from pathlib import Path
import subprocess,tarfile,tempfile,shutil,os
root=Path(tempfile.mkdtemp(prefix='v3-capacity-')); app=root/'app';app.mkdir()
a=root/'source.tar';subprocess.run(['git','archive','--output',str(a),'3dc2c3feaa17af591eb6e819a055d26ab6990efb'],check=True)
with tarfile.open(a) as t:t.extractall(app)
a.unlink();(root/'bin').mkdir();(root/'tmp').mkdir();(root/'sessions').mkdir();(root/'secrets.php').write_text('<?php return [];\n')
(root/'telemetry.php').write_text('''<?php
register_shutdown_function(static function(): void {
 $line = 'Sample: '.getenv('CAPACITY_SAMPLE').' | PID: '.getmypid().' | Route: '.($_SERVER['REQUEST_URI'] ?? 'CLI').' | PHP peak bytes: '.memory_get_peak_usage(true).' | HTTP status: '.(http_response_code() ?: 200)."\\n";
 file_put_contents(getenv('CAPACITY_TELEMETRY'), $line, FILE_APPEND | LOCK_EX);
});
''')
(root/'bin/php').write_text('#!/bin/sh\nexec /usr/bin/php -d memory_limit=128M -d session.save_path='+str(root/'sessions')+' -d auto_prepend_file='+str(root/'telemetry.php')+' "$@"\n');(root/'bin/php').chmod(0o755)
(root/'router.php').write_text("<?php require __DIR__.'/telemetry.php'; return require __DIR__.'/app/public/router.php';\n")
(root/'marker.txt').write_text('Purpose: Application capacity study disposable workspace\nRevision: 3dc2c3feaa17af591eb6e819a055d26ab6990efb\n')
Path('/tmp/capacity-root').write_text(str(root));print(root)