# List all installed packages
class CommandList
	super Command

	redef fun name do return "list"
	redef fun usage do return "nitpm list"
	redef fun description do return "List installed packages"

	redef fun apply(args)
	do
		var files = nitpm_lib_dir.files
		var name_to_desc = new Map[String, nullable String]
		var max_name_len = 0

		# Collect package info
		for file in files do
			var ini_path = nitpm_lib_dir / file / "package.ini"
			if verbose then print "- Reading ini file at {ini_path}"
			var ini = new IniFile.from_file(ini_path)
			var tags = ini["package.tags"]

			name_to_desc[file] = tags
			max_name_len = max_name_len.max(file.length)
		end

		# Sort in alphabetical order
		var sorted_names = name_to_desc.keys.to_a
		alpha_comparator.sort sorted_names

		# Print with clear columns
		for name in sorted_names do
			var col0 = name.justify(max_name_len+1, 0.0)
			var col1 = name_to_desc[name] or else ""
			var line = col0 + col1
			print line.trim
		end
	end
end