When running the command "npm bin", I encountered the following error message: "/usr/local/bin/X: 1: /usr/local/bin/X: Syntax error: "(" unexpected"

Currently, I am attempting to create an npm bin that generates a file in the current directory.

// ./index.js
const program = require('commander');
const fs = require('fs');
const path = require('path');

program
  .command('c <name> <content>')
  .action((name, content) => {
    fs.writeFile(path.resolve(process.cwd(), name), content, err => err ? console.error(err) : console.log('Success'));
  });

program.parse(process.argv);

The issue persists even if I replace the writeFile with a console.log.

Below is my package.json :

{
  "name": "test-crayzzit",
  "dependencies": {
    "commander": "^2.19.0"
  },
  "bin": {
    "testcc": "./index.js"
  },
  "version": "1.0.3"
}

Everything functions correctly when I use something like node index.js test.txt hello

However, after installing the package with npm using: sudo npm i -g test-crayzzit

And running: testcc c test.txt hello

An error occurs:

/usr/local/bin/testcc: 1: /usr/local/bin/testcc: Syntax error: "(" unexpected

Feel free to experiment with the package: https://www.npmjs.com/package/test-crayzzit

Answer №1

It seems like the shebang is missing from your index.js file. The initial line should be:

#!/usr/bin/env node

Additionally, make sure the file has LF line endings for proper reading on MacOS, Linux, and Windows if you plan to use the package across different platforms.

UPDATE: I tested your package (encountered the same issue on Linux). Adding the shebang as specified above resolved the problem for me.

Check out this link too: Appropriate hashbang for Node.js scripts

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