322 lines
9.1 KiB
Ruby
322 lines
9.1 KiB
Ruby
# frozen_string_literal: true
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class MergeRequestDiff < ActiveRecord::Base
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include Sortable
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include Importable
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include ManualInverseAssociation
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include IgnorableColumn
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include EachBatch
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# Don't display more than 100 commits at once
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COMMITS_SAFE_SIZE = 100
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ignore_column :st_commits,
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:st_diffs
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belongs_to :merge_request
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manual_inverse_association :merge_request, :merge_request_diff
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has_many :merge_request_diff_files, -> { order(:merge_request_diff_id, :relative_order) }
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has_many :merge_request_diff_commits, -> { order(:merge_request_diff_id, :relative_order) }
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state_machine :state, initial: :empty do
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event :clean do
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transition any => :without_files
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end
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state :collected
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state :overflow
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# Diff files have been deleted by the system
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state :without_files
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# Deprecated states: these are no longer used but these values may still occur
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# in the database.
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state :timeout
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state :overflow_commits_safe_size
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state :overflow_diff_files_limit
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state :overflow_diff_lines_limit
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end
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scope :with_files, -> { without_states(:without_files, :empty) }
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scope :viewable, -> { without_state(:empty) }
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scope :by_commit_sha, ->(sha) do
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joins(:merge_request_diff_commits).where(merge_request_diff_commits: { sha: sha }).reorder(nil)
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end
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scope :recent, -> { order(id: :desc).limit(100) }
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# All diff information is collected from repository after object is created.
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# It allows you to override variables like head_commit_sha before getting diff.
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after_create :save_git_content, unless: :importing?
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def self.find_by_diff_refs(diff_refs)
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find_by(start_commit_sha: diff_refs.start_sha, head_commit_sha: diff_refs.head_sha, base_commit_sha: diff_refs.base_sha)
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end
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def viewable?
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collected? || without_files? || overflow?
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end
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# Collect information about commits and diff from repository
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# and save it to the database as serialized data
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def save_git_content
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MergeRequest
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.where('id = ? AND COALESCE(latest_merge_request_diff_id, 0) < ?', self.merge_request_id, self.id)
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.update_all(latest_merge_request_diff_id: self.id)
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ensure_commit_shas
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save_commits
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save_diffs
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save
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keep_around_commits
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end
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def ensure_commit_shas
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self.start_commit_sha ||= merge_request.target_branch_sha
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self.head_commit_sha ||= merge_request.source_branch_sha
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self.base_commit_sha ||= find_base_sha
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end
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# Override head_commit_sha to keep compatibility with merge request diff
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# created before version 8.4 that does not store head_commit_sha in separate db field.
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def head_commit_sha
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if persisted? && super.nil?
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last_commit_sha
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else
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super
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end
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end
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# This method will rely on repository branch sha
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# in case start_commit_sha is nil. Its necesarry for old merge request diff
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# created before version 8.4 to work
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def safe_start_commit_sha
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start_commit_sha || merge_request.target_branch_sha
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end
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def size
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real_size.presence || raw_diffs.size
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end
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def raw_diffs(options = {})
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if options[:ignore_whitespace_change]
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@diffs_no_whitespace ||= compare.diffs(options)
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else
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@raw_diffs ||= {}
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@raw_diffs[options] ||= load_diffs(options)
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end
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end
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def commits
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@commits ||= load_commits
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end
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def last_commit_sha
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commit_shas.first
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end
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def first_commit
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commits.last
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end
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def base_commit
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return unless base_commit_sha
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project.commit_by(oid: base_commit_sha)
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end
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def start_commit
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return unless start_commit_sha
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project.commit_by(oid: start_commit_sha)
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end
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def head_commit
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return unless head_commit_sha
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project.commit_by(oid: head_commit_sha)
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end
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def commit_shas
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merge_request_diff_commits.map(&:sha)
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end
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def diff_refs=(new_diff_refs)
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self.base_commit_sha = new_diff_refs&.base_sha
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self.start_commit_sha = new_diff_refs&.start_sha
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self.head_commit_sha = new_diff_refs&.head_sha
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end
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def diff_refs
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return unless start_commit_sha || base_commit_sha
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Gitlab::Diff::DiffRefs.new(
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base_sha: base_commit_sha,
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start_sha: start_commit_sha,
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head_sha: head_commit_sha
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)
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end
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# MRs created before 8.4 don't store their true diff refs (start and base),
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# but we need to get a commit SHA for the "View file @ ..." link by a file,
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# so we use an approximation of the diff refs if we can't get the actual one.
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#
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# These will not be the actual diff refs if the target branch was merged into
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# the source branch after the merge request was created, but it is good enough
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# for the specific purpose of linking to a commit.
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#
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# It is not good enough for highlighting diffs, so we can't simply pass
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# these as `diff_refs.`
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def fallback_diff_refs
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real_refs = diff_refs
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return real_refs if real_refs
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likely_base_commit_sha = (first_commit&.parent || first_commit)&.sha
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Gitlab::Diff::DiffRefs.new(
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base_sha: likely_base_commit_sha,
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start_sha: safe_start_commit_sha,
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head_sha: head_commit_sha
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)
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end
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def diff_refs_by_sha?
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base_commit_sha? && head_commit_sha? && start_commit_sha?
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end
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def diffs(diff_options = nil)
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if without_files? && comparison = diff_refs&.compare_in(project)
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# It should fetch the repository when diffs are cleaned by the system.
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# We don't keep these for storage overload purposes.
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# See https://gitlab.com/gitlab-org/gitlab-ce/issues/37639
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comparison.diffs(diff_options)
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else
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diffs_collection(diff_options)
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end
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end
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# Should always return the DB persisted diffs collection
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# (e.g. Gitlab::Diff::FileCollection::MergeRequestDiff.
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# It's useful when trying to invalidate old caches through
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# FileCollection::MergeRequestDiff#clear_cache!
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def diffs_collection(diff_options = nil)
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Gitlab::Diff::FileCollection::MergeRequestDiff.new(self, diff_options: diff_options)
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end
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def project
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merge_request.target_project
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end
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def compare
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@compare ||=
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Gitlab::Git::Compare.new(
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repository.raw_repository,
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safe_start_commit_sha,
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head_commit_sha
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)
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end
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def latest?
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self.id == merge_request.latest_merge_request_diff_id
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end
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def compare_with(sha)
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# When compare merge request versions we want diff A..B instead of A...B
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# so we handle cases when user does squash and rebase of the commits between versions.
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# For this reason we set straight to true by default.
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CompareService.new(project, head_commit_sha).execute(project, sha, straight: true)
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end
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private
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def create_merge_request_diff_files(diffs)
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rows = diffs.map.with_index do |diff, index|
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diff_hash = diff.to_hash.merge(
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binary: false,
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merge_request_diff_id: self.id,
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relative_order: index
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)
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# Compatibility with old diffs created with Psych.
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diff_hash.tap do |hash|
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diff_text = hash[:diff]
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if diff_text.encoding == Encoding::BINARY && !diff_text.ascii_only?
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hash[:binary] = true
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hash[:diff] = [diff_text].pack('m0')
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end
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end
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end
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Gitlab::Database.bulk_insert('merge_request_diff_files', rows)
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end
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def load_diffs(options)
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collection = merge_request_diff_files
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if paths = options[:paths]
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collection = collection.where('old_path IN (?) OR new_path IN (?)', paths, paths)
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end
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Gitlab::Git::DiffCollection.new(collection.map(&:to_hash), options)
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end
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def load_commits
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commits = merge_request_diff_commits.map { |commit| Commit.from_hash(commit.to_hash, project) }
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CommitCollection
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.new(merge_request.source_project, commits, merge_request.source_branch)
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end
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def save_diffs
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new_attributes = {}
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if compare.commits.size.zero?
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new_attributes[:state] = :empty
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else
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diff_collection = compare.diffs(Commit.max_diff_options)
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new_attributes[:real_size] = diff_collection.real_size
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if diff_collection.any?
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new_attributes[:state] = :collected
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create_merge_request_diff_files(diff_collection)
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end
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# Set our state to 'overflow' to make the #empty? and #collected?
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# methods (generated by StateMachine) return false.
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#
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# This attribution has to come at the end of the method so 'overflow'
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# state does not get overridden by 'collected'.
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new_attributes[:state] = :overflow if diff_collection.overflow?
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end
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assign_attributes(new_attributes)
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end
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def save_commits
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MergeRequestDiffCommit.create_bulk(self.id, compare.commits.reverse)
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# merge_request_diff_commits.reload is preferred way to reload associated
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# objects but it returns cached result for some reason in this case
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commits = merge_request_diff_commits(true)
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self.commits_count = commits.size
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end
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def repository
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project.repository
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end
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def find_base_sha
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return unless head_commit_sha && start_commit_sha
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project.merge_base_commit(head_commit_sha, start_commit_sha).try(:sha)
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end
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def keep_around_commits
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[repository, merge_request.source_project.repository].uniq.each do |repo|
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repo.keep_around(start_commit_sha)
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repo.keep_around(head_commit_sha)
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repo.keep_around(base_commit_sha)
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end
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end
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end
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