How to trace and check dependencies in bundled Ruby gems

Question

Bundler will automatically install any dependencies for the specified gems, however it doesn't output which dependencies map to which gems in the standard output. That information is useful when one of the dependencies fails the installation.

Is there a way to set Bundler to be more verbose and inform about the dependencies while installing?

I am using Bundler 1.0.2

You can however use the "gem dependency" command to show the dependencies of a particular gem. — Himanshu, Oct 06 '10 at 02:02

score 11 · Accepted Answer · edited Jul 05 '16 at 23:25

11

To see a visual representation of the dependency tree run bundle viz:

apt-get install graphviz && gem install ruby-graphviz && bundle viz

It will generate a PNG file of the tree.

edited Jul 05 '16 at 23:25

the Tin Man

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answered Oct 13 '10 at 21:45

Samer Buna

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this won't work if there's still an outstanding unfulfilled gem dependency .. which gets back to the original problem. – dsaronin Mar 06 '12 at 01:03
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For OSX, use homebrew: brew install graphviz && gem install ruby-graphviz && bundle viz – user456584 Aug 22 '12 at 17:33
Would be nice to get a searchable list instead of an image here. Although the image is very cool. – crizCraig May 13 '13 at 21:27
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Want to see a sample output? http://patshaughnessy.net/assets/2011/9/17/gem_graph.png – opsidao Jun 06 '13 at 17:54
This was a horrible way of doing this. With a large amount of gems this becomes useless – Matthias Michael Engh Aug 14 '17 at 20:58
not available anymore – akostadinov Mar 20 '23 at 19:53

score 7 · Answer 2 · edited Jul 05 '16 at 23:31

7

A less exciting, but equally effective way is to just do:

gem dep

which will generate a Gemfile.lock style output with dependency information. You could pipe this output to less:

gem dep | less

Or, if you are searching for a failing dependency, you could grep it with some context. For instance, to find out where my failing Thin dependency was coming from (fails with JRuby), I did:

gem dep | grep -C 15 thin

edited Jul 05 '16 at 23:31

the Tin Man

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answered Feb 07 '14 at 18:02

ipd

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Or `gem dep -R thin` – jwadsack Aug 14 '17 at 22:49

How to trace and check dependencies in bundled Ruby gems

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