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# frozen_string_literal: true
require_relative '../../../lib/gitlab_edition'
# Returns JS files that are related to the Rails views files that were changed in the MR.
module Tooling
class ViewToJsMappings
# The HTML attribute value pattern we're looking for to match an HTML file to a JS file.
HTML_ATTRIBUTE_VALUE_REGEXP = /js-[-\w]+/.freeze
# Search for Rails partials included in an HTML file
RAILS_PARTIAL_INVOCATION_REGEXP = %r{(?:render|render_if_exist)(?: |\()(?:partial: ?)?['"]([\w/-]+)['"]}.freeze
def initialize(view_base_folder: 'app/views', js_base_folder: 'app/assets/javascripts')
@view_base_folders = folders_for_available_editions(view_base_folder)
@js_base_folders = folders_for_available_editions(js_base_folder)
end
def execute(changed_files)
changed_view_files = view_files(changed_files)
partials = changed_view_files.flat_map do |file|
find_partials(file)
end
files_to_scan = changed_view_files + partials
js_tags = files_to_scan.flat_map do |file|
find_pattern_in_file(file, HTML_ATTRIBUTE_VALUE_REGEXP)
end
js_tags_regexp = Regexp.union(js_tags)
@js_base_folders.flat_map do |js_base_folder|
Dir["#{js_base_folder}/**/*.{js,vue}"].select do |js_file|
file_content = File.read(js_file)
js_tags_regexp.match?(file_content)
end
end
end
# Keep the files that are in the @view_base_folders folder
def view_files(changed_files)
changed_files.select do |filename|
filename.start_with?(*@view_base_folders) &&
File.exist?(filename)
end
end
def folders_for_available_editions(base_folder)
foss_prefix = base_folder
extension_prefixes = ::GitlabEdition.extensions.map { |prefix| "#{prefix}/#{foss_prefix}" }
[foss_prefix, *extension_prefixes]
end
# Note: We only search for partials with depth 1. We don't do recursive search, as
# it is probably not necessary for a first iteration.
def find_partials(file)
partial_paths = find_pattern_in_file(file, RAILS_PARTIAL_INVOCATION_REGEXP)
partial_paths.flat_map do |partial_path|
view_file_folder = File.dirname(file)
partial_relative_folder = File.dirname(partial_path)
dirname =
if partial_relative_folder == '.' # The partial is in the same folder as the HTML file
view_file_folder
else
File.join(view_file_folder, partial_relative_folder)
end
Dir["#{dirname}/_#{File.basename(partial_path)}.*"]
end
end
def find_pattern_in_file(file, pattern)
File.read(file).scan(pattern).flatten.uniq
end
end
end
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