message: build: add support for the "merge-assistance" label in merge-pr
  fixes
  PR Close
diff: @@ -49,7 +49,6 @@ else
  GHCURL="curl -H \"Authorization: token $TOKEN\""
  fi
  -CURRENT_BRANCH=`git rev-parse --abbrev-ref HEAD`
  PULL_JSON=`$GHCURL -s https://api.github.com/repos/angular/angular/pulls/$PR_NUMBER`
  PR_SHA_COUNT=`node $BASEDIR/utils/json_extract.js commits <<< """$PULL_JSON"""`
  STATUS_JSON_URL=`node $BASEDIR/utils/json_extract.js _links.statuses.href <<< """$PULL_JSON"""`
  @@ -59,10 +58,9 @@ PR_ACTION=`echo "$PR_LABELS" | node $BASEDIR/utils/json_extract.js "name=^PR act
  PR_TARGET=`echo "$PR_LABELS" | node $BASEDIR/utils/json_extract.js "name=^PR target:"`
  PR_CLA=`echo "$PR_LABELS" | node $BASEDIR/utils/json_extract.js "name=^cla"`
  MASTER_BRANCH='master'
  -PATCH_BRANCH=`git ls-remote --heads git@github.com:angular/angular.git | grep -E 'refs\/heads\/[0-9]+\.[0-9]+\.x' | cut -d '/' -f3 | sort -r | head -n1`
  -if [[ "$PR_ACTION" != "PR action: merge" ]]; then
  - echo The PR is missing 'PR action: merge' label, found: $PR_ACTION
  +if [[ ! "$PR_ACTION" =~ "PR action: merge" ]]; then
  + echo The PR is missing 'PR action: merge(-assistance)' label, found: $PR_ACTION
  exit 1
  fi
  @@ -95,16 +93,19 @@ else
  exit 1;
  fi
  +CURRENT_BRANCH=`git rev-parse --abbrev-ref HEAD`
  +PATCH_BRANCH=`git ls-remote --heads git@github.com:angular/angular.git | grep -E 'refs\/heads\/[0-9]+\.[0-9]+\.x' | cut -d '/' -f3 | sort -r | head -n1`
  CHECKOUT_MASTER="git checkout merge_pr_master"
  CHECKOUT_PATCH="git checkout merge_pr_patch"
  RESTORE_BRANCH="git checkout $CURRENT_BRANCH"
  +
  FETCH_PR="git fetch git@github.com:angular/angular.git pull/$PR_NUMBER/head:merge_pr heads/master:merge_pr_master heads/$PATCH_BRANCH:merge_pr_patch -f"
  BASE_PR="git checkout merge_pr~$PR_SHA_COUNT -B merge_pr_base"
  -PUSH_BRANCHES="git push git@github.com:angular/angular.git merge_pr_master:master merge_pr_patch:$PATCH_BRANCH"
  SQUASH_PR="git rebase --autosquash --interactive merge_pr_base merge_pr"
  -CHERRY_PICK_PR="git cherry-pick merge_pr_base..merge_pr"
  REWRITE_MESSAGE="git filter-branch -f --msg-filter \"$BASEDIR/utils/github_closes.js $PR_NUMBER\" merge_pr_base..merge_pr"
  +PUSH_BRANCHES="git push git@github.com:angular/angular.git merge_pr_master:master merge_pr_patch:$PATCH_BRANCH"
  +CHERRY_PICK_PR="git cherry-pick merge_pr_base..merge_pr"
  echo "======================"
  echo "GitHub Merge PR Steps"
  