debian-mirror-gitlab/lib/gitlab/git.rb

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# frozen_string_literal: true
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require_dependency 'gitlab/encoding_helper'
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module Gitlab
module Git
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# The ID of empty tree.
# See http://stackoverflow.com/a/40884093/1856239 and
# 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/"
BRANCH_REF_PREFIX = "refs/heads/"
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BaseError = Class.new(StandardError)
CommandError = Class.new(BaseError)
CommitError = Class.new(BaseError)
OSError = Class.new(BaseError)
UnknownRef = Class.new(BaseError)
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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)
ref = ref.to_s
if self.branch_ref?(ref)
self.ref_name(ref)
else
nil
end
end
def tag_name(ref)
ref = ref.to_s
if self.tag_ref?(ref)
self.ref_name(ref)
else
nil
end
end
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def tag_ref?(ref)
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ref =~ /^#{TAG_REF_PREFIX}.+/
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end
def branch_ref?(ref)
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ref =~ /^#{BRANCH_REF_PREFIX}.+/
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end
def blank_ref?(ref)
ref == BLANK_SHA
end
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def commit_id?(ref)
COMMIT_ID.match?(ref)
end
def version
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Gitlab::Git::Version.git_version
end
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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)
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return true if sha1.nil? && sha2.nil?
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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
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end
end
end