github/workflows/repo-push.yaml

@@ -1,31 +1,31 @@
 name: Publish Repo image
 on:
-  push:
+    push:
-    branches:
+        branches:
-      - master
+            - master
-      - v3
+            - v3
-    paths:
+        paths:
-      - repo/**
+            - repo/**
-  
-jobs:
-  push_to_registry:
-    runs-on: ubuntu-latest
-    name: Build and Push Docker image to Github Packages
-    steps:
-      - name: Check out repo
-        uses: actions/checkout@v2
-      - name: Login to GitHub registry
-        uses: docker/login-action@v1
-        with:
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-          registry: docker.pkg.github.com
 
-      - name: Build and push repo
+jobs:
-        uses: docker/build-push-action@v2
+    push_to_registry:
-        with:
+        runs-on: ubuntu-latest
-          context: repo
+        name: Build and Push Docker image to Github Packages
-          pull: true
+        steps:
-          push: true
+            - name: Check out repo
-          tags: |
+              uses: actions/checkout@v2
-            docker.pkg.github.com/engineer-man/piston/repo-builder
+            - name: Login to GitHub registry
+              uses: docker/login-action@v1
+              with:
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+                  registry: docker.pkg.github.com
+
+            - name: Build and push repo
+              uses: docker/build-push-action@v2
+              with:
+                  context: repo
+                  pull: true
+                  push: true
+                  tags: |
+                      docker.pkg.github.com/engineer-man/piston/repo-builder

.gitignore

@@ -1,3 +1,4 @@
 data/
 .piston_env
-result
+node_modules
+result

.prettierignore

@@ -0,0 +1,12 @@
+node_modules
+data/
+api/_piston
+repo/build
+packages/*/*/*
+packages/*.pkg.tar.gz
+!packages/*/*/metadata.json
+!packages/*/*/build.sh
+!packages/*/*/environment
+!packages/*/*/run
+!packages/*/*/compile
+!packages/*/*/test.*

.readthedocs.yaml

@@ -1,8 +1,8 @@
 version: 2
 mkdocs:
-  configuration: mkdocs.yml
+    configuration: mkdocs.yml
 
 python:
-  version: 3.7
+    version: 3.7
-  install:
+    install:
-    - requirements: docs/requirements.txt
+        - requirements: docs/requirements.txt

Dockerfile.withset

@@ -0,0 +1,12 @@
+# This "FROM" image is previously emitted by nix
+FROM ghcr.io/engineer-man/piston:base-latest
+
+ENV PISTON_FLAKE_PATH=/piston/packages
+COPY runtimes/ /piston/packages/runtimes
+COPY flake.nix flake.lock /piston/packages/
+
+
+ARG RUNTIMESET=all
+ENV PISTON_RUNTIME_SET=$RUNTIMESET
+
+RUN piston-install

api/.gitignore

@@ -1,2 +1 @@
-node_modules
+_piston
-_piston

api/.prettierignore

@@ -1 +0,0 @@
-node_modules

api/default.nix

@@ -51,6 +51,8 @@ with pkgs; rec {
       do
         echo "nixbld$i:x:$(( $i + 30000 )):30000:Nix build user $i:/var/empty:/run/current-system/sw/bin/nologin" >> etc/passwd
       done
+
+      chmod 1777 {,var/}tmp/
     '';
 
     config = {
@@ -61,6 +63,21 @@ with pkgs; rec {
         "SSL_CERT_FILE=/etc/ssl/certs/ca-bundle.crt"
         "GIT_SSL_CAINFO=/etc/ssl/certs/ca-bundle.crt"
         "NIX_SSL_CERT_FILE=/etc/ssl/certs/ca-bundle.crt"
+         "PATH=${lib.concatStringsSep ":" [
+           "/usr/local/sbin"
+           "/usr/local/bin"
+           "/usr/sbin"
+           "/usr/bin"
+           "/sbin"
+           "/bin"
+           "/root/.nix-profile/bin"
+           "/nix/var/nix/profiles/default/bin"
+           "/nix/var/nix/profiles/default/sbin"
+         ]}"
+         "MANPATH=${lib.concatStringsSep ":" [
+           "/root/.nix-profile/share/man"
+           "/nix/var/nix/profiles/default/share/man"
+         ]}"
       ];
 
       ExposedPorts = {

api/src/api/v2.js

@@ -3,16 +3,54 @@ const router = express.Router();
 
 const events = require('events');
 
-const config = require('../config');
 const runtime = require('../runtime');
 const { Job } = require('../job');
 const logger = require('logplease').create('api/v3');
 
-const SIGNALS = ["SIGABRT","SIGALRM","SIGBUS","SIGCHLD","SIGCLD","SIGCONT","SIGEMT","SIGFPE","SIGHUP","SIGILL","SIGINFO","SIGINT","SIGIO","SIGIOT","SIGKILL","SIGLOST","SIGPIPE","SIGPOLL","SIGPROF","SIGPWR","SIGQUIT","SIGSEGV","SIGSTKFLT","SIGSTOP","SIGTSTP","SIGSYS","SIGTERM","SIGTRAP","SIGTTIN","SIGTTOU","SIGUNUSED","SIGURG","SIGUSR1","SIGUSR2","SIGVTALRM","SIGXCPU","SIGXFSZ","SIGWINCH"]
+const SIGNALS = [
+    'SIGABRT',
+    'SIGALRM',
+    'SIGBUS',
+    'SIGCHLD',
+    'SIGCLD',
+    'SIGCONT',
+    'SIGEMT',
+    'SIGFPE',
+    'SIGHUP',
+    'SIGILL',
+    'SIGINFO',
+    'SIGINT',
+    'SIGIO',
+    'SIGIOT',
+    'SIGKILL',
+    'SIGLOST',
+    'SIGPIPE',
+    'SIGPOLL',
+    'SIGPROF',
+    'SIGPWR',
+    'SIGQUIT',
+    'SIGSEGV',
+    'SIGSTKFLT',
+    'SIGSTOP',
+    'SIGTSTP',
+    'SIGSYS',
+    'SIGTERM',
+    'SIGTRAP',
+    'SIGTTIN',
+    'SIGTTOU',
+    'SIGUNUSED',
+    'SIGURG',
+    'SIGUSR1',
+    'SIGUSR2',
+    'SIGVTALRM',
+    'SIGXCPU',
+    'SIGXFSZ',
+    'SIGWINCH',
+];
 // ref: https://man7.org/linux/man-pages/man7/signal.7.html
 
-function get_job(body){
+function get_job(body) {
-    const {
+    let {
         language,
         args,
         stdin,
@@ -20,7 +58,7 @@ function get_job(body){
         compile_memory_limit,
         run_memory_limit,
         run_timeout,
-        compile_timeout
+        compile_timeout,
     } = body;
 
     return new Promise((resolve, reject) => {
@@ -35,7 +73,6 @@ function get_job(body){
                 message: 'files is required as an array',
             });
         }
-
         for (const [i, file] of files.entries()) {
             if (typeof file.content !== 'string') {
                 return reject({
@@ -94,23 +131,65 @@ function get_job(body){
             });
         }
 
-        resolve(new Job({
+        if (
-            runtime: rt,
+            rt.language !== 'file' &&
-            alias: language,
+            !files.some(file => !file.encoding || file.encoding === 'utf8')
-            args: args || [],
+        ) {
-            stdin: stdin || "",
+            return reject({
-            files,
+                message: 'files must include at least one utf8 encoded file',
-            timeouts: {
+            });
-                run: run_timeout || 3000,
+        }
-                compile: compile_timeout || 10000,
-            },
-            memory_limits: {
-                run: run_memory_limit || config.run_memory_limit,
-                compile: compile_memory_limit || config.compile_memory_limit,
-            }
-        }));
-    })
 
+        for (const constraint of ['memory_limit', 'timeout']) {
+            for (const type of ['compile', 'run']) {
+                const constraint_name = `${type}_${constraint}`;
+                const constraint_value = body[constraint_name];
+                const configured_limit = rt[`${constraint}s`][type];
+                if (!constraint_value) {
+                    continue;
+                }
+                if (typeof constraint_value !== 'number') {
+                    return reject({
+                        message: `If specified, ${constraint_name} must be a number`,
+                    });
+                }
+                if (configured_limit <= 0) {
+                    continue;
+                }
+                if (constraint_value > configured_limit) {
+                    return reject({
+                        message: `${constraint_name} cannot exceed the configured limit of ${configured_limit}`,
+                    });
+                }
+                if (constraint_value < 0) {
+                    return reject({
+                        message: `${constraint_name} must be non-negative`,
+                    });
+                }
+            }
+        }
+
+        compile_timeout = compile_timeout || rt.timeouts.compile;
+        run_timeout = run_timeout || rt.timeouts.run;
+        compile_memory_limit = compile_memory_limit || rt.memory_limits.compile;
+        run_memory_limit = run_memory_limit || rt.memory_limits.run;
+        resolve(
+            new Job({
+                runtime: rt,
+                args: args || [],
+                stdin: stdin || '',
+                files,
+                timeouts: {
+                    run: run_timeout,
+                    compile: compile_timeout,
+                },
+                memory_limits: {
+                    run: run_memory_limit,
+                    compile: compile_memory_limit,
+                },
+            })
+        );
+    });
 }
 
 router.use((req, res, next) => {
@@ -128,88 +207,104 @@ router.use((req, res, next) => {
 });
 
 router.ws('/connect', async (ws, req) => {
-
     let job = null;
     let eventBus = new events.EventEmitter();
 
-    eventBus.on("stdout", (data) => ws.send(JSON.stringify({type: "data", stream: "stdout", data: data.toString()})))
+    eventBus.on('stdout', data =>
-    eventBus.on("stderr", (data) => ws.send(JSON.stringify({type: "data", stream: "stderr", data: data.toString()})))
+        ws.send(
-    eventBus.on("stage", (stage)=> ws.send(JSON.stringify({type: "stage", stage})))
+            JSON.stringify({
-    eventBus.on("exit", (stage, status) => ws.send(JSON.stringify({type: "exit", stage, ...status})))
+                type: 'data',
+                stream: 'stdout',
+                data: data.toString(),
+            })
+        )
+    );
+    eventBus.on('stderr', data =>
+        ws.send(
+            JSON.stringify({
+                type: 'data',
+                stream: 'stderr',
+                data: data.toString(),
+            })
+        )
+    );
+    eventBus.on('stage', stage =>
+        ws.send(JSON.stringify({ type: 'stage', stage }))
+    );
+    eventBus.on('exit', (stage, status) =>
+        ws.send(JSON.stringify({ type: 'exit', stage, ...status }))
+    );
 
-    ws.on("message", async (data) => {
+    ws.on('message', async data => {
-
+        try {
-        try{
             const msg = JSON.parse(data);
 
-            switch(msg.type){
+            switch (msg.type) {
-                case "init":
+                case 'init':
-                    if(job === null){
+                    if (job === null) {
                         job = await get_job(msg);
 
                         await job.prime();
 
-                        ws.send(JSON.stringify({
+                        ws.send(
-                            type: "runtime",
+                            JSON.stringify({
-                            language: job.runtime.language,
+                                type: 'runtime',
-                            version: job.runtime.version.raw
+                                language: job.runtime.language,
-                        }))
+                                version: job.runtime.version.raw,
+                            })
+                        );
 
                         await job.execute_interactive(eventBus);
 
-                        ws.close(4999, "Job Completed");
+                        ws.close(4999, 'Job Completed');
-
+                    } else {
-                    }else{
+                        ws.close(4000, 'Already Initialized');
-                        ws.close(4000, "Already Initialized");
                     }
                     break;
-            case "data":
+                case 'data':
-                if(job !== null){
+                    if (job !== null) {
-                    if(msg.stream === "stdin"){
+                        if (msg.stream === 'stdin') {
-                        eventBus.emit("stdin", msg.data)
+                            eventBus.emit('stdin', msg.data);
-                    }else{
+                        } else {
-                        ws.close(4004, "Can only write to stdin")
+                            ws.close(4004, 'Can only write to stdin');
+                        }
+                    } else {
+                        ws.close(4003, 'Not yet initialized');
                     }
-                }else{
+                    break;
-                    ws.close(4003, "Not yet initialized")
+                case 'signal':
-                }
+                    if (job !== null) {
-                break;
+                        if (SIGNALS.includes(msg.signal)) {
-            case "signal":
+                            eventBus.emit('signal', msg.signal);
-                if(job !== null){
+                        } else {
-                    if(SIGNALS.includes(msg.signal)){
+                            ws.close(4005, 'Invalid signal');
-                        eventBus.emit("signal", msg.signal)
+                        }
-                    }else{
+                    } else {
-                        ws.close(4005, "Invalid signal")
+                        ws.close(4003, 'Not yet initialized');
                     }
-                }else{
+                    break;
-                    ws.close(4003, "Not yet initialized")
-                }
-                break;
             }
-
+        } catch (error) {
-        }catch(error){
+            ws.send(JSON.stringify({ type: 'error', message: error.message }));
-            ws.send(JSON.stringify({type: "error", message: error.message}))
+            ws.close(4002, 'Notified Error');
-            ws.close(4002, "Notified Error")
             // ws.close message is limited to 123 characters, so we notify over WS then close.
         }
-    })
+    });
 
-    ws.on("close", async ()=>{
+    ws.on('close', async () => {
-        if(job !== null){
+        if (job !== null) {
-            await job.cleanup()
+            await job.cleanup();
         }
-    })
+    });
 
-    setTimeout(()=>{
+    setTimeout(() => {
         //Terminate the socket after 1 second, if not initialized.
-        if(job === null)
+        if (job === null) ws.close(4001, 'Initialization Timeout');
-            ws.close(4001, "Initialization Timeout");
+    }, 1000);
-    }, 1000)
+});
-})
 
 router.post('/execute', async (req, res) => {
-
+    try {
-    try{
         const job = await get_job(req.body);
 
         await job.prime();
@@ -219,7 +314,7 @@ router.post('/execute', async (req, res) => {
         await job.cleanup();
 
         return res.status(200).send(result);
-    }catch(error){
+    } catch (error) {
         return res.status(400).json(error);
     }
 });

api/src/bin/pistond.js

@@ -16,8 +16,6 @@ const logger = Logger.create('pistond');
 const app = express();
 expressWs(app);
 
-
-
 (async () => {
     logger.info('Setting loglevel to', config.log_level);
     Logger.setLogLevel(config.log_level);

api/src/bin/test.js

@@ -5,108 +5,105 @@ const config = require('../config');
 const Logger = require('logplease');
 const logger = Logger.create('test');
 const cp = require('child_process');
-const runtime = require("../runtime");
+const runtime = require('../runtime');
 const { Job } = require('../job');
 
-(async function(){
+(async function () {
     logger.info('Setting loglevel to', config.log_level);
     Logger.setLogLevel(config.log_level);
 
-    
-
     let runtimes_to_test;
     let failed = false;
 
-    if(process.argv[2] === "--all"){
+    if (process.argv[2] === '--all') {
         // load all
         runtimes_to_test = JSON.parse(
-            cp.execSync(`nix eval ${config.flake_path}#pistonRuntimes --json --apply builtins.attrNames`)
+            cp.execSync(
+                `nix eval ${config.flake_path}#pistonRuntimes --json --apply builtins.attrNames`
+            )
         );
-    }else{
+    } else {
         runtimes_to_test = [process.argv[2]];
     }
-    
-
 
     for (const runtime_name of runtimes_to_test) {
-        
-        
         const runtime_path = `${config.flake_path}#pistonRuntimes.${runtime_name}`;
         logger.info(`Testing runtime ${runtime_path}`);
 
         logger.debug(`Loading runtime metadata`);
-        const metadata = JSON.parse(cp.execSync(`nix eval --json ${runtime_path}.metadata --json`));
+        const metadata = JSON.parse(
+            cp.execSync(`nix eval --json ${runtime_path}.metadata --json`)
+        );
 
         logger.debug(`Loading runtime tests`);
-        const tests = JSON.parse(cp.execSync(`nix eval --json ${runtime_path}.tests --json`));
+        const tests = JSON.parse(
+            cp.execSync(`nix eval --json ${runtime_path}.tests --json`)
+        );
 
         logger.debug(`Loading runtime`);
 
         const testable_runtime = new runtime.Runtime({
             ...metadata,
-            flake_path: runtime_path
+            ...runtime.Runtime.compute_all_limits(
+                metadata.language,
+                metadata.limitOverrides
+            ),
+            flake_path: runtime_path,
         });
 
         testable_runtime.ensure_built();
 
-
         logger.info(`Running tests`);
 
         for (const test of tests) {
-
             const files = [];
 
             for (const file_name of Object.keys(test.files)) {
                 const file_content = test.files[file_name];
                 const this_file = {
                     name: file_name,
-                    content: file_content
+                    content: file_content,
                 };
 
-                if(file_name == test.main)
+                if (file_name == test.main) files.unshift(this_file);
-                    files.unshift(this_file);
+                else files.push(this_file);
-                else
-                    files.push(this_file);
-
             }
 
-
             const job = new Job({
                 runtime: testable_runtime,
                 args: test.args || [],
-                stdin: test.stdin || "",
+                stdin: test.stdin || '',
                 files,
                 timeouts: {
                     run: 3000,
-                    compile: 10000
+                    compile: 10000,
                 },
                 memory_limits: {
                     run: config.run_memory_limit,
-                    compile: config.compile_memory_limit
+                    compile: config.compile_memory_limit,
-                }
+                },
             });
 
-            await job.prime()
+            await job.prime();
-            const result = await job.execute()
+            const result = await job.execute();
-            await job.cleanup()
+            await job.cleanup();
-            
+
-            if(result.run.stdout.trim() !== "OK"){
+            if (result.run.stdout.trim() !== 'OK') {
                 failed = true;
 
-                logger.error("Test Failed:")
+                logger.error('Test Failed:');
-                console.log(job, result)
+                console.log(job, result);
-            }else{
+            } else {
-                logger.info("Test Passed")
+                logger.info('Test Passed');
             }
         }
     }
 
-    if(failed) {
+    if (failed) {
-        logger.error("One or more tests failed")
+        logger.error('One or more tests failed');
         process.exit(1);
-    }
+    } else {
-    else {
+        logger.info('All tests passed');
-        logger.info("All tests passed")
         process.exit(0);
     }
-})()
+})();

api/src/config.js

@@ -2,6 +2,57 @@ const fss = require('fs');
 const Logger = require('logplease');
 const logger = Logger.create('config');
 
+function parse_overrides(overrides) {
+    try {
+        return JSON.parse(overrides);
+    } catch (e) {
+        return null;
+    }
+}
+
+function validate_overrides(overrides, options) {
+    for (const language in overrides) {
+        for (const key in overrides[language]) {
+            if (
+                ![
+                    'max_process_count',
+                    'max_open_files',
+                    'max_file_size',
+                    'compile_memory_limit',
+                    'run_memory_limit',
+                    'compile_timeout',
+                    'run_timeout',
+                    'output_max_size',
+                ].includes(key)
+            ) {
+                logger.error(`Invalid overridden option: ${key}`);
+                return false;
+            }
+            const option = options.find(o => o.key === key);
+            const parser = option.parser;
+            const raw = overrides[language][key];
+            const value = parser(raw);
+            const validators = option.validators;
+            for (const validator of validators) {
+                const response = validator(value, raw);
+                if (response !== true) {
+                    logger.error(
+                        `Failed to validate overridden option: ${key}`,
+                        response
+                    );
+                    return false;
+                }
+            }
+            overrides[language][key] = value;
+        }
+        // Modifies the reference
+        options[
+            options.index_of(options.find(o => o.key === 'limit_overrides'))
+        ] = overrides;
+    }
+    return true;
+}
+
 const options = [
     {
         key: 'log_level',
@@ -17,7 +68,7 @@ const options = [
     {
         key: 'bind_address',
         desc: 'Address to bind REST API on',
-        default: '0.0.0.0:2000',
+        default: `0.0.0.0:${process.env["PORT"] || 2000}`,
         validators: [],
     },
     {
@@ -91,18 +142,30 @@ const options = [
         parser: parse_int,
         validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
     },
+    {
+        key: 'compile_timeout',
+        desc: 'Max time allowed for compile stage in milliseconds',
+        default: 10000, // 10 seconds
+        parser: parse_int,
+        validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
+    },
+    {
+        key: 'run_timeout',
+        desc: 'Max time allowed for run stage in milliseconds',
+        default: 3000, // 3 seconds
+        parser: parse_int,
+        validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
+    },
     {
         key: 'compile_memory_limit',
-        desc:
+        desc: 'Max memory usage for compile stage in bytes (set to -1 for no limit)',
-            'Max memory usage for compile stage in bytes (set to -1 for no limit)',
         default: -1, // no limit
         parser: parse_int,
         validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
     },
     {
         key: 'run_memory_limit',
-        desc:
+        desc: 'Max memory usage for run stage in bytes (set to -1 for no limit)',
-            'Max memory usage for run stage in bytes (set to -1 for no limit)',
         default: -1, // no limit
         parser: parse_int,
         validators: [(x, raw) => !is_nan(x) || `${raw} is not a number`],
@@ -124,8 +187,22 @@ const options = [
         desc: 'Maximum number of concurrent jobs to run at one time',
         default: 64,
         parser: parse_int,
-        validators: [(x) => x > 0 || `${x} cannot be negative`]
+        validators: [x => x > 0 || `${x} cannot be negative`],
-    }
+    },
+    {
+        key: 'limit_overrides',
+        desc: 'Per-language exceptions in JSON format for each of:\
+        max_process_count, max_open_files, max_file_size, compile_memory_limit,\
+        run_memory_limit, compile_timeout, run_timeout, output_max_size',
+        default: {},
+        parser: parse_overrides,
+        validators: [
+            x => !!x || `Invalid JSON format for the overrides\n${x}`,
+            (overrides, _, options) =>
+                validate_overrides(overrides, options) ||
+                `Failed to validate the overrides`,
+        ],
+    },
 ];
 
 logger.info(`Loading Configuration from environment`);
@@ -143,12 +220,12 @@ options.forEach(option => {
 
     const parsed_val = parser(env_val);
 
-    const value = env_val || option.default;
+    const value = env_val === undefined ? option.default : parsed_val;
 
     option.validators.for_each(validator => {
         let response = null;
-        if (env_val) response = validator(parsed_val, env_val);
+        if (env_val) response = validator(parsed_val, env_val, options);
-        else response = validator(value, value);
+        else response = validator(value, value, options);
 
         if (response !== true) {
             errored = true;

api/src/job.js

@@ -1,10 +1,12 @@
-const logger = require('logplease').create('job');
+const logplease = require('logplease');
+const logger = logplease.create('job');
 const { v4: uuidv4 } = require('uuid');
 const cp = require('child_process');
 const path = require('path');
 const config = require('./config');
 const globals = require('./globals');
 const fs = require('fs/promises');
+const fss = require('fs');
 const wait_pid = require('waitpid');
 
 const job_states = {
@@ -16,30 +18,34 @@ const job_states = {
 let uid = 0;
 let gid = 0;
 
-let remainingJobSpaces = config.max_concurrent_jobs;
+let remaining_job_spaces = config.max_concurrent_jobs;
 let jobQueue = [];
 
-
+setInterval(() => {
-setInterval(()=>{
     // Every 10ms try resolve a new job, if there is an available slot
-    if(jobQueue.length > 0 && remainingJobSpaces > 0){
+    if (jobQueue.length > 0 && remaining_job_spaces > 0) {
-        jobQueue.shift()()
+        jobQueue.shift()();
     }
-}, 10)
+}, 10);
-
-
 
 class Job {
     constructor({ runtime, files, args, stdin, timeouts, memory_limits }) {
         this.uuid = uuidv4();
+
+        this.logger = logplease.create(`job/${this.uuid}`);
+
         this.runtime = runtime;
         this.files = files.map((file, i) => ({
             name: file.name || `file${i}.code`,
             content: file.content,
+            encoding: ['base64', 'hex', 'utf8'].includes(file.encoding)
+                ? file.encoding
+                : 'utf8',
         }));
 
         this.args = args;
         this.stdin = stdin;
+
         this.timeouts = timeouts;
         this.memory_limits = memory_limits;
 
@@ -52,6 +58,8 @@ class Job {
         uid %= config.runner_uid_max - config.runner_uid_min + 1;
         gid %= config.runner_gid_max - config.runner_gid_min + 1;
 
+        this.logger.debug(`Assigned uid=${this.uid} gid=${this.gid}`);
+
         this.state = job_states.READY;
         this.dir = path.join(
             config.data_directory,
@@ -61,39 +69,45 @@ class Job {
     }
 
     async prime() {
-        if(remainingJobSpaces < 1){
+        if (remaining_job_spaces < 1) {
-            logger.info(`Awaiting job slot uuid=${this.uuid}`)
+            this.logger.info(`Awaiting job slot`);
-            await new Promise((resolve)=>{
+            await new Promise(resolve => {
-                jobQueue.push(resolve)
+                jobQueue.push(resolve);
-            })
+            });
         }
 
-        logger.info(`Priming job uuid=${this.uuid}`);
+        this.logger.info(`Priming job`);
-        remainingJobSpaces--;
+        remaining_job_spaces--;
-        logger.debug('Writing files to job cache');
+        this.logger.debug('Writing files to job cache');
 
-        logger.debug(`Transfering ownership uid=${this.uid} gid=${this.gid}`);
+        this.logger.debug(`Transfering ownership`);
 
         await fs.mkdir(this.dir, { mode: 0o700 });
         await fs.chown(this.dir, this.uid, this.gid);
 
         for (const file of this.files) {
-            let file_path = path.join(this.dir, file.name);
+            const file_path = path.join(this.dir, file.name);
             const rel = path.relative(this.dir, file_path);
+            const file_content = Buffer.from(file.content, file.encoding);
 
-            if(rel.startsWith(".."))
+            if (rel.startsWith('..'))
-                throw Error(`File path "${file.name}" tries to escape parent directory: ${rel}`)
+                throw Error(
+                    `File path "${file.name}" tries to escape parent directory: ${rel}`
+                );
 
-            await fs.mkdir(path.dirname(file_path), {recursive: true,  mode: 0o700})
+            await fs.mkdir(path.dirname(file_path), {
+                recursive: true,
+                mode: 0o700,
+            });
             await fs.chown(path.dirname(file_path), this.uid, this.gid);
 
-            await fs.write_file(file_path, file.content);
+            await fs.write_file(file_path, file_content);
             await fs.chown(file_path, this.uid, this.gid);
         }
 
         this.state = job_states.PRIMED;
 
-        logger.debug('Primed job');
+        this.logger.debug('Primed job');
     }
 
     async safe_call(file, args, timeout, memory_limit, eventBus = null) {
@@ -102,26 +116,29 @@ class Job {
 
             const prlimit = [
                 'prlimit',
-                '--nproc=' + config.max_process_count,
+                '--nproc=' + this.runtime.max_process_count,
-                '--nofile=' + config.max_open_files,
+                '--nofile=' + this.runtime.max_open_files,
-                '--fsize=' + config.max_file_size,
+                '--fsize=' + this.runtime.max_file_size,
             ];
 
             if (memory_limit >= 0) {
                 prlimit.push('--as=' + memory_limit);
             }
 
-            const proc_call = [...prlimit, ...nonetwork, 'bash', file, ...args];
+            const proc_call = [
+                'nice',
+                ...prlimit,
+                ...nonetwork,
+                'bash',
+                file,
+                ...args,
+            ];
 
             var stdout = '';
             var stderr = '';
             var output = '';
 
             const proc = cp.spawn(proc_call[0], proc_call.splice(1), {
-                env: {
-                    ...this.runtime.env_vars,
-                    PISTON_LANGUAGE: this.runtime.language,
-                },
                 stdio: 'pipe',
                 cwd: this.dir,
                 uid: this.uid,
@@ -129,36 +146,34 @@ class Job {
                 detached: true, //give this process its own process group
             });
 
-            if(eventBus === null){
+            if (eventBus === null) {
                 proc.stdin.write(this.stdin);
                 proc.stdin.end();
                 proc.stdin.destroy();
-            }else{
+            } else {
-                eventBus.on("stdin", (data) => {
+                eventBus.on('stdin', data => {
                     proc.stdin.write(data);
-                })
+                });
 
-                eventBus.on("kill", (signal) => {
+                eventBus.on('kill', signal => {
-                    proc.kill(signal)
+                    proc.kill(signal);
-                })
+                });
             }
-            
-            
 
-            const kill_timeout = set_timeout(
+            const kill_timeout =
-                async _ => {
+                (timeout >= 0 &&
-                    logger.info(`Timeout exceeded timeout=${timeout} uuid=${this.uuid}`)
+                    set_timeout(async _ => {
-                    process.kill(proc.pid, 'SIGKILL')
+                        this.logger.info(`Timeout exceeded timeout=${timeout}`);
-                },
+                        process.kill(proc.pid, 'SIGKILL');
-                timeout
+                    }, timeout)) ||
-            );
+                null;
 
             proc.stderr.on('data', async data => {
-                if(eventBus !== null) {
+                if (eventBus !== null) {
-                    eventBus.emit("stderr", data);
+                    eventBus.emit('stderr', data);
-                } else if (stderr.length > config.output_max_size) {
+                } else if (stderr.length > this.runtime.output_max_size) {
-                    logger.info(`stderr length exceeded uuid=${this.uuid}`)
+                    this.logger.info(`stderr length exceeded`);
-                    process.kill(proc.pid, 'SIGKILL')
+                    process.kill(proc.pid, 'SIGKILL');
                 } else {
                     stderr += data;
                     output += data;
@@ -166,35 +181,35 @@ class Job {
             });
 
             proc.stdout.on('data', async data => {
-                if(eventBus !== null){
+                if (eventBus !== null) {
-                    eventBus.emit("stdout", data);
+                    eventBus.emit('stdout', data);
-                } else if (stdout.length > config.output_max_size) {
+                } else if (stdout.length > this.runtime.output_max_size) {
-                    logger.info(`stdout length exceeded uuid=${this.uuid}`)
+                    this.logger.info(`stdout length exceeded`);
-                    process.kill(proc.pid, 'SIGKILL')
+                    process.kill(proc.pid, 'SIGKILL');
                 } else {
                     stdout += data;
                     output += data;
                 }
             });
 
-            const exit_cleanup = async () => {
+            const exit_cleanup = () => {
                 clear_timeout(kill_timeout);
 
                 proc.stderr.destroy();
                 proc.stdout.destroy();
 
-                await this.cleanup_processes()
+                this.cleanup_processes();
-                logger.debug(`Finished exit cleanup uuid=${this.uuid}`)
+                this.logger.debug(`Finished exit cleanup`);
             };
 
-            proc.on('exit', async (code, signal) => {
+            proc.on('exit', (code, signal) => {
-                await exit_cleanup();
+                exit_cleanup();
 
-                resolve({stdout, stderr, code, signal, output });
+                resolve({ stdout, stderr, code, signal, output });
             });
 
-            proc.on('error', async err => {
+            proc.on('error', err => {
-                await exit_cleanup();
+                exit_cleanup();
 
                 reject({ error: err, stdout, stderr, output });
             });
@@ -209,13 +224,13 @@ class Job {
             );
         }
 
-        logger.info(
+        this.logger.info(`Executing job runtime=${this.runtime.toString()}`);
-            `Executing job uuid=${this.uuid} uid=${this.uid} gid=${
-                this.gid
-            } runtime=${this.runtime.toString()}`
-        );
 
-        logger.debug('Compiling');
+        const code_files =
+            (this.runtime.language === 'file' && this.files) ||
+            this.files.filter(file => file.encoding == 'utf8');
+
+        this.logger.debug('Compiling');
 
         let compile;
 
@@ -228,11 +243,11 @@ class Job {
             );
         }
 
-        logger.debug('Running');
+        this.logger.debug('Running');
 
         const run = await this.safe_call(
             this.runtime.run,
-            [this.files[0].name, ...this.args],
+            [code_files[0].name, ...this.args],
             this.timeouts.run,
             this.memory_limits.run
         );
@@ -247,7 +262,7 @@ class Job {
         };
     }
 
-    async execute_interactive(eventBus){
+    async execute_interactive(eventBus) {
         if (this.state !== job_states.PRIMED) {
             throw new Error(
                 'Job must be in primed state, current state: ' +
@@ -255,84 +270,98 @@ class Job {
             );
         }
 
-        logger.info(
+        this.logger.info(
-            `Interactively executing job uuid=${this.uuid} uid=${this.uid} gid=${
+            `Interactively executing job runtime=${this.runtime.toString()}`
-                this.gid
-            } runtime=${this.runtime.toString()}`
         );
 
-        if(this.runtime.compiled){
+        const code_files =
-            eventBus.emit("stage", "compile")
+            (this.runtime.language === 'file' && this.files) ||
-            const {error, code, signal} = await this.safe_call(
+            this.files.filter(file => file.encoding == 'utf8');
-                this.runtime.compile,
+
-                this.files.map(x => x.name),
+        if (this.runtime.compiled) {
+            eventBus.emit('stage', 'compile');
+            const { error, code, signal } = await this.safe_call(
+                path.join(this.runtime.pkgdir, 'compile'),
+                code_files.map(x => x.name),
                 this.timeouts.compile,
                 this.memory_limits.compile,
                 eventBus
-            )
+            );
 
-            eventBus.emit("exit", "compile", {error, code, signal})
+            eventBus.emit('exit', 'compile', { error, code, signal });
         }
 
-        logger.debug('Running');
+        this.logger.debug('Running');
-        eventBus.emit("stage", "run")
+        eventBus.emit('stage', 'run');
-        const {error, code, signal} = await this.safe_call(
+        const { error, code, signal } = await this.safe_call(
-            this.runtime.run,
+            path.join(this.runtime.pkgdir, 'run'),
-            [this.files[0].name, ...this.args],
+            [code_files[0].name, ...this.args],
             this.timeouts.run,
             this.memory_limits.run,
             eventBus
         );
 
-        eventBus.emit("exit", "run", {error, code, signal})
+        eventBus.emit('exit', 'run', { error, code, signal });
 
-        
         this.state = job_states.EXECUTED;
     }
 
-    async cleanup_processes(dont_wait = []) {
+    cleanup_processes(dont_wait = []) {
         let processes = [1];
-        logger.debug(`Cleaning up processes uuid=${this.uuid}`)
+        const to_wait = [];
+        this.logger.debug(`Cleaning up processes`);
 
         while (processes.length > 0) {
-            processes = []
+            processes = [];
 
+            const proc_ids = fss.readdir_sync('/proc');
 
-            const proc_ids = await fs.readdir("/proc");
+            processes = proc_ids.map(proc_id => {
-
+                if (isNaN(proc_id)) return -1;
-
+                try {
-            processes = await Promise.all(proc_ids.map(async (proc_id) => {
+                    const proc_status = fss.read_file_sync(
-                if(isNaN(proc_id)) return -1;
+                        path.join('/proc', proc_id, 'status')
-                try{
+                    );
-                    const proc_status = await fs.read_file(path.join("/proc",proc_id,"status"));
+                    const proc_lines = proc_status.to_string().split('\n');
-                    const proc_lines = proc_status.to_string().split("\n")
+                    const state_line = proc_lines.find(line =>
-                    const uid_line = proc_lines.find(line=>line.starts_with("Uid:"))
+                        line.starts_with('State:')
+                    );
+                    const uid_line = proc_lines.find(line =>
+                        line.starts_with('Uid:')
+                    );
                     const [_, ruid, euid, suid, fuid] = uid_line.split(/\s+/);
-                    
-                    
-                    if(ruid == this.uid || euid == this.uid)
-                        return parse_int(proc_id)
 
-                }catch{
+                    const [_1, state, user_friendly] = state_line.split(/\s+/);
-                    return -1
+
+                    if (state == 'Z')
+                        // Zombie process, just needs to be waited
+                        return -1;
+                    // We should kill in all other state (Sleep, Stopped & Running)
+
+                    if (ruid == this.uid || euid == this.uid)
+                        return parse_int(proc_id);
+                } catch {
+                    return -1;
                 }
 
-                return -1
+                return -1;
-            }))
+            });
-
-            processes = processes.filter(p => p > 0)
-
-            if(processes.length > 0)
-                logger.debug(`Got processes to kill: ${processes} uuid=${this.uuid}`)
 
+            processes = processes.filter(p => p > 0);
 
+            if (processes.length > 0)
+                this.logger.debug(`Got processes to kill: ${processes}`);
 
             for (const proc of processes) {
                 // First stop the processes, but keep their resources allocated so they cant re-fork
                 try {
                     process.kill(proc, 'SIGSTOP');
-                } catch {
+                } catch (e) {
                     // Could already be dead
+                    this.logger.debug(
+                        `Got error while SIGSTOPping process ${proc}:`,
+                        e
+                    );
                 }
             }
 
@@ -342,14 +371,27 @@ class Job {
                     process.kill(proc, 'SIGKILL');
                 } catch {
                     // Could already be dead and just needs to be waited on
+                    this.logger.debug(
+                        `Got error while SIGKILLing process ${proc}:`,
+                        e
+                    );
                 }
 
-                if(!dont_wait.includes(proc))
+                to_wait.push(proc);
-                    wait_pid(proc);
             }
         }
 
-        logger.debug(`Cleaned up processes uuid=${this.uuid}`)
+        this.logger.debug(
+            `Finished kill-loop, calling wait_pid to end any zombie processes`
+        );
+
+        for (const proc of to_wait) {
+            if (dont_wait.includes(proc)) continue;
+
+            wait_pid(proc);
+        }
+
+        this.logger.debug(`Cleaned up processes`);
     }
 
     async cleanup_filesystem() {
@@ -370,7 +412,7 @@ class Job {
                     }
                 } catch (e) {
                     // File was somehow deleted in the time that we read the dir to when we checked the file
-                    logger.warn(`Error removing file ${file_path}: ${e}`);
+                    this.logger.warn(`Error removing file ${file_path}: ${e}`);
                 }
             }
         }
@@ -379,15 +421,15 @@ class Job {
     }
 
     async cleanup() {
-        logger.info(`Cleaning up job uuid=${this.uuid}`);
+        this.logger.info(`Cleaning up job`);
 
+        this.cleanup_processes(); // Run process janitor, just incase there are any residual processes somehow
         await this.cleanup_filesystem();
 
-        remainingJobSpaces++;
+        remaining_job_spaces++;
     }
 }
 
-
 module.exports = {
     Job,
 };

api/src/runtime.js

@@ -7,14 +7,36 @@ const path = require('path');
 
 const runtimes = [];
 
-
 class Runtime {
-    constructor({ language, version, aliases, runtime, run, compile, packageSupport, flake_path }) {
+    constructor({
+        language,
+        version,
+        aliases,
+        runtime,
+        run,
+        compile,
+        packageSupport,
+        flake_path,
+        timeouts,
+        memory_limits,
+        max_process_count,
+        max_open_files,
+        max_file_size,
+        output_max_size,
+    }) {
         this.language = language;
         this.runtime = runtime;
+
+        this.timeouts = timeouts;
+        this.memory_limits = memory_limits;
+        this.max_process_count = max_process_count;
+        this.max_open_files = max_open_files;
+        this.max_file_size = max_file_size;
+        this.output_max_size = output_max_size;
+
         this.aliases = aliases;
-        this.version = version; 
+        this.version = version;
-        
+
         this.run = run;
         this.compile = compile;
 
@@ -22,58 +44,120 @@ class Runtime {
         this.package_support = packageSupport;
     }
 
-    ensure_built(){
+    static compute_single_limit(
+        language_name,
+        limit_name,
+        language_limit_overrides
+    ) {
+        return (
+            (config.limit_overrides[language_name] &&
+                config.limit_overrides[language_name][limit_name]) ||
+            (language_limit_overrides &&
+                language_limit_overrides[limit_name]) ||
+            config[limit_name]
+        );
+    }
+
+    static compute_all_limits(language_name, language_limit_overrides) {
+        return {
+            timeouts: {
+                compile: this.compute_single_limit(
+                    language_name,
+                    'compile_timeout',
+                    language_limit_overrides
+                ),
+                run: this.compute_single_limit(
+                    language_name,
+                    'run_timeout',
+                    language_limit_overrides
+                ),
+            },
+            memory_limits: {
+                compile: this.compute_single_limit(
+                    language_name,
+                    'compile_memory_limit',
+                    language_limit_overrides
+                ),
+                run: this.compute_single_limit(
+                    language_name,
+                    'run_memory_limit',
+                    language_limit_overrides
+                ),
+            },
+            max_process_count: this.compute_single_limit(
+                language_name,
+                'max_process_count',
+                language_limit_overrides
+            ),
+            max_open_files: this.compute_single_limit(
+                language_name,
+                'max_open_files',
+                language_limit_overrides
+            ),
+            max_file_size: this.compute_single_limit(
+                language_name,
+                'max_file_size',
+                language_limit_overrides
+            ),
+            output_max_size: this.compute_single_limit(
+                language_name,
+                'output_max_size',
+                language_limit_overrides
+            ),
+        };
+    }
+
+    ensure_built() {
         logger.info(`Ensuring ${this} is built`);
 
         const flake_path = this.flake_path;
 
-        function _ensure_built(key){
+        function _ensure_built(key) {
             const command = `nix build ${flake_path}.metadata.${key} --no-link`;
-            cp.execSync(command, {stdio: "pipe"})
+            cp.execSync(command, { stdio: 'pipe' });
         }
 
-        _ensure_built("run");
+        _ensure_built('run');
-        if(this.compiled) _ensure_built("compile");
+        if (this.compiled) _ensure_built('compile');
-
-        logger.debug(`Finished ensuring ${this} is installed`)
 
+        logger.debug(`Finished ensuring ${this} is installed`);
     }
 
-    static load_runtime(flake_key){
+    static load_runtime(flake_key) {
-        logger.info(`Loading ${flake_key}`)
+        logger.info(`Loading ${flake_key}`);
         const flake_path = `${config.flake_path}#pistonRuntimeSets.${config.runtime_set}.${flake_key}`;
         const metadata_command = `nix eval --json ${flake_path}.metadata`;
         const metadata = JSON.parse(cp.execSync(metadata_command));
-        
+
         const this_runtime = new Runtime({
             ...metadata,
-            flake_path
+            ...Runtime.compute_all_limits(
+                metadata.language,
+                metadata.limitOverrides
+            ),
+            flake_path,
         });
 
         this_runtime.ensure_built();
 
         runtimes.push(this_runtime);
-        
-        
-        logger.debug(`Package ${flake_key} was loaded`);
 
+        logger.debug(`Package ${flake_key} was loaded`);
     }
 
     get compiled() {
         return this.compile !== null;
     }
 
-    get id(){
+    get id() {
         return runtimes.indexOf(this);
     }
 
     toString() {
         return `${this.language}-${this.version}`;
     }
-
 }
 
 module.exports = runtimes;
 module.exports.Runtime = Runtime;
 module.exports.load_runtime = Runtime.load_runtime;
-

cli/.gitignore

@@ -1 +0,0 @@
-node_modules

cli/commands/execute.js

@@ -3,8 +3,44 @@ const path = require('path');
 const chalk = require('chalk');
 const WebSocket = require('ws');
 
-const SIGNALS = ["SIGABRT","SIGALRM","SIGBUS","SIGCHLD","SIGCLD","SIGCONT","SIGEMT","SIGFPE","SIGHUP","SIGILL","SIGINFO","SIGINT","SIGIO","SIGIOT","SIGLOST","SIGPIPE","SIGPOLL","SIGPROF","SIGPWR","SIGQUIT","SIGSEGV","SIGSTKFLT","SIGTSTP","SIGSYS","SIGTERM","SIGTRAP","SIGTTIN","SIGTTOU","SIGUNUSED","SIGURG","SIGUSR1","SIGUSR2","SIGVTALRM","SIGXCPU","SIGXFSZ","SIGWINCH"]
+const SIGNALS = [
-
+    'SIGABRT',
+    'SIGALRM',
+    'SIGBUS',
+    'SIGCHLD',
+    'SIGCLD',
+    'SIGCONT',
+    'SIGEMT',
+    'SIGFPE',
+    'SIGHUP',
+    'SIGILL',
+    'SIGINFO',
+    'SIGINT',
+    'SIGIO',
+    'SIGIOT',
+    'SIGLOST',
+    'SIGPIPE',
+    'SIGPOLL',
+    'SIGPROF',
+    'SIGPWR',
+    'SIGQUIT',
+    'SIGSEGV',
+    'SIGSTKFLT',
+    'SIGTSTP',
+    'SIGSYS',
+    'SIGTERM',
+    'SIGTRAP',
+    'SIGTTIN',
+    'SIGTTOU',
+    'SIGUNUSED',
+    'SIGURG',
+    'SIGUSR1',
+    'SIGUSR2',
+    'SIGVTALRM',
+    'SIGXCPU',
+    'SIGXFSZ',
+    'SIGWINCH',
+];
 
 exports.command = ['execute <language> <file> [args..]'];
 exports.aliases = ['run'];
@@ -15,18 +51,18 @@ exports.builder = {
         string: true,
         desc: 'Set the version of the language to use',
         alias: ['l'],
-        default: '*'
+        default: '*',
     },
     stdin: {
         boolean: true,
         desc: 'Read input from stdin and pass to executor',
-        alias: ['i']
+        alias: ['i'],
     },
     run_timeout: {
         alias: ['rt', 'r'],
         number: true,
         desc: 'Milliseconds before killing run process',
-        default: 3000
+        default: 3000,
     },
     compile_timeout: {
         alias: ['ct', 'c'],
@@ -42,117 +78,126 @@ exports.builder = {
     interactive: {
         boolean: true,
         alias: ['t'],
-        desc: 'Run interactively using WebSocket transport'
+        desc: 'Run interactively using WebSocket transport',
     },
     status: {
         boolean: true,
         alias: ['s'],
-        desc: 'Output additional status to stderr'
+        desc: 'Output additional status to stderr',
-    }
+    },
 };
 
-async function handle_interactive(files, argv){
+async function handle_interactive(files, argv) {
-    const ws = new WebSocket(argv.pistonUrl.replace("http", "ws") + "/api/v2/connect")
+    const ws = new WebSocket(
+        argv.pistonUrl.replace('http', 'ws') + '/api/v2/connect'
+    );
 
-    const log_message = (process.stderr.isTTY && argv.status) ? console.error : ()=>{};
+    const log_message =
+        process.stderr.isTTY && argv.status ? console.error : () => {};
 
-    process.on("exit", ()=>{
+    process.on('exit', () => {
         ws.close();
         process.stdin.end();
         process.stdin.destroy();
-        process.exit();        
+        process.exit();
-    })
+    });
 
-    for(const signal of SIGNALS){
+    for (const signal of SIGNALS) {
-        process.on(signal, ()=>{
+        process.on(signal, () => {
-            ws.send(JSON.stringify({type: 'signal', signal}))
+            ws.send(JSON.stringify({ type: 'signal', signal }));
-        }) 
+        });
     }
 
-    
+    ws.on('open', () => {
-
-    ws.on('open', ()=>{
         const request = {
-            type: "init",
+            type: 'init',
             language: argv.language,
             version: argv['language_version'],
             files: files,
             args: argv.args,
             compile_timeout: argv.ct,
-            run_timeout: argv.rt
+            run_timeout: argv.rt,
-        }
+        };
 
-        ws.send(JSON.stringify(request))
+        ws.send(JSON.stringify(request));
-        log_message(chalk.white.bold("Connected"))
+        log_message(chalk.white.bold('Connected'));
 
         process.stdin.resume();
 
-        process.stdin.on("data", (data) => {
+        process.stdin.on('data', data => {
-            ws.send(JSON.stringify({
+            ws.send(
-                type: "data",
+                JSON.stringify({
-                stream: "stdin",
+                    type: 'data',
-                data: data.toString()
+                    stream: 'stdin',
-            }))
+                    data: data.toString(),
-        })
+                })
-    })
+            );
+        });
+    });
 
-    ws.on("close", (code, reason)=>{
+    ws.on('close', (code, reason) => {
         log_message(
-            chalk.white.bold("Disconnected: "),
+            chalk.white.bold('Disconnected: '),
-            chalk.white.bold("Reason: "),
+            chalk.white.bold('Reason: '),
             chalk.yellow(`"${reason}"`),
-            chalk.white.bold("Code: "),
+            chalk.white.bold('Code: '),
-            chalk.yellow(`"${code}"`),
+            chalk.yellow(`"${code}"`)
-            )
+        );
-        process.stdin.pause()
+        process.stdin.pause();
-    })
+    });
 
-    ws.on('message', function(data){
+    ws.on('message', function (data) {
         const msg = JSON.parse(data);
-        
+
-        switch(msg.type){
+        switch (msg.type) {
-            case "runtime":
+            case 'runtime':
-                log_message(chalk.bold.white("Runtime:"), chalk.yellow(`${msg.language} ${msg.version}`))
+                log_message(
+                    chalk.bold.white('Runtime:'),
+                    chalk.yellow(`${msg.language} ${msg.version}`)
+                );
                 break;
-            case "stage":
+            case 'stage':
-                log_message(chalk.bold.white("Stage:"), chalk.yellow(msg.stage))
+                log_message(
+                    chalk.bold.white('Stage:'),
+                    chalk.yellow(msg.stage)
+                );
                 break;
-            case "data":
+            case 'data':
-                if(msg.stream == "stdout") process.stdout.write(msg.data)
+                if (msg.stream == 'stdout') process.stdout.write(msg.data);
-                else if(msg.stream == "stderr") process.stderr.write(msg.data)
+                else if (msg.stream == 'stderr') process.stderr.write(msg.data);
-                else log_message(chalk.bold.red(`(${msg.stream}) `), msg.data)
+                else log_message(chalk.bold.red(`(${msg.stream}) `), msg.data);
                 break;
-            case "exit":
+            case 'exit':
-                if(msg.signal === null)
+                if (msg.signal === null)
                     log_message(
-                        chalk.white.bold("Stage"),
+                        chalk.white.bold('Stage'),
                         chalk.yellow(msg.stage),
-                        chalk.white.bold("exited with code"),
+                        chalk.white.bold('exited with code'),
                         chalk.yellow(msg.code)
-                    )
+                    );
                 else
                     log_message(
-                        chalk.white.bold("Stage"),
+                        chalk.white.bold('Stage'),
                         chalk.yellow(msg.stage),
-                        chalk.white.bold("exited with signal"),
+                        chalk.white.bold('exited with signal'),
                         chalk.yellow(msg.signal)
-                    )
+                    );
-                    break;
+                break;
             default:
-                log_message(chalk.red.bold("Unknown message:"), msg)
+                log_message(chalk.red.bold('Unknown message:'), msg);
         }
-    })
+    });
-
 }
 
 async function run_non_interactively(files, argv) {
-    
+    const stdin =
-
+        (argv.stdin &&
-    const stdin = (argv.stdin && await new Promise((resolve, _) => {
+            (await new Promise((resolve, _) => {
-        let data = '';
+                let data = '';
-        process.stdin.on('data', d => data += d);
+                process.stdin.on('data', d => (data += d));
-        process.stdin.on('end', _ => resolve(data));
+                process.stdin.on('end', _ => resolve(data));
-    })) || '';
+            }))) ||
+        '';
 
     const request = {
         language: argv.language,
@@ -161,7 +206,7 @@ async function run_non_interactively(files, argv) {
         args: argv.args,
         stdin,
         compile_timeout: argv.ct,
-        run_timeout: argv.rt
+        run_timeout: argv.rt,
     };
 
     let { data: response } = await argv.axios.post('/api/v2/execute', request);
@@ -170,13 +215,13 @@ async function run_non_interactively(files, argv) {
         console.log(chalk.bold(`== ${name} ==`));
 
         if (ctx.stdout) {
-            console.log(chalk.bold(`STDOUT`))
+            console.log(chalk.bold(`STDOUT`));
-            console.log(ctx.stdout.replace(/\n/g,'\n    '))
+            console.log(ctx.stdout.replace(/\n/g, '\n    '));
         }
 
         if (ctx.stderr) {
-            console.log(chalk.bold(`STDERR`))
+            console.log(chalk.bold(`STDERR`));
-            console.log(ctx.stderr.replace(/\n/g,'\n    '))
+            console.log(ctx.stderr.replace(/\n/g, '\n    '));
         }
 
         if (ctx.code) {
@@ -187,12 +232,9 @@ async function run_non_interactively(files, argv) {
         }
 
         if (ctx.signal) {
-            console.log(
+            console.log(chalk.bold(`Signal:`), chalk.bold.yellow(ctx.signal));
-                chalk.bold(`Signal:`),
-                chalk.bold.yellow(ctx.signal)
-            );
         }
-    }
+    };
 
     if (response.compile) {
         step('Compile', response.compile);
@@ -201,17 +243,23 @@ async function run_non_interactively(files, argv) {
     step('Run', response.run);
 }
 
-exports.handler = async (argv) => {
+exports.handler = async argv => {
-    const files = [...(argv.files || []),argv.file]
+    const files = [...(argv.files || []), argv.file].map(file_path => {
-        .map(file_path => {
+        const buffer = fs.readFileSync(file_path);
-            return {
+        const encoding =
-                name: path.basename(file_path),
+            (buffer
-                content: fs.readFileSync(file_path).toString()
+                .toString()
-            };
+                .split('')
-        });
+                .some(x => x.charCodeAt(0) >= 128) &&
+                'base64') ||
+            'utf8';
+        return {
+            name: path.basename(file_path),
+            content: buffer.toString(encoding),
+            encoding,
+        };
+    });
 
-    if(argv.interactive) await handle_interactive(files, argv);
+    if (argv.interactive) await handle_interactive(files, argv);
     else await run_non_interactively(files, argv);
-}
+};
-
-

cli/index.js

@@ -6,8 +6,8 @@ const axios_instance = argv => {
     argv.axios = axios.create({
         baseURL: argv['piston-url'],
         headers: {
-            'Content-Type': 'application/json'
+            'Content-Type': 'application/json',
-        }
+        },
     });
 
     return argv;
@@ -18,12 +18,11 @@ require('yargs')(process.argv.slice(2))
         alias: ['u'],
         default: 'http://127.0.0.1:2000',
         desc: 'Piston API URL',
-        string: true
+        string: true,
     })
     .middleware(axios_instance)
     .scriptName('piston')
     .commandDir('commands')
     .demandCommand()
     .help()
-    .wrap(72)
+    .wrap(72).argv;
-    .argv;

docs/api-v2.md

@@ -17,10 +17,10 @@ Returns a list of available languages, including the version, runtime and aliase
 
 #### Response
 
-- `[].language`: Name of the language
+-   `[].language`: Name of the language
-- `[].version`: Version of the runtime
+-   `[].version`: Version of the runtime
-- `[].aliases`: List of alternative names that can be used for the language
+-   `[].aliases`: List of alternative names that can be used for the language
-- `[].runtime` (_optional_): Name of the runtime used to run the langage, only provided if alternative runtimes exist for the language
+-   `[].runtime` (_optional_): Name of the runtime used to run the langage, only provided if alternative runtimes exist for the language
 
 #### Example
 
@@ -55,34 +55,35 @@ Runs the given code, using the given runtime and arguments, returning the result
 
 #### Request
 
-- `language`: Name or alias of a language listed in [runtimes](#runtimes)
+-   `language`: Name or alias of a language listed in [runtimes](#runtimes)
-- `version`: SemVer version selector of a language listed in [runtimes](#runtimes)
+-   `version`: SemVer version selector of a language listed in [runtimes](#runtimes)
-- `files`: An array of files which should be uploaded into the job context
+-   `files`: An array of files which should be uploaded into the job context
-- `files[].name` (_optional_): Name of file to be written, if none a random name is picked
+-   `files[].name` (_optional_): Name of file to be written, if none a random name is picked
-- `files[].content`: Content of file to be written
+-   `files[].content`: Content of file to be written
-- `stdin` (_optional_): Text to pass into stdin of the program. Defaults to blank string.
+-   `files[].encoding` (_optional_): The encoding scheme used for the file content. One of `base64`, `hex` or `utf8`. Defaults to `utf8`.
-- `args` (_optional_): Arguments to pass to the program. Defaults to none
+-   `stdin` (_optional_): Text to pass into stdin of the program. Defaults to blank string.
-- `run_timeout` (_optional_): The maximum allowed time in milliseconds for the compile stage to finish before bailing out. Must be a number, less than or equal to the configured maximum timeout.
+-   `args` (_optional_): Arguments to pass to the program. Defaults to none
-- `compile_timeout` (_optional_): The maximum allowed time in milliseconds for the run stage to finish before bailing out. Must be a number, less than or equal to the configured maximum timeout. Defaults to maximum.
+-   `run_timeout` (_optional_): The maximum allowed time in milliseconds for the compile stage to finish before bailing out. Must be a number, less than or equal to the configured maximum timeout.
-- `compile_memory_limit` (_optional_): The maximum amount of memory the compile stage is allowed to use in bytes. Must be a number, less than or equal to the configured maximum. Defaults to maximum, or `-1` (no limit) if none is configured.
+-   `compile_timeout` (_optional_): The maximum allowed time in milliseconds for the run stage to finish before bailing out. Must be a number, less than or equal to the configured maximum timeout. Defaults to maximum.
-- `run_memory_limit` (_optional_): The maximum amount of memory the run stage is allowed to use in bytes. Must be a number, less than or equal to the configured maximum. Defaults to maximum, or `-1` (no limit) if none is configured.
+-   `compile_memory_limit` (_optional_): The maximum amount of memory the compile stage is allowed to use in bytes. Must be a number, less than or equal to the configured maximum. Defaults to maximum, or `-1` (no limit) if none is configured.
+-   `run_memory_limit` (_optional_): The maximum amount of memory the run stage is allowed to use in bytes. Must be a number, less than or equal to the configured maximum. Defaults to maximum, or `-1` (no limit) if none is configured.
 
 #### Response
 
-- `language`: Name (not alias) of the runtime used
+-   `language`: Name (not alias) of the runtime used
-- `version`: Version of the used runtime
+-   `version`: Version of the used runtime
-- `run`: Results from the run stage
+-   `run`: Results from the run stage
-- `run.stdout`: stdout from run stage process
+-   `run.stdout`: stdout from run stage process
-- `run.stderr`: stderr from run stage process
+-   `run.stderr`: stderr from run stage process
-- `run.output`: stdout and stderr combined in order of data from run stage process
+-   `run.output`: stdout and stderr combined in order of data from run stage process
-- `run.code`: Exit code from run process, or null if signal is not null
+-   `run.code`: Exit code from run process, or null if signal is not null
-- `run.signal`: Signal from run process, or null if code is not null
+-   `run.signal`: Signal from run process, or null if code is not null
-- `compile` (_optional_): Results from the compile stage, only provided if the runtime has a compile stage
+-   `compile` (_optional_): Results from the compile stage, only provided if the runtime has a compile stage
-- `compile.stdout`: stdout from compile stage process
+-   `compile.stdout`: stdout from compile stage process
-- `compile.stderr`: stderr from compile stage process
+-   `compile.stderr`: stderr from compile stage process
-- `compile.output`: stdout and stderr combined in order of data from compile stage process
+-   `compile.output`: stdout and stderr combined in order of data from compile stage process
-- `compile.code`: Exit code from compile process, or null if signal is not null
+-   `compile.code`: Exit code from compile process, or null if signal is not null
-- `compile.signal`: Signal from compile process, or null if code is not null
+-   `compile.signal`: Signal from compile process, or null if code is not null
 
 #### Example
 
@@ -133,9 +134,9 @@ Returns a list of all possible packages, and whether their installation status.
 
 #### Response
 
-- `[].language`: Name of the contained runtime
+-   `[].language`: Name of the contained runtime
-- `[].language_version`: Version of the contained runtime
+-   `[].language_version`: Version of the contained runtime
-- `[].installed`: Status on the package being installed
+-   `[].installed`: Status on the package being installed
 
 #### Example
 
@@ -167,13 +168,13 @@ Install the given package.
 
 #### Request
 
-- `language`: Name of package from [package list](#get-apiv2packages)
+-   `language`: Name of package from [package list](#get-apiv2packages)
-- `version`: SemVer version selector for package from [package list](#get-apiv2packages)
+-   `version`: SemVer version selector for package from [package list](#get-apiv2packages)
 
 #### Response
 
-- `language`: Name of package installed
+-   `language`: Name of package installed
-- `version`: Version of package installed
+-   `version`: Version of package installed
 
 #### Example
 
@@ -203,13 +204,13 @@ Uninstall the given package.
 
 #### Request
 
-- `language`: Name of package from [package list](#get-apiv2packages)
+-   `language`: Name of package from [package list](#get-apiv2packages)
-- `version`: SemVer version selector for package from [package list](#get-apiv2packages)
+-   `version`: SemVer version selector for package from [package list](#get-apiv2packages)
 
 #### Response
 
-- `language`: Name of package uninstalled
+-   `language`: Name of package uninstalled
-- `version`: Version of package uninstalled
+-   `version`: Version of package uninstalled
 
 #### Example
 

docs/configuration.md

@@ -50,15 +50,15 @@ Absolute path to piston related data, including packages and job contexts.
 
 ```yaml
 key:
-  - PISTON_RUNNER_UID_MIN
+    - PISTON_RUNNER_UID_MIN
-  - PISTON_RUNNER_UID_MAX
+    - PISTON_RUNNER_UID_MAX
-  - PISTON_RUNNER_GID_MIN
+    - PISTON_RUNNER_GID_MIN
-  - PISTON_RUNNER_GID_MAX
+    - PISTON_RUNNER_GID_MAX
 default:
-  - 1001
+    - 1001
-  - 1500
+    - 1500
-  - 1001
+    - 1001
-  - 1500
+    - 1500
 ```
 
 UID and GID ranges to use when executing jobs.
@@ -86,11 +86,11 @@ key: PISTON_MAX_PROCESS_COUNT
 default: 64
 ```
 
-Maximum number of processess allowed to to have open for a job.
+Maximum number of processes allowed to to have open for a job.
 
 Resists against exhausting the process table, causing a full system lockup.
 
-## Output Max Side
+## Output Max Size
 
 ```yaml
 key: PISTON_OUTPUT_MAX_SIZE
@@ -123,12 +123,27 @@ Maximum size for a singular file written to disk.
 
 Resists against large file writes to exhaust disk space.
 
+## Compile/Run timeouts
+
+```yaml
+key:
+  - PISTON_COMPILE_TIMEOUT
+default: 10000
+
+key:
+  - PISTON_RUN_TIMEOUT
+default: 3000
+```
+
+The maximum time that is allowed to be taken by a stage in milliseconds.
+Use -1 for unlimited time.
+
 ## Compile/Run memory limits
 
 ```yaml
 key:
-  - PISTON_COMPILE_MEMORY_LIMIT
+    - PISTON_COMPILE_MEMORY_LIMIT
-  - PISTON_RUN_MEMORY_LIMIT
+    - PISTON_RUN_MEMORY_LIMIT
 default: -1
 ```
 
@@ -154,3 +169,19 @@ default: 64
 ```
 
 Maximum number of jobs to run concurrently.
+
+## Limit overrides
+
+```yaml
+key: PISTON_LIMIT_OVERRIDES
+default: {}
+```
+
+Per-language overrides/exceptions for the each of `max_process_count`, `max_open_files`, `max_file_size`,
+`compile_memory_limit`, `run_memory_limit`, `compile_timeout`, `run_timeout`, `output_max_size`. Defined as follows:
+
+```
+PISTON_LIMIT_OVERRIDES={"c++":{"max_process_count":128}}
+```
+
+This will give `c++` a max_process_count of 128 regardless of the configuration.

docs/requirements.txt

@@ -1 +1 @@
-mkdocs==1.1.2
+mkdocs==1.2.3

flake.nix

@@ -21,6 +21,7 @@
             compile? null,
             packages? null,
             aliases? [],
+            limitOverrides? {},
             tests
         }: let
           compileFile = if compile != null then
@@ -28,7 +29,7 @@
             else null;
           runFile = pkgs.writeShellScript "run" run;
           metadata = {
-            inherit language version runtime aliases;
+            inherit language version runtime aliases limitOverrides;
             run = runFile;
             compile = compileFile;
             packageSupport = packages != null;

mkdocs.yml

@@ -1,15 +1,15 @@
 site_name: Piston
 nav:
-  - Home: index.md
+    - Home: index.md
-  - Configuration: configuration.md
+    - Configuration: configuration.md
-  - API: api-v2.md
+    - API: api-v2.md
 
 theme:
-  name: readthedocs
+    name: readthedocs
-  highlightjs: true
+    highlightjs: true
-  hljs_languages:
+    hljs_languages:
-    - yaml
+        - yaml
-    - json
+        - json
 
 markdown_extensions:
-  - admonition
+    - admonition

package-lock.json

@@ -0,0 +1,32 @@
+{
+    "name": "piston",
+    "lockfileVersion": 2,
+    "requires": true,
+    "packages": {
+        "": {
+            "devDependencies": {
+                "prettier": "2.4.1"
+            }
+        },
+        "node_modules/prettier": {
+            "version": "2.4.1",
+            "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.4.1.tgz",
+            "integrity": "sha512-9fbDAXSBcc6Bs1mZrDYb3XKzDLm4EXXL9sC1LqKP5rZkT6KRr/rf9amVUcODVXgguK/isJz0d0hP72WeaKWsvA==",
+            "dev": true,
+            "bin": {
+                "prettier": "bin-prettier.js"
+            },
+            "engines": {
+                "node": ">=10.13.0"
+            }
+        }
+    },
+    "dependencies": {
+        "prettier": {
+            "version": "2.4.1",
+            "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.4.1.tgz",
+            "integrity": "sha512-9fbDAXSBcc6Bs1mZrDYb3XKzDLm4EXXL9sC1LqKP5rZkT6KRr/rf9amVUcODVXgguK/isJz0d0hP72WeaKWsvA==",
+            "dev": true
+        }
+    }
+}

package.json

@@ -0,0 +1,5 @@
+{
+    "devDependencies": {
+        "prettier": "2.4.1"
+    }
+}

packages/befunge93/0.2.0/build.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+# source python 2.7
+source ../../python/2.7.18/build.sh
+
+# clone befunge repo
+git clone -q 'https://github.com/programble/befungee' befunge93
+
+# go inside befunge93 so we can checkout
+cd befunge93
+
+# checkout the version 0.2.0
+git checkout tag/v0.2.0
+
+cd ..

packages/befunge93/0.2.0/environment

@@ -2,3 +2,4 @@
 
 # Put 'export' statements here for environment variables
 export PATH=$PWD/bin:$PATH
+export BEFUNGE93_PATH=$PWD/befunge93

packages/befunge93/0.2.0/metadata.json

@@ -0,0 +1,5 @@
+{
+    "language": "befunge93",
+    "version": "0.2.0",
+    "aliases": ["b93"]
+}

packages/befunge93/0.2.0/run

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+# run the befunge program with the file name
+python2.7 "$BEFUNGE93_PATH"/befungee.py "$1"

packages/befunge93/0.2.0/test.b93

@@ -0,0 +1 @@
+64+"KO">:#,_@

packages/brachylog/1.0.0/build.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+# build prolog 8.2.4 as dependency
+source ../../prolog/8.2.4/build.sh
+
+# curl brachylog 1.0.0
+curl -L "https://github.com/JCumin/Brachylog/archive/refs/tags/v1.0-ascii.tar.gz" -o brachylog.tar.gz
+tar xzf brachylog.tar.gz --strip-components=1
+rm brachylog.tar.gz
+
+# move swi prolog to working directory
+cp bin/swipl swipl
+
+# give execution permission to swipl
+chmod +x swipl
+
+# add some code the branchylog.pl so we don't have to escape backslashes while using the interactive mode
+echo '
+
+:-feature(argv, [Code, Stdin]), run_from_atom(Code, Stdin, _), halt.' >> prolog_parser/brachylog.pl

packages/brachylog/1.0.0/environment

@@ -2,3 +2,4 @@
 
 # Put 'export' statements here for environment variables
 export PATH=$PWD/bin:$PATH
+export BRACHYLOG_PATH=$PWD

packages/brachylog/1.0.0/metadata.json

@@ -0,0 +1,5 @@
+{
+    "language": "brachylog",
+    "version": "1.0.0",
+    "aliases": []
+}

packages/brachylog/1.0.0/run

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+# save the file for later
+file="$1"
+
+# remove the file from $@
+shift
+
+# save stdin as $@ joined by newlines
+stdin=`printf "%s\n" "$@"`
+
+# save code as the contents of $file
+code=`cat "$file"`
+
+# go to the directory where brachylog.pl is so the imports work
+cd "$BRACHYLOG_PATH"/prolog_parser
+
+# run swi prolog with code and stdin
+swipl -f brachylog.pl "$code" "$stdin"

packages/brachylog/1.0.0/test.brachylog

@@ -0,0 +1 @@
+"OK"w

packages/cjam/0.6.5/metadata.json

@@ -1,5 +1,5 @@
 {
-  "language": "cjam",
+    "language": "cjam",
-  "version": "0.6.5",
+    "version": "0.6.5",
-  "aliases": []
+    "aliases": []
 }

packages/crystal/0.36.1/build.sh

@@ -1,7 +0,0 @@
-#!/bin/bash
-
-PREFIX=$(realpath $(dirname $0))
-
-curl -L "https://github.com/crystal-lang/crystal/releases/download/0.36.1/crystal-0.36.1-1-linux-x86_64.tar.gz" -o crystal.tar.gz
-tar xzf crystal.tar.gz --strip-components=1
-rm crystal.tar.gz

packages/crystal/0.36.1/compile

@@ -1,5 +0,0 @@
-#!/usr/bin/env bash
-
-# Compile crystal files into out file
-crystal build "$@" -o out --no-color && \
-chmod +x out

packages/crystal/0.36.1/environment

@@ -1 +0,0 @@
-export PATH=$PWD/bin:$PATH

packages/crystal/0.36.1/metadata.json

@@ -1,5 +0,0 @@
-{
-    "language": "crystal",
-    "version": "0.36.1",
-    "aliases": ["crystal", "cr"]
-}

packages/crystal/0.36.1/run

@@ -1,4 +0,0 @@
-#!/bin/bash
-
-shift # Filename is only used to compile
-./out "$@"

packages/crystal/0.36.1/test.cr

@@ -1 +0,0 @@
-puts("OK")

packages/dart/2.12.1/build.sh

@@ -1,11 +0,0 @@
-#!/usr/bin/env bash
-
-curl -L "https://storage.googleapis.com/dart-archive/channels/stable/release/2.12.1/sdk/dartsdk-linux-x64-release.zip" -o dart.zip
-
-unzip dart.zip
-rm dart.zip
-
-cp -r dart-sdk/* .
-rm -rf dart-sdk
-
-chmod -R +rx bin

packages/dart/2.12.1/metadata.json

@@ -1,5 +0,0 @@
-{
-    "language": "dart",
-    "version": "2.12.1",
-    "aliases": []
-}

packages/dart/2.12.1/run

@@ -1,4 +0,0 @@
-#!/usr/bin/env bash
-
-# Put instructions to run the runtime
-dart run "$@"

packages/dart/2.12.1/test.dart

@@ -1,3 +0,0 @@
-void main() {
-  print('OK');
-}

packages/dash/0.5.11/build.sh

@@ -1,19 +0,0 @@
-#!/usr/bin/env bash
-
-# Put instructions to build your package in here
-PREFIX=$(realpath $(dirname $0))
-
-mkdir -p build
-
-cd build
-
-curl "http://gondor.apana.org.au/~herbert/dash/files/dash-0.5.11.tar.gz" -o dash.tar.gz
-tar xzf dash.tar.gz --strip-components=1
-
-./configure --prefix "$PREFIX" &&
-make -j$(nproc) &&
-make install -j$(nproc)
-
-cd ../
-
-rm -rf build

packages/dash/0.5.11/metadata.json

@@ -1,5 +0,0 @@
-{
-    "language": "dash",
-    "version": "0.5.11",
-    "aliases": ["dash"]
-}

packages/dash/0.5.11/run

@@ -1,4 +0,0 @@
-#!/usr/bin/env bash
-
-# Put instructions to run the runtime
-dash "$@"

packages/dash/0.5.11/test.dash

@@ -1 +0,0 @@
-echo "OK"

packages/deno/1.7.5/build.sh

@@ -1,5 +0,0 @@
-curl -L https://github.com/denoland/deno/releases/download/v1.7.5/deno-x86_64-unknown-linux-gnu.zip --output deno.zip
-unzip -o deno.zip
-rm deno.zip
-
-chmod +x deno

packages/deno/1.7.5/environment

@@ -1 +0,0 @@
-export PATH=$PWD:$PATH

packages/deno/1.7.5/metadata.json

@@ -1,14 +0,0 @@
-{
-    "language": "deno",
-    "version": "1.7.5",
-    "provides": [
-        {
-            "language": "typescript",
-            "aliases": ["deno-ts","deno"]
-        },
-        {
-            "language": "javascript",
-            "aliases": ["deno-js"]
-        }
-    ]
-}

packages/deno/1.7.5/run

@@ -1,2 +0,0 @@
-#!/bin/bash
-DENO_DIR=$PWD deno run "$@"

packages/deno/1.7.5/test.deno.ts

@@ -1 +0,0 @@
-console.log("OK")

packages/dotnet/5.0.201/build.sh

@@ -7,8 +7,10 @@ rm dotnet.tar.gz
 # Cache nuget packages
 export DOTNET_CLI_HOME=$PWD
 ./dotnet new console -o cache_application
+./dotnet new console -lang F# -o fs_cache_application
+./dotnet new console -lang VB -o vb_cache_application
 # This calls a restore on the global-packages index ($DOTNET_CLI_HOME/.nuget/packages)
 # If we want to allow more packages, we could add them to this cache_application
 
-rm -rf cache_application
+rm -rf cache_application fs_cache_application vb_cache_application
-# Get rid of it, we don't actually need the application - just the restore
+# Get rid of it, we don't actually need the application - just the restore

packages/dotnet/5.0.201/compile

@@ -1,15 +1,36 @@
 #!/usr/bin/env bash
 
+[ "${PISTON_LANGUAGE}" == "fsi" ] && exit 0
+
 export DOTNET_CLI_HOME=$PWD
 export HOME=$PWD
 
-rename 's/$/\.cs/' "$@" # Add .cs extension
-
 dotnet build --help > /dev/null # Shut the thing up
 
-dotnet new console -o . --no-restore
+case "${PISTON_LANGUAGE}" in
-rm Program.cs
+    basic.net)
+        rename 's/$/\.vb/' "$@" # Add .vb extension
+        dotnet new console -lang VB -o . --no-restore
+        rm Program.vb
+        ;;
+    fsharp.net)
+        first_file=$1
+        shift
+        rename 's/$/\.fs/' "$@" # Add .fs extension
+        dotnet new console -lang F# -o . --no-restore
+        mv $first_file Program.fs  # For some reason F#.net doesn't work unless the file name is Program.fs
+        ;;
+    csharp.net)
+        rename 's/$/\.cs/' "$@" # Add .cs extension
+        dotnet new console -o . --no-restore
+        rm Program.cs
+        ;;
+    *)
+        echo "How did you get here? (${PISTON_LANGUAGE})"
+        exit 1
+        ;;
 
+esac
 
 dotnet restore --source $DOTNET_ROOT/.nuget/packages
-dotnet build --no-restore
+dotnet build --no-restore

packages/dotnet/5.0.201/environment

@@ -2,4 +2,5 @@
 
 # Put 'export' statements here for environment variables
 export DOTNET_ROOT=$PWD
-export PATH=$DOTNET_ROOT:$PATH
+export PATH=$DOTNET_ROOT:$PATH
+export FSI_PATH=$(find $(pwd) -name fsi.dll)

packages/dotnet/5.0.201/metadata.json

@@ -1,5 +1,66 @@
 {
     "language": "dotnet",
     "version": "5.0.201",
-    "aliases": ["cs", "csharp"]
+    "provides": [
+        {
+            "language": "basic.net",
+            "aliases": [
+                "basic",
+                "visual-basic",
+                "visual-basic.net",
+                "vb",
+                "vb.net",
+                "vb-dotnet",
+                "dotnet-vb",
+                "basic-dotnet",
+                "dotnet-basic"
+            ],
+            "limit_overrides": { "max_process_count": 128 }
+        },
+        {
+            "language": "fsharp.net",
+            "aliases": [
+                "fsharp",
+                "fs",
+                "f#",
+                "fs.net",
+                "f#.net",
+                "fsharp-dotnet",
+                "fs-dotnet",
+                "f#-dotnet",
+                "dotnet-fsharp",
+                "dotnet-fs",
+                "dotnet-fs"
+            ],
+            "limit_overrides": { "max_process_count": 128 }
+        },
+        {
+            "language": "csharp.net",
+            "aliases": [
+                "csharp",
+                "c#",
+                "cs",
+                "c#.net",
+                "cs.net",
+                "c#-dotnet",
+                "cs-dotnet",
+                "csharp-dotnet",
+                "dotnet-c#",
+                "dotnet-cs",
+                "dotnet-csharp"
+            ],
+            "limit_overrides": { "max_process_count": 128 }
+        },
+        {
+            "language": "fsi",
+            "aliases": [
+                "fsx",
+                "fsharp-interactive",
+                "f#-interactive",
+                "dotnet-fsi",
+                "fsi-dotnet",
+                "fsi.net"
+            ]
+        }
+    ]
 }

packages/dotnet/5.0.201/run

@@ -3,5 +3,23 @@
 # Put instructions to run the runtime
 export DOTNET_CLI_HOME=$PWD
 
-shift
+case "${PISTON_LANGUAGE}" in
-dotnet bin/Debug/net5.0/$(basename $(realpath .)).dll "$@"
+    basic.net)
+        ;&
+    fsharp.net)
+        ;&
+    csharp.net)
+        shift
+        dotnet bin/Debug/net5.0/$(basename $(realpath .)).dll "$@"
+        ;;
+    fsi)
+        FILENAME=$1
+        rename 's/$/\.fsx/' $FILENAME # Add .fsx extension
+        shift
+        dotnet $FSI_PATH $FILENAME.fsx "$@"
+        ;;
+    *)
+        echo "How did you get here? (${PISTON_LANGUAGE})"
+        exit 1
+        ;;
+esac

packages/dotnet/5.0.201/test.fs

@@ -0,0 +1,6 @@
+open System
+
+[<EntryPoint>]
+let main argv =
+    printfn "OK"
+    0

packages/dotnet/5.0.201/test.fsx

@@ -0,0 +1 @@
+printfn "OK"

packages/dotnet/5.0.201/test.vb

@@ -0,0 +1,9 @@
+Imports System
+
+Module Module1
+
+    Sub Main()
+        Console.WriteLine("OK")
+    End Sub
+
+End Module

packages/dragon/1.9.8/metadata.json

@@ -1,5 +1,5 @@
 {
-  "language": "dragon",
+    "language": "dragon",
-  "version": "1.9.8",
+    "version": "1.9.8",
-  "aliases": []
+    "aliases": []
 }

packages/elixir/1.11.3/build.sh

@@ -1,25 +0,0 @@
-#!/bin/bash
-
-source ../../erlang/23.0.0/build.sh
-
-export PATH=$PWD/bin:$PATH
-
-PREFIX=$(realpath $(dirname $0))
-
-mkdir -p build
-
-cd build
-
-curl -L "https://github.com/elixir-lang/elixir/archive/v1.11.3.tar.gz" -o elixir.tar.gz
-tar xzf elixir.tar.gz --strip-components=1
-rm elixir.tar.gz
-
-./configure --prefix "$PREFIX"
-make -j$(nproc)
-
-cd ..
-
-cp -r build/bin .
-cp -r build/lib .
-
-rm -rf build

packages/elixir/1.11.3/environment

@@ -1,5 +0,0 @@
-#!/usr/bin/env bash
-
-# Put 'export' statements here for environment variables
-export LC_ALL=en_US.UTF-8
-export PATH=$PWD/bin:$PATH

packages/elixir/1.11.3/metadata.json

@@ -1,5 +0,0 @@
-{
-    "language": "elixir",
-    "version": "1.11.3",
-    "aliases": ["elixir", "exs"]
-}

packages/elixir/1.11.3/run

@@ -1,4 +0,0 @@
-#!/bin/bash
-
-# Put instructions to run the runtime
-elixir "$@"

packages/elixir/1.11.3/test.exs

@@ -1 +0,0 @@
-IO.puts("OK")

packages/erlang/23.0.0/build.sh

@@ -1,21 +0,0 @@
-#!/bin/bash
-
-PREFIX=$(realpath $(dirname $0))
-
-mkdir -p build
-
-cd build
-
-curl "http://erlang.org/download/otp_src_23.0.tar.gz" -o erlang.tar.gz
-tar xzf erlang.tar.gz --strip-components=1
-rm erlang.tar.gz
-
-export ERL_TOP=$(pwd)
-./configure --prefix "$PREFIX"
-make -j$(nproc)
-make install -j$(nproc)
-
-cd ..
-
-rm -rf build 
-

packages/erlang/23.0.0/environment

@@ -1,4 +0,0 @@
-#!/usr/bin/env bash
-
-# Put 'export' statements here for environment variables
-export PATH=$PWD/bin:$PATH

packages/erlang/23.0.0/metadata.json

@@ -1,5 +0,0 @@
-{
-    "language": "erlang",
-    "version": "23.0.0",
-    "aliases": ["erlang", "erl", "escript"]
-}

packages/erlang/23.0.0/run

@@ -1,4 +0,0 @@
-#!/bin/bash
-
-# Put instructions to run the runtime
-escript "$@"

packages/erlang/23.0.0/test.erl

@@ -1,3 +0,0 @@
-
-main(_) ->
-    io:format("OK~n").

packages/forte/1.0.0/metadata.json

@@ -1,5 +1,5 @@
 {
-  "language": "forte",
+    "language": "forte",
-  "version": "1.0.0",
+    "version": "1.0.0",
-  "aliases": ["forter"]
+    "aliases": ["forter"]
 }

packages/gawk/5.1.0/build.sh

@@ -1,21 +0,0 @@
-#!/usr/bin/env bash
-
-# Put instructions to build your package in here
-PREFIX=$(realpath $(dirname $0))
-
-mkdir -p build
-
-cd build
-
-curl "https://ftp.gnu.org/gnu/gawk/gawk-5.1.0.tar.gz" -o gawk.tar.gz
-
-tar xzf gawk.tar.gz --strip-components=1
-
-# === autoconf based ===
-./configure --prefix "$PREFIX"
-
-make -j$(nproc)
-make install -j$(nproc)
-cd ../
-rm -rf build
-

packages/gawk/5.1.0/environment

@@ -1,4 +0,0 @@
-#!/usr/bin/env bash
-
-# Put 'export' statements here for environment variables
-export PATH=$PWD/bin:$PATH

packages/gawk/5.1.0/metadata.json

@@ -1,10 +0,0 @@
-{
-    "language": "gawk",
-    "version": "5.1.0",
-    "provides": [
-        {
-            "language": "awk",
-            "aliases": ["gawk"]
-        }
-    ]
-}

packages/gawk/5.1.0/run

@@ -1,4 +0,0 @@
-#!/usr/bin/env bash
-
-# Put instructions to run the runtime
-gawk-5.1.0 -f "$@"

packages/gawk/5.1.0/test.awk

@@ -1 +0,0 @@
-{print "OK"}

packages/gcc/10.2.0/metadata.json

@@ -3,7 +3,7 @@
     "version": "10.2.0",
     "provides": [
         {
-            "language":"c",
+            "language": "c",
             "aliases": ["gcc"]
         },
         {

packages/golfscript/1.0.0/metadata.json

@@ -1,5 +1,5 @@
 {
-  "language": "golfscript",
+    "language": "golfscript",
-  "version": "1.0.0",
+    "version": "1.0.0",
-  "aliases": ["golfscript"]
+    "aliases": ["golfscript"]
 }

packages/groovy/3.0.7/metadata.json

@@ -1,5 +1,5 @@
 {
-  "language": "groovy",
+    "language": "groovy",
-  "version": "3.0.7",
+    "version": "3.0.7",
-  "aliases": ["groovy", "gvy"]
+    "aliases": ["groovy", "gvy"]
 }

packages/husk/1.0.0/build.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+cp ../../haskell/9.0.1/build.sh ./haskell-build.sh
+sed -Ei 's/9\.0\.1/8\.10\.7/g' ./haskell-build.sh
+source ./haskell-build.sh
+
+# compile Husk from source
+git clone -q "https://github.com/barbuz/husk.git"
+cd husk
+../bin/ghc -O2 Husk
+
+# cleanup
+cd ..
+rm -f haskell-build.sh

packages/husk/1.0.0/environment

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+# haskell and husk path
+export PATH=$PWD/bin:$PATH
+export HUSK_PATH=$PWD/husk
+export LANG=en_US.UTF8

packages/husk/1.0.0/metadata.json

@@ -0,0 +1,5 @@
+{
+  "language": "husk",
+  "version": "1.0.0",
+  "aliases": []
+}

packages/husk/1.0.0/run

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+# Store the current path because we'll need it to run the program file
+PROGRAM_PATH=$PWD
+
+# For now, Husk can only be run within the folder that has the imported modules
+cd $HUSK_PATH
+
+# Run Husk from file in unicode format with the given args
+./Husk -uf "${PROGRAM_PATH}/${@}"

packages/husk/1.0.0/test.husk

@@ -0,0 +1 @@
+"OK

packages/japt/2.0.0/metadata.json

@@ -1,5 +1,5 @@
 {
-  "language": "japt",
+    "language": "japt",
-  "version": "2.0.0",
+    "version": "2.0.0",
-  "aliases": ["japt"]
+    "aliases": ["japt"]
-}
+}

packages/llvm_ir/12.0.1/build.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+curl -L "https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.1/clang+llvm-12.0.1-x86_64-linux-gnu-ubuntu-16.04.tar.xz" -o llvm-ir.tar.xz
+
+tar xf llvm-ir.tar.xz clang+llvm-12.0.1-x86_64-linux-gnu-ubuntu-/bin --strip-components=1
+
+rm llvm-ir.tar.xz

packages/llvm_ir/12.0.1/compile

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+llc "$@" -o binary.s
+clang binary.s -o binary

packages/llvm_ir/12.0.1/environment

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+export PATH=$PWD/bin:$PATH

packages/llvm_ir/12.0.1/metadata.json

@@ -0,0 +1,5 @@
+{
+    "language": "llvm_ir",
+    "version": "12.0.1",
+    "aliases": ["llvm", "llvm-ir", "ll"]
+}

packages/llvm_ir/12.0.1/run

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+shift
+binary "$@"

packages/llvm_ir/12.0.1/test.ll

@@ -0,0 +1,10 @@
+@.str = private unnamed_addr constant [2 x i8] c"OK"
+
+declare i32 @puts(i8* nocapture) nounwind
+
+define i32 @main() {
+    %cast210 = getelementptr [2 x i8],[2 x i8]* @.str, i64 0, i64 0
+
+    call i32 @puts(i8* %cast210)
+    ret i32 0
+}