From f0067363fdc4617ed64c2a7f666d8778c294ff44 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9mi=20Vanicat?= <vanicat@debian.org>
Date: Mon, 11 Jul 2016 15:29:45 +0200
Subject: Use DEB_VERSION_UPSTREAM as elpa version.

---
 dh-elpa.el | 45 +++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 43 insertions(+), 2 deletions(-)

(limited to 'dh-elpa.el')

diff --git a/dh-elpa.el b/dh-elpa.el
index d76830b..31244ef 100644
--- a/dh-elpa.el
+++ b/dh-elpa.el
@@ -60,6 +60,47 @@ current time is used."
 		   #'dhelpa-autoload-insert-section-header)
     pkg-dir))
 
+;; Originally package-buffer-info from package.el in Emacs 24.5.1
+(defun dhelpa-buffer-info ()
+  "Return a `package-desc' describing the package in the current buffer.
+
+If the buffer does not contain a conforming package, signal an
+error.  If there is a package, narrow the buffer to the file's
+boundaries.
+
+If there is no version information, use DEB_VERSION_UPSTREAM"
+  (goto-char (point-min))
+  (unless (re-search-forward "^;;; \\([^ ]*\\)\\.el ---[ \t]*\\(.*?\\)[ \t]*\\(-\\*-.*-\\*-[ \t]*\\)?$" nil t)
+    (error "Package lacks a file header"))
+  (let ((file-name (match-string-no-properties 1))
+	(desc      (match-string-no-properties 2))
+	(start     (line-beginning-position)))
+    (unless (search-forward (concat ";;; " file-name ".el ends here"))
+      (error "Package lacks a terminating comment"))
+    ;; Try to include a trailing newline.
+    (forward-line)
+    (narrow-to-region start (point))
+    (require 'lisp-mnt)
+    ;; Use some headers we've invented to drive the process.
+    (let* ((requires-str (lm-header "package-requires"))
+	   ;; Prefer Package-Version; if defined, the package author
+	   ;; probably wants us to use it.  Otherwise try Version.
+	   (pkg-version
+	    (or (package-strip-rcs-id (lm-header "package-version"))
+		(package-strip-rcs-id (lm-header "version"))
+                (getenv "DEB_VERSION_UPSTREAM")))
+           (homepage (lm-homepage)))
+      (unless pkg-version
+	(error
+	 "Package lacks a \"Version\" or \"Package-Version\" header"))
+      (package-desc-from-define
+       file-name pkg-version desc
+       (if requires-str
+           (package--prepare-dependencies
+            (package-read-from-string requires-str)))
+       :kind 'single
+       :url homepage))))
+
 (defun dhelpa-filter-deps-for-debian (deps)
   "Filter a list of package.el deps DEPS for Debian.
 
@@ -109,7 +150,7 @@ autoload files."
   (interactive "D")
   (let ((pkg-desc (if (derived-mode-p 'tar-mode)
                       (package-tar-file-info)
-                    (package-buffer-info))))
+                    (dhelpa-buffer-info))))
     (dhelpa-unpack pkg-desc destdir epoch-time)
     pkg-desc))
 
@@ -177,7 +218,7 @@ specifies time to use in generated autoloads files."
           (condition-case nil
               (with-temp-buffer
                 (find-file root-file)
-                (package-buffer-info))
+                (dhelpa-buffer-info))
             (error (progn
                      (message "dh_elpa: couldn't generate -pkg file; please write one")
                      (kill-emacs -1)))))
-- 
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