Use Docker volumes and nodemon in development

Dockerfile.withset

@@ -1,9 +1,9 @@
 # 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/
+ENV PISTON_FLAKE_PATH=/piston/src
+COPY runtimes/ /piston/src/runtimes
+COPY flake.nix flake.lock /piston/src/
 
 
 ARG RUNTIMESET=all

api/default.nix

@@ -42,6 +42,12 @@ with pkgs; rec {
       gnugrep
       rename
       util-linux
+      nodejs-16_x
+      yarn
+      python3
+      gcc
+      gnumake
+      gnused
     ];
 
     extraCommands = ''
@@ -53,6 +59,9 @@ with pkgs; rec {
         echo "nixbld$i:x:$(( $i + 30000 )):30000:Nix build user $i:/var/empty:/run/current-system/sw/bin/nologin" >> etc/passwd
       done
 
+      mkdir -p usr/bin
+      ln -s /bin/env usr/bin/env
+      chmod -R 1777 usr
       chmod 1777 {,var/}tmp/
     '';
 

api/package.json

@@ -8,18 +8,20 @@
         "express": "^4.17.1",
         "express-ws": "^5.0.2",
         "logplease": "^1.2.15",
+        "nocamel": "git://github.com/HexF/nocamel.git#patch-1",
         "node-fetch": "^2.6.1",
         "uuid": "^8.3.2",
-        "nocamel": "git://github.com/HexF/nocamel.git#patch-1",
         "waitpid": "git://github.com/HexF/node-waitpid.git"
     },
     "license": "MIT",
     "scripts": {
+        "dev": "nodemon .",
         "lint": "prettier . --write",
         "prepack": "yarn2nix > yarn.nix"
     },
     "devDependencies": {
         "node2nix": "^1.6.0",
+        "nodemon": "^2.0.15",
         "prettier": "2.2.1"
     },
     "bin": {

piston

@@ -3,6 +3,7 @@ SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 
 
 CONTAINER_NAME="piston_api"
+DEV_VOLUME_NAME="piston_nix"
 
 IMAGE_TAG="base-latest"
 IMAGE_NAME="ghcr.io/engineer-man/piston"
@@ -37,6 +38,19 @@ case "$SUBCOMMAND" in
         docker pull "$IMAGE_NAME:$IMAGE_TAG"
         ;;
 
+    build)
+        runtime_set=all
+        if [[ ! -z "$1" ]]; then
+            runtime_Set=$1
+        fi
+        # $1 contains a variant to build
+        docker build \
+            --build-arg RUNTIMESET=$1 \
+            -f "$SCRIPT_DIR"/Dockerfile.withset \
+            -t "$IMAGE_NAME_DEV:$1-latest" \
+            .
+        ;;
+
     # dev commands
 
     scaffold)
@@ -45,20 +59,27 @@ case "$SUBCOMMAND" in
         popd > /dev/null
         ;;
 
-    build)
+    build-dev)
+        echo "Removing the Nix volume if it exists"
+        docker volume rm -f $DEV_VOLUME_NAME
+        echo "Building the base docker image"
         build_base
-        if [[ ! -z "$1" ]]; then
-            # $1 contains a variant to build
-            docker build \
-                --build-arg RUNTIMESET=$1 \
-                -f "$SCRIPT_DIR"/Dockerfile.withset \
-                -t "$IMAGE_NAME_DEV:$1-latest" \
-                .
-        fi
+        echo "Installing the required node modules"
+        docker run \
+            --rm \
+            -p 2000:2000 \
+            -it \
+            --name $CONTAINER_NAME \
+            -e PISTON_LOG_LEVEL=DEBUG \
+            -e PISTON_FLAKE_PATH=/piston/src \
+            -e PISTON_RUNTIME_SET=none \
+            -v "$SCRIPT_DIR":/piston/src \
+            "$IMAGE_NAME_DEV:$IMAGE_TAG" \
+            bash -c "cd /piston/src/api && yarn install"
+        echo "Done building"
         ;;
 
     start-dev)
-        build_base
         runtime_set=all
         if [[ ! -z "$1" ]]; then
             runtime_set=$1
@@ -69,23 +90,24 @@ case "$SUBCOMMAND" in
             -it \
             --name $CONTAINER_NAME \
             -e PISTON_LOG_LEVEL=DEBUG \
-            -e PISTON_FLAKE_PATH=/piston/packages \
+            -e PISTON_FLAKE_PATH=/piston/src \
             -e PISTON_RUNTIME_SET=$runtime_set \
-            -v "$SCRIPT_DIR":/piston/packages \
-            -d "$IMAGE_NAME_DEV:$IMAGE_TAG"
-    ;;
+            -v "$SCRIPT_DIR":/piston/src \
+            -v $DEV_VOLUME_NAME:/nix \
+            -d "$IMAGE_NAME_DEV:$IMAGE_TAG" \
+            bash -c "cd /piston/src/api && yarn run dev"
+        ;;
 
     test)
-        build_base
         docker run \
             --rm \
             -it \
-            -e PISTON_FLAKE_PATH=/piston/packages \
-            -v "$SCRIPT_DIR":/piston/packages \
+            -e PISTON_FLAKE_PATH=/piston/src \
+            -v "$SCRIPT_DIR":/piston/src \
+            -v $DEV_VOLUME_NAME:/nix \
             --name piston_test_runner \
             "$IMAGE_NAME_DEV:$IMAGE_TAG" \
-            piston-test $1
-
+            bash -c "/piston/src/api/src/bin/test.js $1"
         ;;
 
     *)