3e5ccaf3d2
This extends the approach in #597 to further prevent linkage of formulae that conflict with the system OpenSSL and can cause the issues described in that issue.
82 lines
2.5 KiB
Ruby
82 lines
2.5 KiB
Ruby
#: * `ln`, `link` [`--overwrite`] [`--dry-run`] [`--force`] <formula>:
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#: Symlink all of <formula>'s installed files into the Homebrew prefix. This
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#: is done automatically when you install formulae but can be useful for DIY
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#: installations.
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#:
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#: If `--overwrite` is passed, Homebrew will delete files which already exist in
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#: the prefix while linking.
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#:
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#: If `--dry-run` or `-n` is passed, Homebrew will list all files which would
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#: be linked or which would be deleted by `brew link --overwrite`, but will not
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#: actually link or delete any files.
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#:
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#: If `--force` is passed, Homebrew will allow keg-only formulae to be linked.
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require "ostruct"
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module Homebrew
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def link
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raise KegUnspecifiedError if ARGV.named.empty?
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mode = OpenStruct.new
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mode.overwrite = true if ARGV.include? "--overwrite"
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mode.dry_run = true if ARGV.dry_run?
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ARGV.kegs.each do |keg|
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keg_only = keg_only?(keg.rack)
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if HOMEBREW_PREFIX.to_s == "/usr/local" && keg_only &&
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keg.name.start_with?("openssl", "libressl")
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opoo <<-EOS.undent
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Refusing to link: #{keg.name}
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Linking keg-only #{keg.name} means you may end up linking against the insecure,
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deprecated system OpenSSL while using the headers from Homebrew's #{keg.name}.
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Instead, pass the full include/library paths to your compiler e.g.:
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-I#{HOMEBREW_PREFIX}/opt/#{keg.name}/include -L#{HOMEBREW_PREFIX}/opt/#{keg.name}/lib
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EOS
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next
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elsif keg.linked?
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opoo "Already linked: #{keg}"
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puts "To relink: brew unlink #{keg.name} && brew link #{keg.name}"
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next
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elsif keg_only && !ARGV.force?
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opoo "#{keg.name} is keg-only and must be linked with --force"
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puts "Note that doing so can interfere with building software."
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next
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elsif mode.dry_run && mode.overwrite
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puts "Would remove:"
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keg.link(mode)
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next
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elsif mode.dry_run
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puts "Would link:"
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keg.link(mode)
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next
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end
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keg.lock do
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print "Linking #{keg}... "
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puts if ARGV.verbose?
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begin
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n = keg.link(mode)
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rescue Keg::LinkError
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puts
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raise
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else
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puts "#{n} symlinks created"
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end
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end
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end
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end
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private
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def keg_only?(rack)
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Formulary.from_rack(rack).keg_only?
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rescue FormulaUnavailableError, TapFormulaAmbiguityError, TapFormulaWithOldnameAmbiguityError
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false
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end
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end
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