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Funkin/source/funkin/util/CLIUtil.hx
2023-11-22 19:17:35 -05:00

148 lines
3.1 KiB
Haxe

package funkin.util;
import haxe.io.Path;
/**
* Utilties for interpreting command line arguments.
*/
@:nullSafety
class CLIUtil
{
/**
* If we don't do this, dragging and dropping a file onto the executable
* causes it to be unable to find the assets folder.
*/
public static function resetWorkingDir():Void
{
#if sys
var exeDir:String = Path.addTrailingSlash(Path.directory(Sys.programPath()));
#if mac
exeDir = Path.addTrailingSlash(Path.join([exeDir, '../Resources/']));
#end
var cwd:String = Path.addTrailingSlash(Sys.getCwd());
if (cwd == exeDir)
{
trace('Working directory is already correct.');
}
else
{
trace('Changing working directory from ${Sys.getCwd()} to ${exeDir}');
Sys.setCwd(exeDir);
}
#end
}
public static function processArgs():CLIParams
{
#if sys
return interpretArgs(cleanArgs(Sys.args()));
#else
return buildDefaultParams();
#end
}
static function interpretArgs(args:Array<String>):CLIParams
{
var result = buildDefaultParams();
result.args = [for (arg in args) arg]; // Copy the array.
while (args.length > 0)
{
var arg:Null<String> = args.shift();
if (arg == null) continue;
if (arg.startsWith('-'))
{
switch (arg)
{
// Flags
case '-h' | '--help':
printUsage();
case '-v' | '--version':
trace(Constants.GENERATED_BY);
case '--chart':
if (args.length == 0)
{
trace('No chart path provided.');
printUsage();
}
else
{
result.chart.shouldLoadChart = true;
result.chart.chartPath = args.shift();
}
}
}
else
{
// Make an attempt to interpret the argument.
if (arg.endsWith(Constants.EXT_CHART))
{
result.chart.shouldLoadChart = true;
result.chart.chartPath = arg;
}
else
{
trace('Unrecognized argument: ${arg}');
printUsage();
}
}
}
return result;
}
static function printUsage():Void
{
trace('Usage: Funkin.exe [--chart <chart>] [--help] [--version]');
}
static function buildDefaultParams():CLIParams
{
return {
args: [],
chart:
{
shouldLoadChart: false,
chartPath: null
}
};
}
/**
* Clean up the arguments passed to the application before parsing them.
* @param args The arguments to clean up.
* @return The cleaned up arguments.
*/
static function cleanArgs(args:Array<String>):Array<String>
{
var result:Array<String> = [];
if (args == null || args.length == 0) return result;
return args.map(function(arg:String):String {
if (arg == null) return '';
return arg.trim();
}).filter(function(arg:String):Bool {
return arg != null && arg != '';
});
}
}
typedef CLIParams =
{
var args:Array<String>;
var chart:CLIChartParams;
}
typedef CLIChartParams =
{
var shouldLoadChart:Bool;
var chartPath:Null<String>;
};