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require 'open3'
require_relative 'gitlab_init'
require_relative 'gitlab_metrics'
class GitlabCustomHook
attr_reader :vars
def initialize(repo_path, key_id)
@repo_path = repo_path
@vars = { 'GL_ID' => key_id }
end
def pre_receive(changes)
GitlabMetrics.measure("pre-receive-hook") do
find_hooks('pre-receive').all? do |hook|
call_receive_hook(hook, changes)
end
end
end
def post_receive(changes)
GitlabMetrics.measure("post-receive-hook") do
find_hooks('post-receive').all? do |hook|
call_receive_hook(hook, changes)
end
end
end
def update(ref_name, old_value, new_value)
GitlabMetrics.measure("update-hook") do
find_hooks('update').all? do |hook|
system(vars, hook, ref_name, old_value, new_value)
end
end
end
private
def call_receive_hook(hook, changes)
# Prepare the hook subprocess. Attach a pipe to its stdin, and merge
# both its stdout and stderr into our own stdout.
stdin_reader, stdin_writer = IO.pipe
hook_pid = spawn(vars, hook, in: stdin_reader, err: :out)
stdin_reader.close
# Submit changes to the hook via its stdin.
begin
IO.copy_stream(StringIO.new(changes), stdin_writer)
rescue Errno::EPIPE
# It is not an error if the hook does not consume all of its input.
end
# Close the pipe to let the hook know there is no further input.
stdin_writer.close
Process.wait(hook_pid)
$?.success?
end
# lookup hook files in this order:
#
# 1. <repository>.git/custom_hooks/<hook_name> - per project hook
# 2. <repository>.git/custom_hooks/<hook_name>.d/* - per project hooks
# 3. <repository>.git/hooks/<hook_name>.d/* - global hooks
#
def find_hooks(hook_name)
hook_files = []
# <repository>.git/custom_hooks/<hook_name>
hook_file = File.join(@repo_path, 'custom_hooks', hook_name)
hook_files.push(hook_file) if File.executable?(hook_file)
# <repository>.git/custom_hooks/<hook_name>.d/*
hook_path = File.join(@repo_path, 'custom_hooks', "#{hook_name}.d")
hook_files += match_hook_files(hook_path)
# <repository>.git/hooks/<hook_name>.d/*
hook_path = File.join(@repo_path, 'hooks', "#{hook_name}.d")
hook_files += match_hook_files(hook_path)
hook_files
end
# match files from path:
# 1. file must be executable
# 2. file must not match backup file
#
# the resulting list is sorted
def match_hook_files(path)
return [] unless Dir.exist?(path)
Dir["#{path}/*"].select do |f|
!f.end_with?('~') && File.executable?(f)
end.sort
end
end
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