feat: add hidden flag to traverse hidden files

[a-kenji]

Add the hidden and no-hidden flag that allows configuring the traversal of hidden files.

Examples:

treefmt --hidden

will traverse hidden files.

treefmt --hidden --no-hidden

will not traverse hidden files, same as the default (treefmt).

treefmt --hidden --no-hidden --hidden

will traverse hidden files.

[zimbatm]

Thanks, I missed this PR before cutting the release.

I don't know precisely what use-case you have in mind, but wouldn't it make more sense to add the flag in the treefmt.toml config file? I suspect that the setting should be project-specific.

[a-kenji]

No worries.

I don't know precisely what use-case you have in mind, but wouldn't it make more sense to add the flag in the treefmt.toml config file? I suspect that the setting should be project-specific.

Oh yeah, good call. I will add a [global] configuration option.

For now my use-case would be uncovering hidden files that would be matched and then manually adding them to the treefmt.toml. In essence a helper for initializing project specific settings. But I imagine the flexibility can be useful in general. I don't really want to encourage by default for people to have to add the hidden option to traverse hidden files once or twice and then it stays there without really being wanted/needed.

In the future in regards to #244. Showing files that are covered/uncovered showing by default files that are not hidden, but optionally showing coverage of hidden files as well.

[zimbatm]

I think you're right, if it's in the config it would always format the .git folder as well, and that wouldn't be what we want either.

Let's just keep the command-line flag for now, since it helps with your use-case. Until we find a better way to make those distinctions as you mention with 244

[a-kenji]

I have rebased on top of main in order to make use of the testing system, and added tests for the hidden flag.

The exclude and gitignore files are respected when traversing with the --hidden flag, but as you said the .git folder will be traversed.

[zimbatm]

thanks!