require 'zlib' class BareRepoOperations # The ID of empty tree. # See http://stackoverflow.com/a/40884093/1856239 and https://github.com/git/git/blob/3ad8b5bf26362ac67c9020bf8c30eee54a84f56d/cache.h#L1011-L1012 EMPTY_TREE_ID = '4b825dc642cb6eb9a060e54bf8d69288fbee4904'.freeze include Gitlab::Popen def initialize(path_to_repo) @path_to_repo = path_to_repo end def commit_tree(tree_id, msg, parent: EMPTY_TREE_ID) commit_tree_args = ['commit-tree', tree_id, '-m', msg] commit_tree_args += ['-p', parent] unless parent == EMPTY_TREE_ID commit_id = execute(commit_tree_args) commit_id[0] end # Based on https://stackoverflow.com/a/25556917/1856239 def commit_file(file, dst_path, branch = 'master') head_id = execute(['show', '--format=format:%H', '--no-patch', branch], allow_failure: true)[0] || EMPTY_TREE_ID execute(['read-tree', '--empty']) execute(['read-tree', head_id]) blob_id = execute(['hash-object', '--stdin', '-w']) do |stdin| stdin.write(file.read) end execute(['update-index', '--add', '--cacheinfo', '100644', blob_id[0], dst_path]) tree_id = execute(['write-tree']) commit_id = commit_tree(tree_id[0], "Add #{dst_path}", parent: head_id) execute(['update-ref', "refs/heads/#{branch}", commit_id]) end private def execute(args, allow_failure: false) output, status = popen(base_args + args, nil) do |stdin| yield stdin if block_given? end unless status.zero? if allow_failure return [] else raise "Got a non-zero exit code while calling out `#{args.join(' ')}`: #{output}" end end output.split("\n") end def base_args [ Gitlab.config.git.bin_path, "--git-dir=#{@path_to_repo}" ] end end