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-rwxr-xr-xbin/changelog163
1 files changed, 163 insertions, 0 deletions
diff --git a/bin/changelog b/bin/changelog
new file mode 100755
index 00000000000..2b08e3e4c2a
--- /dev/null
+++ b/bin/changelog
@@ -0,0 +1,163 @@
+#!/usr/bin/env ruby
+#
+# Generate a changelog entry file in the correct location.
+#
+# Automatically stages the file and amends the previous commit if the `--amend`
+# argument is used.
+
+require 'optparse'
+require 'yaml'
+
+Options = Struct.new(
+ :amend,
+ :author,
+ :dry_run,
+ :merge_request,
+ :title
+)
+
+class ChangelogOptionParser
+ def self.parse(argv)
+ options = Options.new
+
+ parser = OptionParser.new do |opts|
+ opts.banner = "Usage: #{__FILE__} [options]"
+
+ # Note: We do not provide a shorthand for this in order to match the `git
+ # commit` interface
+ opts.on('--amend', 'Amend the previous commit') do |value|
+ options.amend = value
+ end
+
+ opts.on('-m', '--merge-request [integer]', Integer, 'Merge Request ID') do |value|
+ options.merge_request = value
+ end
+
+ opts.on('-n', '--dry-run', "Don't actually write anything, just print") do |value|
+ options.dry_run = value
+ end
+
+ opts.on('-u', '--git-username', 'Use Git user.name configuration as the author') do |value|
+ options.author = git_user_name if value
+ end
+
+ opts.on('-h', '--help', 'Print help message') do
+ puts opts
+ exit
+ end
+ end
+
+ parser.parse!(argv)
+
+ # Title is everything that remains, but let's clean it up a bit
+ options.title = argv.join(' ').strip.squeeze(' ').tr("\r\n", '')
+
+ options
+ end
+
+ def self.git_user_name
+ %x{git config user.name}.strip
+ end
+end
+
+class ChangelogEntry
+ attr_reader :options
+
+ def initialize(options)
+ @options = options
+
+ assert_feature_branch!
+ assert_new_file!
+ assert_title!
+
+ $stdout.puts "\e[32mcreate\e[0m #{file_path}"
+ $stdout.puts contents
+ unless options.dry_run
+ write
+ amend_commit if options.amend
+ end
+ end
+
+ def contents
+ YAML.dump(
+ 'title' => title,
+ 'merge_request' => options.merge_request,
+ 'author' => options.author
+ )
+ end
+
+ def write
+ File.write(file_path, contents)
+ end
+
+ def amend_commit
+ %x{git add #{file_path}}
+ exec("git commit --amend")
+ end
+
+ private
+
+ def fail_with(message)
+ $stderr.puts "\e[31merror\e[0m #{message}"
+ exit 1
+ end
+
+ def assert_feature_branch!
+ return unless branch_name == 'master'
+
+ fail_with "Create a branch first!"
+ end
+
+ def assert_new_file!
+ return unless File.exist?(file_path)
+
+ fail_with "#{file_path} already exists!"
+ end
+
+ def assert_title!
+ return if options.title.length > 0 || options.amend
+
+ fail_with "Provide a title for the changelog entry or use `--amend`" \
+ " to use the title from the previous commit."
+ end
+
+ def title
+ if options.title.empty?
+ last_commit_subject
+ else
+ options.title
+ end
+ end
+
+ def last_commit_subject
+ %x{git log --format="%s" -1}.strip
+ end
+
+ def file_path
+ File.join(
+ unreleased_path,
+ branch_name.gsub(/[^\w-]/, '-') << '.yml'
+ )
+ end
+
+ def unreleased_path
+ File.join('changelogs', 'unreleased').tap do |path|
+ path << '-ee' if ee?
+ end
+ end
+
+ def ee?
+ @ee ||= File.exist?(File.expand_path('../CHANGELOG-EE.md', __dir__))
+ end
+
+ def branch_name
+ @branch_name ||= %x{git symbolic-ref HEAD}.strip.sub(%r{\Arefs/heads/}, '')
+ end
+end
+
+if $0 == __FILE__
+ options = ChangelogOptionParser.parse(ARGV)
+ ChangelogEntry.new(options)
+end
+
+# vim: ft=ruby