Add tag‑based weekly scheduled incremental CI builds

.github/workflows/build.yml

@@ -18,6 +18,15 @@ on:
 
   # Allow this workflow to be called as a reusable workflow
   workflow_call:
+    inputs:
+      commit_range_start:
+        description: 'The start commit of the range to check for incremental builds.'
+        type: string
+        required: false
+      commit_range_end:
+        description: 'The end commit of the range to check for incremental builds.'
+        type: string
+        required: false
 
 env:
   DOTNET_VERSION: ${{ '9.0.x' }}
@@ -46,6 +55,9 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: recursive
+          ref: ${{ inputs.commit_range_end || github.sha }}
+          fetch-depth: 0
+          fetch-tags: true
 
       # Restore Tools from Manifest list in the Repository
       - name: Restore dotnet tools
@@ -84,11 +96,13 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: recursive
+          ref: ${{ inputs.commit_range_end || github.sha }}
           fetch-depth: 0
+          fetch-tags: true
 
       - name: Get changed components
         run: |
-          $changedComponents = $(./tooling/Get-Changed-Components.ps1 ${{ github.event.before }} ${{ github.event.after }})
+          $changedComponents = $(./tooling/Get-Changed-Components.ps1 ${{ inputs.commit_range_start || github.event.before }} ${{ inputs.commit_range_end || github.event.after }})
           $buildableChangedComponents = $(./tooling/MultiTarget/Filter-Supported-Components.ps1 -Components $changedComponents -MultiTargets ${{ matrix.multitarget }} -WinUIMajorVersion ${{ matrix.winui }})
           echo "CHANGED_COMPONENTS_LIST=$(($buildableChangedComponents | ForEach-Object { "$_" }) -join ',')" >> $env:GITHUB_ENV
           echo "HAS_BUILDABLE_COMPONENTS=$($buildableChangedComponents.Count -gt 0)" >> $env:GITHUB_ENV
@@ -248,7 +262,9 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: recursive
+          ref: ${{ inputs.commit_range_end || github.sha }}
           fetch-depth: 0
+          fetch-tags: true
 
       - name: Format Date/Time of Commit for Package Version
         run: |
@@ -275,7 +291,7 @@ jobs:
             # Get changed components
       - name: Get changed components
         run: |
-          $changedComponents = $(./tooling/Get-Changed-Components.ps1 ${{ github.event.before }} ${{ github.event.after }})
+          $changedComponents = $(./tooling/Get-Changed-Components.ps1 ${{ inputs.commit_range_start || github.event.before }} ${{ inputs.commit_range_end || github.event.after }})
           $buildableChangedComponents = $(./tooling/MultiTarget/Filter-Supported-Components.ps1 -Components $changedComponents -MultiTargets "all" -WinUIMajorVersion ${{ matrix.winui }})
           echo "CHANGED_COMPONENTS_LIST=$(($buildableChangedComponents | ForEach-Object { "$_" }) -join ',')" >> $env:GITHUB_ENV
           echo "HAS_BUILDABLE_COMPONENTS=$($buildableChangedComponents.Count -gt 0)" >> $env:GITHUB_ENV
@@ -440,6 +456,9 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: recursive
+          ref: ${{ inputs.commit_range_end || github.sha }}
+          fetch-depth: 0
+          fetch-tags: true
 
       # Restore Tools from Manifest list in the Repository
       - name: Restore dotnet tools

.github/workflows/scheduled-releases.yml

@@ -9,10 +9,13 @@ on:
   workflow_dispatch:
 
 jobs:
-  merge-weekly:
+  tag-weekly-release:
     runs-on: ubuntu-latest
     permissions:
       contents: write
+    outputs:
+      commit_range_start: ${{ steps.range.outputs.commit_range_start }}
+      commit_range_end: ${{ steps.range.outputs.commit_range_end }}
 
     steps:
       - name: Checkout repository
@@ -26,17 +29,43 @@ jobs:
         run: |
           git config user.name 'github-actions[bot]'
           git config user.email 'github-actions[bot]@users.noreply.github.com'
+
+      - name: Create tag
+        id: create-tag
+        run: |
+          # Date in the format YYMMDD
+          TAG="release/weekly/$(date +%y%m%d)"
+          git tag -a "$TAG" -m "Release $TAG"
+          git push origin "$TAG"
+          echo "TAG=$TAG" >> $GITHUB_OUTPUT
 
-      - name: Merge main into rel/weekly
+      - name: Determine commit range
+        id: range
         run: |
-          git fetch origin
-          git checkout rel/weekly
-          git reset --hard origin/rel/weekly
-          git merge --ff-only origin/main -m "Weekly merge of main into rel/weekly"
-          git push origin rel/weekly
+          # New tag we just created
+          NEW_TAG=${{ steps.create-tag.outputs.TAG }}
+
+          # Find the previous tag (sorted newest‑first)
+          PREV_TAG=$(git tag --list "release/weekly/*" --sort=-creatordate | sed -n '2p')
+
+          # If we’re on the very first tag, fall back to main
+          if [ -z "$PREV_TAG" ]; then
+            PREV_TAG=main
+          fi
+
+          # Resolve the commit hashes
+          START_COMMIT=$(git rev-parse "$PREV_TAG")
+          END_COMMIT=$(git rev-parse "$NEW_TAG")
+
+          # Export them as workflow outputs
+          echo "commit_range_start=$START_COMMIT" >> $GITHUB_OUTPUT
+          echo "commit_range_end=$END_COMMIT" >> $GITHUB_OUTPUT
 
-  # Then trigger the build workflow on the updated rel/weekly branch
+  # Then trigger the build workflow with the commit range.
   trigger-build:
-    needs: merge-weekly
-    uses: CommunityToolkit/Labs-Windows/.github/workflows/build.yml@rel/weekly
-    secrets: inherit
+    needs: tag-weekly-release
+    uses: ./.github/workflows/build.yml
+    with:
+      commit_range_start: ${{ needs.tag-weekly-release.outputs.commit_range_start }}
+      commit_range_end: ${{ needs.tag-weekly-release.outputs.commit_range_end }}
+    secrets: inherit