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128 lines
4.0 KiB
128 lines
4.0 KiB
#!/usr/bin/env bash
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# vim: ts=2 et
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# Setting -x is absolutely forbidden as it could leak the GitHub token.
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set -uo pipefail
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# GITHUB_TOKEN required scope: repo.repo_public
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git_mail="prometheus-team@googlegroups.com"
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git_user="prombot"
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branch="repo_sync"
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commit_msg="Update common Prometheus files"
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pr_title="Synchronize common files from prometheus/prometheus"
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pr_msg="Propagating changes from prometheus/prometheus default branch."
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orgs="prometheus prometheus-community"
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GITHUB_TOKEN="${GITHUB_TOKEN:-}"
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if [ -z "${GITHUB_TOKEN}" ]; then
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echo -e "\e[31mGitHub token (GITHUB_TOKEN) not set. Terminating.\e[0m"
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exit 1
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fi
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# List of files that should be synced.
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SYNC_FILES="CODE_OF_CONDUCT.md LICENSE Makefile.common"
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# Go to the root of the repo
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cd "$(git rev-parse --show-cdup)" || exit 1
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source_dir="$(pwd)"
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tmp_dir="$(mktemp -d)"
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trap 'rm -rf "${tmp_dir}"' EXIT
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fetch_repos() {
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local url="https://api.github.com/users/${1}/repos?per_page=100"
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curl --retry 5 --silent -u "${git_user}:${GITHUB_TOKEN}" "${url}" 2>/dev/null |
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jq -r '.[] | select( .name != "prometheus" ) | .name'
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}
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push_branch() {
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# stdout and stderr are redirected to /dev/null otherwise git-push could leak
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# the token in the logs.
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git push --quiet \
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"https://${GITHUB_TOKEN}:@github.com/${1}" \
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--set-upstream "${branch}" 1>/dev/null 2>&1
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}
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post_template='{"title":"%s","base":"master","head":"%s","body":"%s"}'
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post_json="$(printf "${post_template}" "${pr_title}" "${branch}" "${pr_msg}")"
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post_pull_request() {
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curl --show-error --silent --fail \
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-u "${git_user}:${GITHUB_TOKEN}" \
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-d "${post_json}" \
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"https://api.github.com/repos/${1}/pulls"
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}
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check_license() {
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# Check to see if the input is an Apache license of some kind
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echo "$1" | grep --quiet --no-messages --ignore-case 'Apache License'
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}
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process_repo() {
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local org_repo="$1"
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echo -e "\e[32mAnalyzing '${org_repo}'\e[0m"
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local needs_update=()
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for source_file in ${SYNC_FILES}; do
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source_checksum="$(sha256sum "${source_dir}/${source_file}" | cut -d' ' -f1)"
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target_file="$(curl -s --fail "https://raw.githubusercontent.com/${org_repo}/master/${source_file}")"
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if [[ "${source_file}" == 'LICENSE' ]] && ! check_license "${target_file}" ; then
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echo "LICENSE in ${org_repo} is not apache, skipping."
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continue
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fi
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if [[ -z "${target_file}" ]]; then
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echo "${source_file} doesn't exist in ${org_repo}"
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if [[ "${source_file}" == 'CODE_OF_CONDUCT.md' ]] ; then
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echo "CODE_OF_CONDUCT.md missing in ${org_repo}, force updating."
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needs_update+=('CODE_OF_CONDUCT.md')
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fi
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continue
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fi
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target_checksum="$(echo "${target_file}" | sha256sum | cut -d' ' -f1)"
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if [ "${source_checksum}" == "${target_checksum}" ]; then
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echo "${source_file} is already in sync."
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continue
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fi
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needs_update+=("${source_file}")
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done
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if [[ "${#needs_update[@]}" -eq 0 ]] ; then
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echo "No files need sync."
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return
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fi
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# Clone target repo to temporary directory and checkout to new branch
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git clone --quiet "https://github.com/${org_repo}.git" "${tmp_dir}/${org_repo}"
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cd "${tmp_dir}/${org_repo}" || return 1
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git checkout -b "${branch}" || return 1
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# Update the files in target repo by one from prometheus/prometheus.
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for source_file in ${needs_update[@]}; do
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cp -f "${source_dir}/${source_file}" "./${source_file}"
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done
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if [ -n "$(git status --porcelain)" ]; then
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git config user.email "${git_mail}"
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git config user.name "${git_user}"
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git add .
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git commit -s -m "${commit_msg}"
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if push_branch "${org_repo}"; then
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post_pull_request "${org_repo}"
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fi
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fi
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}
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for org in ${orgs}; do
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mkdir -p "${tmp_dir}/${org}"
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# Iterate over all repositories in ${org}. The GitHub API can return 100 items
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# at most but it should be enough for us as there are less than 40 repositories
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# currently.
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fetch_repos "${org}" | while read -r repo; do
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if ! process_repo "${org}/${repo}"; then
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echo "Failed to process '${org}/${repo}'"
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exit 1
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fi
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done
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done
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