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author | zimbatm <zimbatm@zimbatm.com> | 2016-08-29 22:12:44 +0100 |
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committer | zimbatm <zimbatm@zimbatm.com> | 2016-08-29 22:17:59 +0100 |
commit | a7cf555e2a744403817bfe2647c030eaa2cd66c7 (patch) | |
tree | 384f655a50dad00faaef8a09fe373b23a0001b8f /lib/systems.nix | |
parent | b046ebbb7ccaa023f874f6359ad60441ac00f241 (diff) | |
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buildRubyGem: handle build-time ruby dependencies
For some reason `gem install` unsets the GEM_PATH environment variable internally unless the install dir is provided. This in turn means that if it invokes extconf.rb and extconf.rb depends on a gem available on the GEM_PATH (like pkg-config for nokogiri) then it's not available in that context. Proof: https://github.com/rubygems/rubygems/blob/d8293c472966cb1de08784dfdd90560e56ceed84/lib/rubygems/commands/install_command.rb#L151 Blame: https://github.com/rubygems/rubygems/commit/9ea600c9c2b77d1459526fe1e2bcdf2ac778c24a This is a hack that sets the :install_dir to where we would install anyways (the GEM_HOME is the default installation destination).
Diffstat (limited to 'lib/systems.nix')
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