129 lines
3.7 KiB
Ruby
129 lines
3.7 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Checks
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class ChangesAccess
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include Gitlab::Utils::StrongMemoize
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ATTRIBUTES = %i[user_access project protocol changes logger].freeze
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attr_reader(*ATTRIBUTES)
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def initialize(
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changes, user_access:, project:, protocol:, logger:
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)
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@changes = changes
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@user_access = user_access
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@project = project
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@protocol = protocol
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@logger = logger
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end
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def validate!
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return if changes.empty?
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single_access_checks!
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logger.log_timed("Running checks for #{changes.length} changes") do
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bulk_access_checks!
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end
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true
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end
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# All commits which have been newly introduced via any of the given
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# changes. This set may also contain commits which are not referenced by
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# any of the new revisions.
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def commits
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strong_memoize(:commits) do
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newrevs = @changes.map do |change|
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newrev = change[:newrev]
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next if blank_rev?(newrev)
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newrev
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end.compact
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next [] if newrevs.empty?
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project.repository.new_commits(newrevs)
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end
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end
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# All commits which have been newly introduced via the given revision.
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def commits_for(oldrev, newrev)
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commits_by_id = commits.index_by(&:id)
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result = []
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pending = Set[newrev]
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# We go up the parent chain of our newrev and collect all commits which
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# are new. In case a commit's ID cannot be found in the set of new
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# commits, then it must already be a preexisting commit.
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while pending.any?
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rev = pending.first
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pending.delete(rev)
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# Remove the revision from commit candidates such that we don't walk
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# it multiple times. If the hash doesn't contain the revision, then
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# we have either already walked the commit or it's not new.
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commit = commits_by_id.delete(rev)
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next if commit.nil?
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# Only add the parent ID to the pending set if we actually know its
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# commit to guards us against readding an ID which we have already
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# queued up before. Furthermore, we stop walking as soon as we hit
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# `oldrev` such that we do not include any commits in our checks
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# which have been "over-pushed" by the client.
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commit.parent_ids.each do |parent_id|
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pending.add(parent_id) if commits_by_id.has_key?(parent_id) && parent_id != oldrev
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end
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result << commit
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end
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result
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end
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def single_change_accesses
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@single_changes_accesses ||=
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changes.map do |change|
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commits =
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if blank_rev?(change[:newrev])
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[]
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else
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Gitlab::Lazy.new { commits_for(change[:oldrev], change[:newrev]) }
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end
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Checks::SingleChangeAccess.new(
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change,
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user_access: user_access,
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project: project,
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protocol: protocol,
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logger: logger,
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commits: commits
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)
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end
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end
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protected
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def single_access_checks!
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# Iterate over all changes to find if user allowed all of them to be applied
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single_change_accesses.each do |single_change_access|
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single_change_access.validate!
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end
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end
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def bulk_access_checks!
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Gitlab::Checks::LfsCheck.new(self).validate!
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end
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def blank_rev?(rev)
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rev.blank? || Gitlab::Git.blank_ref?(rev)
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end
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end
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end
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end
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Gitlab::Checks::ChangesAccess.prepend_mod_with('Gitlab::Checks::ChangesAccess')
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