ci: try build on alpine

Author: jpnurmi

.github/actions/environment/action.yml

@@ -19,6 +19,7 @@ runs:
 
     # Needed for Android SDK setup step
     - uses: actions/setup-java@v3
+      if: ${{ !matrix.runner.container }}
       with:
         distribution: 'temurin'
         java-version: '17'
@@ -41,6 +42,7 @@ runs:
         cd -
 
     - name: Set Java Version
+      if: ${{ !matrix.runner.container }}
       uses: actions/setup-java@v3
       with:
         distribution: 'temurin'

.github/workflows/build.yml

@@ -11,16 +11,29 @@ on:
 
 jobs:
   build-sentry-native:
-    name: sentry-native (${{ matrix.os }})
-    runs-on: ${{ matrix.os }}
+    name: sentry-native (${{ matrix.runner.container || matrix.runner.os }})
+    runs-on: ${{ matrix.runner.os }}
+    container: ${{ matrix.runner.container }}
     strategy:
       fail-fast: false
       matrix:
         # Pin ubuntu to ensure mono is installed
         # Pin macos to get the version of Xcode that we need: https://github.com/actions/runner-images/issues/10703
-        os: [ubuntu-22.04, windows-latest, macos-15]
+        runner: [
+          {os: ubuntu-22.04},
+          {os: ubuntu-latest, container: alpine:3.21},
+          {os: windows-latest},
+          {os: macos-15}
+        ]
 
     steps:
+      - name: Install build dependencies for Alpine Linux
+        if: ${{ startsWith(matrix.runner.container, 'alpine') }}
+        run: |
+          apk update
+          apk add bash build-base cmake curl-dev git powershell sudo tar wget
+          git config --global --add safe.directory $GITHUB_WORKSPACE
+
       - name: Checkout
         uses: actions/checkout@v4
 
@@ -30,14 +43,15 @@ jobs:
         id: cache
         with:
           path: src/Sentry/Platforms/Native/sentry-native
-          key: sentry-native-${{ runner.os }}-${{ hashFiles('scripts/build-sentry-native.ps1') }}-${{ hashFiles('.git/modules/modules/sentry-native/HEAD') }}
+          key: sentry-native-${{ matrix.runner.container || runner.os }}-${{ hashFiles('scripts/build-sentry-native.ps1') }}-${{ hashFiles('.git/modules/modules/sentry-native/HEAD') }}
           enableCrossOsArchive: true
 
       - name: Remove unused applications
+        if: ${{ !matrix.runner.container }}
         uses: ./.github/actions/freediskspace
 
       - name: Install build dependencies
-        if: steps.cache.outputs.cache-hit != 'true' && runner.os == 'Linux'
+        if: steps.cache.outputs.cache-hit != 'true' && runner.os == 'Linux' && !matrix.runner.container
         run: |
           sudo apt update
           sudo apt install libcurl4-openssl-dev
@@ -48,28 +62,44 @@ jobs:
 
   build:
     needs: build-sentry-native
-    name: .NET (${{ matrix.os }})
-    runs-on: ${{ matrix.os }}
+    name: .NET (${{ matrix.runner.container || matrix.runner.os }})
+    runs-on: ${{ matrix.runner.os }}
+    container: ${{ matrix.runner.container }}
 
     strategy:
       fail-fast: false
       matrix:
         # Pin ubuntu to ensure mono is installed
         # Pin macos to get the version of Xcode that we need: https://github.com/actions/runner-images/issues/10703
-        os: [ubuntu-22.04, windows-latest, macos-15]
+        runner: [
+          {os: ubuntu-22.04},
+          {os: ubuntu-latest, container: alpine:3.21},
+          {os: windows-latest},
+          {os: macos-15}
+        ]
 
     steps:
       - name: Cancel Previous Runs
         if: github.ref_name != 'main' && !startsWith(github.ref_name, 'release/')
         uses: styfle/cancel-workflow-action@85880fa0301c86cca9da44039ee3bb12d3bedbfa # Tag: 0.12.1
 
+      - name: Install build dependencies for Alpine Linux
+        if: ${{ startsWith(matrix.runner.container, 'alpine') }}
+        run: |
+          apk update
+          apk add bash build-base cmake curl-dev git openjdk11 openjdk17 powershell sudo tar wget
+          git config --global --add safe.directory $GITHUB_WORKSPACE
+          curl -sSL --retry 5 https://dot.net/v1/dotnet-install.sh | bash -eo pipefail /dev/stdin --channel 9.0 --install-dir /usr/share/dotnet
+          ln -s /usr/share/dotnet/dotnet /usr/local/bin/dotnet
+
       - name: Checkout
         uses: actions/checkout@v4
         with:
           submodules: recursive
           fetch-depth: 2 # default is 1 and codecov needs > 1
 
       - name: Remove unused applications
+        if: ${{ !matrix.runner.container }}
         uses: ./.github/actions/freediskspace
 
       # We use macOS for the final publishing build so we get all the iOS/macCatalyst targets in the packages
@@ -85,6 +115,14 @@ jobs:
           key: sentry-native-Linux-${{ hashFiles('scripts/build-sentry-native.ps1') }}-${{ hashFiles('.git/modules/modules/sentry-native/HEAD') }}
           fail-on-cache-miss: true
 
+      - name: Download sentry-native (Linux musl)
+        if: ${{ (env.CI_PUBLISHING_BUILD == 'true') || (startsWith(matrix.runner.container, 'alpine')) }}
+        uses: actions/cache/restore@v4
+        with:
+          path: src/Sentry/Platforms/Native/sentry-native
+          key: sentry-native-alpine:3.21-${{ hashFiles('scripts/build-sentry-native.ps1') }}-${{ hashFiles('.git/modules/modules/sentry-native/HEAD') }}
+          fail-on-cache-miss: true
+
       - name: Download sentry-native (macOS)
         if: ${{ (env.CI_PUBLISHING_BUILD == 'true') || (runner.os == 'macOS') }}
         uses: actions/cache/restore@v4
@@ -106,6 +144,7 @@ jobs:
         uses: ./.github/actions/environment
 
       - name: Build Native Dependencies
+        if: ${{ ! matrix.runner.container }}
         uses: ./.github/actions/buildnative
 
       - name: Restore .NET Dependencies