refactors index building script to output JSON

also removes index.md

scripts/build_index.rb

@@ -0,0 +1,25 @@
+#!/usr/bin/env ruby
+
+require "json"
+
+commands = {}
+
+Dir["#{ENV["TLDRHOME"]}/pages/**/*.md"].each do |file|
+    # "./pages/osx/xsltproc.md",
+    file = file.split("/")
+    name = file.pop().gsub(".md","")
+    platform = file.pop()
+
+    unless commands.key?(name)
+        commands[name] = {
+            name: name,
+            platform: [platform]
+        } 
+    else
+        commands[name][:platform] << platform
+    end
+end
+
+commands = commands.map do |k,v| v end
+
+File.write("#{ENV["TLDRHOME"]}/pages/index.json", {commands: commands}.to_json)