Unable to install

[sly7-7]

During ember install ember-decorators, when installing babel-eslint package, this error is thrown:

"ENOENT: no such file or directory, copyfile '/Users/sma01/Library/Caches/Yarn/v1/npm-@babel/generator-7.0.0-beta.44-c7e67b9b5284afcf69b309b50d7d37f3e5033d42/README.md' ->'/Users/sma01/work/git/gitlab/erdil/esatis/frontend/node_modules/@babel/generator/README.md'"

[pzuraq]

It looks like this is a failure within the package manager, we don’t do any manual copying within node_modules.

[rtablada]

I've run into this as well. I'm not sure quite where the issue is and haven't tried reliably recreating this.

But I suspect that the pattern to recreate looks something like:

ember new foo --yarn
ember install ember-cli-typescript
ember install ember-decorators

I'm not sure if the error is in decorators, CLI, or yarn.

I'll try to investigate later this weekend though because I've run into it on two projects today... 😢

My work around was to remove the yarn.lock file, remove node_modules, install with npm, run ember g ember-decorators, then either keep using npm for the project or remove all node_modules and rebuild with yarn.

[pzuraq]

I'm wondering if it may be trying to install both addons at once and is running yarn multiple times, I know yarn has issues with parallelization in general and running it twice in the same project could be an issue

[pzuraq]

I merged a change to run the installs sequentially instead of in parallel. Let me know if that appears to work!