Failed to create .yarn-integrity file in a bower project

[laubstein]

Do you want to request a feature or report a bug?
bug

What is the current behavior?
After run yarn in a simple bower project, I receive: error ENOENT: no such file or directory, open '/tmp/b/node_modules/.yarn-integrity' at Error (native)

If the current behavior is a bug, please provide the steps to reproduce.

bower init (default options)
bower install --save jquery
rm -fr bower_components
yarn

What is the expected behavior?
bower_components created without error message

Please mention your node.js, yarn and operating system version.
Linux

yarn --version = 0.15.1
node --version = v6.4.0

[tony19]

Workaround

Create node_modules/ directory before running yarn.

Bug Research

I think the issue is twofold:

1. writeIntegrityHash() does not create the intermediate directories in the specified path, and fs.writeFile() throws an error for a path with a missing intermediate directory.
2. getIntegrityHashLocation() inserts node_modules/ into the first slot of possibleFolders[], but this directory never existed (as this is strictly a Bower project). This function returns the first slot by default if .yarn-integrity was not found in possibleFolders[]. For a Bower project, the first slot should really be bower_components/.

[Th3Mouk]

This workaround is ok

[tony19]

For some reason, I can't reproduce this error any longer, but I think this workaround might be even better (in that a pre-existing node_modules/ isn't needed):

yarn install --modules-folder bower_components

Let me know if this works for you.

[sebmck]

We've removed support for Bower, see #1441.