lib/build/environment/system.rb
# Copyright, 2012, by Samuel G. D. Williams. <http://www.codeotaku.com>
#
# 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.
module Build
class Environment
module System
def self.shell_escape(value)
case value
when Array
value.flatten.collect{|argument| shell_escape(argument)}.join(' ')
else
# Ensure that any whitespace has been escaped:
value.to_s.gsub(/ /, '\ ')
end
end
def self.valid_for_export(value)
case value
when Array
true
when Symbol
false
when Proc
false
when Default
false
when Replace
false
when Define
false
else
true
end
end
def self.convert_to_shell(environment)
values = environment.values.select{|key, value| valid_for_export(value)}
Hash[values.map{|key, value| [
key.to_s.upcase,
shell_escape(value)
]}]
end
end
# Construct an environment from a given system environment:
def self.system_environment(env = ENV, **options)
self.new(nil, Hash[env.map{|key, value| [key.downcase.to_sym, value]}], **options)
end
# Make a hash appropriate for a process environment
def export
System.convert_to_shell(self)
end
end
end