Error: Command failed: node lib

[ghost]

After adding:

    "env": {
      "browser": true
    }

I received the error:

Error: Command failed: node lib
module.js:474
throw err;
^

Error: Cannot find module

I cannot go past this step and I have went back and checked my code. Everything matches accordingly.

[verekia]

You likely haven't compiled your src folder into the lib folder via Gulp / Babel before running node lib.

[ghost]

Doesn't gulp do this with build?

[verekia]

Yes it does it, but maybe you're missing something in your Gulp file like prerequisite tasks.

[verekia]

Compare the provided Gulp file with yours and you should find the difference :)

[ghost]

The provided Gulp file is finished for Section 7. But I compared with the gulp file on section 6 and my file is exact. I compared against section 6 because I just finished section 6 and am at the very top of section 7.

/* eslint-disable import/no-extraneous-dependencies */
/* eslint-disable no-console */

import gulp from 'gulp';
import babel from 'gulp-babel';
import eslint from 'gulp-eslint';
import del from 'del';
import { exec } from 'child_process';

const paths = {
  allSrcJs: 'src/**/*.js',
  gulpFile: 'gulpfile.babel.js',
  libDir: 'lib',
};

gulp.task('lint', () =>
  gulp.src([
    paths.allSrcJs,
    paths.gulpFile,
  ])
    .pipe(eslint())
    .pipe(eslint.format())
    .pipe(eslint.failAfterError())
);

gulp.task('clean', () => del(paths.libDir));

gulp.task('build', ['lint', 'clean'], () =>
  gulp.src(paths.allSrcJs)
    .pipe(babel())
    .pipe(gulp.dest(paths.libDir))
);

gulp.task('main', ['build'], (callback) => {
  exec(`node ${paths.libDir}`, (error, stdout) => {
    console.log(stdout);
    return callback(error);
  });
});

gulp.task('watch', () => {
  gulp.watch(paths.allSrcJs, ['main']);
});

gulp.task('default', ['watch', 'main']);

[ghost]

I just kept going and since lib is not referenced after webpack the errors are gone. I am working on a windows machine so there could be an issue due to different environment.

[lxblvs]

Same problem on a linux machine.

The weird bit in the error is

Error: Cannot find module '/home/alex/thingies/js-test/lib'

I have the lib module in the root. Is it something about the task ordering? Here is my gulpfile:

/* eslint-disable import/no-extraneous-dependencies */

import gulp from 'gulp';
import babel from 'gulp-babel';
import del from 'del';
import { exec } from 'child_process';
import eslint from 'gulp-eslint';


const paths = {
    allSrcJs: 'src/**/*.js',
    gulpFile: 'gulpfile.babel.js',
    libDir: 'lib',
};

gulp.task('clean', () =>
    del(paths.libDir)
);

gulp.task('build', ['lint', 'clean'], () =>
    gulp.src(paths.allSrcJs)
        .pipe(babel())
        .pipe(gulp.dest(paths.libDir))
);

gulp.task('main', ['build'], (callback) => {
    exec(`node ${paths.libDir}`, (error, stdout) => {
        console.log(stdout);
        return callback(error);
    });
});

gulp.task('watch', () => {
    gulp.watch([paths.allSrcJs, paths.gulpFile], ['main']);
});

gulp.task('default', ['watch', 'main']);

gulp.task('lint', () =>
    gulp.src([
        paths.allSrcJs,
    ])
        .pipe(eslint())
        .pipe(eslint.format())
        .pipe(eslint.failAfterError())
);

[verekia]

Okay, I was able to reproduce the issue.

The problem is that you need to go further in that chapter to reach a build-able state. It is still in the middle of setting things up, and the build is not expected to work at every intermediate state such as this one. Just keep following instructions and you'll get a working build soon enough :)

[verekia]

Closing for now. If more people keep getting confused with the build not working at such intermediate states, I'll change the readme to make it clearer. If you're one of these people, please upvote @sgatlf's original comment!