module Gitlab module Git # 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 BLANK_SHA = ('0' * 40).freeze TAG_REF_PREFIX = "refs/tags/".freeze BRANCH_REF_PREFIX = "refs/heads/".freeze CommandError = Class.new(StandardError) CommitError = Class.new(StandardError) OSError = Class.new(StandardError) class << self include Gitlab::EncodingHelper def ref_name(ref) encode!(ref).sub(%r{\Arefs/(tags|heads|remotes)/}, '') end def branch_name(ref) ref = ref.to_s if self.branch_ref?(ref) self.ref_name(ref) else nil end end def committer_hash(email:, name:) return if email.nil? || name.nil? { email: email, name: name, time: Time.now } end def tag_name(ref) ref = ref.to_s if self.tag_ref?(ref) self.ref_name(ref) else nil end end def tag_ref?(ref) ref.start_with?(TAG_REF_PREFIX) end def branch_ref?(ref) ref.start_with?(BRANCH_REF_PREFIX) end def blank_ref?(ref) ref == BLANK_SHA end def version Gitlab::VersionInfo.parse(Gitlab::Popen.popen(%W(#{Gitlab.config.git.bin_path} --version)).first) end def check_namespace!(*objects) expected_namespace = self.name + '::' objects.each do |object| unless object.class.name.start_with?(expected_namespace) raise ArgumentError, "expected object in #{expected_namespace}, got #{object}" end end end def diff_line_code(file_path, new_line_position, old_line_position) "#{Digest::SHA1.hexdigest(file_path)}_#{old_line_position}_#{new_line_position}" end def shas_eql?(sha1, sha2) return false if sha1.nil? || sha2.nil? return false unless sha1.class == sha2.class # If either of the shas is below the minimum length, we cannot be sure # that they actually refer to the same commit because of hash collision. length = [sha1.length, sha2.length].min return false if length < Gitlab::Git::Commit::MIN_SHA_LENGTH sha1[0, length] == sha2[0, length] end end end end