From: Joseph Turner via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Philip Kaludercic <philipk@posteo.net>
Cc: 66224@debbugs.gnu.org
Subject: bug#66224: [PATCH] Add optional PREDICATE argument to read-directory-name
Date: Thu, 28 Sep 2023 20:28:52 -0700 [thread overview]
Message-ID: <87edihy7tg.fsf@breatheoutbreathe.in> (raw)
In-Reply-To: <874jje1xds.fsf@posteo.net>
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Philip Kaludercic <philipk@posteo.net> writes:
>
> I am not sure this makes sense, #'file-directory-p is always non-nil but
> a PREDICATE will only be passed on to `read-file-name' is PREDICATE is
> also non-nil. So if no PREDICATE is passed, the expression ignored
> #'file-directory-p, breaking `read-directory-name', or am I mistaken (I
> haven't tried it out)?
Oops! Thanks for catching my error!! The attached patch should actually
do what I intended.
Joseph
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From 58f4215a6742c6cefc318f84544cc74495c901c1 Mon Sep 17 00:00:00 2001
From: Joseph Turner <joseph@breatheoutbreathe.in>
Date: Thu, 28 Sep 2023 20:27:47 -0700
Subject: [PATCH] Add optional PREDICATE argument to read-directory-name
* lisp/files.el (read-directory-name): Add optional PREDICATE arg.
* doc/lispref/minibuf.texi (Reading File Names): Document change.
* etc/NEWS: Note change.
---
doc/lispref/minibuf.texi | 7 +++++--
etc/NEWS | 5 +++++
lisp/files.el | 13 ++++++++++---
3 files changed, 20 insertions(+), 5 deletions(-)
diff --git a/doc/lispref/minibuf.texi b/doc/lispref/minibuf.texi
index 620c58ec6e9..bf4d6e13d3a 100644
--- a/doc/lispref/minibuf.texi
+++ b/doc/lispref/minibuf.texi
@@ -1709,7 +1709,7 @@ If this variable is non-@code{nil}, @code{read-file-name} ignores case
when performing completion.
@end defopt
-@defun read-directory-name prompt &optional directory default require-match initial
+@defun read-directory-name prompt &optional directory default require-match initial predicate
This function is like @code{read-file-name} but allows only directory
names as completion alternatives.
@@ -1719,7 +1719,10 @@ combining @var{directory} (or the current buffer's default directory
if @var{directory} is @code{nil}) and @var{initial}. If both
@var{default} and @var{initial} are @code{nil}, this function uses
@var{directory} as substitute default, or the current buffer's default
-directory if @var{directory} is @code{nil}.
+directory if @var{directory} is @code{nil}. When optional sixth
+argument @code{predicate} is non-nil, the union of @code{predicate}
+and @code{file-directory-p} is passed as the @code{predicate} argument
+to @code{read-file-name}.
@end defun
@defopt insert-default-directory
diff --git a/etc/NEWS b/etc/NEWS
index 1b3532b5657..fb9f6a0b43f 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -3541,6 +3541,11 @@ This function is called to see whether what the user has typed is a
match. This is also available from functions that call
'completing-read', like 'read-file-name'.
+** 'read-directory-name' now accepts an optional PREDICATE argument.
+When optional sixth argument PREDICATE is non-nil, the union of
+PREDICATE and 'file-directory-p' is passed as the PREDICATE argument
+to 'read-file-name'.
+
** 'posn-col-row' can now give position data based on windows.
Previously, it reported data only based on the frame.
diff --git a/lisp/files.el b/lisp/files.el
index b72f141c0ee..17f433fd339 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -807,7 +807,7 @@ See Info node `(elisp)Standard File Names' for more details."
(dos-convert-standard-filename filename))
(t filename)))
-(defun read-directory-name (prompt &optional dir default-dirname mustmatch initial)
+(defun read-directory-name (prompt &optional dir default-dirname mustmatch initial predicate)
"Read directory name, prompting with PROMPT and completing in directory DIR.
Value is not expanded---you must call `expand-file-name' yourself.
Default name to DEFAULT-DIRNAME if user exits with the same
@@ -821,14 +821,21 @@ Fourth arg MUSTMATCH non-nil means require existing directory's name.
Non-nil and non-t means also require confirmation after completion.
Fifth arg INITIAL specifies text to start with.
DIR should be an absolute directory name. It defaults to
-the value of `default-directory'."
+the value of `default-directory'.
+When sixth arg PREDICATE is non-nil, the union of PREDICATE and
+`file-directory-p' is passed as the PREDICATE argument to
+`read-file-name'. Otherwise, only `file-directory-p' is passed."
(unless dir
(setq dir default-directory))
(read-file-name prompt dir (or default-dirname
(if initial (expand-file-name initial dir)
dir))
mustmatch initial
- 'file-directory-p))
+ (lambda (filename)
+ (if predicate
+ (and (file-directory-p filename)
+ (funcall predicate filename))
+ (file-directory-p filename)))))
\f
(defun pwd (&optional insert)
--
2.41.0
next prev parent reply other threads:[~2023-09-29 3:28 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-27 1:16 bug#66224: [PATCH] Add optional PREDICATE argument to read-directory-name Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-28 9:05 ` Philip Kaludercic
2023-09-29 3:28 ` Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-29 3:54 ` Michael Heerdegen
2023-09-29 4:19 ` Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-10-03 3:30 ` Michael Heerdegen
2023-10-03 23:20 ` Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-10-05 1:23 ` Michael Heerdegen
2023-10-05 1:34 ` Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-11-12 20:42 ` Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-01-13 10:53 ` Stefan Kangas
2024-01-13 19:26 ` Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-29 3:28 ` Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2023-09-29 12:05 ` Eli Zaretskii
2023-10-03 23:08 ` Joseph Turner via Bug reports for GNU Emacs, the Swiss army knife of text editors
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