workflows: add automated nightly releases for snapshots

.github/workflows/_job_upload.yml

@@ -0,0 +1,39 @@
+name: _job_upload
+
+on:
+  workflow_call:
+    inputs:
+      version:
+        required: true
+        type: string
+      name:
+        required: true
+        type: string
+
+jobs:
+  upload:
+    name: Upload ${{ inputs.name }}
+    strategy:
+      matrix:
+        include:
+          - file: ${{ inputs.name }}.tar.xz
+          - file: ${{ inputs.name }}.sha512sum
+    runs-on: ubuntu-slim
+    steps:
+
+      - name: Download ${{ matrix.file }} artifact
+        uses: actions/download-artifact@v8
+        with:
+          name: ${{ matrix.file }}
+
+      - name: Upload ${{ matrix.file }} to release
+        shell: bash
+        run: >-
+          gh
+          --repo "${{ github.server_url }}/${{ github.repository }}"
+          release upload
+          ${{ inputs.version }}
+          ${{ matrix.file }}
+          --clobber
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/snapshot.yml

@@ -31,11 +31,11 @@ jobs:
       id: version
       shell: bash
       run: |
-        tag_abbrev=$(git describe --tags --abbrev=0)
+        tag_abbrev=$(git describe --tags --exclude '*nightly*' --abbrev=0)
         echo "tag_abbrev=$tag_abbrev" >> $GITHUB_OUTPUT
         echo "tag_offset=$(git rev-list $tag_abbrev..HEAD --count)" >> $GITHUB_OUTPUT
         echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
-        echo "full_desc=$(git describe --long --tags)" >> $GITHUB_OUTPUT
+        echo "full_desc=$(git describe --long --tags --exclude '*nightly*')" >> $GITHUB_OUTPUT
         echo "branch=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}" >> $GITHUB_OUTPUT
 
   build:
@@ -74,4 +74,64 @@ jobs:
     with:
       name: ${{ matrix.name }}
       runner: ${{ matrix.runner != '' && matrix.runner || 'ubuntu-24.04' }}
-      continue: true
+      continue: false
+
+  nightly:
+    name: Nightly
+    needs: [version, build, test]
+    runs-on: ubuntu-slim
+    outputs:
+      title: ${{ steps.title.outputs.title }}
+    steps:
+    - uses: actions/checkout@v6
+      with:
+        fetch-depth: 0
+        fetch-tags: true
+    - name: Title
+      id: title
+      shell: bash
+      run: |
+        git fetch origin +refs/tags/*:refs/tags/*
+        python -c "v='${{ needs.version.outputs.full_desc }}'.split('-');print('title='+'-'.join([v[0],v[1],'nightly']))" >> "$GITHUB_OUTPUT"
+    - name: Delete
+      id: delete
+      shell: bash
+      run: >-
+        gh
+        release delete
+        ${{ steps.title.outputs.title }}
+        --cleanup-tag
+        --yes
+        || true
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    - name: Create
+      id: create
+      shell: bash
+      run: >-
+        gh
+        release create
+        ${{ steps.title.outputs.title }}
+        --prerelease
+        --latest=false
+        --title "Development ${{ steps.title.outputs.title }}"
+        --notes "Version: ${{ needs.version.outputs.full_desc }}"
+        --notes-file ./NIGHTLY_NOTES.md
+        --generate-notes
+        --notes-start-tag ${{ needs.version.outputs.tag_abbrev }}
+        --target ${{ github.ref_name }}
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  upload:
+    name: Upload
+    needs: [version, nightly]
+    strategy:
+      matrix:
+        include:
+          - name: proton-${{ needs.version.outputs.full_desc }}-x86_64
+          - name: proton-${{ needs.version.outputs.full_desc }}-arm64
+    uses: ./.github/workflows/_job_upload.yml
+    with:
+      version: ${{ needs.nightly.outputs.title }}
+      name: ${{ matrix.name }}