fix: build Arch packages without archlinux container

The Gitea runner is ARM64 and archlinux:latest has no ARM64 image.
Drop the container entirely and build .pkg.tar.zst manually:
cross-compile with Go and assemble the package archive directly,
so no makepkg or Arch Linux toolchain is needed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/arch-publish.yml

@@ -8,9 +8,6 @@ jobs:
   build-arch:
     runs-on:
       - ubuntu-24.04
-    container:
-      image: archlinux:latest
-      options: --platform linux/amd64
     strategy:
       matrix:
         include:
@@ -20,42 +17,54 @@ jobs:
             pkgarch: aarch64
     steps:
       - name: Install build dependencies
-        run: pacman -Syu --noconfirm git nodejs go base-devel curl
+        run: sudo apt-get update -qq && sudo apt-get install -y --no-install-recommends zstd curl
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: src/go.mod
 
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Create build user
+      - name: Build binary
         run: |
-          useradd -m build
-          echo "build ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
-          chown -R build:build .
+          cd src
+          GOARCH=${{ matrix.goarch }} GOOS=linux GOTOOLCHAIN=auto \
+            go build -ldflags="-s -w" -trimpath -o axolotl .
 
-      - name: Configure git safe directory
-        run: git config --global --add safe.directory "$PWD"
-
-      - name: Prepare source
+      - name: Create package
         run: |
           pkgver=$(echo "${{ github.ref_name }}" | sed 's/^v//')
           pkgname="axolotl"
+          pkgrel=1
+          pkgarch="${{ matrix.pkgarch }}"
 
-          sed -i "s/pkgver=.*/pkgver=$pkgver/" packaging/arch/PKGBUILD
-          sed -i "s/^arch=.*/arch=('${{ matrix.pkgarch }}')/" packaging/arch/PKGBUILD
+          pkgdir=$(mktemp -d)/pkg
+          mkdir -p "$pkgdir/usr/bin"
+          install -Dm755 src/axolotl "$pkgdir/usr/bin/axolotl"
+          ln -s axolotl "$pkgdir/usr/bin/ax"
 
-          git archive --format=tar.gz --prefix="$pkgname-$pkgver/" -o "packaging/arch/$pkgname-$pkgver.tar.gz" HEAD
+          size=$(du -sb "$pkgdir/usr" | awk '{print $1}')
+          cat > "$pkgdir/.PKGINFO" <<EOF
+          pkgname = $pkgname
+          pkgver = $pkgver-$pkgrel
+          pkgdesc = CLI-native issue tracker using SQLite
+          url = https://g.eliaskohout.de/eliaskohout/axolotl
+          builddate = $(date +%s)
+          packager = Gitea Actions
+          size = $size
+          arch = $pkgarch
+          license = MIT
+          EOF
 
-          sha=$(sha512sum "packaging/arch/$pkgname-$pkgver.tar.gz" | awk '{print $1}')
-          sed -i "s|source=.*|source=(\"$pkgname-$pkgver.tar.gz\")|" packaging/arch/PKGBUILD
-          sed -i "s|sha512sums=.*|sha512sums=('$sha')|" packaging/arch/PKGBUILD
-          chown -R build:build .
-
-      - name: Build package
-        run: su build -c "cd $PWD/packaging/arch && GOARCH=${{ matrix.goarch }} CARCH=${{ matrix.pkgarch }} makepkg -s --noconfirm"
+          pkg_file="$PWD/${pkgname}-${pkgver}-${pkgrel}-${pkgarch}.pkg.tar.zst"
+          tar -C "$pkgdir" -c --zstd -f "$pkg_file" .
+          echo "PKG_FILE=$pkg_file" >> "$GITHUB_ENV"
 
       - name: Publish to Gitea Registry
         run: |
-          pkg_file=$(find $PWD/packaging/arch -name "*.pkg.tar.zst" -type f | head -1)
           curl --fail-with-body \
             --user "${{ github.repository_owner }}:${{ secrets.ACCESS_TOKEN }}" \
-            --upload-file "$pkg_file" \
+            --upload-file "$PKG_FILE" \
             "${{ github.server_url }}/api/packages/${{ github.repository_owner }}/arch/push"