bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Taka Obsid]

Hi, I'm using `java-ts-mode' and https://github.com/jdtsmith/outli.

While I tried to `revert-buffer' in a java file, it reports
`outline-map-region: Wrong type argument: number-or-marker-p, nil'.

The backtrace is:

```bt
Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
#f(compiled-function () #<bytecode -0x1964e0de811a96ab>)()
outline-map-region(#f(compiled-function () #<bytecode 
-0x1964e0de811a96ab>) 1 31382)
outline--hidden-headings-paths()
outline-revert-buffer-restore-visibility()
#f(compiled-function (f) #<bytecode 
0x6badcbe8273644b>)(outline-revert-buffer-restore-visibility)
run-hook-wrapped(#f(compiled-function (f) #<bytecode 0x6badcbe8273644b>) 
outline-revert-buffer-restore-visibility)
revert-buffer(t)
funcall-interactively(revert-buffer t)
call-interactively(revert-buffer record nil)
command-execute(revert-buffer record)
execute-extended-command(nil "revert-buffer" "rev")
funcall-interactively(execute-extended-command nil "revert-buffer" "rev")
call-interactively(execute-extended-command nil nil)
command-execute(execute-extended-command)
```

To repreduce it:

1. start Emacs with `java-ts-mode' and `outli' installed;

2. go to a java file;

3. `M-x outli-mode';

4. `M-x revert-buffer'.

The `outline-search-function' is `#'treesit-outline-search' and while I
set it to `nil', I can successfully revert the buffer.


```
emacs -q --eval "(progn
(add-to-list 'load-path \"/path/to/java-ts-mode/\")
(add-to-list 'load-path \"/path/to/outli/\")
(require 'java-ts-mode)
(require 'outli))"
```


In GNU Emacs 31.0.50 (build 1, aarch64-apple-darwin24.1.0, NS
appkit-2575.20 Version 15.1 (Build 24B83), git sha1 0756b1f2f54) of
2024-11-11 built on Leyline
Windowing system distributor 'Apple', version 10.3.2575
System Description: macOS 15.1

Configured using:
'configure --without-native-compilation --without-dbus --with-xwidgets
--with-tree-sitter --with-modules --with-pgtk
'CPPFLAGS=-I/opt/local/include
-isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk'
'LDFLAGS=-L/opt/local/lib -Wl,-headerpad_max_install_names -Wl,-rpath
/opt/local/lib/gcc14
-Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
-arch arm64''

Configured features:
ACL GIF GMP GNUTLS JPEG LIBXML2 MODULES NOTIFY KQUEUE NS PDUMPER PNG
SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER XIM XWIDGETS ZLIB

Important settings:
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix

Major mode: Java

Minor modes in effect:
eglot-java-mode: t
outli-mode: t
indent-bars--ts-mode: t
indent-bars-mode: t
copilot-mode: t
electric-pair-mode: t
projectile-mode: t
global-dict-line-mode: t
dict-line-mode: t
popper-echo-mode: t
popper-mode: t
adaptive-wrap-prefix-mode: t
visual-fill-column-mode: t
global-auto-revert-mode: t
save-place-mode: t
default-text-scale-mode: t
window-numbering-mode: t
auto-dim-other-buffers-mode: t
global-page-break-lines-mode: t
minions-mode: t
doom-modeline-mode: t
dogears-mode: t
recentf-mode: t
company-quickhelp-mode: t
company-quickhelp-local-mode: t
company-box-mode: t
global-company-mode: t
company-mode: t
vertico-mode: t
dirvish-override-dired-mode: t
dape-breakpoint-global-mode: t
eglot-inlay-hints-mode: t
eglot--managed-mode: t
flymake-mode: t
hexl-follow-ascii: t
emt-mode: t
mpvi-emms-integrated-mode: t
puni-global-mode: t
puni-mode: t
auto-compile-on-load-mode: t
auto-compile-on-save-mode: t
keyfreq-autosave-mode: t
keyfreq-mode: t
sis-global-inline-mode: t
sis-inline-mode: t
sis-global-context-mode: t
sis-context-mode: t
sis-global-respect-mode: t
sis-global-cursor-color-mode: t
sis-auto-refresh-mode: t
savehist-mode: t
consult-org-roam-mode: t
org-roam-db-autosync-mode: t
outline-minor-mode: t
marginalia-mode: t
global-blamer-mode: t
blamer-mode: t
global-diff-hl-mode: t
diff-hl-mode: t
yas-global-mode: t
yas-minor-mode: t
meow-global-mode: t
meow-mode: t
meow-normal-mode: t
meow-esc-mode: t
good-scroll-mode: t
focus-autosave-mode: t
override-global-mode: t
straight-use-package-mode: t
straight-package-neutering-mode: t
global-hl-line-mode: t
tooltip-mode: t
global-eldoc-mode: t
eldoc-mode: t
show-paren-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tab-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
window-divider-mode: t
minibuffer-regexp-mode: t
line-number-mode: t
indent-tabs-mode: t
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t

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bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Eli Zaretskii]

> Date: Mon, 18 Nov 2024 10:59:00 +0800
> From: Taka Obsid <liaotx2@gmail.com>
> 
> Hi, I'm using `java-ts-mode' and https://github.com/jdtsmith/outli.
> 
> While I tried to `revert-buffer' in a java file, it reports
> `outline-map-region: Wrong type argument: number-or-marker-p, nil'.
> 
> The backtrace is:
> 
> ```bt
> Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
> #f(compiled-function () #<bytecode -0x1964e0de811a96ab>)()
> outline-map-region(#f(compiled-function () #<bytecode 
> -0x1964e0de811a96ab>) 1 31382)
> outline--hidden-headings-paths()
> outline-revert-buffer-restore-visibility()
> #f(compiled-function (f) #<bytecode 
> 0x6badcbe8273644b>)(outline-revert-buffer-restore-visibility)
> run-hook-wrapped(#f(compiled-function (f) #<bytecode 0x6badcbe8273644b>) 
> outline-revert-buffer-restore-visibility)
> revert-buffer(t)
> funcall-interactively(revert-buffer t)
> call-interactively(revert-buffer record nil)
> command-execute(revert-buffer record)
> execute-extended-command(nil "revert-buffer" "rev")
> funcall-interactively(execute-extended-command nil "revert-buffer" "rev")
> call-interactively(execute-extended-command nil nil)
> command-execute(execute-extended-command)
> ```
> 
> To repreduce it:
> 
> 1. start Emacs with `java-ts-mode' and `outli' installed;
> 
> 2. go to a java file;
> 
> 3. `M-x outli-mode';
> 
> 4. `M-x revert-buffer'.
> 
> The `outline-search-function' is `#'treesit-outline-search' and while I
> set it to `nil', I can successfully revert the buffer.
> 
> 
> ```
> emacs -q --eval "(progn
> (add-to-list 'load-path \"/path/to/java-ts-mode/\")
> (add-to-list 'load-path \"/path/to/outli/\")
> (require 'java-ts-mode)
> (require 'outli))"
> ```

Thanks, this seems to be a problem in the outli package?  Because the
error is signaled by one of its functions (a hook it places on
revert-buffer-function, I guess?).

Did you report this to the developer of outli?  If not, I suggest to
report it there first.

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Taka Obsid]

[-- Attachment #1: Type: text/plain, Size: 2393 bytes --]

Yes, I have reported it in https://github.com/jdtsmith/outli/issues/17 
and the developer
recommended me to file this bug report. This is what he said:

 > This seems to be a new conflict with Emacs 31, and potentially a 
problem with |treesit-outline|.
 > Can you please file an Emacs bug report and link it here?

在 2024/11/18 20:29, Eli Zaretskii 写道:
>> Date: Mon, 18 Nov 2024 10:59:00 +0800
>> From: Taka Obsid<liaotx2@gmail.com>
>>
>> Hi, I'm using `java-ts-mode' andhttps://github.com/jdtsmith/outli.
>>
>> While I tried to `revert-buffer' in a java file, it reports
>> `outline-map-region: Wrong type argument: number-or-marker-p, nil'.
>>
>> The backtrace is:
>>
>> ```bt
>> Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
>> #f(compiled-function () #<bytecode -0x1964e0de811a96ab>)()
>> outline-map-region(#f(compiled-function () #<bytecode
>> -0x1964e0de811a96ab>) 1 31382)
>> outline--hidden-headings-paths()
>> outline-revert-buffer-restore-visibility()
>> #f(compiled-function (f) #<bytecode
>> 0x6badcbe8273644b>)(outline-revert-buffer-restore-visibility)
>> run-hook-wrapped(#f(compiled-function (f) #<bytecode 0x6badcbe8273644b>)
>> outline-revert-buffer-restore-visibility)
>> revert-buffer(t)
>> funcall-interactively(revert-buffer t)
>> call-interactively(revert-buffer record nil)
>> command-execute(revert-buffer record)
>> execute-extended-command(nil "revert-buffer" "rev")
>> funcall-interactively(execute-extended-command nil "revert-buffer" "rev")
>> call-interactively(execute-extended-command nil nil)
>> command-execute(execute-extended-command)
>> ```
>>
>> To repreduce it:
>>
>> 1. start Emacs with `java-ts-mode' and `outli' installed;
>>
>> 2. go to a java file;
>>
>> 3. `M-x outli-mode';
>>
>> 4. `M-x revert-buffer'.
>>
>> The `outline-search-function' is `#'treesit-outline-search' and while I
>> set it to `nil', I can successfully revert the buffer.
>>
>>
>> ```
>> emacs -q --eval "(progn
>> (add-to-list 'load-path \"/path/to/java-ts-mode/\")
>> (add-to-list 'load-path \"/path/to/outli/\")
>> (require 'java-ts-mode)
>> (require 'outli))"
>> ```
> Thanks, this seems to be a problem in the outli package?  Because the
> error is signaled by one of its functions (a hook it places on
> revert-buffer-function, I guess?).
>
> Did you report this to the developer of outli?  If not, I suggest to
> report it there first.

[-- Attachment #2: Type: text/html, Size: 3041 bytes --]

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Eli Zaretskii]

> Date: Tue, 19 Nov 2024 09:47:34 +0800
> Cc: 74412@debbugs.gnu.org
> From: Taka Obsid <liaotx2@gmail.com>
> 
> Yes, I have reported it in https://github.com/jdtsmith/outli/issues/17 and the developer
> recommended me to file this bug report. This is what he said:
> 
> > This seems to be a new conflict with Emacs 31, and potentially a problem with treesit-outline. 
> > Can you please file an Emacs bug report and link it here?

Yuan, could you please take a look?

> 在 2024/11/18 20:29, Eli Zaretskii 写道:
> 
>  Date: Mon, 18 Nov 2024 10:59:00 +0800
> From: Taka Obsid <liaotx2@gmail.com>
> 
> Hi, I'm using `java-ts-mode' and https://github.com/jdtsmith/outli.
> 
> While I tried to `revert-buffer' in a java file, it reports
> `outline-map-region: Wrong type argument: number-or-marker-p, nil'.
> 
> The backtrace is:
> 
> ```bt
> Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
> #f(compiled-function () #<bytecode -0x1964e0de811a96ab>)()
> outline-map-region(#f(compiled-function () #<bytecode 
> -0x1964e0de811a96ab>) 1 31382)
> outline--hidden-headings-paths()
> outline-revert-buffer-restore-visibility()
> #f(compiled-function (f) #<bytecode 
> 0x6badcbe8273644b>)(outline-revert-buffer-restore-visibility)
> run-hook-wrapped(#f(compiled-function (f) #<bytecode 0x6badcbe8273644b>) 
> outline-revert-buffer-restore-visibility)
> revert-buffer(t)
> funcall-interactively(revert-buffer t)
> call-interactively(revert-buffer record nil)
> command-execute(revert-buffer record)
> execute-extended-command(nil "revert-buffer" "rev")
> funcall-interactively(execute-extended-command nil "revert-buffer" "rev")
> call-interactively(execute-extended-command nil nil)
> command-execute(execute-extended-command)
> ```
> 
> To repreduce it:
> 
> 1. start Emacs with `java-ts-mode' and `outli' installed;
> 
> 2. go to a java file;
> 
> 3. `M-x outli-mode';
> 
> 4. `M-x revert-buffer'.
> 
> The `outline-search-function' is `#'treesit-outline-search' and while I
> set it to `nil', I can successfully revert the buffer.
> 
> 
> ```
> emacs -q --eval "(progn
> (add-to-list 'load-path \"/path/to/java-ts-mode/\")
> (add-to-list 'load-path \"/path/to/outli/\")
> (require 'java-ts-mode)
> (require 'outli))"
> ```
> 
> 
> Thanks, this seems to be a problem in the outli package?  Because the
> error is signaled by one of its functions (a hook it places on
> revert-buffer-function, I guess?).
> 
> Did you report this to the developer of outli?  If not, I suggest to
> report it there first.

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Juri Linkov]

> While I tried to `revert-buffer' in a java file, it reports
> `outline-map-region: Wrong type argument: number-or-marker-p, nil'.
>
> The backtrace is:
>
> ```bt
> Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
> #f(compiled-function () #<bytecode -0x1964e0de811a96ab>)()
> outline-map-region(#f(compiled-function () #<bytecode -0x1964e0de811a96ab>)
> 1 31382)
> outline--hidden-headings-paths()
> outline-revert-buffer-restore-visibility()
> #f(compiled-function (f) #<bytecode
>  0x6badcbe8273644b>)(outline-revert-buffer-restore-visibility)
> run-hook-wrapped(#f(compiled-function (f) #<bytecode 0x6badcbe8273644b>)
> outline-revert-buffer-restore-visibility)
> revert-buffer(t)

I suspect this depends on your java file since I tried some java files
existing in the emacs repo, and all they work fine.  Could you try
to find a minimal java file to reproduce the problem?

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Taka Obsid]

I'm using `straight' so I start the emacs as

```sh

/Applications/Emacs.app/Contents/MacOS/Emacs -q --eval "(progn
           (add-to-list 'load-path 
\"~/.emacs.d/straight/build/java-ts-mode\")
           (add-to-list 'load-path \"~/.emacs.d/straight/build/outli\")
           (require 'java-ts-mode)
           (require 'outli))"

```

The file I tried is

```java

public class Test {
     public static void main(String[] args) {

     }
}

```

You might need to enable the outli-mode in the java file manually. It 
seems this bug only appears in gui emacs. The `revert-buffer' works fine 
in tui.

在 2024/11/20 02:09, Juri Linkov 写道:
>> While I tried to `revert-buffer' in a java file, it reports
>> `outline-map-region: Wrong type argument: number-or-marker-p, nil'.
>>
>> The backtrace is:
>>
>> ```bt
>> Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
>> #f(compiled-function () #<bytecode -0x1964e0de811a96ab>)()
>> outline-map-region(#f(compiled-function () #<bytecode -0x1964e0de811a96ab>)
>> 1 31382)
>> outline--hidden-headings-paths()
>> outline-revert-buffer-restore-visibility()
>> #f(compiled-function (f) #<bytecode
>>   0x6badcbe8273644b>)(outline-revert-buffer-restore-visibility)
>> run-hook-wrapped(#f(compiled-function (f) #<bytecode 0x6badcbe8273644b>)
>> outline-revert-buffer-restore-visibility)
>> revert-buffer(t)
> I suspect this depends on your java file since I tried some java files
> existing in the emacs repo, and all they work fine.  Could you try
> to find a minimal java file to reproduce the problem?

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Juri Linkov]

> I'm using `straight' so I start the emacs as
>
> ```sh
>
> /Applications/Emacs.app/Contents/MacOS/Emacs -q --eval "(progn
>           (add-to-list 'load-path
> \"~/.emacs.d/straight/build/java-ts-mode\")

Where do you get straight's version of java-ts-mode?

Does it differ from lisp/progmodes/java-ts-mode.el
provided by Emacs core?

Do you use treesit.el from `straight' too?

>           (add-to-list 'load-path \"~/.emacs.d/straight/build/outli\")
>           (require 'java-ts-mode)
>           (require 'outli))"
>
> ```
>
> The file I tried is
>
> ```java
>
> public class Test {
>     public static void main(String[] args) {
>
>     }
> }
>
> ```
>
> You might need to enable the outli-mode in the java file manually.

I tried this with lisp/progmodes/java-ts-mode.el,
and can't reproduce the bug.

> It seems this bug only appears in gui emacs. The `revert-buffer' works
> fine in tui.

Very strange, there should be no difference between gui and tui.

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Taka Obsid]

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OK I just find the java-ts-mode and treesit.el is not from `straight'... 
So the start script now only load `outli'.


I tried clone `outli' into `~/src/outli', and it works fine, while the 
straight build version is not.


I diffed the `~/.emacs.d/straight/build/outli/outli.el' with 
`~/src/outli/outli.el' and found that they are same. But there is a

file `outli-autoloads.el' in `~/.emacs.d/straight/build/outli', which be 
generated by `straight'. This file contains:

```elisp

(autoload 'outli-mode "outli" "\ Simple outline mode interaction based 
on comment-headings. This is a minor mode. If called interactively, 
toggle the `Outli mode' mode. If the prefix argument is positive, enable 
the mode, and if it is zero or negative, disable the mode. If called 
from Lisp, toggle the mode if ARG is `toggle'. Enable the mode if ARG is 
nil, omitted, or is a positive number. Disable the mode if ARG is a 
negative number. To check whether the minor mode is enabled in the 
current buffer, evaluate the variable `outli-mode'. The mode's hook is 
called both when the mode is enabled and when it is disabled. 
\\{outli-mode-map} (fn &optional ARG)" t) (register-definition-prefixes 
"outli" '("outli-"))

```

I commented the line `(register-definition-prefixes "outli" 
'("outli-"))', and load `~/.emacs.d/straight/build/outli/outli.el',

and the `revert-buffer' works.

在 2024/11/20 15:15, Juri Linkov 写道:
>> I'm using `straight' so I start the emacs as
>>
>> ```sh
>>
>> /Applications/Emacs.app/Contents/MacOS/Emacs -q --eval "(progn
>>            (add-to-list 'load-path
>> \"~/.emacs.d/straight/build/java-ts-mode\")
> Where do you get straight's version of java-ts-mode?
>
> Does it differ from lisp/progmodes/java-ts-mode.el
> provided by Emacs core?
>
> Do you use treesit.el from `straight' too?
>
>>            (add-to-list 'load-path \"~/.emacs.d/straight/build/outli\")
>>            (require 'java-ts-mode)
>>            (require 'outli))"
>>
>> ```
>>
>> The file I tried is
>>
>> ```java
>>
>> public class Test {
>>      public static void main(String[] args) {
>>
>>      }
>> }
>>
>> ```
>>
>> You might need to enable the outli-mode in the java file manually.
> I tried this with lisp/progmodes/java-ts-mode.el,
> and can't reproduce the bug.
>
>> It seems this bug only appears in gui emacs. The `revert-buffer' works
>> fine in tui.
> Very strange, there should be no difference between gui and tui.

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bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Juri Linkov]

> I commented the line `(register-definition-prefixes "outli" '("outli-"))',
> and load `~/.emacs.d/straight/build/outli/outli.el',
>
> and the `revert-buffer' works. 

This is a very weird effect.  Maybe it's caused by file versions mismatch?

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Juri Linkov]

> I commented the line `(register-definition-prefixes "outli" '("outli-"))',
> and load `~/.emacs.d/straight/build/outli/outli.el',
> and the `revert-buffer' works. 

Ok, I looked more at the package outli, and now can reproduce the issue,
I get the same backtrace:

Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
  #f(compiled-function () #<bytecode -0x19404f988c6a0bab>)()
  outline-map-region(#f(compiled-function () #<bytecode -0x19404f988c6a0bab>) 1 75)
  outline--hidden-headings-paths()
  outline-revert-buffer-restore-visibility()
  #f(compiled-function (f) #<bytecode 0x1cc541c8fdc4ae5e>)(outline-revert-buffer-restore-visibility)
  revert-buffer(t t)
  revert-buffer-quick(nil)
  funcall-interactively(revert-buffer-quick nil)
  command-execute(revert-buffer-quick)

This error comes after I removed the line

  outline-search-function nil

from `outli-mode'.  Please note that this line was added
quite recently in this commit:

https://github.com/jdtsmith/outli/commit/1366c230421aa834a9f4c986e31e63aa54e1c70b

So I'm 100% sure that you are using an old straight version from
(add-to-list 'load-path \"~/.emacs.d/straight/build/outli\")

Please upgrade the outli straight package to resolve the problem.

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Taka Obsid]

You'r right, I repull and rebuild `outli' then it works. Thanks!

在 2024/11/21 02:23, Juri Linkov 写道:
>> I commented the line `(register-definition-prefixes "outli" '("outli-"))',
>> and load `~/.emacs.d/straight/build/outli/outli.el',
>> and the `revert-buffer' works.
> Ok, I looked more at the package outli, and now can reproduce the issue,
> I get the same backtrace:
>
> Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
>    #f(compiled-function () #<bytecode -0x19404f988c6a0bab>)()
>    outline-map-region(#f(compiled-function () #<bytecode -0x19404f988c6a0bab>) 1 75)
>    outline--hidden-headings-paths()
>    outline-revert-buffer-restore-visibility()
>    #f(compiled-function (f) #<bytecode 0x1cc541c8fdc4ae5e>)(outline-revert-buffer-restore-visibility)
>    revert-buffer(t t)
>    revert-buffer-quick(nil)
>    funcall-interactively(revert-buffer-quick nil)
>    command-execute(revert-buffer-quick)
>
> This error comes after I removed the line
>
>    outline-search-function nil
>
> from `outli-mode'.  Please note that this line was added
> quite recently in this commit:
>
> https://github.com/jdtsmith/outli/commit/1366c230421aa834a9f4c986e31e63aa54e1c70b
>
> So I'm 100% sure that you are using an old straight version from
> (add-to-list 'load-path \"~/.emacs.d/straight/build/outli\")
>
> Please upgrade the outli straight package to resolve the problem.

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Eli Zaretskii]

> Cc: 74412@debbugs.gnu.org
> Date: Thu, 21 Nov 2024 09:48:59 +0800
> From: Taka Obsid <liaotx2@gmail.com>
> 
> You'r right, I repull and rebuild `outli' then it works. Thanks!

Thanks to both of you for investigating.  I'm therefore closing this
bug.

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Daan Ro]

[-- Attachment #1.1: Type: text/plain, Size: 224 bytes --]

Personally I also find treesit's decision to set outline variables
somewhat intrusive. I have to advice `treesit-major-mode-setup` to
disable that. If only there is an easier way to do it like the
attached patch.

Daanturo


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[-- Attachment #2: 0001-Add-custom-option-treesit-enable-outline-settings.patch --]
[-- Type: application/octet-stream, Size: 1324 bytes --]

From a6aa6420640922c748b173cfeb1cf20ee1baade8 Mon Sep 17 00:00:00 2001
From: Daanturo <daanturo@gmail.com>
Date: Wed, 20 Nov 2024 14:33:02 +0000
Subject: [PATCH] Add custom option treesit-enable-outline-settings

* lisp/treesit.el: Define the variable and use it in
treesit-major-mode-setup.
---
 lisp/treesit.el | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lisp/treesit.el b/lisp/treesit.el
index 2518204ce93..45720325f73 100644
--- a/lisp/treesit.el
+++ b/lisp/treesit.el
@@ -943,6 +943,11 @@ treesit-font-lock-level
   :set #'treesit--font-lock-level-setter
   :version "29.1")
 
+(defcustom treesit-enable-outline-settings t
+  "Non-nil means Tree sitter-based outline settings are enabled."
+  :type 'boolean
+  :version "31.1")
+
 (defvar-local treesit--font-lock-query-expand-range (cons 0 0)
   "The amount to expand the start and end of the region when fontifying.
 This should be a cons cell (START . END).  When fontifying a
@@ -3155,6 +3160,7 @@ treesit-major-mode-setup
 
   ;; Outline minor mode.
   (when (and (or treesit-outline-predicate treesit-simple-imenu-settings)
+             treesit-enable-outline-settings
              (not (seq-some #'local-variable-p
                             '(outline-search-function
                               outline-regexp outline-level))))
-- 
2.47.0

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Juri Linkov]

> Personally I also find treesit's decision to set outline variables
> somewhat intrusive. I have to advice `treesit-major-mode-setup` to
> disable that. If only there is an easier way to do it like the
> attached patch.
>
> +(defcustom treesit-enable-outline-settings t
> +  "Non-nil means Tree sitter-based outline settings are enabled."
> +  :type 'boolean
> +  :version "31.1")

Should such an option be more general and allow
disabling some other features too?

There is already 'treesit-font-lock-recompute-features'.
So a new option could have a similar name, e.g.
'treesit-disable-features' that the users could set to e.g.

  (setopt treesit-disable-features '(outline imenu))

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Daan Ro]

[-- Attachment #1: Type: text/plain, Size: 985 bytes --]

> So a new option could have a similar name, e.g.
> 'treesit-disable-features' that the users could set to e.g.
>
> (setopt treesit-disable-features '(outline imenu))

That's much better, indeed.
Daanturo

On Nov 21 2024, at 12:18 am, Juri Linkov <juri@linkov.net> wrote:
> > Personally I also find treesit's decision to set outline variables
> > somewhat intrusive. I have to advice `treesit-major-mode-setup` to
> > disable that. If only there is an easier way to do it like the
> > attached patch.
> >
> > +(defcustom treesit-enable-outline-settings t
> > + "Non-nil means Tree sitter-based outline settings are enabled."
> > + :type 'boolean
> > + :version "31.1")
>
> Should such an option be more general and allow
> disabling some other features too?
>
> There is already 'treesit-font-lock-recompute-features'.
> So a new option could have a similar name, e.g.
> 'treesit-disable-features' that the users could set to e.g.
>
> (setopt treesit-disable-features '(outline imenu))

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bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Juri Linkov]

Yuan, what do you think about adding a new option
that will allow disabling some features?

>>> Personally I also find treesit's decision to set outline variables
>>> somewhat intrusive. I have to advice `treesit-major-mode-setup` to
>>> disable that. If only there is an easier way to do it like the
>>> attached patch.
>>>
>>> +(defcustom treesit-enable-outline-settings t
>>> + "Non-nil means Tree sitter-based outline settings are enabled."
>>> + :type 'boolean
>>> + :version "31.1")
>> 
>> Should such an option be more general and allow
>> disabling some other features too?
>> 
>> There is already 'treesit-font-lock-recompute-features'.
>> So a new option could have a similar name, e.g.
>> 'treesit-disable-features' that the users could set to e.g.
>>
>> (setopt treesit-disable-features '(outline imenu))

>> So a new option could have a similar name, e.g.
>> 'treesit-disable-features' that the users could set to e.g.
>> 
>> (setopt treesit-disable-features '(outline imenu))
>
> That's much better, indeed.

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Eli Zaretskii]

> Cc: "74412@debbugs.gnu.org" <74412@debbugs.gnu.org>,
>  "liaotx2@gmail.com" <liaotx2@gmail.com>
> From: Juri Linkov <juri@linkov.net>
> Date: Wed, 20 Nov 2024 19:18:41 +0200
> 
> > Personally I also find treesit's decision to set outline variables
> > somewhat intrusive. I have to advice `treesit-major-mode-setup` to
> > disable that. If only there is an easier way to do it like the
> > attached patch.
> >
> > +(defcustom treesit-enable-outline-settings t
> > +  "Non-nil means Tree sitter-based outline settings are enabled."
> > +  :type 'boolean
> > +  :version "31.1")
> 
> Should such an option be more general and allow
> disabling some other features too?

I don't see a need for an option at all.  All tree-sitter based modes
use these search functions, so treesit.el simply acts on their behalf
here.  It makes no sense to let users control how a major mode
customizes outline-minor-mode, because the major mode is supposed to
know how to adapt outlines with its main syntax, and what a heading
means in the context of that mode.

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Eli Zaretskii]

> Cc: "74412@debbugs.gnu.org" <74412@debbugs.gnu.org>
> Date: Thu, 21 Nov 2024 00:06:41 +0700
> From: Daan Ro <daanturo@gmail.com>
> 
> Personally I also find treesit's decision to set outline variables
> somewhat intrusive.

I don't understand why.  These variables are meant to be set by modes,
so treesit.el uses them exactly as intended.

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Daan Ro]

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Before treesit.el went to set those variables, there have been already a
bunch of packages based on outline-minor-mode for partitioning code into
sections using comments only by highlighting headers and providing
navigation, folding, etc. inspired by emacs-lisp-mode's outline-regexp
settings.

Such ones enable a feel of "literate" programming by bringing
outline-mode features to code section delimited by headings (special
comments like ";;;", ";; *") using just comments regardless of code
semantic.

The above is my use of outline-minor-mode, maybe other people have
different use cases. treesit.el makes the configuration harder by the
additional variable setting. I wish there's a hook like
treesit-after-major-mode-setup-hook to let people fine-tune or even undo
settings, but of course treesit-disable-features to prevent any
execution from the start is still better.

Daanturo

On Nov 21 2024, at 1:50 am, Eli Zaretskii <eliz@gnu.org> wrote:
> > Cc: "74412@debbugs.gnu.org" <74412@debbugs.gnu.org>
> > Date: Thu, 21 Nov 2024 00:06:41 +0700
> > From: Daan Ro <daanturo@gmail.com>
> >
> > Personally I also find treesit's decision to set outline variables
> > somewhat intrusive.
>
> I don't understand why. These variables are meant to be set by modes,
> so treesit.el uses them exactly as intended.
>


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bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Eli Zaretskii]

> Date: Thu, 21 Nov 2024 15:16:14 +0700
> From: Daan Ro <daanturo@gmail.com>
> Cc: "liaotx2@gmail.com" <liaotx2@gmail.com>, 
>  "74412@debbugs.gnu.org" <74412@debbugs.gnu.org>
> 
> Before treesit.el went to set those variables, there have been already a
> bunch of packages based on outline-minor-mode for partitioning code into
> sections using comments only by highlighting headers and providing
> navigation, folding, etc. inspired by emacs-lisp-mode's outline-regexp
> settings.
> 
> Such ones enable a feel of "literate" programming by bringing
> outline-mode features to code section delimited by headings (special
> comments like ";;;", ";; *") using just comments regardless of code
> semantic.
> 
> The above is my use of outline-minor-mode, maybe other people have
> different use cases. treesit.el makes the configuration harder by the
> additional variable setting. I wish there's a hook like
> treesit-after-major-mode-setup-hook to let people fine-tune or even undo
> settings, but of course treesit-disable-features to prevent any
> execution from the start is still better.

There's a mode hook run by every mode based on treesit.el, so if the
settings by treesit.el are inappropriate, and the major mode itself
somehow decided to use them anyway, and the user doesn't like that,
the user should be able to countermand the treesit.el settings in that
mode hook.

In addition, packages that use outline-minor-mode in ways that are
incompatible with what treesit.el does should be able to reset these
variables to nil or to some other function, as they need.

The purpose of treesit.el doing this is to make it easier for
treesit-based modes to set up their support for outline-minor-mode, so
that we won't need to perform the same settings in every major mode
based on tree-sitter.  I don't see anything wrong here.  Modes and
packages which for some reason don't like that should override these
values, and that is easy enough to do without adding any user options.
Let's keep in mind that every new user option makes Emacs more complex
to use for users, which need to learn about the option and modify
their init files.  Instead, modes and packages should DTRT by default
without requiring users to get their (mode's) act together.

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Yuan Fu]

> On Nov 21, 2024, at 1:07 AM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
>> Date: Thu, 21 Nov 2024 15:16:14 +0700
>> From: Daan Ro <daanturo@gmail.com>
>> Cc: "liaotx2@gmail.com" <liaotx2@gmail.com>, 
>> "74412@debbugs.gnu.org" <74412@debbugs.gnu.org>
>> 
>> Before treesit.el went to set those variables, there have been already a
>> bunch of packages based on outline-minor-mode for partitioning code into
>> sections using comments only by highlighting headers and providing
>> navigation, folding, etc. inspired by emacs-lisp-mode's outline-regexp
>> settings.
>> 
>> Such ones enable a feel of "literate" programming by bringing
>> outline-mode features to code section delimited by headings (special
>> comments like ";;;", ";; *") using just comments regardless of code
>> semantic.
>> 
>> The above is my use of outline-minor-mode, maybe other people have
>> different use cases. treesit.el makes the configuration harder by the
>> additional variable setting. I wish there's a hook like
>> treesit-after-major-mode-setup-hook to let people fine-tune or even undo
>> settings, but of course treesit-disable-features to prevent any
>> execution from the start is still better.
> 
> There's a mode hook run by every mode based on treesit.el, so if the
> settings by treesit.el are inappropriate, and the major mode itself
> somehow decided to use them anyway, and the user doesn't like that,
> the user should be able to countermand the treesit.el settings in that
> mode hook.
> 
> In addition, packages that use outline-minor-mode in ways that are
> incompatible with what treesit.el does should be able to reset these
> variables to nil or to some other function, as they need.
> 
> The purpose of treesit.el doing this is to make it easier for
> treesit-based modes to set up their support for outline-minor-mode, so
> that we won't need to perform the same settings in every major mode
> based on tree-sitter.  I don't see anything wrong here.  Modes and
> packages which for some reason don't like that should override these
> values, and that is easy enough to do without adding any user options.
> Let's keep in mind that every new user option makes Emacs more complex
> to use for users, which need to learn about the option and modify
> their init files.  Instead, modes and packages should DTRT by default
> without requiring users to get their (mode's) act together.


The issue is usually that tree-sitter automatically sets outline-search-function, and the package that uses outline-minor-mode only sets outline-regexp and doesn’t set outline-search-function to nil. Since outline prioritizes outline-search-function over outline-regex, it appears that tree-sitter’s outline setting overrides that of the package.

Most outline-related packages don’t set outline-search-function to nil since it’s usually nil by default. So tree-sitter’s behavior will surely break these packages. But since tree-sitter’s setup runs before minor modes, we can’t really tell if the user will later enable a minor mode that tree-sitter’s setup might break.

TRT here is probably for the packages to explicitly set outline-search-function to nil.

Yuan

bug#74412: 31.0.50; Treesit-outline conflict with outli in Emacs 31

[Juri Linkov]

> The above is my use of outline-minor-mode, maybe other people have
> different use cases. treesit.el makes the configuration harder by the
> additional variable setting. I wish there's a hook like
> treesit-after-major-mode-setup-hook to let people fine-tune or even undo
> settings, but of course treesit-disable-features to prevent any
> execution from the start is still better.

If a ts-mode doesn't allow using a hook to override
mode's default settings, this would be a serious limitation.
But does such a limitation really exist?
It seems there is no need to add treesit-after-major-mode-setup-hook,
since I see no problem with using the existing hooks.
For example, such customization correctly overrides outline settings
for both non-ts and ts-modes:

  ;; non-ts
  (add-hook 'ruby-base-mode-hook
            (lambda ()
              ;; Add more Rails spec keywords
              (setq-local outline-regexp
                          (concat "^\\s *"
                                  (regexp-opt '("module" "class" "def" "private"
                                                "describe" "feature" "context" "before" "after"
                                                "it" "fit" "xit"))
                                  "\\_>"))))
  ;; same for ts-mode
  (add-hook 'ruby-ts-mode-hook
            (lambda ()
              ;; Add more Rails spec keywords
              (setq-local
               treesit-outline-predicate
               (lambda (node)
                 (or (string-match-p
                      (rx bos (or "module"
                                  "class"
                                  "singleton_class"
                                  "method"
                                  "singleton_method"
                                  "alias")
                          eos)
                      (treesit-node-type node))
                     (and (equal (treesit-node-type node) "call")
                          (if-let ((method (treesit-node-child-by-field-name
                                            node "method")))
                              (string-match-p
                               (rx bos (or "describe"
                                           "feature"
                                           "context"
                                           "before"
                                           "after"
                                           "it"
                                           "fit"
                                           "test")
                                   eos)
                               (treesit-node-text method)))))))))