bug#60025: [PATCH] Add go-ts-mode and go-mod-ts-mode

[Yuan Fu]

> On Dec 14, 2022, at 8:21 AM, Randy Taylor <dev@rjt.dev> wrote:
> 
> On Wednesday, December 14th, 2022 at 07:02, Eli Zaretskii <eliz@gnu.org> 
> wrote:
>> 
>>> Date: Tue, 13 Dec 2022 19:39:18 +0000
>> 
>>> From: Randy Taylor dev@rjt.dev
>>> Cc: 60025@debbugs.gnu.org, theo@thornhill.no, casouri@gmail.com
>>> 
>>> +** New major mode 'go-mod-ts-mode'.
>>> +A major mode based on the tree-sitter library for editing go.mod
>>> +files. It includes support for font-locking and indentation. This
>>> +mode will be auto-enabled for go.mod files.
>> 
>> 
>> Please quote go.mod as 'go.mod' (we quote file names and symbols in
>> NEWS).
>> 
>> Otherwise, this LGTM, thanks.
>> 
> 
> Thanks, here's the new patch. I double-quoted it since that's what other file 
> names and extensions have in NEWS - hopefully that's right. Assuming that's 
> OK, should be good to install.
> 
> Yuan, did you see my original post in this thread? I'm wondering how to go 
> about tackling that indentation problem (I'm probably missing something very 
> simple and obvious).

Ah, oops, replies below:

> I am having a tiny bit of trouble with a go.mod indentation rule. Using the 
> patch, create a go.mod file anywhere, activate go-mod-ts-mode and add the 
> following:
> 
> require ()
> 
> Place point inside the parens, and then hit enter. The expectation is that 
> point will end up indented inside that block. If you add the text "test 
> v1.0.0" and hit TAB, it will indent properly (and if you hit enter after that 
> text it will indent properly for the next entry). If you go to the end of the 
> line for the top paren and hit enter, it will not indent (and we want it to). 
> It seems to give us no-node in that circumstance. Is there a simple indent 
> rule that can match exactly that that I'm missing?

I think you can just test for the parent? In C, if point is at an empty line 
after a statement in a block, like this:

int main() {
  return 0;
  |
}

The matched rule is (parent-is “compond_statement”), where compound_statement 
is the block. In your case, I guess you can test if parent is the argument list.

Yuan