chore: add RC releases

Author: grdsdev

.github/workflows/release.yml

@@ -1,3 +1,5 @@
+name: Release
+
 on:
   push:
     branches:
@@ -8,12 +10,100 @@ permissions:
   contents: write
   pull-requests: write
 
-name: release-please
-
 jobs:
   release-please:
     runs-on: ubuntu-latest
     steps:
       - uses: googleapis/release-please-action@v4
+        id: release
         with:
           target-branch: ${{ github.ref_name }}
+        
+      - uses: actions/checkout@v4
+        if: ${{ steps.release.outputs.release_created == 'true' || steps.release.outputs.prs_created == 'true' }}
+        with:
+          fetch-depth: 0
+
+      - if: ${{ steps.release.outputs }}
+        id: versions
+        run: |
+          set -ex
+
+          RELEASE_CANDIDATE=true
+          NOT_RELEASE_CANDIDATE='${{ steps.release.outputs.release_created }}'
+          if [ "$NOT_RELEASE_CANDIDATE" = "true" ]; then
+            RELEASE_CANDIDATE=false
+          fi
+
+          MAIN_RELEASE_VERSION=x
+          RELEASE_VERSION=y
+
+          if [ "$RELEASE_CANDIDATE" = "true" ]; then
+            # Release please doesn't tell you the candidate version when it
+            # creates the PR, so we have to take it from the title.
+            MAIN_RELEASE_VERSION=$(node -e "console.log('${{ steps.release.outputs.pr && fromJSON(steps.release.outputs.pr).title }}'.split(' ').reverse().find(x => x.match(/[0-9]+[.][0-9]+[.][0-9]+/)))")
+
+            # Use git describe tags to identify the number of commits the branch
+            # is ahead of the most recent non-release-candidate tag, which is
+            # part of the rc.<commit> value.
+            RELEASE_VERSION=$MAIN_RELEASE_VERSION-rc.$(node -e "console.log('$(git describe --tags --exclude rc*)'.split('-')[1])")
+
+            # release-please only ignores releases that have a form like [A-Z0-9]<version>, so prefixing with rc<version>
+            RELEASE_NAME="rc$RELEASE_VERSION"
+          else
+            MAIN_RELEASE_VERSION=${{ steps.release.outputs.major }}.${{ steps.release.outputs.minor }}.${{ steps.release.outputs.patch }}
+            RELEASE_VERSION="$MAIN_RELEASE_VERSION"
+            RELEASE_NAME="v$RELEASE_VERSION"
+          fi
+          
+          # Set environment variables
+          {
+            echo "MAIN_RELEASE_VERSION=${MAIN_RELEASE_VERSION}"
+            echo "RELEASE_VERSION=${RELEASE_VERSION}"
+            echo "RELEASE_CANDIDATE=${RELEASE_CANDIDATE}"
+            echo "RELEASE_NAME=${RELEASE_NAME}"
+          } >> "${GITHUB_ENV}"
+
+          # Set step outputs
+          {
+            echo "MAIN_RELEASE_VERSION=${MAIN_RELEASE_VERSION}"
+            echo "RELEASE_VERSION=${RELEASE_VERSION}"
+            echo "RELEASE_CANDIDATE=${RELEASE_CANDIDATE}"
+            echo "RELEASE_NAME=${RELEASE_NAME}"
+          } >> "${GITHUB_OUTPUT}"
+
+      - name: Create GitHub release and branches
+        if: ${{ steps.release.outputs.release_created == 'true' || steps.release.outputs.prs_created == 'true' }}
+        run: |
+          set -ex
+
+          if [ "$RELEASE_CANDIDATE" = "true" ]; then
+            PR_NUMBER='${{ steps.release.outputs.pr && fromJSON(steps.release.outputs.pr).number }}'
+            
+            # Create release candidate
+            GH_TOKEN='${{ secrets.GITHUB_TOKEN }}' gh release \
+              create "$RELEASE_NAME" \
+              --title "v$RELEASE_VERSION" \
+              --prerelease \
+              -n "This is a release candidate. See release-please PR #$PR_NUMBER for context."
+
+            # Comment on PR
+            GH_TOKEN='${{ secrets.GITHUB_TOKEN }}' gh pr comment "$PR_NUMBER" \
+              -b "Release candidate [v$RELEASE_VERSION](https://github.com/supabase/supabase-swift/releases/tag/$RELEASE_NAME) published."
+          else
+            if [ "$GITHUB_REF" == "refs/heads/main" ] || [ "$GITHUB_REF" == "refs/heads/master" ]; then
+              IS_PATCH_ZERO=$(node -e "console.log('$RELEASE_VERSION'.endsWith('.0'))")
+
+              if [ "$IS_PATCH_ZERO" == "true" ]; then
+                # Only create release branch if patch version is 0, as this
+                # means that the release can be patched in the future.
+                GH_TOKEN='${{ secrets.GITHUB_TOKEN }}' gh api \
+                  --method POST \
+                  -H "Accept: application/vnd.github+json" \
+                  -H "X-GitHub-Api-Version: 2022-11-28" \
+                  /repos/supabase/supabase-swift/git/refs \
+                  -f "ref=refs/heads/release/${RELEASE_VERSION}" \
+                  -f "sha=$GITHUB_SHA"
+              fi
+            fi
+          fi