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|
# frozen_string_literal: true
# rubocop:disable Metrics/LineLength
# rubocop:disable Style/Documentation
module Gitlab
module BackgroundMigration
# Class that migrates events for the new push event payloads setup. All
# events are copied to a shadow table, and push events will also have a row
# created in the push_event_payloads table.
class MigrateEventsToPushEventPayloads
class Event < ActiveRecord::Base
self.table_name = 'events'
serialize :data
BLANK_REF = ('0' * 40).freeze
TAG_REF_PREFIX = 'refs/tags/'.freeze
MAX_INDEX = 69
PUSHED = 5
def push_event?
action == PUSHED && data.present?
end
def commit_title
commit = commits.last
return nil unless commit && commit[:message]
index = commit[:message].index("\n")
message = index ? commit[:message][0..index] : commit[:message]
message.strip.truncate(70)
end
def commit_from_sha
if create?
nil
else
data[:before]
end
end
def commit_to_sha
if remove?
nil
else
data[:after]
end
end
def data
super || {}
end
def commits
data[:commits] || []
end
def commit_count
data[:total_commits_count] || 0
end
def ref
data[:ref]
end
def trimmed_ref_name
if ref_type == :tag
ref[10..-1]
else
ref[11..-1]
end
end
def create?
data[:before] == BLANK_REF
end
def remove?
data[:after] == BLANK_REF
end
def push_action
if create?
:created
elsif remove?
:removed
else
:pushed
end
end
def ref_type
if ref.start_with?(TAG_REF_PREFIX)
:tag
else
:branch
end
end
end
class EventForMigration < ActiveRecord::Base
self.table_name = 'events_for_migration'
end
class PushEventPayload < ActiveRecord::Base
self.table_name = 'push_event_payloads'
enum action: {
created: 0,
removed: 1,
pushed: 2
}
enum ref_type: {
branch: 0,
tag: 1
}
end
# start_id - The start ID of the range of events to process
# end_id - The end ID of the range to process.
def perform(start_id, end_id)
return unless migrate?
find_events(start_id, end_id).each { |event| process_event(event) }
end
def process_event(event)
ActiveRecord::Base.transaction do
replicate_event(event)
create_push_event_payload(event) if event.push_event?
end
rescue ActiveRecord::InvalidForeignKey => e
# A foreign key error means the associated event was removed. In this
# case we'll just skip migrating the event.
Rails.logger.error("Unable to migrate event #{event.id}: #{e}")
end
def replicate_event(event)
new_attributes = event.attributes
.with_indifferent_access.except(:title, :data)
EventForMigration.create!(new_attributes)
end
def create_push_event_payload(event)
commit_from = pack(event.commit_from_sha)
commit_to = pack(event.commit_to_sha)
PushEventPayload.create!(
event_id: event.id,
commit_count: event.commit_count,
ref_type: event.ref_type,
action: event.push_action,
commit_from: commit_from,
commit_to: commit_to,
ref: event.trimmed_ref_name,
commit_title: event.commit_title
)
end
def find_events(start_id, end_id)
Event
.where('NOT EXISTS (SELECT true FROM events_for_migration WHERE events_for_migration.id = events.id)')
.where(id: start_id..end_id)
end
def migrate?
Event.table_exists? && PushEventPayload.table_exists? &&
EventForMigration.table_exists?
end
def pack(value)
value ? [value].pack('H*') : nil
end
end
end
end
|
