initial commit

README.md

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+# Test and Mirror AUR Packages
+
+This action tests that building a package succeeds and then mirrors any changes to the AUR.
+
+## Example
+
+```yaml
+jobs:
+  mirror:
+    runs-on: ubuntu-latest
+	steps:
+	  - uses: actions/checkout@v3
+	    with:
+		  fetch-depth: 0
+	  - uses: https://msrd0.dev/aur/.mirror@main
+	    with:
+		  ssh_key: ${{secrets.ssh_key}}
+```

action.yml

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+name: 'Mirror'
+description: 'Test and Mirror AUR Packages'
+
+inputs:
+  pkgbase:
+    description: 'The pkgbase from the AUR.'
+    required: false
+  ssh_key:
+    description: 'The base64-part of the private key to upload to the AUR.'
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - name: Pull up2date ArchLinux image
+      run: docker pull docker.io/library/archlinux:base-devel
+
+    - name: Test AUR package
+      uses: docker://docker.io/library/archlinux:base-devel
+      with:
+        entrypoint: makepkg
+        args: -s
+    
+    - name: Ensure .SRCINFO is up to date
+      uses: docker://docker.io/library/archlinux:base-devel
+      with:
+        entrypoint: bash
+        args: -c 'makepkg --printsrcinfo >>.SRCINFO.new && diff -u .SRCINFO{,.new}'
+    
+    - name: Mirror to the AUR
+      run: |
+        printf '%s' '${{inputs.ssh_key}}' >ssh_key
+        echo 'aur.archlinux.org ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEuBKrPzbawxA/k2g6NcyV5jmqwJ2s+zpgZGZ7tpLIcN' >>~/.ssh/known_hosts
+
+        pkgbase='${{inputs.pkgbase}}'
+        [ -n "$pkgbase" ] || pkgbase="$( (. PKGBUILD && printf '%s' "$pkgbase") )"
+        [ -n "$pkgbase" ] || pkgbase="$( (. PKGBUILD && printf '%s' "$pkgname") )"
+
+        [ -n "$pkgbase" ] || \
+          ( echo "Failed to determine pkgbase"; exit 1 )
+        [ "${{github.ref_name}}" == "main" ] || [ "${{github.ref_name}}" == "master" ] || \
+          ( echo "Git ref is neither main nor master, aborting"; exit 1 ) || exit 0
+
+        export GIT_SSH_COMMAND='ssh -i ssh_key -o IdentitiesOnly=yes'
+        git remote add aur "ssh://aur@aur.archlinux.org/$pkgbase.git"
+        git push aur "${{github.ref_name}}:master"