Make the release-publish workflow dispatch-triggered (#216)

.github/workflows/release-publish.yml

@@ -1,10 +1,23 @@
-name: Release
+name: Release & Publish
 
 on:
-  push:
-    tags:
-      - 'v[0-9]+.[0-9]+.[0-9]+'
-      - 'v[0-9]+.[0-9]+.[0-9]+-*'
+  workflow_dispatch:
+    inputs:
+      git_ref:
+        description: 'Git ref'
+        type: string
+        required: false
+        default: 'main'
+      semver:
+        description: 'Semantic Version (empty defaults to 0.0.0-commit)'
+        type: string
+        required: false
+        default: ''
+      publish_nuget:
+        description: 'Publish NuGet package'
+        type: boolean
+        required: false
+        default: false
 
 jobs:
   build-and-publish:
@@ -13,23 +26,30 @@ jobs:
     timeout-minutes: 15
     permissions:
       contents:
-        write # Create release
+        write # Create tag and release
 
     steps:
     - uses: actions/checkout@v3
-    - uses: ./.github/actions/setup-swift
+      with:
+        ref: ${{ github.event.inputs.git_ref }}
 
     - name: Compute Version
-      id: version
+      id: context
       shell: pwsh
       run: |
-        $TagName = "${{ github.ref_name }}"
-        if ($TagName.StartsWith("v")) { $SemVer = $TagName.Substring(1) }
-        else {
-          $CommitHash = "${{ github.sha }}".Substring(0, 7)
-          $SemVer = "0.0.0-$CommitHash"
+        $SemVer = "${{ github.event.inputs.semver }}"
+        if ($SemVer -eq "") {
+          $Commit = & git rev-parse --short=8 | Out-String
+          $SemVer = "0.0.0-$Commit"
+        }
+        if (-not $SemVer -matches "^v\d+\.\d+\.\d+(-\w+)?$") {
+          throw "Unexpected SemVer format: $SemVer"
         }
-        echo "::set-output name=semver::$SemVer"
+
+        Write-Output "::set-output name=tag::v$SemVer"
+        Write-Output "::set-output name=semver::$SemVer"
+
+    - uses: ./.github/actions/setup-swift
 
     - name: CMake Configure
       working-directory: Generator
@@ -48,19 +68,25 @@ jobs:
         $OutputPath = "${{ github.workspace }}\SwiftWinRT.nupkg"
         & .\Create-NuGetPackage.ps1 `
           -NativeExe "build\release\Sources\SwiftWinRT\SwiftWinRT.exe" `
-           -Version "${{ steps.version.outputs.semver }}" `
+           -Version "${{ steps.context.outputs.semver }}" `
           -OutputPath $OutputPath
         (Get-FileHash $OutputPath).Hash | Out-File -FilePath "$OutputPath.sha256"
 
+    - name: Create Git Tag
+      shell: pwsh
+      run: |
+        & git tag "${{ steps.context.outputs.tag }}"
+        & git push origin "${{ steps.context.outputs.tag }}"
+
     - name: Create GitHub Release
       if: github.event_name == 'push'
       shell: pwsh
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       run: |
         # Create Release
-        $TagName = "${{ github.ref_name }}"
-        $SemVer = "${{ steps.version.outputs.semver }}"
+        $SemVer = "${{ steps.context.outputs.semver }}"
+        $TagName = "${{ steps.context.outputs.tag }}"
         $RepositoryUrl = "${{ github.repository }}"
         $ExtraArgs = @()
         if ($SemVer.StartsWith("0.") -or $SemVer.Contains("-")) { $ExtraArgs += "--prerelease" }