d7aa0c0335
Using `git` from `Formula#install` can cause an exec bomb if used in a formula with `env :userpaths` because that causes both `Library/ENV/4.3` and `Library/ENV/scm` to be in PATH, both of which contain a `git` binary that is the same SCM wrapper. Those will mutually exec each other indefinitely as they fail to detect that they are the same wrapper. Extend the exec-bomb protection to check the paths after all symbolic links have been expanded to prevent this situation. Fixes #43. Fixes Homebrew/homebrew-core#133. Fixed Homebrew/homebrew-core#143. Closes #46. Signed-off-by: Martin Afanasjew <martin@afanasjew.de>
64 lines
1.8 KiB
Bash
Executable File
64 lines
1.8 KiB
Bash
Executable File
#!/bin/sh
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# Make sure this shim uses the same Ruby interpreter that is used by Homebrew.
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unset RUBYLIB
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unset RUBYOPT
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if [ -z "$HOMEBREW_RUBY_PATH" ]
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then
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echo "${0##*/}: The build tool has reset ENV; --env=std required." >&2
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exit 1
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fi
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exec "$HOMEBREW_RUBY_PATH" -x "$0" "$@"
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#!/usr/bin/env ruby -W0
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# This script because we support $GIT, $HOMEBREW_SVN, etc., Xcode-only and
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# no Xcode/CLT configurations. Order is careful to be what the user would want.
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require "pathname"
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SELF_REAL = Pathname.new(__FILE__).realpath
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F = File.basename(__FILE__).freeze
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D = File.expand_path(File.dirname(__FILE__)).freeze
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def exec(*args)
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# prevent fork-bombs
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arg0 = args.first
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return if arg0 =~ /^#{F}/i || Pathname.new(arg0).realpath == SELF_REAL
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super
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end
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case F.downcase
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when "git" then %W[HOMEBREW_GIT GIT]
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when "svn" then %W[HOMEBREW_SVN]
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else []
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end.each do |key|
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exec ENV[key], *ARGV if ENV[key] && File.executable?(ENV[key])
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end
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brew_version = File.expand_path("#{D}/../../../bin/#{F}")
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exec brew_version, *ARGV if File.executable? brew_version
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`/usr/bin/which -a #{F} 2>/dev/null`.split("\n").each do |path|
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exec path, *ARGV unless path == "/usr/bin/#{F}"
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end
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popup_stub = false
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if File.executable? "/usr/bin/xcode-select"
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# xcode-select will return empty on no Xcode/CLT configuration.
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# /usr/bin/<tool> will be a popup stub under such configuration.
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# xcrun hangs if xcode-select is set to "/"
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path = `/usr/bin/xcode-select -print-path 2>/dev/null`.chomp
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popup_stub = path.empty?
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if !popup_stub && path != "/"
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path = `/usr/bin/xcrun -find #{F} 2>/dev/null`.chomp
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exec path, *ARGV if File.executable? path
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end
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end
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path = "/Applications/Xcode.app/Contents/Developer/usr/bin/#{F}"
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exec path, *ARGV if File.executable? path
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path = "/usr/bin/#{F}"
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exec path, *ARGV if !popup_stub && File.executable?(path)
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abort "You must: brew install #{F}"
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