Demo repo for bazel-contrib/rules_nodejs#871

Issue

Packages in yarn workspaces are symlinked in the node_modules folder, causing an auto-removing BUILD.bazel file when the bazel workspace is configured with yarn_install.

Example

1. Test with npm_install, example output:

   $ bazel build //packages/component1:@myorg/component1 //packages/component2:@myorg/component2 
   Starting local Bazel server and connecting to it...
   INFO: Analyzed 2 targets (60 packages loaded, 850 targets configured).
   INFO: Found 2 targets...
   INFO: Deleting stale sandbox base /dev/shm/bazel-sandbox.97e3348635132ef4acbb5fe3f5c35b97
   INFO: Elapsed time: 61.713s, Critical Path: 3.52s
   INFO: 4 processes: 2 local, 2 worker.
   INFO: Build completed successfully, 17 total actions
   
   $ ls -la node_modules/@myorg/
   ls: cannot access 'node_modules/@myorg/': No such file or directory
   

2. Clean:

   rm -rf node_modules/
   bazel clean --expunge --async
   

3. Edit WORKSPACE to switch npm_install → yarn_install
4. Test with yarn_install:

   $ bazel build //packages/component1:@myorg/component1 //packages/component2:@myorg/component2 
   Starting local Bazel server and connecting to it...
   ERROR: Skipping '//packages/component1:@myorg/component1': no such package 'packages/component1': BUILD file not found in any of the following directories.
    - /home/vagrant/Projects/bazel-components-repo/packages/component1
   ERROR: no such package 'packages/component1': BUILD file not found in any of the following directories.
    - /home/vagrant/Projects/bazel-components-repo/packages/component1
   INFO: Elapsed time: 15.992s
   INFO: 0 processes.
   FAILED: Build did NOT complete successfully (0 packages loaded)
   
   $ ls -la node_modules/@myorg
   ls -la node_modules/@myorg/
   total 24
   drwxrwxr-x   2 vagrant vagrant  4096 Jul 29 12:52 .
   drwxrwxr-x 592 vagrant vagrant 20480 Jul 29 12:52 ..
   lrwxrwxrwx   1 vagrant vagrant    25 Jul 29 12:52 component1 -> ../../packages/component1
   lrwxrwxrwx   1 vagrant vagrant    25 Jul 29 12:52 component2 -> ../../packages/component2
   
   $ git status
   On branch master
   Changes not staged for commit:
     (use "git add/rm <file>..." to update what will be committed)
     (use "git checkout -- <file>..." to discard changes in working directory)
   
   	deleted:    packages/component1/BUILD.bazel
   	deleted:    packages/component2/BUILD.bazel
   
   Untracked files:
     (use "git add <file>..." to include in what will be committed)
   
   	packages/component1/_BUILD.bazel
   	packages/component2/_BUILD.bazel
   
   no changes added to commit (use "git add" and/or "git commit -a")