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From: Aleksandr Vityazev 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: Eli Zaretskii <eliz@gnu.org>, 73357@debbugs.gnu.org
Subject: bug#73357: [PATCH] Make vc-clone interactive
Date: Sun, 29 Sep 2024 21:23:13 +0300	[thread overview]
Message-ID: <871q12fhf2.fsf@disroot.org> (raw)
In-Reply-To: <87ed59tkpk.fsf@posteo.net> (Philip Kaludercic's message of "Tue,  24 Sep 2024 10:22:31 +0000")

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On 2024-09-24 10:22, Philip Kaludercic wrote:

> Aleksandr Vityazev <avityazev@disroot.org> writes:
>
>> On 2024-09-19 16:36, Eli Zaretskii wrote:
>>
>>>> Date: Thu, 19 Sep 2024 16:18:16 +0300
>>>> From:  Aleksandr Vityazev via "Bug reports for GNU Emacs,
>>>>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>>>> 
>>>> Cloning is used quite often, so I would like to have an interactive
>>>> command. A patch is attached to the email. WDYT?
>>>
>>> Thanks, but making this function a command will take more than just
>>> adding the interactive form.  I think we need at least:
>>>
>>>   . mention that in interactive usage the command prompts for the
>>>     argument (why do we have to prompt for REV, btw?)
>>
>> I clarified in the docstring. We can agree that we shouldn't prompt for REV
>> when cloning interactively, removed.
>>
>>>   . announce the change in NEWS
>> Announced but did not mark the news with +++ or ---.
>>>   . maybe update the user manual
>> maybe if I have to, I'll do it.
>>>   . maybe make the command fall back to 'checkout' method if 'clone'
>>>     is not supported
>>
>> it's worth thinking about, because I can't say for sure right now if
>> it's worth it. And how to do this when vc-checkout requires a file as an
>> argument.
>>
>>>> +    (when (file-directory-p directory)
>>>> +      (if (called-interactively-p 'interactive)
>>>> +          (find-file directory)
>>>> +        directory))))
>>>
>>> This changes the value returned by the function from what it did
>>> before, no?
>>
>> If the function is called from the code, it returns nil or the
>> directory, just like in the previous version. Or am I missing
>> something?
>>
>> V2 patch:
>>
>>>From b302b5c42e01fe0b6f7607128ed660babf55e35a Mon Sep 17 00:00:00 2001
>> Message-ID: <b302b5c42e01fe0b6f7607128ed660babf55e35a.1726762586.git.avityazev@disroot.org>
>> From: Aleksandr Vityazev <avityazev@disroot.org>
>> Date: Thu, 19 Sep 2024 16:11:31 +0300
>> Subject: [PATCH] Make vc-clone interactive
>>
>> * lisp/vc/vc.el (vc-clone): Make interactive.
>> Mention this in the doc string.
>> (vc--remotes-history): New defvar.
>> * etc/NEWS: Announce it.
>> ---
>>  etc/NEWS      |  7 +++++++
>>  lisp/vc/vc.el | 42 ++++++++++++++++++++++++++++--------------
>>  2 files changed, 35 insertions(+), 14 deletions(-)
>>
>> diff --git a/etc/NEWS b/etc/NEWS
>> index b52ad001a2e..db5f05c823c 100644
>> --- a/etc/NEWS
>> +++ b/etc/NEWS
>> @@ -359,6 +359,13 @@ functionality of the standard 'xref' commands in TeX buffers.  You can
>>  restore the standard 'etags' backend with the 'M-x xref-etags-mode'
>>  toggle.
>>  
>> +** VC
>> +
>> +*** 'vc-clone' is now an interactive command.
>> +When called interactively, 'vc-clone' now prompts for the address of the
>> +remote repository, the backend that will be used for cloning, as well as
>> +the directory where the repository will be cloned.
>
> Try to avoid passive voice, as in "be used" and "be cloned".

Fixed.

>
>> +
>>  \f
>>  * New Modes and Packages in Emacs 31.1
>>  
>> diff --git a/lisp/vc/vc.el b/lisp/vc/vc.el
>> index 597a1622f5a..fc964803a02 100644
>> --- a/lisp/vc/vc.el
>> +++ b/lisp/vc/vc.el
>> @@ -3804,6 +3804,8 @@ vc-check-headers
>>    (interactive)
>>    (vc-call-backend (vc-backend buffer-file-name) 'check-headers))
>>  
>> +(defvar vc--remotes-history)
>> +
>>  (defun vc-clone (remote &optional backend directory rev)
>>    "Clone repository REMOTE using version-control BACKEND, into DIRECTORY.
>>  If successful, return the string with the directory of the checkout;
>> @@ -3814,20 +3816,32 @@ vc-clone
>>  If BACKEND is nil or omitted, the function iterates through every known
>>  backend in `vc-handled-backends' until one succeeds to clone REMOTE.
>>  If REV is non-nil, it indicates a specific revision to check out after
>> -cloning; the syntax of REV depends on what BACKEND accepts."
>> -  (setq directory (expand-file-name (or directory default-directory)))
>> -  (if backend
>> -      (progn
>> -        (unless (memq backend vc-handled-backends)
>> -          (error "Unknown VC backend %s" backend))
>> -        (vc-call-backend backend 'clone remote directory rev))
>> -    (catch 'ok
>> -      (dolist (backend vc-handled-backends)
>> -        (ignore-error vc-not-supported
>> -          (when-let ((res (vc-call-backend
>> -                           backend 'clone
>> -                           remote directory rev)))
>> -            (throw 'ok res)))))))
>> +cloning; the syntax of REV depends on what BACKEND accepts.
>> +If called interactively, prompt for REMOTE, BACKEND and DIRECTORY in
>> +the minibuffer."
>> +  (interactive
>> +   (list (read-string "Remote: " nil 'vc--remotes-history)
>> +         (intern (completing-read "Backend: " vc-handled-backends nil t))
>
> We could consider moving `package-vc-heuristic-alist' to vc so as to
> provide some useful default when cloning.

make sense, moved package-vc-heuristic-alist, package-vc--backend-type
and package-vc--guess-backend into vc

>
>> +         (expand-file-name
>
> Here also, I think it would make sense to re-use the same interface as
> `package-vc-checkout' provides, by prompting for a not-yet existing
> directory.

I agree

>
>> +          (read-directory-name "Clone dir: "))))
>> +  (let ((directory (expand-file-name (or directory default-directory))))
>> +    (setq directory
>
> I think binding this in a `let*' expression would look nicer.

also agree

>
>> +          (if backend
>> +              (progn
>> +                (unless (memq backend vc-handled-backends)
>> +                  (error "Unknown VC backend %s" backend))
>> +                (vc-call-backend backend 'clone remote directory rev))
>> +            (catch 'ok
>> +              (dolist (backend vc-handled-backends)
>> +                (ignore-error vc-not-supported
>> +                  (when-let ((res (vc-call-backend
>> +                                   backend 'clone
>> +                                   remote directory rev)))
>> +                    (throw 'ok res)))))))
>> +    (when (file-directory-p directory)
>> +      (if (called-interactively-p 'interactive)
>
> Perhaps we can add a FIND-FILE argument to the end, so that it is also
> possible to open the directory from a script as well.

might be useful, added and documented in doc string.

>
>> +          (find-file directory)
>> +        directory))))
>
> I'd always return `directory', that seems simpler.

Simpler, but it seems logical to switch to a directory when using it
interactively. I left it as it was.

>
>>  
>>  (declare-function log-view-current-tag "log-view" (&optional pos))
>>  (defun vc-default-last-change (_backend file line)
>> -- 
>> 2.46.0

V3 patch: 

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From 6d5dbb1d1354d7476caaeeecfe15b8fd6335490a Mon Sep 17 00:00:00 2001
Message-ID: <6d5dbb1d1354d7476caaeeecfe15b8fd6335490a.1727634026.git.avityazev@disroot.org>
From: Aleksandr Vityazev <avityazev@disroot.org>
Date: Sun, 29 Sep 2024 21:13:28 +0300
Subject: [PATCH] Make vc-clone interactive

* lisp/vc/vc.el (vc-clone): Make interactive.  Add optional
argument FIND-FILE. Mention these changes in the doc string.
(vc--remotes-history): New defvar.
* lisp/emacs-lisp/package-vc (package-vc--backend-type,
package-vc-heuristic-alist, package-vc--guess-backend):
Rename and move to ...
(package-vc-default-backend): Set type to vc-backend-type.
(package-vc--clone, package-vc--read-package-name, package-vc-install,
package-vc-checkout): Use vc-guess-backend.
* lisp/vc/vc (vc-backend-type, vc-heuristic-alist, vc-guess-backend):
... here.
* etc/NEWS: Announce these changes.
---
 etc/NEWS                      |  12 ++++
 lisp/emacs-lisp/package-vc.el |  75 ++--------------------
 lisp/vc/vc.el                 | 115 +++++++++++++++++++++++++++++-----
 3 files changed, 118 insertions(+), 84 deletions(-)

diff --git a/etc/NEWS b/etc/NEWS
index aaf3783f006..3722e12c01d 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -444,6 +444,18 @@ toggle.
 Putting (require 'midnight) in your init file no longer activates the
 mode.  Now, one needs to say (midnight-mode +1) instead.
 
+** VC
+
+*** 'vc-clone' is now an interactive command.
+When called interactively, 'vc-clone' now prompts for the remote
+repository address, the backend for cloning, if it has not been
+determined automatically according to the URL, and the directory to
+clone the repository into.
+
+*** 'vc-clone' now accepts an optional argument FIND-FILE.
+When the argument is non-nil, the function switches to a buffer visiting
+directory to which the repository was cloned.
+
 \f
 * New Modes and Packages in Emacs 31.1
 
diff --git a/lisp/emacs-lisp/package-vc.el b/lisp/emacs-lisp/package-vc.el
index e168096e153..82b450368d0 100644
--- a/lisp/emacs-lisp/package-vc.el
+++ b/lisp/emacs-lisp/package-vc.el
@@ -63,62 +63,6 @@ package-vc
 (defconst package-vc--elpa-packages-version 1
   "Version number of the package specification format understood by package-vc.")
 
-(defconst package-vc--backend-type
-  `(choice :convert-widget
-           ,(lambda (widget)
-              (let (opts)
-                (dolist (be vc-handled-backends)
-                  (when (or (vc-find-backend-function be 'clone)
-                            (alist-get 'clone (get be 'vc-functions)))
-                    (push (widget-convert (list 'const be)) opts)))
-                (widget-put widget :args opts))
-              widget))
-  "The type of VC backends that support cloning package VCS repositories.")
-
-(defcustom package-vc-heuristic-alist
-  `((,(rx bos "http" (? "s") "://"
-          (or (: (? "www.") "github.com"
-                 "/" (+ (or alnum "-" "." "_"))
-                 "/" (+ (or alnum "-" "." "_")))
-              (: "codeberg.org"
-                 "/" (+ (or alnum "-" "." "_"))
-                 "/" (+ (or alnum "-" "." "_")))
-              (: (? "www.") "gitlab" (+ "." (+ alnum))
-                 "/" (+ (or alnum "-" "." "_"))
-                 "/" (+ (or alnum "-" "." "_")))
-              (: "git.sr.ht"
-                 "/~" (+ (or alnum "-" "." "_"))
-                 "/" (+ (or alnum "-" "." "_")))
-              (: "git." (or "savannah" "sv") "." (? "non") "gnu.org/"
-                 (or "r" "git") "/"
-                 (+ (or alnum "-" "." "_")) (? "/")))
-          (or (? "/") ".git") eos)
-     . Git)
-    (,(rx bos "http" (? "s") "://"
-          (or (: "hg.sr.ht"
-                 "/~" (+ (or alnum "-" "." "_"))
-                 "/" (+ (or alnum "-" "." "_")))
-              (: "hg." (or "savannah" "sv") "." (? "non") "gnu.org/hgweb/"
-                 (+ (or alnum "-" "." "_")) (? "/")))
-          eos)
-     . Hg)
-    (,(rx bos "http" (? "s") "://"
-          (or (: "bzr." (or "savannah" "sv") "." (? "non") "gnu.org/r/"
-                 (+ (or alnum "-" "." "_")) (? "/")))
-          eos)
-     . Bzr))
-  "Alist mapping repository URLs to VC backends.
-`package-vc-install' consults this alist to determine the VC
-backend from the repository URL when you call it without
-specifying a backend.  Each element of the alist has the form
-\(URL-REGEXP . BACKEND).  `package-vc-install' will use BACKEND of
-the first association for which the URL of the repository matches
-the URL-REGEXP of the association.  If no match is found,
-`package-vc-install' uses `package-vc-default-backend' instead."
-  :type `(alist :key-type (regexp :tag "Regular expression matching URLs")
-                :value-type ,package-vc--backend-type)
-  :version "29.1")
-
 (defcustom package-vc-default-backend 'Git
   "Default VC backend to use for cloning package repositories.
 `package-vc-install' uses this backend when you specify neither
@@ -127,7 +71,7 @@ package-vc-default-backend
 
 The value must be a member of `vc-handled-backends' that supports
 the `clone' VC function."
-  :type package-vc--backend-type
+  :type vc-backend-type
   :version "29.1")
 
 (defcustom package-vc-register-as-project t
@@ -626,13 +570,6 @@ package-vc--unpack-1
                  "")))
     t))
 
-(defun package-vc--guess-backend (url)
-  "Guess the VC backend for URL.
-This function will internally query `package-vc-heuristic-alist'
-and return nil if it cannot reasonably guess."
-  (and url (alist-get url package-vc-heuristic-alist
-                      nil nil #'string-match-p)))
-
 (declare-function project-remember-projects-under "project" (dir &optional recursive))
 
 (defun package-vc--clone (pkg-desc pkg-spec dir rev)
@@ -646,7 +583,7 @@ package-vc--clone
     (unless (file-exists-p dir)
       (make-directory (file-name-directory dir) t)
       (let ((backend (or (plist-get pkg-spec :vc-backend)
-                         (package-vc--guess-backend url)
+                         (vc-guess-backend url)
                          (plist-get (alist-get (package-desc-archive pkg-desc)
                                                package-vc--archive-data-alist
                                                nil nil #'string=)
@@ -753,7 +690,7 @@ package-vc--read-package-name
                            ;; pointing towards a repository, and use that as a backup
                            (and-let* ((extras (package-desc-extras (cadr pkg)))
                                       (url (alist-get :url extras))
-                                      ((package-vc--guess-backend url)))))))
+                                      ((vc-guess-backend url)))))))
                    (not allow-url)))
 
 (defun package-vc--read-package-desc (prompt &optional installed)
@@ -917,7 +854,7 @@ package-vc-install
      (cdr package)
      rev))
    ((and-let* (((stringp package))
-               (backend (or backend (package-vc--guess-backend package))))
+               (backend (or backend (vc-guess-backend package))))
       (package-vc--unpack
        (package-desc-create
         :name (or name (intern (file-name-base package)))
@@ -930,7 +867,7 @@ package-vc-install
        (or (package-vc--desc->spec (cadr desc))
            (and-let* ((extras (package-desc-extras (cadr desc)))
                       (url (alist-get :url extras))
-                      (backend (package-vc--guess-backend url)))
+                      (backend (vc-guess-backend url)))
              (list :vc-backend backend :url url))
            (user-error "Package `%s' has no VC data" package))
        rev)))
@@ -958,7 +895,7 @@ package-vc-checkout
   (let ((pkg-spec (or (package-vc--desc->spec pkg-desc)
                       (and-let* ((extras (package-desc-extras pkg-desc))
                                  (url (alist-get :url extras))
-                                 (backend (package-vc--guess-backend url)))
+                                 (backend (vc-guess-backend url)))
                         (list :vc-backend backend :url url))
                       (user-error "Package `%s' has no VC data"
                                   (package-desc-name pkg-desc)))))
diff --git a/lisp/vc/vc.el b/lisp/vc/vc.el
index 597a1622f5a..cd877bd8097 100644
--- a/lisp/vc/vc.el
+++ b/lisp/vc/vc.el
@@ -929,7 +929,69 @@ vc-find-revision-no-save
   :type 'boolean
   :version "27.1")
 
+(defconst vc-backend-type
+  `(choice :convert-widget
+     ,(lambda (widget)
+        (let (opts)
+          (dolist (be vc-handled-backends)
+            (when (or (vc-find-backend-function be 'clone)
+                      (alist-get 'clone (get be 'vc-functions)))
+              (push (widget-convert (list 'const be)) opts)))
+          (widget-put widget :args opts))
+        widget))
+  "The type of VC backends that support cloning VCS repositories.")
+
+(defcustom vc-heuristic-alist
+  `((,(rx bos "http" (? "s") "://"
+          (or (: (? "www.") "github.com"
+               "/" (+ (or alnum "-" "." "_"))
+               "/" (+ (or alnum "-" "." "_")))
+              (: "codeberg.org"
+               "/" (+ (or alnum "-" "." "_"))
+               "/" (+ (or alnum "-" "." "_")))
+              (: (? "www.") "gitlab" (+ "." (+ alnum))
+               "/" (+ (or alnum "-" "." "_"))
+               "/" (+ (or alnum "-" "." "_")))
+              (: "git.sr.ht"
+               "/~" (+ (or alnum "-" "." "_"))
+               "/" (+ (or alnum "-" "." "_")))
+              (: "git." (or "savannah" "sv") "." (? "non") "gnu.org/"
+               (or "r" "git") "/"
+               (+ (or alnum "-" "." "_")) (? "/")))
+          (or (? "/") ".git") eos)
+     . Git)
+    (,(rx bos "http" (? "s") "://"
+          (or (: "hg.sr.ht"
+               "/~" (+ (or alnum "-" "." "_"))
+               "/" (+ (or alnum "-" "." "_")))
+              (: "hg." (or "savannah" "sv") "." (? "non") "gnu.org/hgweb/"
+               (+ (or alnum "-" "." "_")) (? "/")))
+          eos)
+     . Hg)
+    (,(rx bos "http" (? "s") "://"
+          (or (: "bzr." (or "savannah" "sv") "." (? "non") "gnu.org/r/"
+               (+ (or alnum "-" "." "_")) (? "/")))
+          eos)
+     . Bzr))
+  "Alist mapping repository URLs to VC backends.
+`vc-clone' consults this alist to determine the VC
+backend from the repository URL when you call it without
+specifying a backend.  Each element of the alist has the form
+\(URL-REGEXP . BACKEND).  `vc-clone' will use BACKEND of
+the first association for which the URL of the repository matches
+the URL-REGEXP of the association."
+  :type `(alist :key-type (regexp :tag "Regular expression matching URLs")
+                :value-type ,vc-backend-type)
+  :version "29.1")
+
 \f
+(defun vc-guess-backend (url)
+  "Guess the VC backend for URL.
+This function will internally query `vc-heuristic-alist'
+and return nil if it cannot reasonably guess."
+  (and url (alist-get url vc-heuristic-alist
+                      nil nil #'string-match-p)))
+
 ;; File property caching
 
 (defun vc-clear-context ()
@@ -3804,7 +3866,9 @@ vc-check-headers
   (interactive)
   (vc-call-backend (vc-backend buffer-file-name) 'check-headers))
 
-(defun vc-clone (remote &optional backend directory rev)
+(defvar vc--remotes-history)
+
+(defun vc-clone (remote &optional backend directory rev find-file)
   "Clone repository REMOTE using version-control BACKEND, into DIRECTORY.
 If successful, return the string with the directory of the checkout;
 otherwise return nil.
@@ -3814,20 +3878,41 @@ vc-clone
 If BACKEND is nil or omitted, the function iterates through every known
 backend in `vc-handled-backends' until one succeeds to clone REMOTE.
 If REV is non-nil, it indicates a specific revision to check out after
-cloning; the syntax of REV depends on what BACKEND accepts."
-  (setq directory (expand-file-name (or directory default-directory)))
-  (if backend
-      (progn
-        (unless (memq backend vc-handled-backends)
-          (error "Unknown VC backend %s" backend))
-        (vc-call-backend backend 'clone remote directory rev))
-    (catch 'ok
-      (dolist (backend vc-handled-backends)
-        (ignore-error vc-not-supported
-          (when-let ((res (vc-call-backend
-                           backend 'clone
-                           remote directory rev)))
-            (throw 'ok res)))))))
+cloning; the syntax of REV depends on what BACKEND accepts.
+If FIND-FILE is non-nil, switches to a buffer visiting DIRECTORY to
+which the repository was cloned.  It would be useful in scripts, but not
+in regular code.
+If called interactively, prompt for REMOTE, DIRECTORY and BACKEND,
+if BACKEND has not been automatically determined according to the REMOTE
+URL, in the minibuffer."
+  (interactive
+   (let* ((url (read-string "Remote: " nil 'vc--remotes-history))
+          (backend (or (vc-guess-backend url)
+                       (intern (completing-read
+                                "Backend: " vc-handled-backends nil t)))))
+     (list url backend
+           (read-directory-name
+            "Clone into new or empty directory: " nil nil
+            (lambda (dir) (or (not (file-exists-p dir))
+                              (directory-empty-p dir)))))))
+  (let* ((directory (expand-file-name (or directory default-directory)))
+         (backend (or backend (vc-guess-backend remote)))
+         (directory (if backend
+                        (progn
+                          (unless (memq backend vc-handled-backends)
+                            (error "Unknown VC backend %s" backend))
+                          (vc-call-backend backend 'clone remote directory rev))
+                      (catch 'ok
+                        (dolist (backend vc-handled-backends)
+                          (ignore-error vc-not-supported
+                            (when-let ((res (vc-call-backend
+                                             backend 'clone
+                                             remote directory rev)))
+                              (throw 'ok res))))))))
+    (when (file-directory-p directory)
+      (if (or find-file (called-interactively-p 'interactive))
+          (find-file directory)
+        directory))))
 
 (declare-function log-view-current-tag "log-view" (&optional pos))
 (defun vc-default-last-change (_backend file line)
-- 
2.46.0


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-- 
Best regards,
Aleksandr Vityazev

  reply	other threads:[~2024-09-29 18:23 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-09-19 13:18 bug#73357: [PATCH] Make vc-clone interactive Aleksandr Vityazev via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-19 13:36 ` Eli Zaretskii
2024-09-19 16:38   ` Aleksandr Vityazev via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-09-24 10:22     ` Philip Kaludercic
2024-09-29 18:23       ` Aleksandr Vityazev via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2024-10-01 11:09         ` Philip Kaludercic
2024-10-06 14:50           ` Aleksandr Vityazev via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-12 12:06             ` Eli Zaretskii
2024-10-24 10:19               ` Aleksandr Vityazev via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-24 10:43                 ` Philip Kaludercic
2024-10-24 11:26                   ` Sean Whitton
2024-10-24 12:31                     ` Aleksandr Vityazev via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-24 13:45                       ` Sean Whitton
2024-10-24 14:19                         ` Philip Kaludercic

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