diff options
Diffstat (limited to 'lib/rake/alt_system.rb')
-rw-r--r-- | lib/rake/alt_system.rb | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/lib/rake/alt_system.rb b/lib/rake/alt_system.rb new file mode 100644 index 0000000000..05af19863a --- /dev/null +++ b/lib/rake/alt_system.rb @@ -0,0 +1,109 @@ +# +# Copyright (c) 2008 James M. Lawrence +# +# Permission is hereby granted, free of charge, to any person +# obtaining a copy of this software and associated documentation files +# (the "Software"), to deal in the Software without restriction, +# including without limitation the rights to use, copy, modify, merge, +# publish, distribute, sublicense, and/or sell copies of the Software, +# and to permit persons to whom the Software is furnished to do so, +# subject to the following conditions: +# +# The above copyright notice and this permission notice shall be +# included in all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# + +require 'rbconfig' + +# +# Alternate implementations of system() and backticks `` on Windows +# for ruby-1.8 and earlier. +# +module Rake::AltSystem + WINDOWS = RbConfig::CONFIG["host_os"] =~ + %r!(msdos|mswin|djgpp|mingw|[Ww]indows)! + + class << self + def define_module_function(name, &block) + define_method(name, &block) + module_function(name) + end + end + + if WINDOWS and RUBY_VERSION < "1.9.0" + RUNNABLE_EXTS = %w[com exe bat cmd] + RUNNABLE_PATTERN = %r!\.(#{RUNNABLE_EXTS.join('|')})\Z!i + + define_module_function :kernel_system, &Kernel.method(:system) + define_module_function :kernel_backticks, &Kernel.method(:'`') + + module_function + + def repair_command(cmd) + "call " + ( + if cmd =~ %r!\A\s*\".*?\"! + # already quoted + cmd + elsif match = cmd.match(%r!\A\s*(\S+)!) + if match[1] =~ %r!/! + # avoid x/y.bat interpretation as x with option /y + %Q!"#{match[1]}"! + match.post_match + else + # a shell command will fail if quoted + cmd + end + else + # empty or whitespace + cmd + end + ) + end + + def find_runnable(file) + if file =~ RUNNABLE_PATTERN + file + else + RUNNABLE_EXTS.each { |ext| + if File.exist?(test = "#{file}.#{ext}") + return test + end + } + nil + end + end + + def system(cmd, *args) + repaired = ( + if args.empty? + [repair_command(cmd)] + elsif runnable = find_runnable(cmd) + [File.expand_path(runnable), *args] + else + # non-existent file + [cmd, *args] + end + ) + kernel_system(*repaired) + end + + def backticks(cmd) + kernel_backticks(repair_command(cmd)) + end + + define_module_function :'`', &method(:backticks) + else + # Non-Windows or ruby-1.9+: same as Kernel versions + define_module_function :system, &Kernel.method(:system) + define_module_function :backticks, &Kernel.method(:'`') + define_module_function :'`', &Kernel.method(:'`') + end +end |