Add Port PR workflow

Signed-off-by: Phillip Rak <[email protected]>

.github/workflows/port-pr.yaml

@@ -0,0 +1,117 @@
+name: Port PR
+
+on:
+  issue_comment:
+    types:
+      - created
+
+jobs:
+  port-pr:
+    runs-on: ubuntu-latest
+    if: (startsWith(github.event.comment.body, '/backport') || startsWith(github.event.comment.body, '/forwardport')) && github.event.issue.pull_request
+    steps:
+      - name: Check org membership
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          if gh api orgs/${GITHUB_REPOSITORY_OWNER}/members --paginate | jq -e --arg GITHUB_ACTOR "$GITHUB_ACTOR" '.[] | select(.login == $GITHUB_ACTOR)' > /dev/null; then
+              echo "${GITHUB_ACTOR} is a member"
+              echo "is_member=true" >> $GITHUB_ENV
+          else
+              echo "${GITHUB_ACTOR} is not a member" >> $GITHUB_STEP_SUMMARY
+              echo "is_member=false" >> $GITHUB_ENV
+          fi
+      - name: Check milestone
+        if: ${{ env.is_member == 'true' }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ORIGINAL_ISSUE_NUMBER: ${{ github.event.issue.number }}
+          COMMENT_BODY: ${{ github.event.comment.body }}
+        run: |
+          BODY_MILESTONE=$(echo "${COMMENT_BODY}" | awk '{ print $2 }')
+          # Sanitize input
+          MILESTONE=${BODY_MILESTONE//[^a-zA-Z0-9\-\.]/}
+          if gh api repos/${GITHUB_REPOSITORY}/milestones --paginate | jq -e --arg MILESTONE "$MILESTONE" '.[] | select(.title == $MILESTONE)' > /dev/null; then
+              echo "Milestone exists"
+              echo "milestone_exists=true" >> $GITHUB_ENV
+              echo "milestone=${MILESTONE}" >> $GITHUB_ENV
+           else
+              echo "Milestone ${MILESTONE} does not exist" >> $GITHUB_STEP_SUMMARY
+              gh issue comment -R ${GITHUB_REPOSITORY} ${ORIGINAL_ISSUE_NUMBER} --body "Not creating port issue, milestone ${MILESTONE} does not exist or is not an open milestone"
+              echo "milestone_exists=false" >> $GITHUB_ENV
+           fi
+      - name: Get target branch
+        if: ${{ env.is_member == 'true' }} && ${{ env.milestone_exists == 'true' }}
+        env:
+          COMMENT_BODY: ${{ github.event.comment.body }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          TYPE=$(echo "${COMMENT_BODY}" | awk '{ print $1 }' | sed -e 's_/__')
+          echo "Type: ${TYPE}" >> $GITHUB_STEP_SUMMARY
+          echo "type=${TYPE}" >> $GITHUB_ENV
+          TARGET_BRANCH=$(echo "${COMMENT_BODY}" | awk '{ print $3 }')
+          echo "Target brach: ${TARGET_BRANCH}" >> $GITHUB_STEP_SUMMARY
+          echo "target_branch=${TARGET_BRANCH}" >> $GITHUB_ENV
+          if gh api repos/${GITHUB_REPOSITORY}/branches --paginate | jq -e --arg TARGET_BRANCH "$TARGET_BRANCH" '.[] | select(.name == $TARGET_BRANCH)' > /dev/null; then
+              echo "target_branch_exists=true" >> $GITHUB_ENV
+          else
+              echo "target_branch_exists=false" >> $GITHUB_ENV
+          fi
+      - name: Checkout
+        if: ${{ env.is_member == 'true' }} && ${{ env.milestone_exists == 'true' }} && ${{ env.target_branch_exists == 'true' }}
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ env.target_branch }}
+          fetch-depth: '0'
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Port PR
+        if: ${{ env.is_member == 'true' }} && ${{ env.milestone_exists == 'true' }} && ${{ env.target_branch_exists == 'true' }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ORIGINAL_ISSUE_NUMBER: ${{ github.event.issue.number }}
+          TYPE: ${{ env.type }}
+          TARGET_BRANCH: ${{ env.target_branch }}
+          MILESTONE: ${{ env.milestone }}
+        run: |
+          PATCH_FILE=$(mktemp)
+          gh pr diff $ORIGINAL_ISSUE_NUMBER --patch > $PATCH_FILE
+          BRANCH="gha-portpr-${GITHUB_RUN_ID}-${GITHUB_RUN_ATTEMPT}"
+          echo "branch=${BRANCH}" >> $GITHUB_ENV
+          git config --global user.email "[email protected]"
+          git config --global user.name "Rancher Dashboard Port Bot"
+          git checkout -b $BRANCH
+
+          if ! git am -3 "$PATCH_FILE" > error.log 2>&1; then
+              ERROR_MESSAGE=$(cat error.log)
+              FORMATTED_ERROR_MESSAGE=$(printf "\n\`\`\`\n%s\n\`\`\`" "$ERROR_MESSAGE")
+              gh issue comment ${ORIGINAL_ISSUE_NUMBER} --body "Not creating port PR, there was an error running git am -3: $FORMATTED_ERROR_MESSAGE"
+          else
+              git push origin $BRANCH
+              ORIGINAL_PR=$(gh pr view ${ORIGINAL_ISSUE_NUMBER} --json title,body,assignees)
+              ORIGINAL_TITLE=$(echo "${ORIGINAL_PR}" | jq -r .title)
+              ORIGINAL_ASSIGNEE=$(echo "${ORIGINAL_PR}" | jq -r '.assignee.login // empty')
+              BODY=$(mktemp)
+              echo -e "This is an automated request to port PR #${ORIGINAL_ISSUE_NUMBER} by @${GITHUB_ACTOR}\n\n" > $BODY
+              echo -e "Original PR body:\n\n" >> $BODY
+              echo "${ORIGINAL_PR}" | jq -r .body >> $BODY
+              ASSIGNEES=$(echo "${ORIGINAL_PR}" | jq -r .assignees[].login)
+              if [ -n "$ASSIGNEES" ]; then
+                  echo "Checking if assignee is member before assigning"
+                  DELIMITER=""
+                  NEW_ASSIGNEES=""
+                  for ASSIGNEE in $ASSIGNEES; do
+                      if gh api orgs/${GITHUB_REPOSITORY_OWNER}/members --paginate | jq -e --arg GITHUB_ACTOR "$GITHUB_ACTOR" '.[] | select(.login == $GITHUB_ACTOR)' > /dev/null; then
+                          echo "${ASSIGNEE} is a member, adding to assignees"
+                          NEW_ASSIGNEES="${NEW_ASSIGNEES}${DELIMITER}${ASSIGNEE}"
+                          DELIMITER=","
+                      fi
+                  done
+                  if [ -n "$NEW_ASSIGNEES" ]; then
+                      echo "Assignees for new issue: ${NEW_ASSIGNEES}"
+                      additional_cmd+=("--assignee")
+                      additional_cmd+=("${NEW_ASSIGNEES}")
+                  fi
+              fi
+              NEW_PR=$(gh pr create --title="[${TYPE} ${MILESTONE}] ${ORIGINAL_TITLE}" --body-file="${BODY}" --head "${BRANCH}" --base "${TARGET_BRANCH}" --milestone "${MILESTONE}" "${additional_cmd[@]}")
+              echo "Port PR created: ${NEW_PR}" >> $GITHUB_STEP_SUMMARY
+          fi