migrate powershell to nix

packages/pwsh/7.1.4/build.sh

@@ -1,6 +0,0 @@
-#!/bin/bash
-curl -L https://github.com/PowerShell/PowerShell/releases/download/v7.1.4/powershell-7.1.4-linux-x64.tar.gz -o powershell.tar.gz
-tar zxf powershell.tar.gz
-rm powershell.tar.gz
-
-chmod +x pwsh

packages/pwsh/7.1.4/environment

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

packages/pwsh/7.1.4/metadata.json

@@ -1,10 +0,0 @@
-{
-    "language": "pwsh",
-    "version": "7.1.4",
-    "provides": [
-        {
-            "language": "powershell",
-            "aliases": ["ps", "pwsh", "ps1"]
-        }
-    ]
-}

packages/pwsh/7.1.4/run

@@ -1,3 +0,0 @@
-#!/bin/bash
-
-pwsh "$@"

packages/pwsh/7.1.4/test.ps1

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

runtimes/default.nix

@@ -23,4 +23,5 @@ args: {
     "rscript" = import ./rscript.nix args;
     "raku" = import ./raku.nix args;
     "racket" = import ./racket.nix args;
+    "powershell" = import ./powershell.nix args;
 }

runtimes/powershell.nix

@@ -0,0 +1,58 @@
+{pkgs, piston, ...}:
+let
+    pkg = pkgs.powershell;
+in piston.mkRuntime {
+    language = "powershell";
+    version = pkg.version;
+
+    aliases = [
+        "pwsh"
+        "ps"
+        "ps1"
+    ];
+    
+    run = ''
+        ${pkg}/bin/pwsh "$@"
+    '';
+
+    tests = [
+        # test different file extension
+        (piston.mkTest {
+            files = {
+                "test.code" = ''
+                    echo "OK"
+                '';
+            };
+            args = [];
+            stdin = "";
+            packages = [];
+            main = "test.code";
+        })
+        # test argv
+        (piston.mkTest {
+            files = {
+                "test.pwsh" = ''
+                    foreach ($s in $args) {
+                        Write-Host $s
+                    }
+                '';
+            };
+            args = ["OK"];
+            stdin = "";
+            packages = [];
+            main = "test.pwsh";
+        })
+        # test stdin
+        (piston.mkTest {
+            files = {
+                "test.pwsh" = ''
+                    $s = Read-Host
+                '';
+            };
+            args = [];
+            stdin = "OK";
+            packages = [];
+            main = "test.pwsh";
+        })
+    ];
+}