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Basic formatter for the Typst language with a future without a future 😄!

It's been a fun ride everyone but that's where I stop, feel free to fork etc.

last typst supported version is 0.10.

If I get the formatter fever again I'll probably try contributing to https://github.com/Enter-tainer/typstyle/ and you should check it out ;).

Goals

Features

State

It's not always pretty, it sometimes break the code in math mode, but it should be safe for code and markup.

Installing

cargo install --git https://github.com/astrale-sharp/typstfmt.git

Setting up a pre-commit hook

Optionally, you can setup a git hook to format your files at each commit:

echo "set -e

for f in \$(git ls-files --full-name -- '*.typ') ; do
    typstfmt --check \$f --verbose
done" > .git/hooks/pre-commit

chmod +x .git/hooks/pre-commit

Now if you try to commit unformatted files, they will be caught and the commit will fail, telling you which file should be fixed.

Notes:

Contributing

Architecture

Main logic

Since we're visiting a AST (which is a tree) we have a recursive function visit(node: &LinkedNode, ctx: &mut Ctx) that meets all the nodes in the tree.

It formats the children first (bottom up), then the parent decide what to do with their children.

Children have access to arbitrary context (they can know the kind of their parents, who are their siblings etc).

Roadmap

Once the test suite is large enough and the formatting is satisfying, create an abstraction to make the codebase easier to work with.

One person cannot come up with good formatting default. This will first be configurable and then with experience and opinions from the community, default will be tuned.

Testing and visualizing

Installing Insta

We use insta! If you don't have it installed take a look here (hint: use cargo binstall)

Using insta here

Can I see it in action?

To see how it currently formats all the snippets:

Is that all I have to help me test?

Tracing

Of course not! We have tracing enabled during tests!

If you're contributing tests you should add a test case under src/tests for instance: make_test!(call_func_empty, "#f()");

then running your tests: cargo test && cargo insta review

If the info log isn't enough, run DEBUG=true cargo test. If you wish to pipe to a file run NO_COLOR=true cargo test you may also set the NOLOG env variable if you wish to disable logging entirely.

Fmttest (TO BE IMPLEMENTED)

On the fmttest branch, you can see the skeleton of a program that will automate finding which range, when formatted, was not valid anymore (broke the semantic of the code).

Thanks (chronological)