Add alpine support

Author: kassane

.github/workflows/ci.yml

@@ -1,5 +1,11 @@
 name: Artifacts
-on: [push]
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
 jobs:
   build:
     strategy:
@@ -32,6 +38,7 @@ jobs:
           dub -b release -- list -v
           dub -b release -- run -v -- --version
       - uses: actions/upload-artifact@v4
+        if: github.ref == 'refs/heads/main'
         with:
           name: ldcup-${{ matrix.os }}-${{ matrix.arch }}
           path: bin
@@ -40,7 +47,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Test in FreeBSD
+      - name: Run FreeBSD VM
         uses: vmactions/freebsd-vm@v1
         with:
           usesh: true
@@ -55,6 +62,37 @@ jobs:
             dub -b release -- list -v
             dub -b release -- run -v -- --version
       - uses: actions/upload-artifact@v4
+        if: github.ref == 'refs/heads/main'
         with:
           name: ldcup-freebsd-14.2-amd64
           path: bin
+
+  alpine:
+    strategy:
+      fail-fast: false
+    runs-on: ubuntu-latest
+    container:
+      image: alpine:latest
+    defaults:
+      run:
+        shell: sh
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Prepare
+        run: |
+            apk update
+            apk add --no-cache ldc dub clang
+      - name: Build
+        run: |
+            dub -b release
+      # - name: Tests
+      #   run: |
+      #       dub -b release -- install ldc2-nightly -v
+      #       dub -b release -- list -v
+      
+      - uses: actions/upload-artifact@v4
+        if: github.ref == 'refs/heads/main'
+        with:
+          name: ldcup-alpine-amd64
+          path: bin

dub.json

@@ -1,6 +1,6 @@
 {
 	"name": "ldcup",
-	"version": "1.0.6",
+	"version": "1.0.7",
 	"description": "Download and manage D compiler [ldc2].",
 	"license": "Apache-2.0",
 	"targetPath": "bin",

source/impl.d

@@ -4,6 +4,7 @@ public import std;
 
 enum OS
 {
+    alpine,
     android,
     freebsd,
     linux,
@@ -85,14 +86,17 @@ class CompilerManager
         else version (FreeBSD)
             this.currentOS = OS.freebsd;
         else version (linux)
-            this.currentOS = OS.linux;
+            version (CRuntime_Musl)
+                this.currentOS = OS.alpine;
+            else
+                this.currentOS = OS.linux;
         else version (Windows)
-        {
-            this.currentOS = OS.windows;
-            this.currentArch = Arch.multilib;
-        }
-        else
-            static assert(0, "Unsupported operating system");
+                {
+                    this.currentOS = OS.windows;
+                    this.currentArch = Arch.multilib;
+                }
+                else
+                    static assert(0, "Unsupported operating system");
     }
 
     void installCompiler(string compilerSpec) @safe
@@ -231,9 +235,27 @@ class CompilerManager
     {
         try
         {
-            version (linux)
+            version (FreeBSD)
+            {
+                auto result = execute([
+                    "getent", "passwd", environment.get("USER", "root")
+                ]);
+                if (result.status == 0)
+                {
+
+                    string[] parts = result.output.split(":");
+                    if (parts.length > 6)
+                    {
+
+                        return parts[6].strip();
+                    }
+                }
+            }
+            else version (linux)
             {
-                auto result = execute(["getent", "passwd", environment["USER"]]);
+                auto result = execute([
+                    "getent", "passwd", environment.get("USER", "root")
+                ]);
                 if (result.status == 0)
                 {
                     string[] parts = result.output.split(":");