|
| 1 | +require 'open-uri' |
| 2 | +require 'json' |
| 3 | +require 'optparse' |
| 4 | +require 'logger' |
| 5 | + |
| 6 | +class PullRequestBackporter |
| 7 | + |
| 8 | + def initialize |
| 9 | + @logger = Logger.new(STDOUT) |
| 10 | + @options = { |
| 11 | + upstream: "kenhys/fluentd", |
| 12 | + branch: "v1.16", |
| 13 | + dry_run: false, |
| 14 | + log_level: Logger::Severity::INFO |
| 15 | + } |
| 16 | + end |
| 17 | + |
| 18 | + def parse_command_line(argv) |
| 19 | + opt = OptionParser.new |
| 20 | + opt.on('--upstream REPOSITORY', |
| 21 | + 'Specify upstream repository (e.g. fluent/fluentd)') {|v| @options[:upstream] = v } |
| 22 | + opt.on('--branch BRANCH') {|v| @options[:branch] = v } |
| 23 | + opt.on('--dry-run') {|v| @options[:dry_run] = true } |
| 24 | + opt.on('--log-level LOG_LEVEL (e.g. debug,info)') {|v| |
| 25 | + @options[:log_level] = case v |
| 26 | + when "error" |
| 27 | + Logger::Severity::ERROR |
| 28 | + when "warn" |
| 29 | + Logger::Severity::WARN |
| 30 | + when "debug" |
| 31 | + Logger::Severity::DEBUG |
| 32 | + when "info" |
| 33 | + Logger::Severity::INFO |
| 34 | + else |
| 35 | + puts "unknown log level: <#{v}>" |
| 36 | + exit 1 |
| 37 | + end |
| 38 | + } |
| 39 | + opt.parse!(argv) |
| 40 | + end |
| 41 | + |
| 42 | + def collect_backports |
| 43 | + backports = [] |
| 44 | + 5.times.each do |page| |
| 45 | + @logger.debug "Collecting backport information" |
| 46 | + URI.open("https://api.github.com/repos/fluent/fluentd/pulls?state=closed&per_page=100&page=#{page+1}", |
| 47 | + "Accept" => "application/vnd.github+json", |
| 48 | + "Authorization" => "Bearer #{ENV['GITHUB_TOKEN']}", |
| 49 | + "X-GitHub-Api-Version" => "2022-11-28") do |request| |
| 50 | + JSON.parse(request.read).each do |pull_request| |
| 51 | + unless pull_request["labels"].empty? |
| 52 | + labels = pull_request["labels"].collect { |label| label["name"] } |
| 53 | + unless labels.include?("backport to #{@options[:branch]}") |
| 54 | + next |
| 55 | + end |
| 56 | + if labels.include?("backported") |
| 57 | + @logger.info "[DONE] \##{pull_request['number']} #{pull_request['title']} LABELS: #{pull_request['labels'].collect { |label| label['name'] }}" |
| 58 | + next |
| 59 | + end |
| 60 | + @logger.info "* \##{pull_request['number']} #{pull_request['title']} LABELS: #{pull_request['labels'].collect { |label| label['name'] }}" |
| 61 | + # merged into this commit |
| 62 | + @logger.debug "MERGE_COMMIT_SHA: #{pull_request['merge_commit_sha']}" |
| 63 | + body = pull_request["body"].gsub(/\*\*Which issue\(s\) this PR fixes\*\*: \r\n/, |
| 64 | + "**Which issue(s) this PR fixes**: \r\nBackport \##{pull_request['number']}\r\n") |
| 65 | + backports << { |
| 66 | + number: pull_request["number"], |
| 67 | + merge_commit_sha: pull_request["merge_commit_sha"], |
| 68 | + title: "Backport(#{@options[:branch]}): #{pull_request['title']} (\##{pull_request['number']})", |
| 69 | + body: body |
| 70 | + } |
| 71 | + end |
| 72 | + end |
| 73 | + end |
| 74 | + end |
| 75 | + backports |
| 76 | + end |
| 77 | + |
| 78 | + def create_pull_requests |
| 79 | + backports = collect_backports |
| 80 | + if backports.size == 0 |
| 81 | + @logger.debug "No need to backport: #{backports.size} PR" |
| 82 | + return |
| 83 | + end |
| 84 | + |
| 85 | + failed = [] |
| 86 | + backports.each do |backport| |
| 87 | + @logger.info "Backport #{backport[:number]} #{backport[:title]}" |
| 88 | + if @options[:dry_run] |
| 89 | + @logger.info "DRY_RUN: PR was created: \##{backport[:number]} #{backport[:title]}" |
| 90 | + next |
| 91 | + end |
| 92 | + begin |
| 93 | + branch = "backport-#{backport[:number]}" |
| 94 | + @logger.debug "git switch --create #{branch} --track origin/#{@options[:branch]}" |
| 95 | + IO.popen(["git", "switch", "--create", branch, "--track", "origin/#{@options[:branch]}"]) do |io| |
| 96 | + @logger.debug io.read |
| 97 | + end |
| 98 | + @logger.info `git branch` |
| 99 | + @logger.info "cherry-pick for #{backport[:number]}" |
| 100 | + @logger.debug "git cherry-pick --signoff #{backport[:merge_commit_sha]}" |
| 101 | + IO.popen(["git", "cherry-pick", "--signoff", backport[:merge_commit_sha]]) do |io| |
| 102 | + @logger.debug io.read |
| 103 | + end |
| 104 | + if $? != 0 |
| 105 | + @logger.warn "Give up cherry-pick for #{backport[:number]}" |
| 106 | + @logger.debug `git cherry-pick --abort` |
| 107 | + failed << backport |
| 108 | + next |
| 109 | + else |
| 110 | + @logger.info "Push branch: #{branch}" |
| 111 | + @logger.debug `git push origin #{branch}` |
| 112 | + end |
| 113 | + |
| 114 | + @logger.debug "Create pull request: #{branch}" |
| 115 | + upstream_repo = "/repos/#{@options[:upstream]}/pulls" |
| 116 | + owner = @options[:upstream].split('/').first |
| 117 | + head = "#{owner}:#{branch}" |
| 118 | + IO.popen(["gh", "api", "--method", "POST", |
| 119 | + "-H", "Accept: application/vnd.github+json", |
| 120 | + "-H", "X-GitHub-Api-Version: 2022-11-28", |
| 121 | + upstream_repo, |
| 122 | + "-f", "title=#{backport[:title]}", |
| 123 | + "-f", "body=#{backport[:body]}", |
| 124 | + "-f", "head=#{head}", |
| 125 | + "-f", "base=#{@options[:branch]}"]) do |io| |
| 126 | + json = JSON.parse(io.read) |
| 127 | + @logger.info "PR was created: #{json['url']}" |
| 128 | + end |
| 129 | + rescue => e |
| 130 | + @logger.error "ERROR: #{backport[:number]} #{e.message}" |
| 131 | + end |
| 132 | + end |
| 133 | + failed.each do |backport| |
| 134 | + @logger.error "FAILED: #{backport[:number]} #{backport[:title]}" |
| 135 | + end |
| 136 | + end |
| 137 | + |
| 138 | + def run(argv) |
| 139 | + parse_command_line(argv) |
| 140 | + @logger.info("Target upstream: #{@options[:upstream]} target branch: #{@options[:branch]}") |
| 141 | + create_pull_requests |
| 142 | + end |
| 143 | +end |
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