when run as non-root, bundle install fails #66
Description
If I run this container image with "--user nobody" then bundler fails to work by default:
docker run -t -i --user nobody ruby:2.2 bash
nobody@bbc3bf13161b:/$ cd /tmp/
nobody@bbc3bf13161b:/tmp$ cat > Gemfile
source "https://rubygems.org"
gem "json"
nobody@bbc3bf13161b:/tmp$ bundle install --path .
There was an error while trying to write to `/usr/local/bundle/config`. It is likely that you need to grant write permissions for that path.
nobody@bbc3bf13161b:/tmp$ BUNDLE_APP_CONFIG=. bundle install --path .
Fetching gem metadata from https://rubygems.org/..
Fetching version metadata from https://rubygems.org/.
Resolving dependencies...
Installing json 1.8.3 with native extensions
Using bundler 1.11.2
Bundle complete! 1 Gemfile dependency, 2 gems now installed.
Bundled gems are installed into ..
This is because bundler tries to create a /usr/local/bundle/config if it doesn't exist, but it doesn't have write permissions to /usr/local/bundle
I'm not sure of the right fix for this. Creating that config file and making it world writeable would work. Configuring bundler to use a config on /tmp would also work - unsure how best to do that right now.