Tail laravel logs, skipping stack traces

tailer.js

#!/usr/bin/env node
const fs = require("fs");
const readline = require("readline");
const { spawn } = require("child_process");
const path = require("path");

// Parse command line arguments
const args = process.argv.slice(2);
const options = {
  reset: args.includes("--reset"),
  all: args.includes("--all"),
  skipVendor: args.includes("--skip-vendor"),
};
console.clear();

// Remove options from args to get potential filepath
const filepath =
  args.filter((arg) => !arg.startsWith("--"))[0] ||
  path.join(process.cwd(), "storage", "logs", "laravel.log");

// Default skip patterns
const skippable = [/^#/, /^\[stacktrace\]/, /^"} {"uid"/];

const isSkippable = (line) => {
  // Don't skip anything if --all is specified
  if (options.all) return false;

  // Special handling for --skip-vendor
  if (options.skipVendor) {
    if (line.startsWith("#") && line.includes("/vendor")) {
      return true;
    }
  }
  if (["[", "#"].indexOf(line[0]) === -1) {
    return true;
  }

  // Regular skip patterns
  return skippable.some((regex) => regex.test(line));
};

// Reset log file if requested
if (options.reset && fs.existsSync(filepath)) {
  try {
    fs.unlinkSync(filepath);
    fs.writeFileSync(filepath, "", { flag: "w" });
    console.log(`Log file reset: ${filepath}`);
  } catch (error) {
    console.error(`Error resetting log file: ${error.message}`);
    process.exit(1);
  }
}

// Validate the file exists
if (!fs.existsSync(filepath)) {
  console.error(`Error: File not found: ${filepath}`);
  console.error(
    "Usage: node script.js [filepath] [--reset] [--all] [--skip-vendor]"
  );
  process.exit(1);
}

// Print startup information
console.log(`Monitoring: ${filepath}`);
if (options.all) {
  console.log("Mode: Showing all log entries (--all)");
} else if (options.skipVendor) {
  console.log("Mode: Skipping vendor paths (--skip-vendor)");
} else {
  console.log("Mode: Standard filtering");
}
console.log("Waiting for new log entries...");

// Use tail -f -n 0 to only show new lines (skip existing content)
const tail = spawn("tail", ["-f", "-n", "0", filepath]);
const rl = readline.createInterface({
  input: tail.stdout,
  crlfDelay: Infinity,
});

let skipped = 0;
let timeoutId = null;

const checkTimeout = () => {
  if (skipped > 0) {
    console.log(`${skipped} lines skipped`);
    skipped = 0;
  }
};

rl.on("line", (line) => {
  // Clear any existing timeout
  if (timeoutId) {
    clearTimeout(timeoutId);
  }

  // Set a new timeout
  timeoutId = setTimeout(checkTimeout, 100);

  if (isSkippable(line)) {
    skipped++;
  } else {
    if (skipped > 0) {
      console.log(`${skipped} lines skipped`);
      skipped = 0;
    }
    console.log(line);
  }
});

// Handle errors
tail.stderr.on("data", (data) => {
  console.error(`Error: ${data}`);
});

// Handle process exit
process.on("SIGINT", () => {
  if (skipped > 0) {
    console.log(`${skipped} lines skipped`);
  }
  console.log("Monitoring stopped");
  tail.kill();
  process.exit(0);
});