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ruby: Fix mutually dependent links edge-case

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Fixes Homebrew/homebrew#28759.
Closes Homebrew/homebrew#29600.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
This commit is contained in:
Robert Buonpastore 2014-05-26 17:14:55 -04:00 committed by Jack Nagel
parent 462147caa0
commit 42f8ac66fb
1 changed files with 13 additions and 8 deletions
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21
Formula/ruby.rb
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@ -62,16 +62,21 @@ class Ruby < Formula
end
def post_install
# Put gem, site and vendor folders in the HOMEBREW_PREFIX
# Preserve gem, site, and vendor folders on upgrade/reinstall
# by placing them in HOMEBREW_PREFIX and sym-linking
ruby_lib = HOMEBREW_PREFIX/"lib/ruby"
(ruby_lib/'site_ruby').mkpath
(ruby_lib/'vendor_ruby').mkpath
(ruby_lib/'gems').mkpath
rm_rf Dir["#{lib}/ruby/{site_ruby,vendor_ruby,gems}"]
(lib/'ruby').install_symlink ruby_lib/'site_ruby',
ruby_lib/'vendor_ruby',
ruby_lib/'gems'
["gems", "site_ruby", "vendor_ruby"].each do |name|
link = lib/"ruby"/name
real = ruby_lib/name
# only overwrite invalid (mutually dependent) links
real.unlink if real.symlink? && real.readlink == link
real.mkpath
link.unlink if link.exist?
link.symlink real
end
end
def caveats; <<-EOS.undent