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[Emacs-diffs] master f96fe57: New option to make 'C-x 4 a' use file-less
From: |
João Távora |
Subject: |
[Emacs-diffs] master f96fe57: New option to make 'C-x 4 a' use file-less ChangeLog buffers |
Date: |
Sat, 21 Jul 2018 11:03:04 -0400 (EDT) |
branch: master
commit f96fe57fb76df8e7282f266d42a0d471780e1d75
Author: João Távora <address@hidden>
Commit: João Távora <address@hidden>
New option to make 'C-x 4 a' use file-less ChangeLog buffers
* doc/emacs/maintaining.texi (Change Log Commands): Document
add-log-dont-create-changelog-file.
* etc/NEWS (Change Logs Mode): Mention
add-log-dont-create-changelog-file.
* lisp/vc/add-log.el (add-log-file-name): Add comment.
(add-log-dont-create-changelog-file): New variable.
(add-log--pseudo-changelog-buffer-name)
(add-log--changelog-buffer-p): New helpers.
(add-log-find-changelog-buffer): New function.
(add-log--pseudo-changelog-buffer-name): Respect
add-log-dont-create-changelog-file.
* lisp/vc/log-edit.el (log-edit-changelog-entries): Use
add-log-find-changelog-buffer.
---
doc/emacs/maintaining.texi | 14 ++++--
etc/NEWS | 7 +++
lisp/vc/add-log.el | 113 ++++++++++++++++++++++++++++++++-------------
lisp/vc/log-edit.el | 6 ++-
4 files changed, 103 insertions(+), 37 deletions(-)
diff --git a/doc/emacs/maintaining.texi b/doc/emacs/maintaining.texi
index 024fd97..c59978e 100644
--- a/doc/emacs/maintaining.texi
+++ b/doc/emacs/maintaining.texi
@@ -1655,10 +1655,18 @@ not just to the next change log entry. You can also use
log files into a buffer in Change Log Mode, preserving the date
ordering of entries.
address@hidden add-log-dont-create-changelog-file
Version control systems are another way to keep track of changes in
-your program and keep a change log. In the VC log buffer, typing
address@hidden C-a} (@code{log-edit-insert-changelog}) inserts the relevant
-change log entry, if one exists. @xref{Log Buffer}.
+your program and keep a change log. In these situations, you may not
+want to keep a separate versioned change log file. If
address@hidden is address@hidden, commands
+like @kbd{C-x 4 a} (@code{add-change-log-entry-other-window}) will
+record changes in a suitably named temporary buffer instead of a file,
+unless such a file already exists.
+
+In either case, you can type @kbd{C-c C-a}
+(@code{log-edit-insert-changelog}) in the VC Log buffer to insert the
+relevant change log entries, if they exist. @xref{Log Buffer}.
@node Format of ChangeLog
@subsection Format of ChangeLog
diff --git a/etc/NEWS b/etc/NEWS
index 8275cbb..72e35f9 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -217,6 +217,13 @@ navigation and editing of large files.
* Changes in Specialized Modes and Packages in Emacs 27.1
+** Change Logs and VC
+
+*** Recording ChangeLog entries doesn't require an actual file
+An existing file will be used if it already exists. This is
+controlled by the defcustom 'add-log-dont-create-changelog-file',
+which defaults to t.
+
** diff-mode
*** Hunks are now automatically refined by default
To disable it, set the new defcustom 'diff-font-lock-refine' to nil.
diff --git a/lisp/vc/add-log.el b/lisp/vc/add-log.el
index 4d69aac..5ed43e8 100644
--- a/lisp/vc/add-log.el
+++ b/lisp/vc/add-log.el
@@ -744,6 +744,7 @@ Optional arg BUFFER-FILE overrides `buffer-file-name'."
file-name)
(defun add-log-file-name (buffer-file log-file)
+ "Compute file-name of BUFFER-FILE as displayed in LOG-FILE."
;; Never want to add a change log entry for the ChangeLog file itself.
(unless (or (null buffer-file) (string= buffer-file log-file))
(if add-log-file-name-function
@@ -767,36 +768,76 @@ Optional arg BUFFER-FILE overrides `buffer-file-name'."
(file-name-sans-versions buffer-file)
buffer-file))))
-;;;###autoload
-(defun add-change-log-entry (&optional whoami file-name other-window new-entry
- put-new-entry-on-new-line)
- "Find change log file, and add an entry for today and an item for this file.
-Optional arg WHOAMI (interactive prefix) non-nil means prompt for user
-name and email (stored in `add-log-full-name' and `add-log-mailing-address').
-
-Second arg FILE-NAME is file name of the change log.
-If nil, use the value of `change-log-default-name'.
-
-Third arg OTHER-WINDOW non-nil means visit in other window.
+(defcustom add-log-dont-create-changelog-file t
+ "If non-nil, don't create ChangeLog files for log entries.
+This applies only if no pre-existing ChangeLog is found."
+ :type :boolean
+ :version "27.1")
-Fourth arg NEW-ENTRY non-nil means always create a new entry at the front;
-never append to an existing entry. Option `add-log-keep-changes-together'
-otherwise affects whether a new entry is created.
+(put 'add-log-dont-create-changelog-file 'safe-local-variable 'booleanp)
-Fifth arg PUT-NEW-ENTRY-ON-NEW-LINE non-nil means that if a new
-entry is created, put it on a new line by itself, do not put it
-after a comma on an existing line.
+(defun add-log--pseudo-changelog-buffer-name (changelog-file-name)
+ "Compute suitable name for a non-file ChangeLog buffer.
+ CHANGELOG-FILE-NAME is the file name of the actual ChangeLog file
+ if it were to exist."
+ (format "*changes to %s*"
+ (abbreviate-file-name
+ (file-name-directory changelog-file-name))))
-Option `add-log-always-start-new-record' non-nil means always create a
-new record, even when the last record was made on the same date and by
-the same person.
-
-The change log file can start with a copyright notice and a copying
-permission notice. The first blank line indicates the end of these
-notices.
+(defun add-log--changelog-buffer-p (changelog-file-name buffer)
+ "Tell if BUFFER holds a ChangeLog for CHANGELOG-FILE-NAME."
+ (with-current-buffer buffer
+ (if buffer-file-name
+ (equal buffer-file-name changelog-file-name)
+ (equal (add-log--pseudo-changelog-buffer-name changelog-file-name)
+ (buffer-name)))))
+
+(defun add-log-find-changelog-buffer (changelog-file-name)
+ "Find a ChangeLog buffer for CHANGELOG-FILE-NAME.
+ Respect `add-log-use-pseudo-changelog', which see."
+ (if (or (file-exists-p changelog-file-name)
+ (not add-log-dont-create-changelog-file))
+ (find-file-noselect changelog-file-name)
+ (get-buffer-create
+ (add-log--pseudo-changelog-buffer-name changelog-file-name))))
-Today's date is calculated according to `add-log-time-zone-rule' if
-non-nil, otherwise in local time."
+;;;###autoload
+(defun add-change-log-entry (&optional whoami
+ changelog-file-name
+ other-window new-entry
+ put-new-entry-on-new-line)
+ "Find ChangeLog buffer, add an entry for today and an item for this file.
+ Optional arg WHOAMI (interactive prefix) non-nil means prompt for
+ user name and email (stored in `add-log-full-name' and
+ `add-log-mailing-address').
+
+ Second arg CHANGELOG-FILE-NAME is file name of the change log.
+ If nil, use the value of `change-log-default-name'. If the file
+ thus named exists, it's used for the new entry. If it doesn't
+ exist, it is created, unless `add-log-dont-create-changelog-file' is t,
+ in which case a suitably named file-less buffer is used for
+ keeping entries pertaining to CHANGELOG-FILE-NAME's directory.
+
+ Third arg OTHER-WINDOW non-nil means visit in other window.
+
+ Fourth arg NEW-ENTRY non-nil means always create a new entry at the front;
+ never append to an existing entry. Option `add-log-keep-changes-together'
+ otherwise affects whether a new entry is created.
+
+ Fifth arg PUT-NEW-ENTRY-ON-NEW-LINE non-nil means that if a new
+ entry is created, put it on a new line by itself, do not put it
+ after a comma on an existing line.
+
+ Option `add-log-always-start-new-record' non-nil means always create a
+ new record, even when the last record was made on the same date and by
+ the same person.
+
+ The change log file can start with a copyright notice and a copying
+ permission notice. The first blank line indicates the end of these
+ notices.
+
+ Today's date is calculated according to `add-log-time-zone-rule' if
+ non-nil, otherwise in local time."
(interactive (list current-prefix-arg
(prompt-for-change-log-name)))
(let* ((defun (add-log-current-defun))
@@ -804,20 +845,28 @@ non-nil, otherwise in local time."
(change-log-version-number-search)))
(buf-file-name (funcall add-log-buffer-file-name-function))
(buffer-file (if buf-file-name (expand-file-name buf-file-name)))
- (file-name (expand-file-name (find-change-log file-name buffer-file)))
+ (changelog-file-name (expand-file-name (find-change-log
+ changelog-file-name
+ buffer-file)))
;; Set ITEM to the file name to use in the new item.
- (item (add-log-file-name buffer-file file-name)))
+ (item (add-log-file-name buffer-file changelog-file-name)))
- (unless (equal file-name buffer-file-name)
+ ;; don't add entries from the ChangeLog file/buffer to itself.
+ (unless (equal changelog-file-name buffer-file-name)
(cond
- ((equal file-name (buffer-file-name (window-buffer)))
+ ((add-log--changelog-buffer-p
+ changelog-file-name
+ (window-buffer))
;; If the selected window already shows the desired buffer don't show
;; it again (particularly important if other-window is true).
;; This is important for diff-add-change-log-entries-other-window.
(set-buffer (window-buffer)))
((or other-window (window-dedicated-p))
- (find-file-other-window file-name))
- (t (find-file file-name))))
+ (switch-to-buffer-other-window
+ (add-log-find-changelog-buffer changelog-file-name)))
+ (t
+ (switch-to-buffer
+ (add-log-find-changelog-buffer changelog-file-name)))))
(or (derived-mode-p 'change-log-mode)
(change-log-mode))
(undo-boundary)
diff --git a/lisp/vc/log-edit.el b/lisp/vc/log-edit.el
index 6ff782a..90860fb 100644
--- a/lisp/vc/log-edit.el
+++ b/lisp/vc/log-edit.el
@@ -913,8 +913,10 @@ where LOGBUFFER is the name of the ChangeLog buffer, and
each
(setq change-log-default-name nil)
(find-change-log)))))
(when (or (find-buffer-visiting changelog-file-name)
- (file-exists-p changelog-file-name))
- (with-current-buffer (find-file-noselect changelog-file-name)
+ (file-exists-p changelog-file-name)
+ add-log-dont-create-changelog-file)
+ (with-current-buffer
+ (add-log-find-changelog-buffer changelog-file-name)
(unless (eq major-mode 'change-log-mode) (change-log-mode))
(goto-char (point-min))
(if (looking-at "\\s-*\n") (goto-char (match-end 0)))
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