@syncify/ansi/src/tsize.ts

ANSI Colors, Symbols and TUI related terminal enchancements for Syncify.

import { execFileSync } from 'node:child_process';
import { dirname, join } from 'node:path';
import { env, platform, stderr, stdout } from 'node:process';
import { fileURLToPath } from 'node:url';

/**
 * Returns `child_process.execFileSync()` method
 */
function exec (command: string, args: string[], shell?: boolean) {

  return execFileSync(command, args, {
    encoding: 'utf8',
    shell,
    stdio: [
      'ignore',
      'pipe',
      'ignore'
    ]
  }).trim();

}

/**
 * Executes Native CJS
 */
function execNative (command: string, shell: boolean) {

  // @ts-ignore
  const __dirname = dirname(fileURLToPath(import.meta.url));
  return exec(join(__dirname, command), [], shell).split(/\r?\n/);

}

/**
 * Returns the columns and rows
 */
function create (columns: number | string, rows: number | string) {

  const cols = Number.parseInt(columns as string, 10);

  return {
    wrap: cols > 85 ? 85 : cols,
    cols: Number.parseInt(columns as string, 10),
    rows: Number.parseInt(rows as string, 10)
  };

};

/**
 * Terminal Size
 *
 * Returns the terminal width (columns) and height (rows).
 *
 * @see https://github.com/sindresorhus/term-size
 */
export function tsize () {

  if (stdout && stdout.columns && stdout.rows) return create(stdout.columns, stdout.rows);
  if (stderr && stderr.columns && stderr.rows) return create(stderr.columns, stderr.rows);

  // These values are static, so not the first choice
  if (env.COLUMNS && env.LINES) return create(env.COLUMNS, env.LINES);

  if (platform === 'win32') {

    try {

      // Binary: https://github.com/sindresorhus/win-term-size
      const size = execNative('vendor/windows/term-size.exe', false);
      if (size.length === 2) return create(size[0], size[1]);

    } catch {}

  } else {

    if (platform === 'darwin') {

      try {

        // Binary: https://github.com/sindresorhus/macos-term-size
        const size = execNative('vendor/macos/term-size', true);
        if (size.length === 2) return create(size[0], size[1]);

      } catch {}

    }

    // `resize` is preferred as it works even when all file descriptors are redirected
    // https://linux.die.net/man/1/resize
    try {

      const size = exec('resize', [ '-u' ]).match(/\d+/g);

      if (size.length === 2) return create(size[0], size[1]);

    } catch {}

    if (env.TERM) {

      try {

        const cols = exec('tput', [ 'cols' ]);
        const rows = exec('tput', [ 'lines' ]);

        if (cols && rows) return create(cols, rows);

      } catch {}

    }
  }

  return create(80, 24);

};