91 lines
3 KiB
Ruby
91 lines
3 KiB
Ruby
# frozen_string_literal: true
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module Projects
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# The CleanupService removes data from the project repository following a
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# BFG rewrite: https://rtyley.github.io/bfg-repo-cleaner/
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#
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# Before executing this service, all refs rewritten by BFG should have been
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# pushed to the repository
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class CleanupService < BaseService
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NoUploadError = StandardError.new("Couldn't find uploaded object map")
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include Gitlab::Utils::StrongMemoize
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# Attempt to clean up the project following the push. Warning: this is
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# destructive!
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#
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# path is the path of an upload of a BFG object map file. It contains a line
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# per rewritten object, with the old and new SHAs space-separated. It can be
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# used to update or remove content that references the objects that BFG has
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# altered
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def execute
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apply_bfg_object_map!
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# Remove older objects that are no longer referenced
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GitGarbageCollectWorker.new.perform(project.id, :gc)
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# The cache may now be inaccurate, and holding onto it could prevent
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# bugs assuming the presence of some object from manifesting for some
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# time. Better to feel the pain immediately.
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project.repository.expire_all_method_caches
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project.bfg_object_map.remove!
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end
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private
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def apply_bfg_object_map!
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raise NoUploadError unless project.bfg_object_map.exists?
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project.bfg_object_map.open do |io|
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repository_cleaner.apply_bfg_object_map_stream(io) do |response|
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cleanup_diffs(response)
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end
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end
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end
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def cleanup_diffs(response)
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old_commit_shas = extract_old_commit_shas(response.entries)
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ActiveRecord::Base.transaction do
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cleanup_merge_request_diffs(old_commit_shas)
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cleanup_note_diff_files(old_commit_shas)
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end
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end
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def extract_old_commit_shas(batch)
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batch.lazy.select { |entry| entry.type == :COMMIT }.map(&:old_oid).force
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end
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def cleanup_merge_request_diffs(old_commit_shas)
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merge_request_diffs = MergeRequestDiff
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.by_project_id(project.id)
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.by_commit_sha(old_commit_shas)
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# It's important to run the ActiveRecord callbacks here
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merge_request_diffs.destroy_all # rubocop:disable Cop/DestroyAll
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# TODO: ensure the highlight cache is removed immediately. It's too hard
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# to calculate the Redis keys at present.
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#
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# https://gitlab.com/gitlab-org/gitlab-ce/issues/61115
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end
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def cleanup_note_diff_files(old_commit_shas)
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# Pluck the IDs instead of running the query twice to ensure we clear the
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# cache for exactly the note diffs we remove
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ids = NoteDiffFile
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.referencing_sha(old_commit_shas, project_id: project.id)
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.pluck_primary_key
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NoteDiffFile.id_in(ids).delete_all
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# A highlighted version of the diff is stored in redis. Remove it now.
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Gitlab::DiscussionsDiff::HighlightCache.clear_multiple(ids)
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end
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def repository_cleaner
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@repository_cleaner ||= Gitlab::Git::RepositoryCleaner.new(repository.raw)
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end
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end
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end
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