bundle env command (inspired by @Peeja)

closes #2270

1 files changed, 56 insertions, 0 deletions

diff --git a/lib/bundler/env.rb b/lib/bundler/env.rb
new file mode 100644
index 0000000000..4229076151
--- /dev/null
+++ b/lib/bundler/env.rb
@@ -0,0 +1,56 @@
+module Bundler
+  class Env
+
+    def write(io)
+      io.write(report)
+    end
+
+    def report
+      out = "Bundler #{Bundler::VERSION}\n"
+
+      out << "Ruby #{RUBY_VERSION} (#{RUBY_RELEASE_DATE}"
+      out << " patchlevel #{RUBY_PATCHLEVEL}" if defined? RUBY_PATCHLEVEL
+      out << ") [#{RUBY_PLATFORM}]\n"
+
+      out << "Rubygems #{Gem::VERSION}\n"
+
+      out << "rvm #{ENV['rvm_version']}\n" if ENV['rvm_version']
+
+      out << "GEM_HOME #{ENV['GEM_HOME']}\n"
+
+      out << "GEM_PATH #{ENV['GEM_PATH']}\n" unless ENV['GEM_PATH'] == ENV['GEM_HOME']
+
+      %w(rubygems-bundler open_gem).each do |name|
+        specs = Gem::Specification.find_all{|s| s.name == name }
+        out << "#{name} (#{specs.map(&:version).join(',')})\n" unless specs.empty?
+      end
+
+      out << "\nBundler settings\n" unless Bundler.settings.all.empty?
+      Bundler.settings.all.each do |setting|
+        out << "  #{setting}\n"
+        Bundler.settings.pretty_values_for(setting).each do |line|
+          out << "    " << line << "\n"
+        end
+      end
+
+      out << "\n\n" << "Gemfile\n"
+      out << read_file("Gemfile") << "\n"
+
+      out << "\n\n" << "Gemfile.lock\n"
+      out << read_file("Gemfile.lock") << "\n"
+
+      out
+    end
+
+  private
+
+    def read_file(filename)
+      File.read(filename).strip
+    rescue Errno::ENOENT
+      "<No #{filename} found>"
+    rescue => e
+      "#{e.class}: #{e.message}"
+    end
+
+  end
+end
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