236 lines
6.9 KiB
Bash
Executable File
236 lines
6.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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# https://www.tldp.org/LDP/abs/html/options.html#AEN19601
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# https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html
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set -u -e -E -o pipefail
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BOLD='printf \e[1m'
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RESET_STYLES='printf \e[0m'
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LIGHT_CYAN='printf \e[96m'
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LIGHT_MAGENTA='printf \e[95m'
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GREEN='printf \e[32m'
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RED='printf \e[31m'
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BASEDIR=$(dirname "$0")
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BASEDIR=`(cd $BASEDIR; pwd)`
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PR_NUMBER=0
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PUSH_UPSTREAM=1
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FORCE=0
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while [[ $# -gt 0 ]]
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do
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key="$1"
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case $key in
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--dryrun)
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PUSH_UPSTREAM=0
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shift # past argument
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;;
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--force)
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FORCE=1
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shift # past argument
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;;
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*) # unknown option
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PR_NUMBER="$1" # save it in an array for later
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shift # past argument
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;;
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esac
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done
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if [ "$PR_NUMBER" -eq 0 ]; then
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echo "Merge github PR into the target branches if status is green"
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echo
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echo "$0 PR_NUMBER [--dryrun] [--force]"
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echo
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echo --dryrun Performs all operations but does not push the merge back to git@github.com:angular/angular.git.
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echo --force Continues even if PR status is not green.
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exit 0
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fi
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if [ -z ${TOKEN:-''} ]; then
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$RED
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echo "############################################################"
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echo "############################################################"
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echo "WARNING: you should set the TOKEN variable to a github token"
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echo "############################################################"
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echo "############################################################"
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$RESET_STYLES
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GH_AUTH=""
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else
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GH_AUTH="Authorization: token $TOKEN"
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fi
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PULL_JSON=`curl -H "$GH_AUTH" -s https://api.github.com/repos/angular/angular/pulls/$PR_NUMBER`
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PR_SHA_COUNT=`node $BASEDIR/utils/json_extract.js commits <<< """$PULL_JSON"""`
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STATUS_JSON_URL=`node $BASEDIR/utils/json_extract.js _links.statuses.href <<< """$PULL_JSON"""`
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STATUS=`curl -H "$GH_AUTH" -s $STATUS_JSON_URL | node $BASEDIR/utils/json_extract.js description | cut -d '|' -f1`
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PR_LABELS=`curl -H "$GH_AUTH" -s https://api.github.com/repos/angular/angular/issues/$PR_NUMBER/labels`
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PR_ACTION=`echo "$PR_LABELS" | node $BASEDIR/utils/json_extract.js "name=^PR action:"`
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PR_TARGET=`echo "$PR_LABELS" | node $BASEDIR/utils/json_extract.js "name=^PR target:"`
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PR_CLA=`echo "$PR_LABELS" | node $BASEDIR/utils/json_extract.js "name=^cla"`
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MASTER_BRANCH='master'
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if [[ ! "$PR_ACTION" =~ "PR action: merge" ]]; then
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$RED
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echo The PR is missing 'PR action: merge(-assistance)' label, found: $PR_ACTION
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$RESET_STYLES
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exit 1
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fi
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if [[ "$PR_CLA" != "cla: yes" ]]; then
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$RED
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echo The PR is missing 'cla: Yes' label, found: $PR_CLA
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$RESET_STYLES
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exit 1
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fi
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if [[ "$STATUS" != "All checks passed!" ]]; then
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echo PR $PR_NUMBER is failing with: $STATUS
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if [[ $FORCE == 1 ]]; then
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$BOLD
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$LIGHT_MAGENTA
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echo FORCING: --force flag used to ignore PR status.
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$RESET_STYLES
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else
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echo Exiting...
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exit 1
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fi
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fi
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if [[ $PR_TARGET == "PR target: master & patch" ]]; then
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MERGE_MASTER=1
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MERGE_PATCH=1
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elif [[ $PR_TARGET == "PR target: master-only" ]]; then
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MERGE_MASTER=1
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MERGE_PATCH=0
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elif [[ $PR_TARGET == "PR target: patch-only" ]]; then
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MERGE_MASTER=0
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MERGE_PATCH=1
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else
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$RED
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echo "Unknown PR target format: $PR_TARGET"
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$RESET_STYLES
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exit 1;
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fi
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CURRENT_BRANCH=`git rev-parse --abbrev-ref HEAD`
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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`
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CHECKOUT_MASTER="git checkout merge_pr_master"
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CHECKOUT_PATCH="git checkout merge_pr_patch"
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RESTORE_BRANCH="git checkout $CURRENT_BRANCH"
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FETCH_PR="git fetch git@github.com:angular/angular.git pull/$PR_NUMBER/head:merge_pr heads/$MASTER_BRANCH:merge_pr_master heads/$PATCH_BRANCH:merge_pr_patch -f"
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BASE_PR="git checkout merge_pr~$PR_SHA_COUNT -B merge_pr_base"
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SQUASH_PR="git rebase --autosquash --interactive merge_pr_base merge_pr"
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REWRITE_MESSAGE="git filter-branch -f --msg-filter \"$BASEDIR/utils/github_closes.js $PR_NUMBER\" merge_pr_base..merge_pr"
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PUSH_BRANCHES="git push git@github.com:angular/angular.git merge_pr_master:$MASTER_BRANCH merge_pr_patch:$PATCH_BRANCH"
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CHERRY_PICK_PR="git cherry-pick merge_pr_base..merge_pr"
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# Checks that each PR branch to be merged upstream contains SHAs of commits that significantly changed our CI infrastructure.
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#
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# This check is used to enforce that we don't merge PRs that have not been rebased recently and could result in merging
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# of non-approved or otherwise bad changes.
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REQUIRED_BASE_SHA_MASTER="a03a9236f2aed5d00012d25f032aa43a046d91da" # pullapprove => CODEOWNERS migration
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REQUIRED_BASE_SHA_PATCH="a03a9236f2aed5d00012d25f032aa43a046d91da" # pullapprove => CODEOWNERS migration
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if [[ $MERGE_MASTER == 1 ]]; then
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REQUIRED_BASE_SHA="$REQUIRED_BASE_SHA_MASTER"
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# check patch only if patch-only PR
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elif [[ $MERGE_PATCH == 1 ]]; then
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REQUIRED_BASE_SHA="$REQUIRED_BASE_SHA_PATCH"
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fi
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CHECK_IF_PR_REBASED="git branch --quiet merge_pr --contains $REQUIRED_BASE_SHA"
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$BOLD
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$LIGHT_CYAN
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echo "======================"
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echo "GitHub Merge PR Steps"
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echo "======================"
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echo " $FETCH_PR"
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echo " $BASE_PR"
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echo " $CHECK_IF_PR_REBASED"
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echo " $SQUASH_PR"
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echo " $REWRITE_MESSAGE"
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if [[ $MERGE_MASTER == 1 ]]; then
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echo " $CHECKOUT_MASTER && $CHERRY_PICK_PR"
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fi
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if [[ $MERGE_PATCH == 1 ]]; then
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echo " $CHECKOUT_PATCH && $CHERRY_PICK_PR"
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fi
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echo " $PUSH_BRANCHES"
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echo " $RESTORE_BRANCH"
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echo "----------------------"
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$RESET_STYLES
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$BOLD
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echo ""
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echo ">>> Fetch PR: $FETCH_PR"
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$RESET_STYLES
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$FETCH_PR
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$BOLD
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echo ""
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echo ">>> Mark base: $BASE_PR"
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$RESET_STYLES
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$BASE_PR
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$BOLD
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echo ""
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echo ">>> Check if PR rebased: $CHECK_IF_PR_REBASED"
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$RESET_STYLES
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if [[ $($CHECK_IF_PR_REBASED) != "" ]]; then
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$GREEN
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echo "The PR is sufficiently rebased!"
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$RESET_STYLES
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else
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$RED
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echo ""
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echo ""
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echo "Failed to merge pull request #${PR_NUMBER} because it hasn't been rebased recently and could be bypassing new or updated CI checks!"
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echo ""
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echo "Please rebase the PR and try again."
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echo ""|
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$RESET_STYLES
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$RESTORE_BRANCH
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exit 1
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fi
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$BOLD
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echo ""
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echo ">>> Autosquash: $SQUASH_PR"
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$RESET_STYLES
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GIT_EDITOR=echo $SQUASH_PR
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$BOLD
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echo ""
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echo ">>> Rewrite message: $REWRITE_MESSAGE"
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# Next line should work, but it errors, hence copy paste the command.
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# $REWRITE_MESSAGE
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$RESET_STYLES
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git filter-branch -f --msg-filter "$BASEDIR/utils/github_closes.js $PR_NUMBER" merge_pr_base..merge_pr
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if [[ $MERGE_MASTER == 1 ]]; then
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$BOLD
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echo
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echo ">>> Cherry pick to master: $CHECKOUT_MASTER && $CHERRY_PICK_PR"
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$RESET_STYLES
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$CHECKOUT_MASTER
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$CHERRY_PICK_PR
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fi
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if [[ $MERGE_PATCH == 1 ]]; then
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$BOLD
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echo
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echo ">>> Cherry pick to patch: $CHECKOUT_PATCH && $CHERRY_PICK_PR"
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$RESET_STYLES
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$CHECKOUT_PATCH
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$CHERRY_PICK_PR
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fi
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$RESTORE_BRANCH
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if [[ $PUSH_UPSTREAM == 1 ]]; then
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$BOLD
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echo
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echo ">>> Push branches to angular repo"
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$RESET_STYLES
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$PUSH_BRANCHES
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fi
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$BOLD
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$GREEN
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echo
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echo ">>>>>> SUCCESS <<<<<< PR#$PR_NUMBER merged."
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$RESET_STYLES
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