v 0.0.1 envdir

README.markdown

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+# json2env
+
+This is a simple tool for converting JSON into an envdir. It will take a json file or read from stdin.
+
+    $ json2env -f env.json dir
+
+or 
+
+    $ cat env.json | json2env dir
+
+Then you can execute a program with this env using the envdir tool. 
+
+
+    $ envdir dir program
+

Rakefile

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+require 'jeweler'
+
+Jeweler::Tasks.new do |s|
+	s.name = "json2env"
+	s.description = "convert json to an envdir"
+	s.summary = s.description
+	s.author = "Orion Henry"
+	s.email = "orion@heroku.com"
+	s.homepage = "http://github.com/orionz/json2env"
+	s.rubyforge_project = "json2env"
+	s.files = FileList["[A-Z]*", "{bin,default,lib,spec}/**/*"]
+	s.executables = %w(json2env)
+	s.add_dependency "json"
+end
+
+Jeweler::RubyforgeTasks.new
+
+desc 'Run specs'
+task :spec do
+	sh 'bacon -s spec/*_spec.rb'
+end
+
+task :default => :spec
+

VERSION

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+0.0.1

bin/json2env

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+#!/usr/bin/env ruby
+
+require 'optparse'
+require File.dirname(__FILE__) + "/../lib/json2env"
+
+
+options = { :io => STDIN }
+
+ARGV.unshift "-h" if ARGV.size == 0
+
+optparse = OptionParser.new do|opts|
+  opts.banner = <<banner
+Usage: json2env [-f json.file] envdir
+banner
+  opts.on( '-f', '--file FILE', 'Specify a json file, default is stdin' ) do |file|
+    if (File.exists?(file))
+      options[:io] = File.open(file, "r")
+    end
+  end
+  opts.on( '-h', '--help', 'Display this screen' ) do
+    puts opts
+    exit
+  end
+end
+
+optparse.parse!
+
+envdir = ARGV.shift 
+json = options[:io].read
+
+begin 
+  JSON2Env.new(json,envdir).create;
+rescue JSON::ParserError
+  puts "Invalid JSON format"
+  exit 1
+rescue JSON2Env::TargetNotADirectory
+  puts "Cannot make envdir - file #{envdir} in the way"
+  exit 2
+rescue JSON2Env::TargetHasSubdirs 
+  puts "Cowardly refusing to delete the target dir - it has subdirs"
+  exit 3
+end
+

lib/json2env.rb

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+require 'json'
+
+class JSON2Env
+  attr_accessor :env, :dir
+
+  class TargetHasSubdirs < Exception ; end 
+  class TargetNotADirectory < Exception ; end 
+
+  def initialize(json, dir)
+    @env = JSON.load(json)
+    @dir = dir
+  end
+
+  def create
+    if File.exists?(dir)
+      raise TargetNotADirectory unless File.directory?(dir)
+      clean_dir
+    end
+    Dir.mkdir(dir)
+    @env.each do |key, value| 
+      File.open("#{dir}/#{key}", "w") do |file|
+        file.write(value.gsub(/\r\n|\r|\n/, "\0"))
+      end
+    end
+  end
+
+  def clean_dir
+    raise TargetHasSubdirs if files.detect { |f| File.directory?(f) }
+    files.each { |f| File.delete(f) }
+    Dir.delete(@dir);
+  end
+
+  def files
+    Dir.glob("#{@dir}/*")
+  end
+end
+