Create seperate argv parser

includes/argvParser.php

@@ -0,0 +1,50 @@
+<?php
+
+readonly class argvParser
+{
+    /**
+     * @param array<string, string> $options
+     * @param array<string, string> $arguments
+     */
+    public function __construct(
+        private array $options = [],
+        private array $arguments = [],
+    ) {}
+
+    public function getOptionsHelp(): string
+    {
+        $line = '';
+        foreach ($this->options as $option => $description) {
+            $line .= sprintf('[-%s (%s)] ', $option, $description);
+        }
+        foreach ($this->arguments as $argument => $description) {
+            $line .= sprintf('<%s (%s)> ', $argument, $description);
+        }
+        return $line;
+    }
+
+    public function parseArgv(array $argv): false|array
+    {
+        array_shift($argv); // shift the script name
+        if (count($argv) === 0) {
+            return false;
+        }
+
+        $parsed = array_map(fn() => false, $this->options);
+        while (str_starts_with($argv[0], '-')) {
+            $option = substr($argv[0], 1);
+            if ($this->options[$option]) {
+                $parsed[$option] = true;
+            }
+            array_shift($argv);
+        }
+        if (count($argv) !== count($this->arguments)) {
+            return false;
+        }
+        foreach ($this->arguments as $arg => $description) {
+            $parsed[$arg] = array_shift($argv);
+        }
+
+        return $parsed;
+    }
+}

packer.php

@@ -5,29 +5,43 @@ include 'includes/fileReader.php';
 include 'includes/io.php';
 include 'includes/includeBuilder.php';
 include 'includes/includeParser.php';
+include 'includes/argvParser.php';
 
-if (count($argv) < 3) {
-    line('Usage: ' . __FILE__ . ' <inFile> <outFile>');
+// php://stdout
+$argvParser = new ArgvParser(
+    ['d' => 'Delete outFile'],
+    ['inFile' => 'Input file', 'outFile' => 'Output file']
+);
+$parsed = $argvParser->parseArgv($argv);
+
+if ($parsed === false) {
+    line('Usage: ' . __FILE__ . ' ' . $argvParser->getOptionsHelp());
     exit(1);
 }
-$fromFile = $argv[1];
-if (!file_exists($fromFile)) {
-    line('File not found: ' . $fromFile);
+$inFile = $parsed['inFile'];
+if (!file_exists($inFile)) {
+    line('File not found: ' . $inFile);
     exit(1);
 }
-$toFile = $argv[2];
-if (file_exists($toFile)) {
-    line('File already exists: ' . $toFile);
-    unlink($toFile);
+$outFile = $parsed['outFile'];
+if (file_exists($outFile)) {
+    line('File already exists: ' . $outFile);
+    if ($parsed['d']) {
+        line('Deleting...');
+        unlink($outFile);
+    } else {
+        exit(1);
+    }
 }
 
 $includes = [];
-buildIncludes($fromFile, $includes);
-$lines = yieldIncludes($fromFile, $includes);
+buildIncludes($inFile, $includes);
+var_dump($includes);
+$lines = yieldIncludes($inFile, $includes);
 
-$toFileHandle = fopen($toFile, 'w');
+$toFileHandle = fopen($outFile, 'w');
 foreach ($lines as $line) {
     fwrite($toFileHandle, $line);
-    chmod($toFile, fileperms($fromFile));
 }
+chmod($outFile, fileperms($inFile));
 fclose($toFileHandle);