pyrox.dev
1require 'rbconfig'
2require 'rubygems'
3require 'rubygems/specification'
4require 'fileutils'
5
6ruby = File.join(ENV["ruby"], "bin", RbConfig::CONFIG['ruby_install_name'])
7out = ENV["out"]
8bin_path = File.join(ENV["out"], "bin")
9gem_home = ENV["GEM_HOME"]
10gem_path = ENV["GEM_PATH"].split(File::PATH_SEPARATOR).uniq
11install_path = Dir.glob("#{gem_home}/gems/*").first
12gemspec_path = ARGV[0]
13
14if defined?(Encoding.default_internal)
15 Encoding.default_internal = Encoding::UTF_8
16 Encoding.default_external = Encoding::UTF_8
17end
18
19gemspec_content = File.read(gemspec_path)
20spec = nil
21if gemspec_content[0..2] == "---" # YAML header
22 spec = Gem::Specification.from_yaml(gemspec_content)
23else
24 spec = Gem::Specification.load(gemspec_path)
25end
26
27FileUtils.mkdir_p("#{out}/nix-support")
28
29# write meta-data
30meta = "#{out}/nix-support/gem-meta"
31FileUtils.mkdir_p(meta)
32FileUtils.ln_s(gemspec_path, "#{meta}/spec")
33File.open("#{meta}/name", "w") do |f|
34 f.write(spec.name)
35end
36File.open("#{meta}/install-path", "w") do |f|
37 f.write(install_path)
38end
39File.open("#{meta}/require-paths", "w") do |f|
40 f.write(spec.require_paths.join(" "))
41end
42File.open("#{meta}/executables", "w") do |f|
43 f.write(spec.executables.join(" "))
44end
45
46# add this gem to the GEM_PATH for dependencies
47File.open("#{out}/nix-support/setup-hook", "a") do |f|
48 f.puts("addToSearchPath GEM_PATH #{gem_home}")
49 spec.require_paths.each do |dir|
50 f.puts("addToSearchPath RUBYLIB #{install_path}/#{dir}")
51 end
52end
53
54# create regular rubygems binstubs
55FileUtils.mkdir_p(bin_path)
56spec.executables.each do |exe|
57 File.open("#{bin_path}/#{exe}", "w") do |f|
58 f.write(<<-EOF)
59#!#{ruby}
60#
61# This file was generated by Nix.
62#
63# The application '#{exe}' is installed as part of a gem, and
64# this file is here to facilitate running it.
65#
66
67require 'rubygems'
68
69Gem.paths = {
70 'GEM_PATH' => (
71 ENV['GEM_PATH'].to_s.split(File::PATH_SEPARATOR) +
72 #{([gem_home] + gem_path).to_s}
73 ).join(File::PATH_SEPARATOR)
74}
75
76load Gem.activate_bin_path(#{spec.name.inspect}, #{exe.inspect}, #{spec.version.to_s.inspect})
77 EOF
78 end
79
80 FileUtils.chmod("+x", "#{bin_path}/#{exe}")
81end