initial commit

.gitignore

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+*.gem
+.bundle
+Gemfile.lock
+pkg/*

Gemfile

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+source "http://rubygems.org"
+
+# Specify your gem's dependencies in noexec.gemspec
+gemspec
+
+gem 'rake'

README.md

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+# Noexec
+
+Let's stop using bundle exec, kthx.
+
+## Installation
+
+    gem install noexec
+
+Then, in your .profile (or somewhere you can set env variables)
+
+    RUBYOPT="-r`noexec`"
+
+And you're done!
+
+## How does this work?
+
+It adds a script to every execution of ruby via the RUBYOPT environment variable. Then, when you run ruby, it takes a look at your working directory, and every directory above it until it can find a `Gemfile`. If the executable you're running is present in your Gemfile, it switches to using that `Gemfile` instead (via `Bundle.setup`).

Rakefile

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+require "bundler/gem_tasks"

bin/noexec

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+#!/usr/bin/env ruby
+
+print File.expand_path(File.expand_path("../../lib/noexec/auto.rb", __FILE__))

lib/noexec.rb

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+begin
+  require "bundler"
+
+  module Bundler
+    class << self
+      def reset!
+        @load = nil
+      end
+    end
+  end
+
+  module Noexec
+    CURRENT = Dir.pwd
+    DEBUG = ENV.key?('NOEXEC_DEBUG')
+
+    extend self
+
+    def candidate?(gemfile, bin)
+      ENV['BUNDLE_GEMFILE'] = gemfile
+      Bundler.load.specs.each do |spec|
+        next if spec.name == 'bundler'
+        return spec if spec.executables.include?(bin)
+      end
+      nil
+    ensure
+      Bundler.reset!
+    end
+
+    def setup
+      puts "Noexec" if DEBUG
+      catch(:done) do
+        throw :done, false if File.basename($0) == 'bundle'
+        gemfile = File.join(CURRENT, "Gemfile")
+        while true
+          if File.exist?(gemfile)
+            puts "Examining #{gemfile}" if DEBUG
+            if Noexec.candidate?(gemfile, File.basename($0))
+              puts "Using #{gemfile}" if DEBUG
+              Bundler.setup
+              throw :done, true
+            end
+          end
+          new_gemfile = File.expand_path("../../Gemfile", gemfile)
+          throw :done, false if new_gemfile == gemfile
+          gemfile = new_gemfile
+        end
+        puts "No valid Gemfile found, moving on" if DEBUG
+        false
+      end
+    end
+  end
+rescue LoadError
+  warn "bundler not being used, unable to load"
+end

lib/noexec/auto.rb

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+require File.expand_path('../../noexec', __FILE__)
+
+Noexec.setup

lib/noexec/version.rb

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+module Noexec
+  VERSION = "0.0.1"
+end

noexec.gemspec

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+# -*- encoding: utf-8 -*-
+$:.push File.expand_path("../lib", __FILE__)
+require "noexec/version"
+
+Gem::Specification.new do |s|
+  s.name        = "noexec"
+  s.version     = Noexec::VERSION
+  s.authors     = ["Josh Hull"]
+  s.email       = ["joshbuddy@gmail.com"]
+  s.homepage    = "https://github.com/joshbuddy/noexec"
+  s.summary     = %q{Stop using bundle exec}
+  s.description = %q{Stop using bundle exec.}
+
+  s.rubyforge_project = "noexec"
+
+  s.files         = `git ls-files`.split("\n")
+  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
+  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
+  s.require_paths = ["lib"]
+end