From cb5de6948f750a6803da965be8f39580a55d36a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mikael=20L=C3=B6vqvist?= <mikael.lovqvist.mail@gmail.com>
Date: Sun, 22 Feb 2026 03:46:33 +0100
Subject: [PATCH] Initial commit

---
 ansi-tunc.mjs         | 119 ++++++++++++++++++++++++++++++++++++++++++
 grep-mtime-sorter.mjs |  72 +++++++++++++++++++++++++
 package.json          |  10 ++++
 3 files changed, 201 insertions(+)
 create mode 100644 ansi-tunc.mjs
 create mode 100644 grep-mtime-sorter.mjs
 create mode 100644 package.json

diff --git a/ansi-tunc.mjs b/ansi-tunc.mjs
new file mode 100644
index 0000000..a332051
--- /dev/null
+++ b/ansi-tunc.mjs
@@ -0,0 +1,119 @@
+/* VIBE ALERT
+
+This code was generated using OpenAI’s ChatGPT (GPT-5.2 Thinking, large language model).
+The output has not been independently reviewed, audited, or comprehensively validated,
+and has only been superficially tested. It should be considered experimental and not fully vetted for production use.
+
+*/
+
+import fs from 'node:fs';
+import readline from 'node:readline';
+
+const ansiRegex = /\x1b\[(?:[0-9]{1,3}(?:;[0-9]{1,3})*)?[mK]?/g;
+
+function tokenize(line) {
+	const tokens = [];
+	let lastIndex = 0;
+
+	for (const match of line.matchAll(ansiRegex)) {
+		const index = match.index;
+
+		if (index > lastIndex) {
+			tokens.push({ type: 'text', value: line.slice(lastIndex, index) });
+		}
+
+		tokens.push({ type: 'ansi', value: match[0] });
+		lastIndex = index + match[0].length;
+	}
+
+	if (lastIndex < line.length) {
+		tokens.push({ type: 'text', value: line.slice(lastIndex) });
+	}
+
+	return tokens;
+}
+
+function truncateLine(line, maxLength, tabSize=4) {
+	let col = 0;
+	let result = '';
+
+	const tokens = tokenize(line);
+
+	for (const token of tokens) {
+		if (col >= maxLength) {
+			break;
+		}
+
+		if (token.type === 'ansi') {
+			result += token.value;
+		} else {
+			let i = 0;
+
+			while (i < token.value.length && col < maxLength) {
+				const ch = token.value[i];
+
+				if (ch === '\t') {
+					const w = tabSize - (col % tabSize);
+
+					if (col + w > maxLength) {
+						i = token.value.length;
+					} else {
+						result += ' '.repeat(w);
+						col += w;
+						i++;
+					}
+				} else {
+					result += ch;
+					col += 1;
+					i++;
+				}
+			}
+		}
+	}
+
+	return result.replace(/\s+$/, '') + '\x1b[0m';
+}
+function parseArgs(argv) {
+	let filename = '/dev/stdin';
+	let length = 50;
+
+	for (let i = 2; i < argv.length; i++) {
+		const arg = argv[i];
+
+		if (arg === '-l' || arg === '--length') {
+			const value = argv[i + 1];
+			if (value) {
+				length = parseInt(value, 10);
+				i++;
+			}
+		} else {
+			filename = arg;
+		}
+	}
+
+	return { filename, length };
+}
+
+async function main() {
+	const { filename, length } = parseArgs(process.argv);
+
+	let inputStream;
+
+	if (filename === '/dev/stdin') {
+		inputStream = process.stdin;
+	} else {
+		inputStream = fs.createReadStream(filename, { encoding: 'utf8' });
+	}
+
+	const rl = readline.createInterface({
+		input: inputStream,
+		crlfDelay: Infinity,
+	});
+
+	for await (const line of rl) {
+		const truncated = truncateLine(line, length);
+		process.stdout.write(truncated + '\n');
+	}
+}
+
+await main();
diff --git a/grep-mtime-sorter.mjs b/grep-mtime-sorter.mjs
new file mode 100644
index 0000000..1a46ef9
--- /dev/null
+++ b/grep-mtime-sorter.mjs
@@ -0,0 +1,72 @@
+/* VIBE ALERT
+
+This code was generated using OpenAI’s ChatGPT (GPT-5.2 Thinking, large language model).
+The output has not been independently reviewed, audited, or comprehensively validated,
+and has only been superficially tested. It should be considered experimental and not fully vetted for production use.
+
+*/
+
+import fs from 'node:fs';
+import { stat } from 'node:fs/promises';
+
+const lineRe = /^\x1b\[35m\x1b\[K(.*?)\x1b/;
+
+
+function isoFormat(timestamp) {
+	if (timestamp) {
+		const d = new Date(timestamp * 1000);
+		const pad = (n) => String(n).padStart(2, '0');
+		return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())} ${pad(d.getHours())}:${pad(d.getMinutes())}`;
+	} else {
+		return 'Unknown';
+	}
+}
+
+async function getMtime(line) {
+	const m = lineRe.exec(line);
+	if (m) {
+		const filename = m[1];
+		try {
+			const s = await stat(filename);
+			return s.mtimeMs / 1000;
+		} catch {
+			return 0;
+		}
+	} else {
+		throw new Error('Malformed input: ANSI prefix not found');
+	}
+}
+
+async function main() {
+	const input = await new Promise((resolve) => {
+		let data = '';
+		process.stdin.setEncoding('utf8');
+		process.stdin.on('data', (chunk) => { data += chunk; });
+		process.stdin.on('end', () => { resolve(data); });
+	});
+
+	const lines = input.split(/(?<=\n)/);
+
+	const pairs = await Promise.all(
+		lines.map(async (line, index) => {
+			const t = await getMtime(line);
+			return { t, index };
+		})
+	);
+
+	pairs.sort((a, b) => {
+		if (a.t !== b.t) {
+			return a.t - b.t;
+		} else {
+			return a.index - b.index;
+		}
+	});
+
+	for (const { t, index } of pairs) {
+		const ts = isoFormat(t).padStart(16, ' ');
+		process.stdout.write(`\x1b[94m${ts}\x1b[0m `);
+		process.stdout.write(lines[index]);
+	}
+}
+
+await main();
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..49a06a3
--- /dev/null
+++ b/package.json
@@ -0,0 +1,10 @@
+{
+	"name": "ansi-tools",
+	"version": "0.1.0",
+	"type": "module",
+	"private": true,
+	"bin": {
+		"ansi-trunc": "./ansi-trunc.mjs",
+		"grep-mtime-sorter": "./grep-mtime-sorter.mjs"
+	}
+}
\ No newline at end of file