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|
module Gitlab
module Git
class OperationService
include Gitlab::Git::Popen
BranchUpdate = Struct.new(:newrev, :repo_created, :branch_created) do
alias_method :repo_created?, :repo_created
alias_method :branch_created?, :branch_created
def self.from_gitaly(branch_update)
new(
branch_update.commit_id,
branch_update.repo_created,
branch_update.branch_created
)
end
end
attr_reader :user, :repository
def initialize(user, new_repository)
if user
user = Gitlab::Git::User.from_gitlab(user) unless user.respond_to?(:gl_id)
@user = user
end
# Refactoring aid
Gitlab::Git.check_namespace!(new_repository)
@repository = new_repository
end
def add_branch(branch_name, newrev)
ref = Gitlab::Git::BRANCH_REF_PREFIX + branch_name
oldrev = Gitlab::Git::BLANK_SHA
update_ref_in_hooks(ref, newrev, oldrev)
end
def rm_branch(branch)
ref = Gitlab::Git::BRANCH_REF_PREFIX + branch.name
oldrev = branch.target
newrev = Gitlab::Git::BLANK_SHA
update_ref_in_hooks(ref, newrev, oldrev)
end
def add_tag(tag_name, newrev, options = {})
ref = Gitlab::Git::TAG_REF_PREFIX + tag_name
oldrev = Gitlab::Git::BLANK_SHA
with_hooks(ref, newrev, oldrev) do |service|
# We want to pass the OID of the tag object to the hooks. For an
# annotated tag we don't know that OID until after the tag object
# (raw_tag) is created in the repository. That is why we have to
# update the value after creating the tag object. Only the
# "post-receive" hook will receive the correct value in this case.
raw_tag = repository.rugged.tags.create(tag_name, newrev, options)
service.newrev = raw_tag.target_id
end
end
def rm_tag(tag)
ref = Gitlab::Git::TAG_REF_PREFIX + tag.name
oldrev = tag.target
newrev = Gitlab::Git::BLANK_SHA
update_ref_in_hooks(ref, newrev, oldrev) do
repository.rugged.tags.delete(tag_name)
end
end
# Whenever `start_branch_name` is passed, if `branch_name` doesn't exist,
# it would be created from `start_branch_name`.
# If `start_repository` is passed, and the branch doesn't exist,
# it would try to find the commits from it instead of current repository.
def with_branch(
branch_name,
start_branch_name: nil,
start_repository: repository,
&block)
Gitlab::Git.check_namespace!(start_repository)
start_repository = RemoteRepository.new(start_repository) unless start_repository.is_a?(RemoteRepository)
start_branch_name = nil if start_repository.empty?
if start_branch_name && !start_repository.branch_exists?(start_branch_name)
raise ArgumentError, "Cannot find branch #{start_branch_name} in #{start_repository.relative_path}"
end
update_branch_with_hooks(branch_name) do
repository.with_repo_branch_commit(
start_repository,
start_branch_name || branch_name,
&block)
end
end
def update_branch(branch_name, newrev, oldrev)
ref = Gitlab::Git::BRANCH_REF_PREFIX + branch_name
update_ref_in_hooks(ref, newrev, oldrev)
end
private
# Returns [newrev, should_run_after_create, should_run_after_create_branch]
def update_branch_with_hooks(branch_name)
update_autocrlf_option
was_empty = repository.empty?
# Make commit
newrev = yield
unless newrev
raise Gitlab::Git::CommitError.new('Failed to create commit')
end
branch = repository.find_branch(branch_name)
oldrev = find_oldrev_from_branch(newrev, branch)
ref = Gitlab::Git::BRANCH_REF_PREFIX + branch_name
update_ref_in_hooks(ref, newrev, oldrev)
BranchUpdate.new(newrev, was_empty, was_empty || Gitlab::Git.blank_ref?(oldrev))
end
def find_oldrev_from_branch(newrev, branch)
return Gitlab::Git::BLANK_SHA unless branch
oldrev = branch.target
merge_base = repository.merge_base(newrev, branch.target)
raise Gitlab::Git::Repository::InvalidRef unless merge_base
if oldrev == merge_base
oldrev
else
raise Gitlab::Git::CommitError.new('Branch diverged')
end
end
def update_ref_in_hooks(ref, newrev, oldrev)
with_hooks(ref, newrev, oldrev) do
update_ref(ref, newrev, oldrev)
end
end
def with_hooks(ref, newrev, oldrev)
Gitlab::Git::HooksService.new.execute(
user,
repository,
oldrev,
newrev,
ref) do |service|
yield(service)
end
end
# Gitaly note: JV: wait with migrating #update_ref until we know how to migrate its call sites.
def update_ref(ref, newrev, oldrev)
# We use 'git update-ref' because libgit2/rugged currently does not
# offer 'compare and swap' ref updates. Without compare-and-swap we can
# (and have!) accidentally reset the ref to an earlier state, clobbering
# commits. See also https://github.com/libgit2/libgit2/issues/1534.
command = %W[#{Gitlab.config.git.bin_path} update-ref --stdin -z]
output, status = popen(
command,
repository.path) do |stdin|
stdin.write("update #{ref}\x00#{newrev}\x00#{oldrev}\x00")
end
unless status.zero?
Gitlab::GitLogger.error("'git update-ref' in #{repository.path}: #{output}")
raise Gitlab::Git::CommitError.new(
"Could not update branch #{Gitlab::Git.branch_name(ref)}." \
" Please refresh and try again.")
end
end
def update_autocrlf_option
if repository.autocrlf != :input
repository.autocrlf = :input
end
end
end
end
end
|
