CFStack: CLI utility for trimming down a CFML stacktrace to just the bits you want to dump into an LLM to make it fix the error.

cfstack

#!/usr/bin/env node

/*
	Run it bare and it will prompt you to paste a stack trace, 
	or feed it the stack trace from stdin and copy from stdout
		hint: pbpaste | cfstack | pbcopy
*/

'use strict';

function usage() {
	process.stderr.write(
		'Usage: cfstack\n\nPaste a CFML stacktrace, then press Enter to get to a blank line and Ctrl-D when done.\n',
	);
}

function filterStackTrace(input) {
	const lines = input
		.replace(/\r\n/g, '\n')
		.replace(/\r/g, '\n')
		.replace(/ at /g, '\n at ')
		.split('\n');

	if (lines.length > 0 && lines[lines.length - 1] === '') {
		lines.pop();
	}

	return lines
		.filter((line, index) => {
			if (index === 0) {
				return true;
			}

			return line.toLowerCase().includes('.cfc:') || line.toLowerCase().includes('.cfm:');
		})
		.map((line, index) => {
			const normalized = line.replace(/\t/g, '  ');

			if (index === 0) {
				return normalized;
			}

			const wrappedPath = normalized.match(/\(([^()]*\.(?:cfc|cfm):\d+)\)\s*$/i);
			if (wrappedPath) {
				return `at ${wrappedPath[1]}`;
			}

			const barePath = normalized.match(/^\s*at\s+([^()]*\.(?:cfc|cfm):\d+)\s*$/i);
			if (barePath) {
				return `at ${barePath[1]}`;
			}

			return normalized;
		})
		.join('\n');
}

async function main() {
	const args = process.argv.slice(2);

	if (args.includes('-h') || args.includes('--help')) {
		usage();
		return;
	}

	if (args.length > 0) {
		process.stderr.write('cfstack does not accept arguments. Paste or pipe a stacktrace into stdin.\n');
		process.exitCode = 1;
		return;
	}

	if (process.stdin.isTTY) {
		process.stderr.write('Paste CFML stacktrace, then press Enter to get to a blank line and Ctrl-D when done:\n');
	}

	process.stdin.setEncoding('utf8');

	const chunks = [];
	for await (const chunk of process.stdin) {
		chunks.push(chunk);
	}

	const output = filterStackTrace(chunks.join(''));

	if (process.stdin.isTTY) {
		process.stdout.write('\n');
	}

	process.stdout.write(output);

	if (output.length > 0 && !output.endsWith('\n')) {
		process.stdout.write('\n');
	}
}

main().catch((error) => {
	process.stderr.write(`${error?.stack || error}\n`);
	process.exitCode = 1;
});