Add file-update.yml to CI scripts.

Author: mawosoft

CI/file-update.yml

@@ -0,0 +1,64 @@
+name: Update Single File Dependencies
+
+on:
+  workflow_dispatch:
+  schedule:
+  - cron: '0 0 * * 0'
+
+defaults:
+  run:
+    shell: pwsh
+
+env:
+  DOTNET_NOLOGO: true
+  DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
+  DOTNET_CLI_TELEMETRY_OPTOUT: true
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  Update:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        show-progress: false
+        fetch-depth: 1
+    - name: Update
+      # Both must be set because dotnet-file internally calls gh cli to fetch the changelog.
+      env:
+        GCM_CREDENTIAL_STORE: cache
+        GH_TOKEN: ${{ github.token }}
+      id: update
+      run: |
+        dotnet tool update -g dotnet-file
+
+        [string]$tmpfile = New-TemporaryFile
+        dotnet-file update "-c:$tmpfile"
+
+        [string]$content = Get-Content $tmpfile -Raw
+        if (-not $content) {
+          'No changelog.'
+        }
+        else {
+          Write-Output 'Changelog<<EOF' >>$env:GITHUB_OUTPUT
+          Write-Output $content >>$env:GITHUB_OUTPUT
+          Write-Output 'EOF' >>$env:GITHUB_OUTPUT
+          $content
+        }
+    - name: Pull Request
+      uses: peter-evans/create-pull-request@v5
+      with:
+        base: master
+        branch: dotnet-file-sync
+        delete-branch: true
+        labels: dependencies
+        title: Update Single File Dependencies
+        body: ${{ steps.update.outputs.Changelog }}
+        commit-message: |
+          Update Single File Dependencies
+
+          ${{ steps.sync.outputs.Changelog }}