diff options
Diffstat (limited to 'lisp/vc.el')
| -rw-r--r-- | lisp/vc.el | 56 |
1 files changed, 27 insertions, 29 deletions
diff --git a/lisp/vc.el b/lisp/vc.el index a0db56ce6d7..0cf800c2ddd 100644 --- a/lisp/vc.el +++ b/lisp/vc.el @@ -1873,24 +1873,17 @@ The meaning of REV1 and REV2 is the same as for `vc-revision-diff'." (make-obsolete 'vc-diff-switches-list 'vc-switches "22.1") (defun vc-diff-sentinel (verbose rev1-name rev2-name) - ;; Did changes get generated into the buffer? - (if (not (zerop (buffer-size (get-buffer "*vc-diff*")))) - (progn - (pop-to-buffer "*vc-diff*") - ;; Gnus-5.8.5 sets up an autoload for diff-mode, even if it's - ;; not available. Work around that. - (if (require 'diff-mode nil t) (diff-mode)) - (when verbose - (let (buffer-read-only) - (goto-char (point-max)) - (insert (format "\n\nDiffs between %s and %s end here." rev1-name rev2-name)) - (goto-char (point-min)) - (insert (format "Diffs between %s and %s:\n\n" rev1-name rev2-name)))) - (shrink-window-if-larger-than-buffer) - t) - (progn - (message "No changes between %s and %s" rev1-name rev2-name) - nil))) + ;; The empty sync output case has already been handled, so the only + ;; possibility of an empty output is for an async process, in which case + ;; it's important to insert the "diffs end here" message in the buffer + ;; since the user may miss a message in the echo area. + (when verbose + (let ((inhibit-read-only t)) + (if (eq (buffer-size) 0) + (insert "No differences found.\n") + (insert (format "\n\nDiffs between %s and %s end here." rev1-name rev2-name))))) + (goto-char (point-min)) + (shrink-window-if-larger-than-buffer)) (defun vc-diff-internal (backend async files rev1 rev2 &optional verbose) "Report diffs between two revisions of a fileset. @@ -1927,12 +1920,20 @@ returns t if the buffer had changes, nil otherwise." (let ((vc-disable-async-diff (not async))) (vc-call-backend backend 'diff filtered rev1 rev2 "*vc-diff*"))) (set-buffer "*vc-diff*") - ;; This odd-looking code is because in the non-async case we - ;; actually want to pass the return value from vc-diff-sentinel - ;; back to the caller. - (if async - (vc-exec-after `(vc-diff-sentinel ,verbose ,rev1-name ,rev2-name)) - (vc-diff-sentinel verbose rev1-name rev2-name)))) + (if (and (zerop (buffer-size)) + (not (get-buffer-process (current-buffer)))) + ;; Treat this case specially so as not to pop the buffer. + (progn + (message "No changes between %s and %s" rev1-name rev2-name) + nil) + (pop-to-buffer (current-buffer)) + ;; Gnus-5.8.5 sets up an autoload for diff-mode, even if it's + ;; not available. Work around that. + (if (require 'diff-mode nil t) (diff-mode)) + (vc-exec-after `(vc-diff-sentinel ,verbose ,rev1-name ,rev2-name)) + ;; In the async case, we return t even if there are no differences + ;; because we don't know that yet. + t))) ;;;###autoload (defun vc-history-diff (backend files rev1 rev2) @@ -3031,10 +3032,7 @@ to provide the `find-revision' operation instead." (vc-register))) (defalias 'vc-default-logentry-check 'ignore) - -(defun vc-default-check-headers (backend) - "Default implementation of check-headers; always returns nil." - nil) +(defalias 'vc-default-check-headers 'ignore) (defun vc-default-log-view-mode (backend) (log-view-mode)) @@ -3116,7 +3114,7 @@ to provide the `find-revision' operation instead." (and (not vc-make-backup-files) (delete-file backup-name)))))) (message "Checking out %s...done" file)))) -(defun vc-default-revision-completion-table (backend file) nil) +(defalias 'vc-default-revision-completion-table 'ignore) (defun vc-check-headers () "Check if the current file has any headers in it." |