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+;;; use-package-jump.el --- Attempt to jump to a use-package declaration  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2012-2017 John Wiegley
+
+;; Author: John Wiegley <johnw@newartisans.com>
+;; Maintainer: John Wiegley <johnw@newartisans.com>
+;; Created: 17 Jun 2012
+;; Modified: 3 Dec 2017
+;; Version: 1.0
+;; Package-Requires: ((emacs "24.3") (use-package "2.4"))
+;; Keywords: dotemacs startup speed config package
+;; URL: https://github.com/jwiegley/use-package
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License as
+;; published by the Free Software Foundation; either version 3, or (at
+;; your option) any later version.
+
+;; This program is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; Provides the command `M-x use-package-jump-to-package-form', however it
+;; only works if the package being jumped to was required during
+;; initialization. If it was delay-loaded, it will not work. Improvements are
+;; needed.
+
+;;; Code:
+
+(require 'use-package-core)
+
+(defun use-package-find-require (package)
+  "Find file that required PACKAGE by searching `load-history'.
+Returns an absolute file path or nil if none is found."
+  (catch 'suspect
+    (dolist (filespec load-history)
+      (dolist (entry (cdr filespec))
+        (when (equal entry (cons 'require package))
+          (throw 'suspect (car filespec)))))))
+
+;;;###autoload
+(defun use-package-jump-to-package-form (package)
+  "Attempt to find and jump to the `use-package' form that loaded
+PACKAGE. This will only find the form if that form actually
+required PACKAGE. If PACKAGE was previously required then this
+function will jump to the file that originally required PACKAGE
+instead."
+  (interactive (list (completing-read "Package: " features)))
+  (let* ((package (if (stringp package) (intern package) package))
+         (requiring-file (use-package-find-require package))
+         file location)
+    (if (null requiring-file)
+        (user-error "Can't find file requiring file; may have been autoloaded")
+      (setq file (if (string= (file-name-extension requiring-file) "elc")
+                     (concat (file-name-sans-extension requiring-file) ".el")
+                   requiring-file))
+      (when (file-exists-p file)
+        (find-file-other-window file)
+        (save-excursion
+          (goto-char (point-min))
+          (setq location
+                (re-search-forward
+                 (format (eval use-package-form-regexp-eval) package) nil t)))
+        (if (null location)
+            (message "No use-package form found.")
+          (goto-char location)
+          (beginning-of-line))))))
+
+(provide 'use-package-jump)
+
+;;; use-package-jump.el ends here