ci: allow prerelease branch releases (#1647)

Author: hassiebp

.github/workflows/release.yml

@@ -45,14 +45,40 @@ jobs:
     runs-on: ubuntu-latest
     environment: protected branches
     steps:
-      - name: Verify branch
+      - name: Verify release ref
         run: |
-          if [ "${GITHUB_REF}" != "refs/heads/main" ]; then
-            echo "❌ Error: Releases can only be triggered from main branch"
+          if [ "${GITHUB_REF_TYPE}" != "branch" ]; then
+            echo "❌ Error: Releases can only be triggered from branches"
             echo "Current ref: ${GITHUB_REF}"
             exit 1
           fi
 
+          if [ "${GITHUB_REF_NAME}" = "main" ]; then
+            echo "✅ Official and pre-release releases are allowed from main"
+            exit 0
+          fi
+
+          case "${INPUTS_VERSION}" in
+            prepatch|preminor|premajor)
+              ;;
+            *)
+              echo "❌ Error: Official releases can only be triggered from main branch"
+              echo "Current branch: ${GITHUB_REF_NAME}"
+              echo "Requested version bump: ${INPUTS_VERSION}"
+              exit 1
+              ;;
+          esac
+
+          if [ -z "${INPUTS_PRERELEASE_TYPE}" ]; then
+            echo "❌ Error: Branch releases must specify prerelease_type as alpha, beta, or rc"
+            exit 1
+          fi
+
+          echo "✅ Pre-release branch release allowed from ${GITHUB_REF_NAME}"
+        env:
+          INPUTS_VERSION: ${{ inputs.version }}
+          INPUTS_PRERELEASE_TYPE: ${{ inputs.prerelease_type }}
+
       - name: Confirm major release
         if: ${{ inputs.version == 'major' || inputs.version == 'premajor' }}
         run: |
@@ -294,7 +320,7 @@ jobs:
         id: push-tag
         run: |
           git tag "v${STEPS_NEW_VERSION_OUTPUTS_VERSION}"
-          git push origin main
+          git push origin "HEAD:${GITHUB_REF_NAME}"
           git push origin "v${STEPS_NEW_VERSION_OUTPUTS_VERSION}"
         env:
           STEPS_NEW_VERSION_OUTPUTS_VERSION: ${{ steps.new-version.outputs.version }}