Add support for windows build on GitHub (#312)

This PR adds a Windows build pipeline running on GitHub.
Currently it runs on the repository https://github.com/Crown0815/forgejo-runner-windows.

So far the build does not include tests, but I am working on a solution.
For the time being we can release the windows builds easily though.

Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/312
Co-authored-by: Felix Kröner <felix.kroener@gmx.de>
Co-committed-by: Felix Kröner <felix.kroener@gmx.de>

.github/workflows/build-release.yml

@@ -0,0 +1,48 @@
+# This workflow will build a Windows binary for each architecture and upload it as an artifact.
+# If the push is a tag, it will create a release with the binaries attached.
+# This build is currently supported on https://github.com/Crown0815/forgejo-runner-windows
+
+name: Build release
+
+on:
+  push:
+    tags: 'v*'
+jobs:
+  build:
+    name: Build ${{matrix.architecture}}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        architecture: ['386', amd64, arm, arm64]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build for ${{matrix.architecture}}
+        run: |
+          env GOOS=windows GOARCH=${{matrix.architecture}} \
+          go build -o forgejo-runner-windows-${{matrix.architecture}}.exe
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: forgejo-runner-windows-${{matrix.architecture}}
+          path: forgejo-runner-windows-${{matrix.architecture}}.exe
+
+  release:
+    runs-on: ubuntu-latest
+    needs: build
+    if: github.event_name == 'push' && github.ref_type == 'tag'
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: .
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ github.ref_name }}
+          files: forgejo-runner-windows-*/forgejo-runner-windows-*.exe
+          draft: false
+          prerelease: ${{ contains(github.ref, 'beta') || contains(github.ref, 'alpha') }}
+          token: ${{ secrets.RELEASE_TOKEN }}
+          fail_on_unmatched_files: true
+          body: See [original release notes](https://code.forgejo.org/forgejo/runner/releases/tag/${{ github.ref_name }}).
+

.gitignore

@@ -12,3 +12,6 @@ coverage.txt
 __debug_bin
 # gorelease binary folder
 dist
+
+# Jetbrains IDE
+.idea