Re: treesit-language-source-alist: Presets and/or custom variable?

[Arash Esbati <arash@gnu.org>]

Pankaj Jangid <pankaj@codeisgreat.org> writes:

> How to compile for langs like "tsx", which requires different value for
> "sourcedir" and "grammardir" in the helper build.sh script?

,----[ C-h v treesit-language-source-alist RET ]
| treesit-language-source-alist is a variable defined in ‘treesit.el’.
| 
| Its value is nil
| 
| Configuration for downloading and installing tree-sitter language grammars.
| 
| The value should be an alist where each element has the form
| 
|     (LANG . (URL REVISION SOURCE-DIR CC C++))
| 
| Only LANG and URL are mandatory.  LANG is the language symbol.
| URL is the Git repository URL for the grammar.
| 
| REVISION is the Git tag or branch of the desired version,
| defaulting to the latest default branch.
| 
| SOURCE-DIR is the relative subdirectory in the repository in which
| the grammar’s parser.c file resides, defaulting to "src".
| 
| CC and C++ are C and C++ compilers, defaulting to "cc" and
| "c++", respectively.
| 
`----

IIUC, SOURCE-DIR is what you're looking for.  Something like this should
do the trick:

(setq treesit-language-source-alist
      '((tsx . ("https://github.com/tree-sitter/tree-sitter-typescript.git"
                nil "tsx/src"))))

Best, Arash