mu: allow color in early command errors

mu/mu-options.cc

@@ -1,5 +1,5 @@
 /*
-** Copyright (C) 2022 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+** Copyright (C) 2022-2023 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
 **
 ** This program is free software; you can redistribute it and/or modify it
 ** under the terms of the GNU General Public License as published by the
@@ -594,24 +594,29 @@ cmd_help(const CLI::App& app, Options& opts)
 		   "no help available for '%s'", opts.help.command.c_str());
 }
 
+bool
+Options::default_no_color()
+{
+	static const auto no_color =
+		!::isatty(::fileno(stdout)) ||
+		!::isatty(::fileno(stderr)) ||
+		::getenv("NO_COLOR") != NULL;
+
+	return no_color;
+}
 
 static void
 add_global_options(CLI::App& cli, Options& opts)
 {
-	static const auto default_no_color =
+	opts.nocolor = Options::default_no_color();
-		!::isatty(::fileno(stdout)) ||
-		!::isatty(::fileno(stderr)) ||
-		::getenv("NO_COLOR") != NULL;
-	opts.nocolor = default_no_color;
-
 	errno = 0;
 
 	cli.add_flag("-q,--quiet", opts.quiet, "Hide non-essential output");
 	cli.add_flag("-v,--verbose", opts.verbose, "Show verbose output");
 	cli.add_flag("--log-stderr", opts.log_stderr, "Log to stderr");
 	cli.add_flag("--nocolor", opts.nocolor, "Don't show ANSI colors")
-		->default_val(default_no_color)
+		->default_val(Options::default_no_color())
-		->default_str(default_no_color ? "<true>" : "<false>");
+		->default_str(Options::default_no_color() ? "<true>" : "<false>");
 	cli.add_flag("-d,--debug", opts.debug, "Run in debug mode")
 		->group(""/*always hide*/);
 }

mu/mu-options.hh

@@ -54,6 +54,13 @@ struct Options {
 	bool		verbose;			/**<  verbose output */
 	std::string	muhome;				/**<  alternative mu dir */
 
+	/**
+	 * Whether by default, we should show color
+	 *
+	 * @return true or false
+	 */
+	static bool default_no_color();
+
 	enum struct SubCommand {
 		Add, Cfind, Extract, Fields, Find, Help, Index,Info, Init, Mkdir,
 		Remove, Script, Server, Verify, View/*must be last*/
@@ -274,7 +281,6 @@ struct Options {
 
 };
 
-
 } // namepace Mu
 
 #endif /* MU_OPTIONS_HH__ */

mu/mu.cc

@@ -1,5 +1,5 @@
 /*
-** Copyright (C) 2008-2022 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+** Copyright (C) 2008-2023 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
 **
 ** This program is free software; you can redistribute it and/or modify it
 ** under the terms of the GNU General Public License as published by the
@@ -33,6 +33,19 @@
 
 using namespace Mu;
 
+
+static void
+output_error(const std::string& what, bool use_color)
+{
+	using Color = MaybeAnsi::Color;
+	MaybeAnsi col{use_color};
+
+	std::cerr << col.fg(Color::Red) << "error" << col.reset() << ": "
+		  << col.fg(Color::BrightYellow)
+		  << what << "\n";
+
+}
+
 static int
 handle_result(const Result<void>& res, const Mu::Options& opts)
 {
@@ -43,11 +56,9 @@ handle_result(const Result<void>& res, const Mu::Options& opts)
 	MaybeAnsi col{!opts.nocolor};
 
 	// show the error and some help, but not if it's only a softerror.
-	if (!res.error().is_soft_error()) {
+	if (!res.error().is_soft_error())
-		std::cerr << col.fg(Color::Red) << "error" << col.reset() << ": "
+		output_error(res.error().what(), !opts.nocolor);
-			  << col.fg(Color::BrightYellow)
+	else
-			  << res.error().what() << "\n";
-	} else
 		std::cerr <<  col.fg(Color::BrightBlue) << res.error().what() << '\n';
 
 	std::cerr << col.fg(Color::Green);
@@ -82,13 +93,18 @@ main(int argc, char* argv[])
 	 */
 	const auto opts{Options::make(argc, argv)};
 	if (!opts) {
-		std::cerr << "error: " << opts.error().what() << "\n";
+		output_error(opts.error().what(), !Options::default_no_color());
 		return opts.error().exit_code();
 	} else if (!opts->sub_command) {
 		// nothing more to do.
 		return 0;
 	}
 
+	/*
+	 * there's a subcommand
+	 */
+
+
 	/*
 	 * set up logging
 	 */
@@ -101,7 +117,7 @@ main(int argc, char* argv[])
 	const auto logger = Logger::make(opts->runtime_path(RuntimePath::LogFile),
 					 lopts);
 	if (!logger) {
-		std::cerr << "error:" << logger.error().what() << "\n";
+		output_error(logger.error().what(), !opts->nocolor);
 		return logger.error().exit_code();
 	}