mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-30 09:33:41 +00:00
6ffb5079b2
This allows getting access to Ruby documentation through ri by doing
nix-shell -p ruby ruby.devdoc
or by installing the ruby.devdoc package.
A setup hook will add a shim to LOAD_PATH to point ri to the devdoc
output instead of out.
26 lines
1014 B
Ruby
26 lines
1014 B
Ruby
# This is a shim around whatever real rbconfig.rb is in the LOAD_PATH,
|
|
# so that RbConfig::CONFIG["ridir"] can be overridden to point to the
|
|
# custom location of the ri docs, without the main derivation having
|
|
# those docs in its closure.
|
|
|
|
MY_PATH = File.realpath(__FILE__)
|
|
|
|
candidates = $LOAD_PATH.map { |dir| File.join(dir, "rbconfig.rb") }
|
|
|
|
# First, drop everything _before_ this file in the LOAD_PATH, just on
|
|
# the off-chance somebody is composing shims like this for some reason.
|
|
candidates.drop_while { |c| !File.exist?(c) || File.realpath(c) != MY_PATH }
|
|
|
|
# Now, the wrapped rbconfig.rb is the next rbconfig.rb in the LOAD_PATH
|
|
# that isn't this same file. (Yes, duplicate LOAD_PATH entries are a
|
|
# thing we have to deal with.)
|
|
next_rbconfig = candidates.find { |c|
|
|
File.exist?(c) && File.realpath(c) != MY_PATH
|
|
}
|
|
|
|
# Load the wrapped rbconfig.rb
|
|
require next_rbconfig
|
|
|
|
# Now we have RbConfig, and can modify it for our own ends.
|
|
RbConfig::CONFIG["ridir"] = File.expand_path("../../../share/ri", __dir__)
|