debian-mirror-gitlab/app/models/repository.rb
2018-03-27 19:54:05 +05:30

984 lines
25 KiB
Ruby

require 'securerandom'
class Repository
REF_MERGE_REQUEST = 'merge-requests'.freeze
REF_KEEP_AROUND = 'keep-around'.freeze
REF_ENVIRONMENTS = 'environments'.freeze
MAX_DIVERGING_COUNT = 1000
RESERVED_REFS_NAMES = %W[
heads
tags
replace
#{REF_ENVIRONMENTS}
#{REF_KEEP_AROUND}
#{REF_ENVIRONMENTS}
].freeze
include Gitlab::ShellAdapter
include Gitlab::RepositoryCacheAdapter
attr_accessor :full_path, :disk_path, :project, :is_wiki
delegate :ref_name_for_sha, to: :raw_repository
delegate :bundle_to_disk, :create_from_bundle, to: :raw_repository
CreateTreeError = Class.new(StandardError)
# Methods that cache data from the Git repository.
#
# Each entry in this Array should have a corresponding method with the exact
# same name. The cache key used by those methods must also match method's
# name.
#
# For example, for entry `:commit_count` there's a method called `commit_count` which
# stores its data in the `commit_count` cache key.
CACHED_METHODS = %i(size commit_count rendered_readme contribution_guide
changelog license_blob license_key gitignore koding_yml
gitlab_ci_yml branch_names tag_names branch_count
tag_count avatar exists? root_ref has_visible_content?
issue_template_names merge_request_template_names).freeze
# Methods that use cache_method but only memoize the value
MEMOIZED_CACHED_METHODS = %i(license).freeze
# Certain method caches should be refreshed when certain types of files are
# changed. This Hash maps file types (as returned by Gitlab::FileDetector) to
# the corresponding methods to call for refreshing caches.
METHOD_CACHES_FOR_FILE_TYPES = {
readme: :rendered_readme,
changelog: :changelog,
license: %i(license_blob license_key license),
contributing: :contribution_guide,
gitignore: :gitignore,
koding: :koding_yml,
gitlab_ci: :gitlab_ci_yml,
avatar: :avatar,
issue_template: :issue_template_names,
merge_request_template: :merge_request_template_names
}.freeze
def initialize(full_path, project, disk_path: nil, is_wiki: false)
@full_path = full_path
@disk_path = disk_path || full_path
@project = project
@commit_cache = {}
@is_wiki = is_wiki
end
def ==(other)
@disk_path == other.disk_path
end
def raw_repository
return nil unless full_path
@raw_repository ||= initialize_raw_repository
end
alias_method :raw, :raw_repository
def cleanup
@raw_repository&.cleanup
end
# Return absolute path to repository
def path_to_repo
@path_to_repo ||= File.expand_path(
File.join(repository_storage_path, disk_path + '.git')
)
end
def inspect
"#<#{self.class.name}:#{@disk_path}>"
end
def create_hooks
Gitlab::Git::Repository.create_hooks(path_to_repo, Gitlab.config.gitlab_shell.hooks_path)
end
def commit(ref = 'HEAD')
return nil unless exists?
return ref if ref.is_a?(::Commit)
find_commit(ref)
end
# Finding a commit by the passed SHA
# Also takes care of caching, based on the SHA
def commit_by(oid:)
return @commit_cache[oid] if @commit_cache.key?(oid)
@commit_cache[oid] = find_commit(oid)
end
def commits_by(oids:)
return [] unless oids.present?
commits = Gitlab::Git::Commit.batch_by_oid(raw_repository, oids)
if commits.present?
Commit.decorate(commits, @project)
else
[]
end
end
def commits(ref = nil, path: nil, limit: nil, offset: nil, skip_merges: false, after: nil, before: nil, all: nil)
options = {
repo: raw_repository,
ref: ref,
path: path,
limit: limit,
offset: offset,
after: after,
before: before,
follow: Array(path).length == 1,
skip_merges: skip_merges,
all: all
}
commits = Gitlab::Git::Commit.where(options)
commits = Commit.decorate(commits, @project) if commits.present?
CommitCollection.new(project, commits, ref)
end
def commits_between(from, to)
commits = Gitlab::Git::Commit.between(raw_repository, from, to)
commits = Commit.decorate(commits, @project) if commits.present?
commits
end
# Returns a list of commits that are not present in any reference
def new_commits(newrev)
refs = ::Gitlab::Git::RevList.new(raw, newrev: newrev).new_refs
refs.map { |sha| commit(sha.strip) }
end
# Gitaly migration: https://gitlab.com/gitlab-org/gitaly/issues/384
def find_commits_by_message(query, ref = nil, path = nil, limit = 1000, offset = 0)
unless exists? && has_visible_content? && query.present?
return []
end
commits = raw_repository.find_commits_by_message(query, ref, path, limit, offset).map do |c|
commit(c)
end
CommitCollection.new(project, commits, ref)
end
def find_branch(name, fresh_repo: true)
raw_repository.find_branch(name, fresh_repo)
end
def find_tag(name)
tags.find { |tag| tag.name == name }
end
def add_branch(user, branch_name, ref)
branch = raw_repository.add_branch(branch_name, user: user, target: ref)
after_create_branch
branch
rescue Gitlab::Git::Repository::InvalidRef
false
end
def add_tag(user, tag_name, target, message = nil)
raw_repository.add_tag(tag_name, user: user, target: target, message: message)
rescue Gitlab::Git::Repository::InvalidRef
false
end
def rm_branch(user, branch_name)
before_remove_branch
raw_repository.rm_branch(branch_name, user: user)
after_remove_branch
true
end
def rm_tag(user, tag_name)
before_remove_tag
raw_repository.rm_tag(tag_name, user: user)
after_remove_tag
true
end
def ref_names
branch_names + tag_names
end
def branch_exists?(branch_name)
return false unless raw_repository
branch_names.include?(branch_name)
end
def tag_exists?(tag_name)
return false unless raw_repository
tag_names.include?(tag_name)
end
def ref_exists?(ref)
!!raw_repository&.ref_exists?(ref)
rescue ArgumentError
false
end
# Makes sure a commit is kept around when Git garbage collection runs.
# Git GC will delete commits from the repository that are no longer in any
# branches or tags, but we want to keep some of these commits around, for
# example if they have comments or CI builds.
def keep_around(sha)
return unless sha.present? && commit_by(oid: sha)
return if kept_around?(sha)
# This will still fail if the file is corrupted (e.g. 0 bytes)
raw_repository.write_ref(keep_around_ref_name(sha), sha, shell: false)
rescue Gitlab::Git::CommandError => ex
Rails.logger.error "Unable to create keep-around reference for repository #{path}: #{ex}"
end
def kept_around?(sha)
ref_exists?(keep_around_ref_name(sha))
end
def diverging_commit_counts(branch)
root_ref_hash = raw_repository.commit(root_ref).id
cache.fetch(:"diverging_commit_counts_#{branch.name}") do
# Rugged seems to throw a `ReferenceError` when given branch_names rather
# than SHA-1 hashes
number_commits_behind, number_commits_ahead =
raw_repository.count_commits_between(
root_ref_hash,
branch.dereferenced_target.sha,
left_right: true,
max_count: MAX_DIVERGING_COUNT)
{ behind: number_commits_behind, ahead: number_commits_ahead }
end
end
def expire_tags_cache
expire_method_caches(%i(tag_names tag_count))
@tags = nil
end
def expire_branches_cache
expire_method_caches(%i(branch_names branch_count has_visible_content?))
@local_branches = nil
@branch_exists_memo = nil
end
def expire_statistics_caches
expire_method_caches(%i(size commit_count))
end
def expire_all_method_caches
expire_method_caches(CACHED_METHODS)
end
def expire_avatar_cache
expire_method_caches(%i(avatar))
end
# Refreshes the method caches of this repository.
#
# types - An Array of file types (e.g. `:readme`) used to refresh extra
# caches.
def refresh_method_caches(types)
to_refresh = []
types.each do |type|
methods = METHOD_CACHES_FOR_FILE_TYPES[type.to_sym]
to_refresh.concat(Array(methods)) if methods
end
expire_method_caches(to_refresh)
to_refresh.each { |method| send(method) } # rubocop:disable GitlabSecurity/PublicSend
end
def expire_branch_cache(branch_name = nil)
# When we push to the root branch we have to flush the cache for all other
# branches as their statistics are based on the commits relative to the
# root branch.
if !branch_name || branch_name == root_ref
branches.each do |branch|
cache.expire(:"diverging_commit_counts_#{branch.name}")
cache.expire(:"commit_count_#{branch.name}")
end
# In case a commit is pushed to a non-root branch we only have to flush the
# cache for said branch.
else
cache.expire(:"diverging_commit_counts_#{branch_name}")
cache.expire(:"commit_count_#{branch_name}")
end
end
def expire_root_ref_cache
expire_method_caches(%i(root_ref))
end
# Expires the cache(s) used to determine if a repository is empty or not.
def expire_emptiness_caches
return unless empty?
expire_method_caches(%i(has_visible_content?))
end
def lookup_cache
@lookup_cache ||= {}
end
def expire_exists_cache
expire_method_caches(%i(exists?))
end
# expire cache that doesn't depend on repository data (when expiring)
def expire_content_cache
expire_tags_cache
expire_branches_cache
expire_root_ref_cache
expire_emptiness_caches
expire_exists_cache
expire_statistics_caches
end
# Runs code after a repository has been created.
def after_create
expire_exists_cache
expire_root_ref_cache
expire_emptiness_caches
repository_event(:create_repository)
end
# Runs code just before a repository is deleted.
def before_delete
expire_exists_cache
expire_all_method_caches
expire_branch_cache if exists?
expire_content_cache
repository_event(:remove_repository)
end
# Runs code just before the HEAD of a repository is changed.
def before_change_head
# Cached divergent commit counts are based on repository head
expire_branch_cache
expire_root_ref_cache
repository_event(:change_default_branch)
end
# Runs code before pushing (= creating or removing) a tag.
def before_push_tag
expire_statistics_caches
expire_emptiness_caches
expire_tags_cache
repository_event(:push_tag)
end
# Runs code before removing a tag.
def before_remove_tag
expire_tags_cache
expire_statistics_caches
repository_event(:remove_tag)
end
# Runs code after removing a tag.
def after_remove_tag
expire_tags_cache
end
# Runs code after the HEAD of a repository is changed.
def after_change_head
expire_method_caches(METHOD_CACHES_FOR_FILE_TYPES.keys)
end
# Runs code after a repository has been forked/imported.
def after_import
expire_content_cache
end
# Runs code after a new commit has been pushed.
def after_push_commit(branch_name)
expire_statistics_caches
expire_branch_cache(branch_name)
repository_event(:push_commit, branch: branch_name)
end
# Runs code after a new branch has been created.
def after_create_branch
expire_branches_cache
repository_event(:push_branch)
end
# Runs code before removing an existing branch.
def before_remove_branch
expire_branches_cache
repository_event(:remove_branch)
end
# Runs code after an existing branch has been removed.
def after_remove_branch
expire_branches_cache
end
def method_missing(m, *args, &block)
if m == :lookup && !block_given?
lookup_cache[m] ||= {}
lookup_cache[m][args.join(":")] ||= raw_repository.__send__(m, *args, &block) # rubocop:disable GitlabSecurity/PublicSend
else
raw_repository.__send__(m, *args, &block) # rubocop:disable GitlabSecurity/PublicSend
end
end
def respond_to_missing?(method, include_private = false)
raw_repository.respond_to?(method, include_private) || super
end
def blob_at(sha, path)
Blob.decorate(raw_repository.blob_at(sha, path), project)
rescue Gitlab::Git::Repository::NoRepository
nil
end
# items is an Array like: [[oid, path], [oid1, path1]]
def blobs_at(items)
raw_repository.batch_blobs(items).map { |blob| Blob.decorate(blob, project) }
end
def root_ref
# When the repo does not exist, or there is no root ref, we raise this error so no data is cached.
raw_repository&.root_ref or raise Gitlab::Git::Repository::NoRepository # rubocop:disable Style/AndOr
end
cache_method :root_ref
# Gitaly migration: https://gitlab.com/gitlab-org/gitaly/issues/314
def exists?
return false unless full_path
raw_repository.exists?
end
cache_method :exists?
# We don't need to cache the output of this method because both exists? and
# has_visible_content? are already memoized and cached. There's no guarantee
# that the values are expired and loaded atomically.
def empty?
return true unless exists?
!has_visible_content?
end
# The size of this repository in megabytes.
def size
exists? ? raw_repository.size : 0.0
end
cache_method :size, fallback: 0.0
def commit_count
root_ref ? raw_repository.commit_count(root_ref) : 0
end
cache_method :commit_count, fallback: 0
def commit_count_for_ref(ref)
return 0 unless exists?
cache.fetch(:"commit_count_#{ref}") { raw_repository.commit_count(ref) }
end
delegate :branch_names, to: :raw_repository
cache_method :branch_names, fallback: []
delegate :tag_names, to: :raw_repository
cache_method :tag_names, fallback: []
delegate :branch_count, :tag_count, :has_visible_content?, to: :raw_repository
cache_method :branch_count, fallback: 0
cache_method :tag_count, fallback: 0
cache_method :has_visible_content?, fallback: false
def avatar
# n+1: https://gitlab.com/gitlab-org/gitlab-ce/issues/38327
Gitlab::GitalyClient.allow_n_plus_1_calls do
if tree = file_on_head(:avatar)
tree.path
end
end
end
cache_method :avatar
def issue_template_names
Gitlab::Template::IssueTemplate.dropdown_names(project)
end
cache_method :issue_template_names, fallback: []
def merge_request_template_names
Gitlab::Template::MergeRequestTemplate.dropdown_names(project)
end
cache_method :merge_request_template_names, fallback: []
def readme
if readme = tree(:head)&.readme
ReadmeBlob.new(readme, self)
end
end
def rendered_readme
MarkupHelper.markup_unsafe(readme.name, readme.data, project: project) if readme
end
cache_method :rendered_readme
def contribution_guide
file_on_head(:contributing)
end
cache_method :contribution_guide
def changelog
file_on_head(:changelog)
end
cache_method :changelog
def license_blob
file_on_head(:license)
end
cache_method :license_blob
def license_key
return unless exists?
raw_repository.license_short_name
end
cache_method :license_key
def license
return unless license_key
Licensee::License.new(license_key)
end
cache_method :license, memoize_only: true
def gitignore
file_on_head(:gitignore)
end
cache_method :gitignore
def koding_yml
file_on_head(:koding)
end
cache_method :koding_yml
def gitlab_ci_yml
file_on_head(:gitlab_ci)
end
cache_method :gitlab_ci_yml
def head_commit
@head_commit ||= commit(self.root_ref)
end
def head_tree
if head_commit
@head_tree ||= Tree.new(self, head_commit.sha, nil)
end
end
def tree(sha = :head, path = nil, recursive: false)
if sha == :head
return unless head_commit
if path.nil?
return head_tree
else
sha = head_commit.sha
end
end
Tree.new(self, sha, path, recursive: recursive)
end
def blob_at_branch(branch_name, path)
last_commit = commit(branch_name)
if last_commit
blob_at(last_commit.sha, path)
else
nil
end
end
def last_commit_for_path(sha, path)
commit = raw_repository.last_commit_for_path(sha, path)
::Commit.new(commit, @project) if commit
end
def last_commit_id_for_path(sha, path)
key = path.blank? ? "last_commit_id_for_path:#{sha}" : "last_commit_id_for_path:#{sha}:#{Digest::SHA1.hexdigest(path)}"
cache.fetch(key) do
last_commit_for_path(sha, path)&.id
end
end
def next_branch(name, opts = {})
branch_ids = self.branch_names.map do |n|
next 1 if n == name
result = n.match(/\A#{name}-([0-9]+)\z/)
result[1].to_i if result
end.compact
highest_branch_id = branch_ids.max || 0
return name if opts[:mild] && 0 == highest_branch_id
"#{name}-#{highest_branch_id + 1}"
end
def branches_sorted_by(value)
raw_repository.local_branches(sort_by: value)
end
def tags_sorted_by(value)
case value
when 'name_asc'
VersionSorter.sort(tags) { |tag| tag.name }
when 'name_desc'
VersionSorter.rsort(tags) { |tag| tag.name }
when 'updated_desc'
tags_sorted_by_committed_date.reverse
when 'updated_asc'
tags_sorted_by_committed_date
else
tags
end
end
# Params:
#
# order_by: name|email|commits
# sort: asc|desc default: 'asc'
def contributors(order_by: nil, sort: 'asc')
commits = self.commits(nil, limit: 2000, offset: 0, skip_merges: true)
commits = commits.group_by(&:author_email).map do |email, commits|
contributor = Gitlab::Contributor.new
contributor.email = email
commits.each do |commit|
if contributor.name.blank?
contributor.name = commit.author_name
end
contributor.commits += 1
end
contributor
end
Commit.order_by(collection: commits, order_by: order_by, sort: sort)
end
def branch_names_contains(sha)
raw_repository.branch_names_contains_sha(sha)
end
def tag_names_contains(sha)
raw_repository.tag_names_contains_sha(sha)
end
def local_branches
@local_branches ||= raw_repository.local_branches
end
alias_method :branches, :local_branches
def tags
@tags ||= raw_repository.tags
end
def create_dir(user, path, **options)
options[:actions] = [{ action: :create_dir, file_path: path }]
multi_action(user, **options)
end
def create_file(user, path, content, **options)
options[:actions] = [{ action: :create, file_path: path, content: content }]
multi_action(user, **options)
end
def update_file(user, path, content, **options)
previous_path = options.delete(:previous_path)
action = previous_path && previous_path != path ? :move : :update
options[:actions] = [{ action: action, file_path: path, previous_path: previous_path, content: content }]
multi_action(user, **options)
end
def delete_file(user, path, **options)
options[:actions] = [{ action: :delete, file_path: path }]
multi_action(user, **options)
end
def with_cache_hooks
result = yield
return unless result
after_create if result.repo_created?
after_create_branch if result.branch_created?
result.newrev
end
def multi_action(user, **options)
start_project = options.delete(:start_project)
if start_project
options[:start_repository] = start_project.repository.raw_repository
end
with_cache_hooks { raw.multi_action(user, **options) }
end
def merge(user, source_sha, merge_request, message)
with_cache_hooks do
raw_repository.merge(user, source_sha, merge_request.target_branch, message) do |commit_id|
merge_request.update(in_progress_merge_commit_sha: commit_id)
nil # Return value does not matter.
end
end
end
def ff_merge(user, source, target_branch, merge_request: nil)
their_commit_id = commit(source)&.id
raise 'Invalid merge source' if their_commit_id.nil?
merge_request&.update(in_progress_merge_commit_sha: their_commit_id)
with_cache_hooks { raw.ff_merge(user, their_commit_id, target_branch) }
end
def revert(
user, commit, branch_name, message,
start_branch_name: nil, start_project: project)
with_cache_hooks do
raw_repository.revert(
user: user,
commit: commit.raw,
branch_name: branch_name,
message: message,
start_branch_name: start_branch_name,
start_repository: start_project.repository.raw_repository
)
end
end
def cherry_pick(
user, commit, branch_name, message,
start_branch_name: nil, start_project: project)
with_cache_hooks do
raw_repository.cherry_pick(
user: user,
commit: commit.raw,
branch_name: branch_name,
message: message,
start_branch_name: start_branch_name,
start_repository: start_project.repository.raw_repository
)
end
end
def merged_to_root_ref?(branch_or_name)
branch = Gitlab::Git::Branch.find(self, branch_or_name)
if branch
same_head = branch.target == root_ref_sha
merged = ancestor?(branch.target, root_ref_sha)
!same_head && merged
else
nil
end
end
def root_ref_sha
@root_ref_sha ||= commit(root_ref).sha
end
delegate :merged_branch_names, :can_be_merged?, to: :raw_repository
def merge_base(first_commit_id, second_commit_id)
first_commit_id = commit(first_commit_id).try(:id) || first_commit_id
second_commit_id = commit(second_commit_id).try(:id) || second_commit_id
raw_repository.merge_base(first_commit_id, second_commit_id)
end
def ancestor?(ancestor_id, descendant_id)
return false if ancestor_id.nil? || descendant_id.nil?
raw_repository.ancestor?(ancestor_id, descendant_id)
end
def fetch_as_mirror(url, forced: false, refmap: :all_refs, remote_name: nil, prune: true)
unless remote_name
remote_name = "tmp-#{SecureRandom.hex}"
tmp_remote_name = true
end
add_remote(remote_name, url, mirror_refmap: refmap)
fetch_remote(remote_name, forced: forced, prune: prune)
ensure
remove_remote(remote_name) if tmp_remote_name
end
def fetch_remote(remote, forced: false, ssh_auth: nil, no_tags: false, prune: true)
gitlab_shell.fetch_remote(raw_repository, remote, ssh_auth: ssh_auth, forced: forced, no_tags: no_tags, prune: prune)
end
def fetch_source_branch!(source_repository, source_branch, local_ref)
raw_repository.fetch_source_branch!(source_repository.raw_repository, source_branch, local_ref)
end
def compare_source_branch(target_branch_name, source_repository, source_branch_name, straight:)
raw_repository.compare_source_branch(target_branch_name, source_repository.raw_repository, source_branch_name, straight: straight)
end
def create_ref(ref, ref_path)
raw_repository.write_ref(ref_path, ref)
end
def ls_files(ref)
actual_ref = ref || root_ref
raw_repository.ls_files(actual_ref)
end
def search_files_by_content(query, ref)
return [] if empty? || query.blank?
raw_repository.search_files_by_content(query, ref)
end
def search_files_by_name(query, ref)
return [] if empty?
raw_repository.search_files_by_name(query, ref)
end
def copy_gitattributes(ref)
actual_ref = ref || root_ref
begin
raw_repository.copy_gitattributes(actual_ref)
true
rescue Gitlab::Git::Repository::InvalidRef
false
end
end
def file_on_head(type)
if head = tree(:head)
head.blobs.find do |blob|
Gitlab::FileDetector.type_of(blob.path) == type
end
end
end
def route_map_for(sha)
blob_data_at(sha, '.gitlab/route-map.yml')
end
def gitlab_ci_yml_for(sha, path = '.gitlab-ci.yml')
blob_data_at(sha, path)
end
def fetch_ref(source_repository, source_ref:, target_ref:)
raw_repository.fetch_ref(source_repository.raw_repository, source_ref: source_ref, target_ref: target_ref)
end
def repository_storage_path
@project.repository_storage_path
end
def rebase(user, merge_request)
raw.rebase(user, merge_request.id, branch: merge_request.source_branch,
branch_sha: merge_request.source_branch_sha,
remote_repository: merge_request.target_project.repository.raw,
remote_branch: merge_request.target_branch)
end
private
# TODO Generice finder, later split this on finders by Ref or Oid
# gitlab-org/gitlab-ce#39239
def find_commit(oid_or_ref)
commit = if oid_or_ref.is_a?(Gitlab::Git::Commit)
oid_or_ref
else
Gitlab::Git::Commit.find(raw_repository, oid_or_ref)
end
::Commit.new(commit, @project) if commit
end
def blob_data_at(sha, path)
blob = blob_at(sha, path)
return unless blob
blob.load_all_data!
blob.data
end
def cache
@cache ||= Gitlab::RepositoryCache.new(self)
end
def tags_sorted_by_committed_date
tags.sort_by do |tag|
# Annotated tags can point to any object (e.g. a blob), but generally
# tags point to a commit. If we don't have a commit, then just default
# to putting the tag at the end of the list.
target = tag.dereferenced_target
if target
target.committed_date
else
Time.now
end
end
end
def keep_around_ref_name(sha)
"refs/#{REF_KEEP_AROUND}/#{sha}"
end
def repository_event(event, tags = {})
Gitlab::Metrics.add_event(event, { path: full_path }.merge(tags))
end
def initialize_raw_repository
Gitlab::Git::Repository.new(project.repository_storage, disk_path + '.git', Gitlab::GlRepository.gl_repository(project, is_wiki))
end
end