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Merge pull request yunionio#31 from zexi/cherry-pick-#30
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| Original file line number | Diff line number | Diff line change |
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| #!/usr/bin/env bash | ||
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| # Copyright 2015 The Kubernetes Authors. | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
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| # Usage Instructions: https://github.com/kubernetes/community/blob/master/contributors/devel/sig-release/cherry-picks.md | ||
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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 them 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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| REPO_ROOT="$(git rev-parse --show-toplevel)" | ||
| declare -r REPO_ROOT | ||
| cd "${REPO_ROOT}" | ||
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| function git_remote_get_url() { | ||
| git remote get-url $1 2>/dev/null | ||
| if [ "$?" -ne "0" ]; then | ||
| git config remote.$1.url 2>/dev/null | ||
| fi | ||
| if [ "$?" -ne "0" ]; then | ||
| echo "git fail get remote url for $1" | ||
| exit 1 | ||
| fi | ||
| } | ||
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| STARTINGBRANCH=$(git symbolic-ref --short HEAD) | ||
| declare -r STARTINGBRANCH | ||
| declare -r REBASEMAGIC="${REPO_ROOT}/.git/rebase-apply" | ||
| DRY_RUN=${DRY_RUN:-""} | ||
| UPSTREAM_REMOTE=${UPSTREAM_REMOTE:-upstream} | ||
| FORK_REMOTE=${FORK_REMOTE:-origin} | ||
| MAIN_REPO_ORG=${MAIN_REPO_ORG:-$(git_remote_get_url "$UPSTREAM_REMOTE" | awk '{gsub(/http[s]:\/\/|git@/,"")}1' | awk -F'[@:./]' 'NR==1{print $3}')} | ||
| MAIN_REPO_NAME=${MAIN_REPO_NAME:-$(git_remote_get_url "$UPSTREAM_REMOTE" | awk '{gsub(/http[s]:\/\/|git@/,"")}1' | awk -F'[@:./]' 'NR==1{print $4}')} | ||
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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 " $0 upstream/release-3.14 12345 56789 # Cherry-picks PR 12345, then 56789 and proposes the combination as a single PR." | ||
| echo | ||
| echo " Set the DRY_RUN environment var to skip git push and creating PR." | ||
| echo " This is useful for creating patches to a release branch without making a PR." | ||
| echo " When DRY_RUN is set the script will leave you in a branch containing the commits you cherry-picked." | ||
| echo | ||
| echo " Set UPSTREAM_REMOTE (default: upstream) and FORK_REMOTE (default: origin)" | ||
| echo " To override the default remote names to what you have locally." | ||
| exit 2 | ||
| fi | ||
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| if git_status=$(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="$(echo "${BRANCH}" | sed "s|$UPSTREAM_REMOTE/||g")" | ||
| 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="$(mktemp -t prtext.XXXX)" # cleaned in return_to_kansas | ||
| local numandtitle=$(printf '%s\n' "${SUBJECTS[@]}") | ||
| cat >"${prtext}" <<EOF | ||
| Automated cherry pick of ${numandtitle} | ||
| Cherry pick of ${PULLSUBJ} on ${rel}. | ||
| ${numandtitle} | ||
| EOF | ||
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| hub pull-request -F "${prtext}" -h "${GITHUB_USER}:${NEWBRANCH}" -b "${MAIN_REPO_ORG}:${rel}" | ||
| } | ||
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| function extract-subject { | ||
| local patch="$1" | ||
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| python -c ' | ||
| import os | ||
| import email.parser | ||
| import email.header | ||
| with open("'"$patch"'", "r") as f: | ||
| m = email.parser.Parser().parse(f, headersonly=True) | ||
| subj = m["subject"] | ||
| subj = email.header.decode_header(subj) | ||
| s = u"" | ||
| for txt, enc in subj: | ||
| txt = txt.decode(enc) if enc else txt | ||
| txt = txt.decode("ascii") if isinstance(txt, bytes) else txt | ||
| txt = txt.replace(u"\n", u"") | ||
| if txt.startswith(u"[PATCH"): | ||
| i = txt.index(u"]") | ||
| txt = txt[i+1:] | ||
| s += txt | ||
| s = s.strip() + u"\n" | ||
| s = s.encode("utf-8") # write out utf-8 bytes whatsoever | ||
| os.write(1, s) | ||
| ' | ||
| } | ||
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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/${pull}.patch (in case you need to do this again)" | ||
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| curl -o "/tmp/${pull}.patch" -sSL "https://github.com/${MAIN_REPO_ORG}/${MAIN_REPO_NAME}/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 [[ "${conflicts}" != "true" ]]; then | ||
| echo "!!! git am failed, likely because of an in-progress 'git am' or 'git rebase'" | ||
| exit 1 | ||
| fi | ||
| } | ||
|
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| # set the subject | ||
| subject=$(extract-subject "/tmp/${pull}.patch") | ||
| SUBJECTS+=("#${pull}: ${subject}") | ||
|
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| # remove the patch file from /tmp | ||
| rm -f "/tmp/${pull}.patch" | ||
| done | ||
| gitamcleanup=false | ||
|
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| 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 ${MAIN_REPO_ORG}/${MAIN_REPO_NAME}.git; then | ||
| echo "!!! You have ${FORK_REMOTE} configured as your ${MAIN_REPO_ORG}/${MAIN_REPO_NAME}.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 |
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