* [patch] get modification-time from vc
@ 2016-04-28 15:43 Rasmus
2016-04-30 21:43 ` Nicolas Goaziou
0 siblings, 1 reply; 6+ messages in thread
From: Rasmus @ 2016-04-28 15:43 UTC (permalink / raw)
To: emacs-orgmode
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Hi,
The file system modification time as accessed by {{{modification-time}}}
is often wrong, e.g. when a project is newly cloned or if the file has
been copied in a sloppy manner. At least if modification time suggest the
time that the file was edited by an author.
Sometimes vc can provide a better answer. The attached patch tries to get
a sensible time from vc.
Caveats:
- There’s no customization. I think that’s fine. If someone feels
strongly against this behavior a defcustom could be added or we could
add another a macro, {{{vc-modification-time}}}.
- org-macs will depend on vc. I don’t really see why this would be an
issue as vc is bundled with Emacs.
I have only tested this with git, but it should work with other vc
backends to the extend that ‘parse-time-string’ can handle the way they
format dates.
WDYT?
Rasmus
--
Even a three-legged dog has three good legs to lose
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From a3298310fe5f399dacd5ab13b725a95d9c626a21 Mon Sep 17 00:00:00 2001
From: Rasmus <rasmus@gmx.us>
Date: Thu, 28 Apr 2016 17:15:29 +0200
Subject: [PATCH 1/3] org-macro: Maybe get modification-time from vc.el
* org-macro.el (org-macro-initialize-templates): Check modification-time
in version control via vc.
* doc/org.texi (Macro replacement): Document new behavior.
* etc/ORG-NEWS: Mention new behavior.
---
doc/org.texi | 6 +++---
etc/ORG-NEWS | 4 +++-
lisp/org-macro.el | 27 ++++++++++++++++++++++++++-
3 files changed, 32 insertions(+), 5 deletions(-)
diff --git a/doc/org.texi b/doc/org.texi
index 17b01c2..bc08277 100644
--- a/doc/org.texi
+++ b/doc/org.texi
@@ -10251,9 +10251,9 @@ understood by @code{format-time-string}.
@cindex time, macro
@cindex modification time, macro
These macros refer to the date and time when the document is exported and to
-the modification date and time of the file being exported, respectively.
-@var{FORMAT} should be a format string understood by
-@code{format-time-string}.
+the modification date, potentially found via version control, and time of the
+file being exported, respectively. @var{FORMAT} should be a format string
+understood by @code{format-time-string}.
@item @{@{@{input-file@}@}@}
@cindex input file, macro
diff --git a/etc/ORG-NEWS b/etc/ORG-NEWS
index 99241e2..c8b1627 100644
--- a/etc/ORG-NEWS
+++ b/etc/ORG-NEWS
@@ -104,7 +104,9 @@ is straightforward. For example
becomes
: ("pdf" . (lambda (file link) (foo)))
-
+*** ~{{{modification-time}}}~ tries to obtain time via =vc=
+As a fallback, the modification time will be found via the file
+system.
** New features
*** New org-protocol key=value syntax
diff --git a/lisp/org-macro.el b/lisp/org-macro.el
index 5e9be98..debe6b0 100644
--- a/lisp/org-macro.el
+++ b/lisp/org-macro.el
@@ -59,6 +59,9 @@
(declare-function org-mode "org" ())
(declare-function org-remove-double-quotes "org" (s))
(declare-function org-with-wide-buffer "org-macs" (&rest body))
+(declare-function vc-backend "vc-hooks" (f))
+(declare-function vc-call "vc-hooks" (&rest args))
+(declare-function vc-exec-after "vc-dispatcher" (code))
;;; Variables
@@ -148,7 +151,29 @@ function installs the following ones: \"property\",
(cons "modification-time"
(format "(eval (format-time-string \"$1\" '%s))"
(prin1-to-string
- (nth 5 (file-attributes visited-file)))))))))
+ (or
+ ;; First, check if file has a VC modification time.
+ (save-window-excursion
+ (when (vc-backend visited-file)
+ (let ((buf (get-buffer-create " *org-vc*"))
+ date)
+ (vc-call print-log visited-file buf nil nil 1)
+ (with-current-buffer buf
+ (vc-exec-after
+ (lambda ()
+ (goto-char (point-min))
+ (when (search-forward-regexp "Date:?[ \t]*" nil t)
+ (let ((time (parse-time-string
+ (buffer-substring
+ (point) (point-at-eol)))))
+ (when (org-some 'identity time)
+ (setq date (apply 'encode-time time))))))))
+ (let ((proc (get-buffer-process buf)))
+ (while (and proc (accept-process-output proc .5 nil t))))
+ (kill-buffer " *org-vc*")
+ date)))
+ ;; Otherwise use the time registered by the file system.
+ (nth 5 (file-attributes visited-file))))))))))
(setq org-macro-templates templates)))
(defun org-macro-expand (macro templates)
--
2.8.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [patch] get modification-time from vc
2016-04-28 15:43 [patch] get modification-time from vc Rasmus
@ 2016-04-30 21:43 ` Nicolas Goaziou
2016-05-18 10:12 ` Rasmus
0 siblings, 1 reply; 6+ messages in thread
From: Nicolas Goaziou @ 2016-04-30 21:43 UTC (permalink / raw)
To: Rasmus; +Cc: emacs-orgmode
Hello,
Rasmus <rasmus@gmx.us> writes:
> The file system modification time as accessed by {{{modification-time}}}
> is often wrong, e.g. when a project is newly cloned or if the file has
> been copied in a sloppy manner. At least if modification time suggest the
> time that the file was edited by an author.
>
> Sometimes vc can provide a better answer. The attached patch tries to get
> a sensible time from vc.
Thank you for the patch.
> WDYT?
Well, if you ask, I do not like much when some software tries to
outsmart me (note that I like it even less when it actually succeeds).
So, I think {{{modification-time}}} should expand to modification time.
If you think that is useful, then I vote for a different macro.
Usual nitpicking follows.
> + (when (search-forward-regexp "Date:?[ \t]*" nil t)
Any reason not to use the genuine `re-search-forward'?
Is the search case sensitive? I suggest to bind appropriately
`case-fold-search' in any case.
> + (let ((time (parse-time-string
> + (buffer-substring
> + (point) (point-at-eol)))))
Any reason not to use the genuine `line-end-position'?
> + (when (org-some 'identity time)
(cl-some #'identity time)
> + (setq date (apply 'encode-time time))))))))
(setq date (apply #'encode-time time))
> + (let ((proc (get-buffer-process buf)))
> + (while (and proc (accept-process-output proc .5 nil t))))
> + (kill-buffer " *org-vc*")
(kill-buffer buf)
However, I suggest to use `unwind-protect' for this and kill-buffer
during as an unwind form.
Also, I suggest to factor this code out of
`org-macro-initialize-templates'.
Regards,
--
Nicolas Goaziou
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [patch] get modification-time from vc
2016-04-30 21:43 ` Nicolas Goaziou
@ 2016-05-18 10:12 ` Rasmus
2016-05-18 16:45 ` Nicolas Goaziou
0 siblings, 1 reply; 6+ messages in thread
From: Rasmus @ 2016-05-18 10:12 UTC (permalink / raw)
To: emacs-orgmode
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Hi,
An overdue "Thanks" for the feedback.
Here’s a new version.
Nicolas Goaziou <mail@nicolasgoaziou.fr> writes:
> Well, if you ask, I do not like much when some software tries to
> outsmart me (note that I like it even less when it actually succeeds).
> So, I think {{{modification-time}}} should expand to modification time.
New idea, an optional 2nd argument to modification-time. E.g.
{{{modification-time(%Y, vc)}}}
> If you think that is useful, then I vote for a different macro.
I prefer an argument as it gives a clear ranking: get the modified time
from vc, if possible (if the second argument is vc), otherwise get it from
the file system (also default behavior).
>> + (when (org-some 'identity time)
>
> (cl-some #'identity time)
Is cl-lib OK now?!
Thanks,
Rasmus
--
... The proofs are technical in nature and provide no real understanding
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From 20f2268c7555c08e26654c77c0191012e176e059 Mon Sep 17 00:00:00 2001
From: Rasmus <rasmus@gmx.us>
Date: Wed, 18 May 2016 11:23:46 +0200
Subject: [PATCH 1/3] org-macro.el: Allow modification-time from vc.el
* org-macro.el (org-macro--vc-modified-time): New function.
* org-macro.el (org-macro-initialize-templates): Add support for new
function.
* doc/org.texi (Macro replacement): Document new behavior.
* etc/ORG-NEWS: Mention new behavior.
---
doc/org.texi | 9 +++++----
etc/ORG-NEWS | 3 +++
lisp/org-macro.el | 32 +++++++++++++++++++++++++++++++-
3 files changed, 39 insertions(+), 5 deletions(-)
diff --git a/doc/org.texi b/doc/org.texi
index 0bfee39..f0fd8bb 100644
--- a/doc/org.texi
+++ b/doc/org.texi
@@ -10247,13 +10247,14 @@ argument to the @code{@{@{@{date@}@}@}} macro that will be used only if
understood by @code{format-time-string}.
@item @{@{@{time(@var{FORMAT})@}@}@}
-@itemx @{@{@{modification-time(@var{FORMAT})@}@}@}
+@itemx @{@{@{modification-time(@var{FORMAT}, @var{VC})@}@}@}
@cindex time, macro
@cindex modification time, macro
These macros refer to the date and time when the document is exported and to
-the modification date and time of the file being exported, respectively.
-@var{FORMAT} should be a format string understood by
-@code{format-time-string}.
+the modification date and time, respectively. @var{FORMAT} should be a
+format string understood by @code{format-time-string}. If the second
+argument to the @code{modification-time} macro is @samp{vc}, Org will try to
+find the modification time via version control (using @code{vc.el}).
@item @{@{@{input-file@}@}@}
@cindex input file, macro
diff --git a/etc/ORG-NEWS b/etc/ORG-NEWS
index 7a0a890..370963e 100644
--- a/etc/ORG-NEWS
+++ b/etc/ORG-NEWS
@@ -105,6 +105,9 @@ becomes
: ("pdf" . (lambda (file link) (foo)))
+*** The ~{{{modification-time}}}~ macro can obtain time via =vc=
+The modification time will be determined via =vc.el= if the second
+argument is =vc=. See the manual for details.
** New features
*** New org-protocol key=value syntax
diff --git a/lisp/org-macro.el b/lisp/org-macro.el
index e135374..d86aaee 100644
--- a/lisp/org-macro.el
+++ b/lisp/org-macro.el
@@ -58,6 +58,10 @@
(declare-function org-file-contents "org" (file &optional noerror))
(declare-function org-mode "org" ())
(declare-function org-remove-double-quotes "org" (s))
+(declare-function org-with-wide-buffer "org-macs" (&rest body))
+(declare-function vc-backend "vc-hooks" (f))
+(declare-function vc-call "vc-hooks" (&rest args))
+(declare-function vc-exec-after "vc-dispatcher" (code))
;;; Variables
@@ -145,11 +149,13 @@ function installs the following ones: \"property\",
(mapc update-templates
(list (cons "input-file" (file-name-nondirectory visited-file))
(cons "modification-time"
- (format "(eval (format-time-string \"$1\" '%s))"
+ (format "(eval (format-time-string \"$1\" (or (when (equal (org-trim (downcase \"$2\")) \"vc\") (org-macro--vc-modified-time %s)) '%s)))"
+ (prin1-to-string visited-file)
(prin1-to-string
(nth 5 (file-attributes visited-file)))))))))
(setq org-macro-templates templates)))
+
(defun org-macro-expand (macro templates)
"Return expanded MACRO, as a string.
MACRO is an object, obtained, for example, with
@@ -276,6 +282,30 @@ Return a list of arguments, as strings. This is the opposite of
s nil t)
"\000"))
+(defun org-macro--vc-modified-time (file)
+ (save-window-excursion
+ (when (vc-backend file)
+ (let ((buf (get-buffer-create " *org-vc*"))
+ (case-fold-search t)
+ date)
+ (unwind-protect
+ (progn
+ (vc-call print-log file buf nil nil 1)
+ (with-current-buffer buf
+ (vc-exec-after
+ (lambda ()
+ (goto-char (point-min))
+ (when (re-search-forward "Date:?[ \t]*" nil t)
+ (let ((time (parse-time-string
+ (buffer-substring
+ (point) (line-end-position)))))
+ (when (cl-some 'identity time)
+ (setq date (apply #'encode-time time))))))))
+ (let ((proc (get-buffer-process buf)))
+ (while (and proc (accept-process-output proc .5 nil t)))))
+ (kill-buffer buf))
+ date))))
+
(provide 'org-macro)
;;; org-macro.el ends here
--
2.8.2
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [patch] get modification-time from vc
2016-05-18 10:12 ` Rasmus
@ 2016-05-18 16:45 ` Nicolas Goaziou
2016-05-18 19:45 ` Rasmus
0 siblings, 1 reply; 6+ messages in thread
From: Nicolas Goaziou @ 2016-05-18 16:45 UTC (permalink / raw)
To: Rasmus; +Cc: emacs-orgmode
Hello,
Rasmus <rasmus@gmx.us> writes:
> Here’s a new version.
Thank you.
> New idea, an optional 2nd argument to modification-time. E.g.
>
> {{{modification-time(%Y, vc)}}}
Even better!
>> If you think that is useful, then I vote for a different macro.
>
> I prefer an argument as it gives a clear ranking: get the modified time
> from vc, if possible (if the second argument is vc), otherwise get it from
> the file system (also default behavior).
Why enforcing "vc" and not any non-nil/non-empty second argument instead ?
> Is cl-lib OK now?!
cl-lib is OK in master. Minimal requirement for master is Emacs 24.3.
> +the modification date and time, respectively. @var{FORMAT} should be a
> +format string understood by @code{format-time-string}. If the second
> +argument to the @code{modification-time} macro is @samp{vc}, Org will try to
> +find the modification time via version control (using @code{vc.el}).
Suggestion:
Org retrieves the information from the version control system (using
@file{vc.el}) instead of the file attributes.
> + (format "(eval (format-time-string \"$1\" (or (when (equal (org-trim (downcase \"$2\")) \"vc\") (org-macro--vc-modified-time %s)) '%s)))"
when => and
> + (when (cl-some 'identity time)
> + (setq date (apply #'encode-time time))))))))
Why #'encode-time and not #'identity ?
In any case, this looks good. Please push when you're happy with the
result.
Regards,
--
Nicolas Goaziou
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [patch] get modification-time from vc
2016-05-18 16:45 ` Nicolas Goaziou
@ 2016-05-18 19:45 ` Rasmus
2016-05-19 7:47 ` Nicolas Goaziou
0 siblings, 1 reply; 6+ messages in thread
From: Rasmus @ 2016-05-18 19:45 UTC (permalink / raw)
To: emacs-orgmode
Hi,
Thanks for the comments!
Nicolas Goaziou <mail@nicolasgoaziou.fr> writes:
> Why enforcing "vc" and not any non-nil/non-empty second argument instead ?
No point, really.
>> Is cl-lib OK now?!
>
> cl-lib is OK in master. Minimal requirement for master is Emacs 24.3.
Cool.
>> + (when (cl-some 'identity time)
>> + (setq date (apply #'encode-time time))))))))
>
> Why #'encode-time and not #'identity ?
To test if you review the all the way to the end! Or...
> In any case, this looks good. Please push when you're happy with the
> result.
Pushed.
Rasmus
--
And when I’m finished thinking, I have to die a lot
^ permalink raw reply [flat|nested] 6+ messages in thread
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2016-04-28 15:43 [patch] get modification-time from vc Rasmus
2016-04-30 21:43 ` Nicolas Goaziou
2016-05-18 10:12 ` Rasmus
2016-05-18 16:45 ` Nicolas Goaziou
2016-05-18 19:45 ` Rasmus
2016-05-19 7:47 ` Nicolas Goaziou
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