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random code and what not

CircleCI: Could not get cache stat, action npm install failed

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Our builds started to randomly fail on CircleCI when executing npm install:

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npm install
npm ERR! Could not get cache stat 
npm ERR! Could not get cache stat 
npm ERR! Could not get cache stat 
npm ERR! Linux 3.14.28-031428-generic
npm ERR! argv "node" "/home/ubuntu/nvm/v0.10.32/bin/npm" "install"
npm ERR! node v0.10.32
npm ERR! npm  v2.1.16
npm ERR! path /home/ubuntu/.npm/_git-remotes/git-github-com-SOMEPATH-ON-GITHUB-2799bac7/objects/pack/pack-ba6de98838bb215ca34b4ebaac78c6dbad04a80b.keep
npm ERR! code ENOENT
npm ERR! errno 34

npm ERR! enoent ENOENT, chown '/home/ubuntu/.npm/_git-remotes/git-github-com-SOMEPATH-ON-GITHUB-2799bac7/objects/pack/pack-ba6de98838bb215ca34b4ebaac78c6dbad04a80b.keep'
npm ERR! enoent This is most likely not a problem with npm itself
npm ERR! enoent and is related to npm not being able to find a file.
npm ERR! enoent 

npm ERR! Please include the following file with any support request:
npm ERR!     /home/ubuntu/PROJECT-NAME/npm-debug.log

npm install returned exit code 34
action npm install failed

Sometimes it would take re-running the build 3 or 4 times before going green.

Each failure was always due to installing via Git URL.

Adding ~/.npm/_git-remotes/ to the cache_directories of the circle configuration fixed the majority of these issues:

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machine:
  node:
    version: 0.10.32
dependencies:
  cache_directories:
    - "node_modules"
    - "~/.npm/_git-remotes/"
  override:
    - npm prune && npm install
  post:
    - bower install

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