From dba9675ed37c98efebada330c562bc0410fb20aa Mon Sep 17 00:00:00 2001 From: Alex Dunn Date: Fri, 8 May 2015 14:37:15 +0800 Subject: add EmacsRequirement Closes Homebrew/homebrew#39326. Signed-off-by: Xu Cheng --- Library/Homebrew/requirements/emacs_requirement.rb | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 Library/Homebrew/requirements/emacs_requirement.rb (limited to 'Library/Homebrew/requirements') diff --git a/Library/Homebrew/requirements/emacs_requirement.rb b/Library/Homebrew/requirements/emacs_requirement.rb new file mode 100644 index 000000000..1da3ecd04 --- /dev/null +++ b/Library/Homebrew/requirements/emacs_requirement.rb @@ -0,0 +1,30 @@ +class EmacsRequirement < Requirement + fatal true + default_formula "emacs" + + def initialize(tags) + @version = tags.shift if /\d+\.*\d*/ === tags.first + raise "Specify a version for EmacsRequirement" unless @version + super + end + + satisfy :build_env => false do + next unless which "emacs" + emacs_version = Utils.popen_read("emacs", "--batch", "--eval", "(princ emacs-version)") + Version.new(emacs_version) >= Version.new(@version) + end + + env do + ENV.prepend_path "PATH", which("emacs").dirname + end + + def message + s = "Emacs #{@version} or later is required." + s += super + s + end + + def inspect + "#<#{self.class.name}: #{name.inspect} #{tags.inspect} version=#{@version.inspect}>" + end +end -- cgit v1.2.3