Intercept Tree Sitter Parser

Build libtree-sitter-int Shared Object

• A C compiler (we like GCC)
• CMake [optional]

A CMake build script is pre-provided; use that to generate a build system, then invoke it.

cmake -B bld
cmake --build bld

This will compile and link a shared library tree-sitter-int within the bld subdirectory. It is recommended to copy it into ~/.tree_sitter/bin or alike. For the tree-sitter CLI to look in the right place, alter parser-directories in ~/tree-sitter/config.json. See official docs for more info.

Alternatively, use a compiler (and lots of flags) to build it. Make sure to change the output file name to the proper extension based on your platform.

gcc -O3 -march=native src/parser.c -shared -flto -fPIC -o tree-sitter-int.so -lm -lpthread -Wall -Wextra

Generate Parser from grammar.js *optional

• tree-sitter CLI

NOTE: Only one of the following needs to be completed.

Node.js

npm install
npx tree-sitter generate

Cargo

NOTE: Assuming you’ve built tree-sitter from source using Cargo and have successfully installed the CLI executable somewhere in your PATH environment variable, you can now just generate the grammar.

tree-sitter generate

What now?

Now that you have successfully generated the parser, the src directory has been populated with C source code representing the grammar, which can be built into a shared library and used by many different programs. See instructions above on building the shared object.

How to Use in Emacs 29/30+

NOTE: Emacs changes every day, so the info here may be out of date. Consult the documentation within Emacs for best results.

If tree-sitter-major-mode-language-alist is not nil, as in you have set it to another value and would like to retain it, use (add-to-list 'tree-sitter-major-mode-language-alist '(int-mode . int)), and don’t forget to also do this with int-ts-mode.

(setq tree-sitter-major-mode-language-alist '((int-mode . int) (int-ts-mode . int)))

Then use tree-sitter as you would normally. Try M-x tree-sitter-query-builder while in a int-mode buffer!

Emacs 30+

Also run the one above for older versions if you would like the old tree-sitter API to work (i.e. tree-sitter-query-builder), as the legacy tree-sitter functions are still included.

If treesit-extra-load-path is not nil, as in you have set it to another value and would like to retain it, use (add-to-list 'treesit-extra-load-path "path/to/here/bld").

Otherwise, if this is the only extra load path needed, use setq.

(setq treesit-extra-load-path '("path/to/here/bld"))

Then navigate to a buffer containing Intercept source code and try treesit-explore-mode. When it asks for a language, input int (short for Intercept). A new buffer will open containing the AST for the contents of the buffer—or, at least, the grammar’s current best approximation of it. You can even navigate through it, highlight different portions, etc. Very educational!

In the Intercept repository, you will find a int-ts-mode.el in the editor subdirectory which can be loaded and subsequently used for tree-sitter based syntax highlighting.