# frozen_string_literal: true module UnpackStrategy class Fossil include UnpackStrategy using Magic def self.extensions [] end def self.can_extract?(path) return false unless path.magic_number.match?(/\ASQLite format 3\000/n) # Fossil database is made up of artifacts, so the `artifact` table must exist. query = "select count(*) from sqlite_master where type = 'view' and name = 'artifact'" system_command("sqlite3", args: [path, query]).stdout.to_i == 1 end private def extract_to_dir(unpack_dir, basename:, verbose:) args = if @ref_type && @ref [@ref] else [] end system_command! "fossil", args: ["open", path, *args], chdir: unpack_dir, env: { "PATH" => PATH.new(Formula["fossil"].opt_bin, ENV["PATH"]) }, verbose: verbose end end end