94 lines
2.5 KiB
Ruby
94 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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require_dependency 'gitlab/encoding_helper'
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module Gitlab
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module Git
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# The ID of empty tree.
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# See http://stackoverflow.com/a/40884093/1856239 and
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# https://github.com/git/git/blob/3ad8b5bf26362ac67c9020bf8c30eee54a84f56d/cache.h#L1011-L1012
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EMPTY_TREE_ID = '4b825dc642cb6eb9a060e54bf8d69288fbee4904'
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BLANK_SHA = ('0' * 40).freeze
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COMMIT_ID = /\A[0-9a-f]{40}\z/.freeze
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TAG_REF_PREFIX = "refs/tags/"
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BRANCH_REF_PREFIX = "refs/heads/"
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CommandError = Class.new(BaseError)
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CommitError = Class.new(BaseError)
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OSError = Class.new(BaseError)
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UnknownRef = Class.new(BaseError)
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CommandTimedOut = Class.new(CommandError)
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class << self
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include Gitlab::EncodingHelper
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def ref_name(ref)
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encode!(ref).sub(%r{\Arefs/(tags|heads|remotes)/}, '')
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end
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def branch_name(ref)
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ref = ref.to_s
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if self.branch_ref?(ref)
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self.ref_name(ref)
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else
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nil
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end
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end
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def tag_name(ref)
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ref = ref.to_s
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if self.tag_ref?(ref)
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self.ref_name(ref)
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else
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nil
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end
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end
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def tag_ref?(ref)
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ref =~ /^#{TAG_REF_PREFIX}.+/
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end
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def branch_ref?(ref)
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ref =~ /^#{BRANCH_REF_PREFIX}.+/
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end
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def blank_ref?(ref)
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ref == BLANK_SHA
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end
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def commit_id?(ref)
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COMMIT_ID.match?(ref)
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end
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def version
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Gitlab::Git::Version.git_version
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end
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def check_namespace!(*objects)
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expected_namespace = self.name + '::'
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objects.each do |object|
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unless object.class.name.start_with?(expected_namespace)
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raise ArgumentError, "expected object in #{expected_namespace}, got #{object}"
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end
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end
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end
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def diff_line_code(file_path, new_line_position, old_line_position)
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"#{Digest::SHA1.hexdigest(file_path)}_#{old_line_position}_#{new_line_position}"
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end
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def shas_eql?(sha1, sha2)
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return true if sha1.nil? && sha2.nil?
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return false if sha1.nil? || sha2.nil?
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return false unless sha1.instance_of?(sha2.class)
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# If either of the shas is below the minimum length, we cannot be sure
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# that they actually refer to the same commit because of hash collision.
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length = [sha1.length, sha2.length].min
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return false if length < Gitlab::Git::Commit::MIN_SHA_LENGTH
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sha1[0, length] == sha2[0, length]
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end
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end
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end
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end
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