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# frozen_string_literal: true
require 'find'
class RequireMigration
class AutoLoadError < RuntimeError
MESSAGE = "Can not find any migration file for `%{file_name}`!\n" \
"You can try to provide the migration file name manually."
def initialize(file_name)
message = format(MESSAGE, file_name: file_name)
super(message)
end
end
MIGRATION_FOLDERS = %w[db/migrate db/post_migrate].freeze
SPEC_FILE_PATTERN = %r{.+/(?<file_name>.+)_spec\.rb}.freeze
class << self
def require_migration!(file_name)
file_paths = search_migration_file(file_name)
raise AutoLoadError, file_name unless file_paths.first
require file_paths.first
end
def search_migration_file(file_name)
migration_folders.flat_map do |path|
migration_path = Rails.root.join(path).to_s
Find.find(migration_path).select { |m| File.basename(m).match? /\A\d+_#{file_name}\.rb\z/ }
end
end
private
def migration_folders
MIGRATION_FOLDERS
end
end
end
RequireMigration.prepend_mod_with('RequireMigration')
def require_migration!(file_name = nil)
location_info = caller_locations.first.path.match(RequireMigration::SPEC_FILE_PATTERN)
file_name ||= location_info[:file_name]
RequireMigration.require_migration!(file_name)
end
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