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#!/usr/bin/env ruby
# frozen_string_literal: true
# We need to take some precautions when using the `gitlab` gem in this project.
#
# See https://docs.gitlab.com/ee/development/pipelines/internals.html#using-the-gitlab-ruby-gem-in-the-canonical-project.
require 'gitlab'
require 'pathname'
# This script saves the diffs of changes in an MR to the directory specified as the first argument
#
# It exits with a success code if diffs are found and saved, or if there are no changes, including if the script runs in
# a pipeline that is not for a merge request.
gitlab_token = ENV.fetch('PROJECT_TOKEN_FOR_CI_SCRIPTS_API_USAGE')
gitlab_endpoint = ENV.fetch('CI_API_V4_URL')
mr_project_path = ENV['CI_MERGE_REQUEST_PROJECT_PATH']
mr_iid = ENV['CI_MERGE_REQUEST_IID']
puts "CI_MERGE_REQUEST_PROJECT_PATH is missing." if mr_project_path.to_s.empty?
puts "CI_MERGE_REQUEST_IID is missing." if mr_iid.to_s.empty?
unless mr_project_path && mr_iid
puts "Exiting as this does not appear to be a merge request pipeline."
exit
end
abort("ERROR: Please specify a directory to write MR diffs into.") if ARGV.empty?
output_diffs_dir = Pathname.new(ARGV.shift).expand_path
Gitlab.configure do |config|
config.endpoint = gitlab_endpoint
config.private_token = gitlab_token
end
Gitlab.merge_request_changes(mr_project_path, mr_iid).changes.each do |change|
next if change['diff'].empty?
ext = change['deleted_file'] ? ".deleted.diff" : ".diff"
new_path = output_diffs_dir.join("#{change['new_path']}#{ext}")
new_path.dirname.mkpath
new_path.write(change['diff'])
end
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