From 3d0ecf32542ece3ab4893694e1a83028d043a75f Mon Sep 17 00:00:00 2001
From: Alex Legler <alex@a3li.li>
Date: Fri, 3 Jul 2015 11:41:10 +0200
Subject: [PATCH] Add USE flag list generator, ignore result file

---
 .gitignore       |  1 +
 bin/use-index.rb | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 .gitignore
 create mode 100755 bin/use-index.rb

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000..31a33a02b6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+files/packages/use.json
diff --git a/bin/use-index.rb b/bin/use-index.rb
new file mode 100755
index 0000000000..c0a968bf7e
--- /dev/null
+++ b/bin/use-index.rb
@@ -0,0 +1,29 @@
+#!/usr/bin/env ruby
+
+require 'json'
+
+GLOBAL = '/usr/portage/profiles/use.desc'
+LOCAL  = '/usr/portage/profiles/use.local.desc'
+
+output = { 'global' => {}, 'local' => {} }
+
+File.readlines(GLOBAL).each do |line|
+  next if line =~ /^(|#.*)$/
+
+  flag, desc = line.strip.split(' - ', 2)
+  output['global'][flag] = desc
+end
+
+File.readlines(LOCAL).each do |line|
+  next if line =~ /^(|#.*)$/
+
+  atom_flag, desc = line.strip.split(' - ', 2)
+  atom, flag      = atom_flag.split(':', 2)
+  cat, pkg        = atom.split('/', 2)
+
+  output['local'][cat]          ||= {}
+  output['local'][cat][pkg]     ||= {}
+  output['local'][cat][pkg][flag] = desc
+end
+
+puts output.to_json