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# frozen_string_literal: true
# A collection of Commit instances for a specific container and Git reference.
class CommitCollection
include Enumerable
include Gitlab::Utils::StrongMemoize
attr_reader :container, :ref, :commits
delegate :repository, to: :container, allow_nil: true
delegate :project, to: :repository, allow_nil: true
# container - The object the commits belong to.
# commits - The Commit instances to store.
# ref - The name of the ref (e.g. "master").
def initialize(container, commits, ref = nil)
@container = container
@commits = commits
@ref = ref
end
def each(&block)
commits.each(&block)
end
def committers
emails = without_merge_commits.map(&:committer_email).uniq
User.by_any_email(emails)
end
def without_merge_commits
strong_memoize(:without_merge_commits) do
# `#enrich!` the collection to ensure all commits contain
# the necessary parent data
enrich!.commits.reject(&:merge_commit?)
end
end
# Returns the collection with the latest pipeline for every commit pre-set.
#
# Setting the pipeline for each commit ahead of time removes the need for running
# a query for every commit we're displaying.
def with_latest_pipeline(ref = nil)
return self unless project
pipelines = project.ci_pipelines.latest_pipeline_per_commit(map(&:id), ref)
each do |commit|
pipeline = pipelines[commit.id]
pipeline&.number_of_warnings # preload number of warnings
commit.set_latest_pipeline_for_ref(ref, pipeline)
end
self
end
# Returns the collection with markdown fields preloaded.
#
# Get the markdown cache from redis using pipeline to prevent n+1 requests
# when rendering the markdown of an attribute (e.g. title, full_title,
# description).
def with_markdown_cache
Commit.preload_markdown_cache!(commits)
self
end
def unenriched
commits.reject(&:gitaly_commit?)
end
def fully_enriched?
unenriched.empty?
end
# Batch load any commits that are not backed by full gitaly data, and
# replace them in the collection.
def enrich!
# A container is needed in order to fetch data from gitaly. Containers
# can be absent from commits in certain rare situations (like when
# viewing a MR of a deleted fork). In these cases, assume that the
# enriched data is not needed.
return self if container.blank? || fully_enriched?
# Batch load full Commits from the repository
# and map to a Hash of id => Commit
replacements = unenriched.each_with_object({}) do |c, result|
result[c.id] = Commit.lazy(container, c.id)
end.compact
# Replace the commits, keeping the same order
@commits = @commits.map do |original_commit|
# Return the original instance: if it didn't need to be batchloaded, it was
# already enriched.
batch_loaded_commit = replacements.fetch(original_commit.id, original_commit)
# If batch loading the commit failed, fall back to the original commit.
# We need to explicitly check `.nil?` since otherwise a `BatchLoader` instance
# that looks like `nil` is returned.
batch_loaded_commit.nil? ? original_commit : batch_loaded_commit
end
self
end
def respond_to_missing?(message, inc_private = false)
commits.respond_to?(message, inc_private)
end
# rubocop:disable GitlabSecurity/PublicSend
def method_missing(message, *args, &block)
commits.public_send(message, *args, &block)
end
end
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