gitlab-org--gitlab-foss/app/models/merge_request_diff.rb

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# frozen_string_literal: true
class MergeRequestDiff < ApplicationRecord
include Sortable
include Importable
Use latest_merge_request_diff association Compared to the merge_request_diff association: 1. It's simpler to query. The query uses a foreign key to the merge_request_diffs table, so no ordering is necessary. 2. It's faster for preloading. The merge_request_diff association has to load every diff for the MRs in the set, then discard all but the most recent for each. This association means that Rails can just query for N diffs from N MRs. 3. It's more complicated to update. This is a bidirectional foreign key, so we need to update two tables when adding a diff record. This also means we need to handle this as a special case when importing a GitLab project. There is some juggling with this association in the merge request model: * `MergeRequest#latest_merge_request_diff` is _always_ the latest diff. * `MergeRequest#merge_request_diff` reuses `MergeRequest#latest_merge_request_diff` unless: * Arguments are passed. These are typically to force-reload the association. * It doesn't exist. That means we might be trying to implicitly create a diff. This only seems to happen in specs. * The association is already loaded. This is important for the reasons explained in the comment, which I'll reiterate here: if we a) load a non-latest diff, then b) get its `merge_request`, then c) get that MR's `merge_request_diff`, we should get the diff we loaded in c), even though that's not the latest diff. Basically, `MergeRequest#merge_request_diff` is the latest diff in most cases, but not quite all.
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include ManualInverseAssociation
include EachBatch
include Gitlab::Utils::StrongMemoize
include ObjectStorage::BackgroundMove
include BulkInsertableAssociations
# Don't display more than 100 commits at once
COMMITS_SAFE_SIZE = 100
BATCH_SIZE = 1000
# Applies to closed or merged MRs when determining whether to migrate their
# diffs to external storage
EXTERNAL_DIFF_CUTOFF = 7.days.freeze
# The files_count column is a 2-byte signed integer. Look up the true value
# from the database if this sentinel is seen
FILES_COUNT_SENTINEL = 2**15 - 1
# External diff cache key used by diffs export
EXTERNAL_DIFFS_CACHE_TMPDIR = 'project-%{project_id}-external-mr-%{mr_id}-diff-%{id}-cache'
EXTERNAL_DIFF_CACHE_CHUNK_SIZE = 8.megabytes
belongs_to :merge_request
Use latest_merge_request_diff association Compared to the merge_request_diff association: 1. It's simpler to query. The query uses a foreign key to the merge_request_diffs table, so no ordering is necessary. 2. It's faster for preloading. The merge_request_diff association has to load every diff for the MRs in the set, then discard all but the most recent for each. This association means that Rails can just query for N diffs from N MRs. 3. It's more complicated to update. This is a bidirectional foreign key, so we need to update two tables when adding a diff record. This also means we need to handle this as a special case when importing a GitLab project. There is some juggling with this association in the merge request model: * `MergeRequest#latest_merge_request_diff` is _always_ the latest diff. * `MergeRequest#merge_request_diff` reuses `MergeRequest#latest_merge_request_diff` unless: * Arguments are passed. These are typically to force-reload the association. * It doesn't exist. That means we might be trying to implicitly create a diff. This only seems to happen in specs. * The association is already loaded. This is important for the reasons explained in the comment, which I'll reiterate here: if we a) load a non-latest diff, then b) get its `merge_request`, then c) get that MR's `merge_request_diff`, we should get the diff we loaded in c), even though that's not the latest diff. Basically, `MergeRequest#merge_request_diff` is the latest diff in most cases, but not quite all.
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manual_inverse_association :merge_request, :merge_request_diff
has_many :merge_request_diff_files,
-> { order(:merge_request_diff_id, :relative_order) },
inverse_of: :merge_request_diff
has_many :merge_request_diff_commits, -> { order(:merge_request_diff_id, :relative_order) }
validates :base_commit_sha, :head_commit_sha, :start_commit_sha, sha: true
validates :merge_request_id, uniqueness: { scope: :diff_type }, if: :merge_head?
state_machine :state, initial: :empty do
event :clean do
transition any => :without_files
end
state :collected
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state :overflow
# Diff files have been deleted by the system
state :without_files
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# Deprecated states: these are no longer used but these values may still occur
# in the database.
state :timeout
state :overflow_commits_safe_size
state :overflow_diff_files_limit
state :overflow_diff_lines_limit
end
enum diff_type: {
regular: 1,
merge_head: 2
}
scope :with_files, -> { without_states(:without_files, :empty) }
scope :viewable, -> { without_state(:empty) }
scope :by_commit_sha, ->(sha) do
joins(:merge_request_diff_commits).where(merge_request_diff_commits: { sha: sha }).reorder(nil)
end
scope :by_project_id, -> (project_id) do
joins(:merge_request).where(merge_requests: { target_project_id: project_id })
end
scope :recent, -> (limit = 100) { order(id: :desc).limit(limit) }
scope :files_in_database, -> do
where(stored_externally: [false, nil]).where(arel_table[:files_count].gt(0))
end
scope :not_latest_diffs, -> do
merge_requests = MergeRequest.arel_table
mr_diffs = arel_table
join_condition = merge_requests[:id].eq(mr_diffs[:merge_request_id])
.and(mr_diffs[:id].not_eq(merge_requests[:latest_merge_request_diff_id]))
.and(mr_diffs[:diff_type].eq(diff_types[:regular]))
arel_join = mr_diffs.join(merge_requests).on(join_condition)
joins(arel_join.join_sources)
end
scope :old_merged_diffs, -> (before) do
merge_requests = MergeRequest.arel_table
mr_metrics = MergeRequest::Metrics.arel_table
mr_diffs = arel_table
mr_join = mr_diffs
.join(merge_requests)
.on(mr_diffs[:merge_request_id].eq(merge_requests[:id]))
metrics_join_condition = mr_diffs[:merge_request_id]
.eq(mr_metrics[:merge_request_id])
.and(mr_metrics[:merged_at].not_eq(nil))
metrics_join = mr_diffs.join(mr_metrics).on(metrics_join_condition)
condition = MergeRequest.arel_table[:state_id].eq(MergeRequest.available_states[:merged])
.and(MergeRequest::Metrics.arel_table[:merged_at].lteq(before))
.and(MergeRequest::Metrics.arel_table[:merged_at].not_eq(nil))
joins(metrics_join.join_sources, mr_join.join_sources).where(condition)
end
scope :old_closed_diffs, -> (before) do
condition = MergeRequest.arel_table[:state_id].eq(MergeRequest.available_states[:closed])
.and(MergeRequest::Metrics.arel_table[:latest_closed_at].lteq(before))
joins(merge_request: :metrics).where(condition)
end
# This scope uses LATERAL JOIN to find the most recent MR diff association for the given merge requests.
# To avoid joining the merge_requests table, we build an in memory table using the merge request ids.
# Example:
# SELECT ...
# FROM (VALUES (MR_ID_1),(MR_ID_2)) merge_requests (id)
# INNER JOIN LATERAL (...)
scope :latest_diff_for_merge_requests, -> (merge_requests) do
mrs = Array(merge_requests)
return MergeRequestDiff.none if mrs.empty?
merge_request_table = MergeRequest.arel_table
merge_request_diff_table = MergeRequestDiff.arel_table
join_query = MergeRequestDiff
.where(merge_request_table[:id].eq(merge_request_diff_table[:merge_request_id]))
.order(created_at: :desc)
.limit(1)
mr_id_list = mrs.map { |mr| "(#{Integer(mr.id)})" }.join(",")
MergeRequestDiff
.from("(VALUES #{mr_id_list}) merge_requests (id)")
.joins("INNER JOIN LATERAL (#{join_query.to_sql}) #{MergeRequestDiff.table_name} ON TRUE")
.includes(:merge_request_diff_commits)
end
class << self
def ids_for_external_storage_migration(limit:)
return [] unless Gitlab.config.external_diffs.enabled
case Gitlab.config.external_diffs.when
when 'always'
ids_for_external_storage_migration_strategy_always(limit: limit)
when 'outdated'
ids_for_external_storage_migration_strategy_outdated(limit: limit)
else
[]
end
end
def ids_for_external_storage_migration_strategy_always(limit:)
files_in_database.limit(limit).pluck(:id)
end
def ids_for_external_storage_migration_strategy_outdated(limit:)
# Outdated is too complex to be a single SQL query, so split into three
before = EXTERNAL_DIFF_CUTOFF.ago
ids = files_in_database
.old_merged_diffs(before)
.limit(limit)
.pluck(:id)
return ids if ids.size >= limit
ids += files_in_database
.old_closed_diffs(before)
.limit(limit - ids.size)
.pluck(:id)
return ids if ids.size >= limit
ids + files_in_database
.not_latest_diffs
.limit(limit - ids.size)
.pluck(:id)
end
end
mount_uploader :external_diff, ExternalDiffUploader
# All diff information is collected from repository after object is created.
# It allows you to override variables like head_commit_sha before getting diff.
after_create :save_git_content, unless: :importing?
after_create_commit :set_as_latest_diff, unless: :importing?
after_save :update_external_diff_store
after_save :set_count_columns
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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
def viewable?
collected? || without_files? || overflow?
end
# Collect information about commits and diff from repository
# and save it to the database as serialized data
def save_git_content
ensure_commit_shas
save_commits
save_diffs
# Another set of `after_save` hooks will be called here when we update the record
save
# We need to reset so that dirty tracking is reset when running the original set
# of `after_save` hooks that come after this `after_create` hook. Otherwise, the
# hooks that run when an attribute was changed are run twice.
reset
keep_around_commits unless importing?
end
def set_as_latest_diff
# Don't set merge_head diff as latest so it won't get considered as the
# MergeRequest#merge_request_diff.
return if merge_head?
MergeRequest
.where('id = ? AND COALESCE(latest_merge_request_diff_id, 0) < ?', self.merge_request_id, self.id)
.update_all(latest_merge_request_diff_id: self.id)
end
def ensure_commit_shas
self.start_commit_sha ||= merge_request.target_branch_sha
if merge_head? && merge_request.merge_ref_head.present?
diff_refs = merge_request.merge_ref_head.diff_refs
self.head_commit_sha ||= diff_refs.head_sha
self.base_commit_sha ||= diff_refs.base_sha
else
self.head_commit_sha ||= merge_request.source_branch_sha
self.base_commit_sha ||= find_base_sha
end
end
# Override head_commit_sha to keep compatibility with merge request diff
# created before version 8.4 that does not store head_commit_sha in separate db field.
def head_commit_sha
if persisted? && super.nil?
last_commit_sha
else
super
end
end
def files_count
db_value = read_attribute(:files_count)
case db_value
when nil, FILES_COUNT_SENTINEL
merge_request_diff_files.count
else
db_value
end
end
# This method will rely on repository branch sha
# in case start_commit_sha is nil. Its necesarry for old merge request diff
# created before version 8.4 to work
def safe_start_commit_sha
start_commit_sha || merge_request.target_branch_sha
end
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def size
real_size.presence || raw_diffs.size
end
def lines_count
strong_memoize(:lines_count) do
raw_diffs(limits: false).line_count
end
end
def raw_diffs(options = {})
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if options[:ignore_whitespace_change]
@diffs_no_whitespace ||= compare.diffs(options)
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else
@raw_diffs ||= {}
@raw_diffs[options] ||= load_diffs(options)
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end
end
def commits(limit: nil, load_from_gitaly: false)
strong_memoize(:"commits_#{limit || 'all'}_#{load_from_gitaly}") do
load_commits(limit: limit, load_from_gitaly: load_from_gitaly)
end
end
def last_commit_sha
commit_shas(limit: 1).first
end
def first_commit
commits.last
end
def last_commit
commits.first
end
def base_commit
return unless base_commit_sha
project.commit_by(oid: base_commit_sha)
end
def start_commit
return unless start_commit_sha
project.commit_by(oid: start_commit_sha)
end
def head_commit
return unless head_commit_sha
project.commit_by(oid: head_commit_sha)
end
def commit_shas(limit: nil)
if association(:merge_request_diff_commits).loaded?
sorted_diff_commits = merge_request_diff_commits.sort_by { |diff_commit| [diff_commit.id, diff_commit.relative_order] }
sorted_diff_commits = sorted_diff_commits.take(limit) if limit
sorted_diff_commits.map(&:sha)
else
merge_request_diff_commits.limit(limit).pluck(:sha)
end
end
def includes_any_commits?(shas)
return false if shas.blank?
# when the number of shas is huge (1000+) we don't want
# to pass them all as an SQL param, let's pass them in batches
shas.each_slice(BATCH_SIZE).any? do |batched_shas|
merge_request_diff_commits.where(sha: batched_shas).exists?
end
end
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def diff_refs=(new_diff_refs)
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self.base_commit_sha = new_diff_refs&.base_sha
self.start_commit_sha = new_diff_refs&.start_sha
self.head_commit_sha = new_diff_refs&.head_sha
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end
def diff_refs
return unless start_commit_sha || base_commit_sha
Gitlab::Diff::DiffRefs.new(
base_sha: base_commit_sha,
start_sha: start_commit_sha,
head_sha: head_commit_sha
)
end
# MRs created before 8.4 don't store their true diff refs (start and base),
# 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.
#
# These will not be the actual diff refs if the target branch was merged into
# the source branch after the merge request was created, but it is good enough
# for the specific purpose of linking to a commit.
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#
# It is not good enough for highlighting diffs, so we can't simply pass
# these as `diff_refs.`
def fallback_diff_refs
real_refs = diff_refs
return real_refs if real_refs
likely_base_commit_sha = (first_commit&.parent || first_commit)&.sha
Gitlab::Diff::DiffRefs.new(
base_sha: likely_base_commit_sha,
start_sha: safe_start_commit_sha,
head_sha: head_commit_sha
)
end
def diff_refs_by_sha?
base_commit_sha? && head_commit_sha? && start_commit_sha?
end
def diffs_in_batch(batch_page, batch_size, diff_options:)
fetching_repository_diffs(diff_options) do |comparison|
reorder_diff_files!
diffs_batch = diffs_in_batch_collection(batch_page, batch_size, diff_options: diff_options)
if comparison
if diff_options[:paths].blank? && !without_files?
# Return the empty MergeRequestDiffBatch for an out of bound batch request
break diffs_batch if diffs_batch.diff_paths.blank?
diff_options.merge!(
paths: diffs_batch.diff_paths,
pagination_data: diffs_batch.pagination_data
)
end
comparison.diffs(diff_options)
else
diffs_batch
end
end
end
def diffs(diff_options = nil)
fetching_repository_diffs(diff_options) do |comparison|
# It should fetch the repository when diffs are cleaned by the system.
# We don't keep these for storage overload purposes.
# See https://gitlab.com/gitlab-org/gitlab-foss/issues/37639
if comparison
comparison.diffs(diff_options)
else
reorder_diff_files!
diffs_collection(diff_options)
end
end
end
# Should always return the DB persisted diffs collection
# (e.g. Gitlab::Diff::FileCollection::MergeRequestDiff.
# It's useful when trying to invalidate old caches through
# FileCollection::MergeRequestDiff#clear_cache!
def diffs_collection(diff_options = nil)
Gitlab::Diff::FileCollection::MergeRequestDiff.new(self, diff_options: diff_options)
end
def project
merge_request.target_project
end
def compare
@compare ||=
Gitlab::Git::Compare.new(
repository.raw_repository,
safe_start_commit_sha,
head_commit_sha
)
end
def latest?
Use latest_merge_request_diff association Compared to the merge_request_diff association: 1. It's simpler to query. The query uses a foreign key to the merge_request_diffs table, so no ordering is necessary. 2. It's faster for preloading. The merge_request_diff association has to load every diff for the MRs in the set, then discard all but the most recent for each. This association means that Rails can just query for N diffs from N MRs. 3. It's more complicated to update. This is a bidirectional foreign key, so we need to update two tables when adding a diff record. This also means we need to handle this as a special case when importing a GitLab project. There is some juggling with this association in the merge request model: * `MergeRequest#latest_merge_request_diff` is _always_ the latest diff. * `MergeRequest#merge_request_diff` reuses `MergeRequest#latest_merge_request_diff` unless: * Arguments are passed. These are typically to force-reload the association. * It doesn't exist. That means we might be trying to implicitly create a diff. This only seems to happen in specs. * The association is already loaded. This is important for the reasons explained in the comment, which I'll reiterate here: if we a) load a non-latest diff, then b) get its `merge_request`, then c) get that MR's `merge_request_diff`, we should get the diff we loaded in c), even though that's not the latest diff. Basically, `MergeRequest#merge_request_diff` is the latest diff in most cases, but not quite all.
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self.id == merge_request.latest_merge_request_diff_id
end
# rubocop: disable CodeReuse/ServiceClass
def compare_with(sha)
# When compare merge request versions we want diff A..B instead of A...B
# so we handle cases when user does squash and rebase of the commits between versions.
# For this reason we set straight to true by default.
CompareService.new(project, head_commit_sha).execute(project, sha, straight: true)
end
# rubocop: enable CodeReuse/ServiceClass
def modified_paths(fallback_on_overflow: false)
if fallback_on_overflow && overflow?
# This is an extremely slow means to find the modified paths for a given
# MergeRequestDiff. This should be avoided, except where the limit of
# 1_000 (as of %12.10) entries returned by the default behavior is an
# issue.
strong_memoize(:overflowed_modified_paths) do
project.repository.diff_stats(
base_commit_sha,
head_commit_sha
).paths
end
else
strong_memoize(:modified_paths) do
merge_request_diff_files.pluck(:new_path, :old_path).flatten.uniq
end
end
end
def update_external_diff_store
return unless saved_change_to_external_diff? || saved_change_to_stored_externally?
update_column(:external_diff_store, external_diff.object_store)
end
# If enabled, yields the external file containing the diff. Otherwise, yields
# nil. This method is not thread-safe, but it *is* re-entrant, which allows
# multiple merge_request_diff_files to load their data efficiently
def opening_external_diff
return yield(nil) unless stored_externally?
return yield(@external_diff_file) if @external_diff_file
external_diff.open do |file|
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@external_diff_file = file
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yield(@external_diff_file)
ensure
@external_diff_file = nil
end
end
# Transactionally migrate the current merge_request_diff_files entries to
# external storage. If external storage isn't an option for this diff, the
# method is a no-op.
def migrate_files_to_external_storage!
return if stored_externally? || !use_external_diff? || files_count == 0
rows = build_merge_request_diff_files(merge_request_diff_files)
rows = build_external_merge_request_diff_files(rows)
# Perform carrierwave activity before entering the database transaction.
# This is safe as until the `external_diff_store` column is changed, we will
# continue to consult the in-database content.
self.external_diff.store!
transaction do
MergeRequestDiffFile.where(merge_request_diff_id: id).delete_all
ApplicationRecord.legacy_bulk_insert('merge_request_diff_files', rows) # rubocop:disable Gitlab/BulkInsert
save!
end
merge_request_diff_files.reset
end
# Transactionally migrate the current merge_request_diff_files entries from
# external storage, back to the database. This is the rollback operation for
# +migrate_files_to_external_storage!+
#
# If this diff isn't in external storage, the method is a no-op.
def migrate_files_to_database!
return unless stored_externally?
return if files_count == 0
rows = convert_external_diffs_to_database
transaction do
MergeRequestDiffFile.where(merge_request_diff_id: id).delete_all
ApplicationRecord.legacy_bulk_insert('merge_request_diff_files', rows) # rubocop:disable Gitlab/BulkInsert
update!(stored_externally: false)
end
# Only delete the external diff file after the contents have been saved to
# the database
remove_external_diff!
merge_request_diff_files.reset
end
# Yields locally cached external diff if it's externally stored.
# Used during Project Export to speed up externally
# stored merge request diffs export
def cached_external_diff
return yield(nil) unless stored_externally?
cache_external_diff unless File.exist?(external_diff_cache_filepath)
File.open(external_diff_cache_filepath) do |file|
yield(file)
end
end
def remove_cached_external_diff
Gitlab::Utils.check_path_traversal!(external_diff_cache_dir)
Gitlab::Utils.check_allowed_absolute_path!(external_diff_cache_dir, [Dir.tmpdir])
return unless Dir.exist?(external_diff_cache_dir)
FileUtils.rm_rf(external_diff_cache_dir)
end
private
def convert_external_diffs_to_database
opening_external_diff do |external_file|
merge_request_diff_files.map do |diff_file|
row = diff_file.attributes.except('diff')
raise "Diff file lacks external diff offset or size: #{row.inspect}" unless
row['external_diff_offset'] && row['external_diff_size']
# The diff in the external file is already base64-encoded if necessary,
# matching the 'binary' attribute of the row. Reading it directly allows
# a cycle of decode-encode to be skipped
external_file.seek(row.delete('external_diff_offset'))
row['diff'] = external_file.read(row.delete('external_diff_size'))
row
end
end
end
def diffs_in_batch_collection(batch_page, batch_size, diff_options:)
Gitlab::Diff::FileCollection::MergeRequestDiffBatch.new(self,
batch_page,
batch_size,
diff_options: diff_options)
end
def encode_in_base64?(diff_text)
return false if diff_text.nil?
(diff_text.encoding == Encoding::BINARY && !diff_text.ascii_only?) ||
diff_text.include?("\0")
end
def build_external_merge_request_diff_files(rows)
tempfile = build_external_diff_tempfile(rows)
self.external_diff = tempfile
self.stored_externally = true
rows
ensure
tempfile&.unlink
end
def create_merge_request_diff_files(rows)
rows = build_external_merge_request_diff_files(rows) if use_external_diff?
# Faster inserts
ApplicationRecord.legacy_bulk_insert('merge_request_diff_files', rows) # rubocop:disable Gitlab/BulkInsert
end
def build_external_diff_tempfile(rows)
Tempfile.open(external_diff.filename) do |file|
rows.each do |row|
data = row.delete(:diff)
row[:external_diff_offset] = file.pos
row[:external_diff_size] = data&.bytesize || 0
file.write(data)
end
file
end
end
def build_merge_request_diff_files(diffs)
sort_diffs(diffs).map.with_index do |diff, index|
diff_hash = diff.to_hash.merge(
binary: false,
merge_request_diff_id: self.id,
relative_order: index
)
# Compatibility with old diffs created with Psych.
diff_hash.tap do |hash|
diff_text = hash[:diff]
if encode_in_base64?(diff_text)
hash[:binary] = true
hash[:diff] = [diff_text].pack('m0')
end
end
end
end
# Yields the block with the repository Compare object if it should
# fetch diffs from the repository instead DB.
def fetching_repository_diffs(diff_options)
return unless block_given?
diff_options ||= {}
# Can be read as: fetch the persisted diffs if yielded without the
# Compare object.
return yield unless without_files? || diff_options[:ignore_whitespace_change]
return yield unless diff_refs&.complete?
comparison = diff_refs.compare_in(repository.project)
return yield unless comparison
yield(comparison)
end
def use_external_diff?
return false unless Gitlab.config.external_diffs.enabled
case Gitlab.config.external_diffs.when
when 'always'
true
when 'outdated'
outdated_by_merge? || outdated_by_closure? || old_version?
else
false # Disable external diffs if misconfigured
end
end
def outdated_by_merge?
return false unless merge_request&.metrics&.merged_at
merge_request.merged? && merge_request.metrics.merged_at < EXTERNAL_DIFF_CUTOFF.ago
end
def outdated_by_closure?
return false unless merge_request&.metrics&.latest_closed_at
merge_request.closed? && merge_request.metrics.latest_closed_at < EXTERNAL_DIFF_CUTOFF.ago
end
def old_version?
latest_id = MergeRequest
.where(id: merge_request_id)
.limit(1)
.pluck(:latest_merge_request_diff_id)
.first
latest_id && self.id < latest_id
end
def load_diffs(options)
# Ensure all diff files operate on the same external diff file instance if
# present. This reduces file open/close overhead.
opening_external_diff do
collection = merge_request_diff_files
if paths = options[:paths]
collection = collection.where('old_path IN (?) OR new_path IN (?)', paths, paths)
end
Gitlab::Git::DiffCollection.new(collection.map(&:to_hash), options)
end
end
def load_commits(limit: nil, load_from_gitaly: false)
if load_from_gitaly
commits = Gitlab::Git::Commit.batch_by_oid(repository, merge_request_diff_commits.limit(limit).map(&:sha))
commits = Commit.decorate(commits, project)
else
commits = merge_request_diff_commits.with_users.limit(limit)
.map { |commit| Commit.from_hash(commit.to_hash, project) }
end
CommitCollection
.new(merge_request.target_project, commits, merge_request.target_branch)
end
def save_diffs
new_attributes = {}
if compare.commits.empty?
new_attributes[:state] = :empty
else
diff_collection = compare.diffs(Commit.max_diff_options)
new_attributes[:real_size] = diff_collection.real_size
2016-03-03 12:38:44 -05:00
if diff_collection.any?
new_attributes[:state] = :collected
rows = build_merge_request_diff_files(diff_collection)
create_merge_request_diff_files(rows)
new_attributes[:sorted] = true
self.class.uncached { merge_request_diff_files.reset }
end
# Set our state to 'overflow' to make the #empty? and #collected?
# methods (generated by StateMachine) return false.
#
# This attribution has to come at the end of the method so 'overflow'
# state does not get overridden by 'collected'.
new_attributes[:state] = :overflow if diff_collection.overflow?
end
assign_attributes(new_attributes)
end
def save_commits
MergeRequestDiffCommit.create_bulk(self.id, compare.commits.reverse)
self.class.uncached { merge_request_diff_commits.reset }
end
def set_count_columns
update_columns(
commits_count: merge_request_diff_commits.size,
files_count: [FILES_COUNT_SENTINEL, merge_request_diff_files.size].min
)
end
def repository
project.repository
end
def find_base_sha
return unless head_commit_sha && start_commit_sha
project.merge_base_commit(head_commit_sha, start_commit_sha).try(:sha)
end
def keep_around_commits
[repository, merge_request.source_project.repository].uniq.each do |repo|
repo.keep_around(start_commit_sha, head_commit_sha, base_commit_sha)
end
end
def reorder_diff_files!
return if sorted? || merge_request_diff_files.empty?
diff_files = sort_diffs(merge_request_diff_files)
diff_files.each_with_index do |diff_file, index|
diff_file.relative_order = index
end
transaction do
# The `merge_request_diff_files` table doesn't have an `id` column so
# we cannot use `Gitlab::Database::BulkUpdate`.
MergeRequestDiffFile.where(merge_request_diff_id: id).delete_all
MergeRequestDiffFile.bulk_insert!(diff_files)
update_column(:sorted, true)
end
end
def sort_diffs(diffs)
Gitlab::Diff::FileCollectionSorter.new(diffs).sort
end
# Downloads external diff to a temp storage location.
def cache_external_diff
return unless stored_externally?
return if File.exist?(external_diff_cache_filepath)
Dir.mkdir(external_diff_cache_dir) unless Dir.exist?(external_diff_cache_dir)
opening_external_diff do |external_diff|
File.open(external_diff_cache_filepath, 'wb') do |file|
file.write(external_diff.read(EXTERNAL_DIFF_CACHE_CHUNK_SIZE)) until external_diff.eof?
end
end
end
def external_diff_cache_filepath
File.join(external_diff_cache_dir, "diff-#{id}")
end
def external_diff_cache_dir
File.join(
Dir.tmpdir,
EXTERNAL_DIFFS_CACHE_TMPDIR % { project_id: project.id, mr_id: merge_request_id, id: id }
)
end
end
MergeRequestDiff.prepend_mod_with('MergeRequestDiff')