Allow passing tags between actions

Add the tag name as an output from the release prep stage, and allow it
to be provided as an input to the release stage, so the tag can be
passed from one to the next without relying on an action being
triggered.

Author: me-and

.github/workflows/prep-release.yml

@@ -22,6 +22,10 @@ on:
         required: false
         type: boolean
         default: false
+    outputs:
+      release_tag:
+        description: Name of the release tag
+        value: ${{ jobs.prep-release.outputs.tag }}
 
 permissions:
   contents: write
@@ -33,6 +37,8 @@ jobs:
     env:
       CYGPORT_FILE: ${{ inputs.cygport_file }}
       REQUESTED_TAG: ${{ inputs.release_tag }}
+    outputs:
+      tag: ${{ steps.tag-name.outputs.tag }}
 
     steps:
 
@@ -125,11 +131,12 @@ jobs:
           exit 1
 
       - name: Check tag name
+        id: tag-name
         run: |
           if ($Env:REQUESTED_TAG -eq "") {
-            Write-Output "TAG=v$Env:CYGPORT_PVR" | Tee-Object -FilePath $Env:GITHUB_ENV
+            Write-Output "tag=v$Env:CYGPORT_PVR" | Tee-Object -FilePath $Env:GITHUB_OUTPUT
           } elseif ($Env:REQUESTED_TAG.StartsWith("v$Env:CYGPORT_PVR")) {
-            Write-Output "TAG=$Env:REQUESTED_TAG" | Tee-Object -FilePath $Env:GITHUB_ENV
+            Write-Output "tag=$Env:REQUESTED_TAG" | Tee-Object -FilePath $Env:GITHUB_OUTPUT
           } else {
             Write-Output "::error title=Bad tag::Requested tag $Env:REQUESTED_TAG not prefixed by v$Env:CYGPORT_PVR"
             exit 1
@@ -144,11 +151,11 @@ jobs:
       - name: Create GitHub Release
         uses: softprops/action-gh-release@v1
         with:
-          tag_name: ${{ env.TAG }}
+          tag_name: ${{ steps.tag-name.outputs.tag }}
           draft: ${{ ! inputs.publish }}
           files: |
             ${{ env.CYGPORT_PF }}.${{ env.CYGPORT_ARCH }}/dist/${{ env.CYGPORT_NAME }}/*
             ${{ env.CYGPORT_PF }}.${{ env.CYGPORT_ARCH }}/dist/${{ env.CYGPORT_NAME }}/*/*
           fail_on_unmatched_files: true
           target_commitish: ${{ github.ref }}
-          body: ${{ env.TAG }}
+          body: ${{ steps.tag-name.outputs.tag }}

.github/workflows/release.yml

@@ -12,6 +12,10 @@ on:
         required: false
         type: string
         default: cygport
+      tag_name:
+        description: Name of the tag for the release
+        required: true
+        type: string
     secrets:
       maintainer_key:
         description: RSA private key for uploading to Cygwin servers in OpenSSH format
@@ -104,17 +108,24 @@ jobs:
       - name: Get the release target branch
         id: target
         uses: actions/github-script@v6
+        env:
+          TAG_NAME: ${{ inputs.tag_name }}
         with:
           script: |
-            const target_commitish = context.payload.release.target_commitish;
-            if (target_commitish.startsWith('refs/heads/')) {
-              target_ref = target_commitish.substring(11);
+            const releaseRsp = await github.rest.repos.getReleaseByTag({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              tag: process.env.TAG_NAME
+            });
+            const targetCommitish = releaseRsp.data.target_commitish;
+            if (targetCommitish.startsWith('refs/heads/')) {
+              targetRef = targetCommitish.substring(11);
             } else if (target_commitish.startsWith('refs/tags/')) {
-              target_ref = target.commitish.substring(10);
+              targetRef = targetCommitish.substring(10);
             } else {
-              core.setFailed('Unexpected target_commitish: ' + target_commitish);
+              core.setFailed('Unexpected target_commitish: ' + targetCommitish);
             }
-            core.setOutput('target_ref', target_ref);
+            core.setOutput('target_ref', targetRef);
 
       - name: Get build cache
         id: build-cache
@@ -183,7 +194,7 @@ jobs:
 
       - name: Mirror to the Cygwin Git repositories
         env:
-          TAG_NAME: ${{ github.event.release.tag_name }}
+          TAG_NAME: ${{ inputs.tag_name }}
         run: git push "[email protected]:/git/cygwin-packages/$Env:CYGPORT_NAME" tag "$Env:TAG_NAME"
 
       - name: Remove maintainer key