A node logger script

logger-cli.js

/*

SCRIPT WHICH LOGS MISC MESSAGES

Parameters:

  --success      ||
  --error        ||
  --warning      ||
  --info         boolean   Type of log entry, picks first argument found

  --heading      string    a brief log heading
  --description  string    an oprtional log description

*/

process.env.FORCE_COLOR = true;

const
  logger = require("./logger/logger"),
  argv   = require("yargs").argv,
  levels = ["success", "warning", "error", "info"],
  level  = Object.keys(argv).filter(e => levels.includes(e))[0];

const { heading, description } = argv;

if (!level && !heading) return;

logger[level](heading, description);

logger.js

const
  chalk  = require("chalk"),
  length = require('string-length'),
  time   = () => chalk.bold(Date().slice(16,24)),
  logger = {};

const levels = {
  success: {
    color: "green",
    glyph: "✓"
  },
  error: {
    color: "red",
    glyph: "✗"
  },
  warning: {
    color: "yellow",
    glyph: "!"
  },
  info: {
    color: "blue",
    glyph: "○"
  }
}

for (const [level, {color, glyph}] of Object.entries(levels)) {

  logger[level] = (heading, description) => {

    heading = ` ${time()} | ${chalk.bold[color](`${glyph} ${heading}`)}`;
    console.log(heading);

    const hr = " " + chalk.bold.gray("·").repeat(length(heading) - 1);
    if (description) {
      console.log(hr);
      console.log(description, "\n")
    }

    return this;

  }

}

logger.clear = () => {
  console.log("\x1B[2J\x1B[s3J\x1B[H\x1Bc");

  /* Windows (?) bug. Can't chain other methods calls after clear.
     For some reason the method chained after clear, is
     ironically also cleard. Wierd!*/

  return this;
}

module.exports = logger;