Copy error when trying to run a generator in the same environment twice

[mwebler]

Hello there,

I'm not sure if this is supposed to work like this or if this is an error. But, when you call the same environment to run a generator again, it causes an assertion error for copy and copyTpl with glob patterns:

AssertionError: Trying to copy from a source that does not exist: envir-test/node_modules/generator-generator/subgenerator/templates/templates/**

Example :

const yeoman = require('yeoman-environment');
const env = yeoman.createEnv();

env.lookup(() => {
  env.run('generator', {'skip-install': true}, err => {
    console.log('done');
    env.run('generator', {'skip-install': true}, err => {
        console.log('done');
    });
  });
});

Everything works fine if I create a new environment each time I execute the generator.

Versions:

• yeoman-environment: "^1.6.6"
• generator-generator: "^3.1.0",
• Node v7.10.0
• Windows 10

[SBoudrias]

Do you have the generator code?

[mwebler]

The error occurs using any generator which uses glob patterns in copy calls.

In the example above I'm running the generator-generator v3.1.0.

--EDIT--
To be more specific, just create an app following this gist,
It tries to run twice the generator-generator.

[rgroothuijsen]

From what I can see by debugging the copy function, it adds files that were previously requested to an in-memory store, and somewhere along the way the globbed path is added to the list. On subsequent calls, it then mistakenly treats this as a literal path.

Edit: I think I found the issue. It's not what I'd expect to happen, but it happens when the code checks if a file path exists. At this point, mem-fs wrongly adds the invalid path entry to its store.

[github-actions]

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