Def: Initial support for user-supplied package.

godef does an extremely fast and accurate job of locating identifiers, so we'll let godef have have the first attempt. If godef can't figure out what the user wants, we'll simply ask them for the package name.
Splits Def's implementation out of gomate.rb because we must use TextMate::UI which requires TM's builtin ruby18.

Author: syscrusher

Commands/Def.tmCommand

@@ -5,16 +5,54 @@
 	<key>beforeRunningCommand</key>
 	<string>nop</string>
 	<key>command</key>
-	<string>#!/usr/bin/env ruby
+	<string>#!/usr/bin/env ruby18
 
-require "#{ENV['TM_BUNDLE_SUPPORT']}/gomate"
-Go::godef</string>
+require ENV['TM_SUPPORT_PATH'] + '/lib/textmate'
+require ENV['TM_SUPPORT_PATH'] + '/lib/tm/process'
+require ENV['TM_SUPPORT_PATH'] + '/lib/tm/save_current_document'
+
+# TextMate's special TM_GODEF or expect 'godef' on PATH
+godef_cmd = ENV['TM_GODEF'] || 'godef'
+
+TextMate.save_if_untitled('go')
+
+# load current document from stdin
+document = []
+while line = $stdin.gets
+  document.push(line)
+end
+
+# byte offset of cursor position from the beginning of file
+cursor = document[ 0, ENV['TM_LINE_NUMBER'].to_i - 1].join().length + ENV['TM_LINE_INDEX'].to_i
+
+args = []
+args.push(godef_cmd)
+args.push('-f')
+args.push(ENV['TM_FILEPATH'])
+args.push('-o')
+args.push("#{cursor}")
+
+# /usr/local/Cellar/go/1.7.1/libexec/src/database/sql/sql.go:960:15
+out, err = TextMate::Process.run(*args)
+
+if err.nil? || err == ''
+  file_details = out.split(':')
+  TextMate.go_to(:file =&gt; file_details[0],
+                 :line =&gt; file_details[1],
+                 :column =&gt; file_details[2].to_i)
+elsif err.casecmp "godef: no identifier found";
+  require "#{ENV['TM_SUPPORT_PATH']}/lib/ui.rb"
+  package = TextMate::UI.request_string :title =&gt; "Open Package", :default =&gt; '', :prompt =&gt; "Which package do you wish to open?"
+  #TODO: Find and open package
+else
+  TextMate.exit_show_tool_tip(err)
+end</string>
 	<key>input</key>
 	<string>selection</string>
 	<key>inputFormat</key>
 	<string>text</string>
 	<key>keyEquivalent</key>
-	<string>@g</string>
+	<string>@D</string>
 	<key>name</key>
 	<string>Go to Definition</string>
 	<key>outputCaret</key>

Support/gomate.rb

@@ -92,41 +92,6 @@ def Go::gogetdoc
 
   end
 
-  def Go::godef
-    # TextMate's special TM_GODEF or expect 'godef' on PATH
-    godef_cmd = ENV['TM_GODEF'] || 'godef'
-
-    TextMate.save_if_untitled('go')
-
-    # load current document from stdin
-    document = []
-    while line = $stdin.gets
-      document.push(line)
-    end
-
-    # byte offset of cursor position from the beginning of file
-    cursor = document[ 0, ENV['TM_LINE_NUMBER'].to_i - 1].join().length + ENV['TM_LINE_INDEX'].to_i
-
-    args = []
-    args.push(godef_cmd)
-    args.push('-f')
-    args.push(ENV['TM_FILEPATH'])
-    args.push('-o')
-    args.push("#{cursor}")
-
-    # /usr/local/Cellar/go/1.7.1/libexec/src/database/sql/sql.go:960:15
-    out, err = TextMate::Process.run(*args)
-
-    if err.nil? || err == ''
-      file_details = out.split(':')
-      TextMate.go_to(:file => file_details[0],
-                     :line => file_details[1],
-                     :column => file_details[2].to_i)
-    else
-      TextMate.exit_show_tool_tip(err)
-    end
-  end
-
   def Go::golint
     golint = ENV['TM_GOLINT'] || 'golint'
     TextMate.save_if_untitled('go')