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WIP: Document patch manager responsibilities
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,229 @@ | ||
| #!/usr/bin/env bash | ||
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| # Based on github.com/kubernetes/kubernetes/blob/v1.8.2/hack/cherry_pick_pull.sh | ||
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| # Checkout a PR from GitHub. (Yes, this is sitting in a Git tree. How | ||
| # meta.) Assumes you care about pulls from remote "upstream" and | ||
| # checks thems out to a branch named: | ||
| # automated-cherry-pick-of-<pr>-<target branch>-<timestamp> | ||
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| set -o errexit | ||
| set -o nounset | ||
| set -o pipefail | ||
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| declare -r ETCD_ROOT="$(dirname "${BASH_SOURCE}")/../.." | ||
| cd "${ETCD_ROOT}" | ||
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| declare -r STARTINGBRANCH=$(git symbolic-ref --short HEAD) | ||
| declare -r REBASEMAGIC="${ETCD_ROOT}/.git/rebase-apply" | ||
| DRY_RUN=${DRY_RUN:-""} | ||
| REGENERATE_DOCS=${REGENERATE_DOCS:-""} | ||
| UPSTREAM_REMOTE=${UPSTREAM_REMOTE:-upstream} | ||
| FORK_REMOTE=${FORK_REMOTE:-origin} | ||
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| if [[ -z ${GITHUB_USER:-} ]]; then | ||
| echo "Please export GITHUB_USER=<your-user> (or GH organization, if that's where your fork lives)" | ||
| exit 1 | ||
| fi | ||
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| if ! which hub > /dev/null; then | ||
| echo "Can't find 'hub' tool in PATH, please install from https://github.com/github/hub" | ||
| exit 1 | ||
| fi | ||
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| if [[ "$#" -lt 2 ]]; then | ||
| echo "${0} <remote branch> <pr-number>...: cherry pick one or more <pr> onto <remote branch> and leave instructions for proposing pull request" | ||
| echo | ||
| echo " Checks out <remote branch> and handles the cherry-pick of <pr> (possibly multiple) for you." | ||
| echo " Examples:" | ||
| echo " $0 upstream/release-3.14 12345 # Cherry-picks PR 12345 onto upstream/release-3.14 and proposes that as a PR." | ||
| echo " $0 upstream/release-3.14 12345 56789 # Cherry-picks PR 12345, then 56789 and proposes the combination as a single PR." | ||
| echo | ||
| echo " Set the DRY_RUN environment var to skip git push and creating PR." | ||
| echo " This is useful for creating patches to a release branch without making a PR." | ||
| echo " When DRY_RUN is set the script will leave you in a branch containing the commits you cherry-picked." | ||
| echo | ||
| echo " Set the REGENERATE_DOCS environment var to regenerate documentation for the target branch after picking the specified commits." | ||
| echo " This is useful when picking commits containing changes to API documentation." | ||
| echo | ||
| echo " Set UPSTREAM_REMOTE (default: upstream) and FORK_REMOTE (default: origin)" | ||
| echo " To override the default remote names to what you have locally." | ||
| exit 2 | ||
| fi | ||
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| if git_status=$(git status --porcelain --untracked=no 2>/dev/null) && [[ -n "${git_status}" ]]; then | ||
| echo "!!! Dirty tree. Clean up and try again." | ||
| exit 1 | ||
| fi | ||
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| if [[ -e "${REBASEMAGIC}" ]]; then | ||
| echo "!!! 'git rebase' or 'git am' in progress. Clean up and try again." | ||
| exit 1 | ||
| fi | ||
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| declare -r BRANCH="$1" | ||
| shift 1 | ||
| declare -r PULLS=( "$@" ) | ||
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| function join { local IFS="$1"; shift; echo "$*"; } | ||
| declare -r PULLDASH=$(join - "${PULLS[@]/#/#}") # Generates something like "#12345-#56789" | ||
| declare -r PULLSUBJ=$(join " " "${PULLS[@]/#/#}") # Generates something like "#12345 #56789" | ||
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| echo "+++ Updating remotes..." | ||
| git remote update "${UPSTREAM_REMOTE}" "${FORK_REMOTE}" | ||
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| if ! git log -n1 --format=%H "${BRANCH}" >/dev/null 2>&1; then | ||
| echo "!!! '${BRANCH}' not found. The second argument should be something like ${UPSTREAM_REMOTE}/release-0.21." | ||
| echo " (In particular, it needs to be a valid, existing remote branch that I can 'git checkout'.)" | ||
| exit 1 | ||
| fi | ||
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| declare -r NEWBRANCHREQ="automated-cherry-pick-of-${PULLDASH}" # "Required" portion for tools. | ||
| declare -r NEWBRANCH="$(echo "${NEWBRANCHREQ}-${BRANCH}" | sed 's/\//-/g')" | ||
| declare -r NEWBRANCHUNIQ="${NEWBRANCH}-$(date +%s)" | ||
| echo "+++ Creating local branch ${NEWBRANCHUNIQ}" | ||
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| cleanbranch="" | ||
| prtext="" | ||
| gitamcleanup=false | ||
| function return_to_kansas { | ||
| if [[ "${gitamcleanup}" == "true" ]]; then | ||
| echo | ||
| echo "+++ Aborting in-progress git am." | ||
| git am --abort >/dev/null 2>&1 || true | ||
| fi | ||
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| # return to the starting branch and delete the PR text file | ||
| if [[ -z "${DRY_RUN}" ]]; then | ||
| echo | ||
| echo "+++ Returning you to the ${STARTINGBRANCH} branch and cleaning up." | ||
| git checkout -f "${STARTINGBRANCH}" >/dev/null 2>&1 || true | ||
| if [[ -n "${cleanbranch}" ]]; then | ||
| git branch -D "${cleanbranch}" >/dev/null 2>&1 || true | ||
| fi | ||
| if [[ -n "${prtext}" ]]; then | ||
| rm "${prtext}" | ||
| fi | ||
| fi | ||
| } | ||
| trap return_to_kansas EXIT | ||
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| SUBJECTS=() | ||
| function make-a-pr() { | ||
| local rel="$(basename "${BRANCH}")" | ||
| echo | ||
| echo "+++ Creating a pull request on GitHub at ${GITHUB_USER}:${NEWBRANCH}" | ||
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| # This looks like an unnecessary use of a tmpfile, but it avoids | ||
| # https://github.com/github/hub/issues/976 Otherwise stdin is stolen | ||
| # when we shove the heredoc at hub directly, tickling the ioctl | ||
| # crash. | ||
| prtext="$(mktemp -t prtext.XXXX)" # cleaned in return_to_kansas | ||
| cat >"${prtext}" <<EOF | ||
| Automated cherry pick of ${PULLSUBJ} | ||
| Cherry pick of ${PULLSUBJ} on ${rel}. | ||
| $(printf '%s\n' "${SUBJECTS[@]}") | ||
| EOF | ||
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| hub pull-request -F "${prtext}" -h "${GITHUB_USER}:${NEWBRANCH}" -b "etcd:${rel}" | ||
| } | ||
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| git checkout -b "${NEWBRANCHUNIQ}" "${BRANCH}" | ||
| cleanbranch="${NEWBRANCHUNIQ}" | ||
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| gitamcleanup=true | ||
| for pull in "${PULLS[@]}"; do | ||
| echo "+++ Downloading patch to /tmp/${pull}.patch (in case you need to do this again)" | ||
| curl -o "/tmp/${pull}.patch" -sSL "https://github.com/coreos/etcd/pull/${pull}.patch" | ||
| echo | ||
| echo "+++ About to attempt cherry pick of PR. To reattempt:" | ||
| echo " $ git am -3 /tmp/${pull}.patch" | ||
| echo | ||
| git am -3 "/tmp/${pull}.patch" || { | ||
| conflicts=false | ||
| while unmerged=$(git status --porcelain | grep ^U) && [[ -n ${unmerged} ]] \ | ||
| || [[ -e "${REBASEMAGIC}" ]]; do | ||
| conflicts=true # <-- We should have detected conflicts once | ||
| echo | ||
| echo "+++ Conflicts detected:" | ||
| echo | ||
| (git status --porcelain | grep ^U) || echo "!!! None. Did you git am --continue?" | ||
| echo | ||
| echo "+++ Please resolve the conflicts in another window (and remember to 'git add / git am --continue')" | ||
| read -p "+++ Proceed (anything but 'y' aborts the cherry-pick)? [y/n] " -r | ||
| echo | ||
| if ! [[ "${REPLY}" =~ ^[yY]$ ]]; then | ||
| echo "Aborting." >&2 | ||
| exit 1 | ||
| fi | ||
| done | ||
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| if [[ "${conflicts}" != "true" ]]; then | ||
| echo "!!! git am failed, likely because of an in-progress 'git am' or 'git rebase'" | ||
| exit 1 | ||
| fi | ||
| } | ||
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| # set the subject | ||
| subject=$(grep -m 1 "^Subject" "/tmp/${pull}.patch" | sed -e 's/Subject: \[PATCH//g' | sed 's/.*] //') | ||
| SUBJECTS+=("#${pull}: ${subject}") | ||
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| # remove the patch file from /tmp | ||
| rm -f "/tmp/${pull}.patch" | ||
| done | ||
| gitamcleanup=false | ||
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| # Re-generate docs (if needed) | ||
| if [[ -n "${REGENERATE_DOCS}" ]]; then | ||
| echo | ||
| echo "Regenerating docs..." | ||
| if ! hack/generate-docs.sh; then | ||
| echo | ||
| echo "hack/generate-docs.sh FAILED to complete." | ||
| exit 1 | ||
| fi | ||
| fi | ||
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| if [[ -n "${DRY_RUN}" ]]; then | ||
| echo "!!! Skipping git push and PR creation because you set DRY_RUN." | ||
| echo "To return to the branch you were in when you invoked this script:" | ||
| echo | ||
| echo " git checkout ${STARTINGBRANCH}" | ||
| echo | ||
| echo "To delete this branch:" | ||
| echo | ||
| echo " git branch -D ${NEWBRANCHUNIQ}" | ||
| exit 0 | ||
| fi | ||
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| if git remote -v | grep ^${FORK_REMOTE} | grep etcd/etcd.git; then | ||
| echo "!!! You have ${FORK_REMOTE} configured as your etcd/etcd.git" | ||
| echo "This isn't normal. Leaving you with push instructions:" | ||
| echo | ||
| echo "+++ First manually push the branch this script created:" | ||
| echo | ||
| echo " git push REMOTE ${NEWBRANCHUNIQ}:${NEWBRANCH}" | ||
| echo | ||
| echo "where REMOTE is your personal fork (maybe ${UPSTREAM_REMOTE}? Consider swapping those.)." | ||
| echo "OR consider setting UPSTREAM_REMOTE and FORK_REMOTE to different values." | ||
| echo | ||
| make-a-pr | ||
| cleanbranch="" | ||
| exit 0 | ||
| fi | ||
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| echo | ||
| echo "+++ I'm about to do the following to push to GitHub (and I'm assuming ${FORK_REMOTE} is your personal fork):" | ||
| echo | ||
| echo " git push ${FORK_REMOTE} ${NEWBRANCHUNIQ}:${NEWBRANCH}" | ||
| echo | ||
| read -p "+++ Proceed (anything but 'y' aborts the cherry-pick)? [y/n] " -r | ||
| if ! [[ "${REPLY}" =~ ^[yY]$ ]]; then | ||
| echo "Aborting." >&2 | ||
| exit 1 | ||
| fi | ||
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| git push "${FORK_REMOTE}" -f "${NEWBRANCHUNIQ}:${NEWBRANCH}" | ||
| make-a-pr |