How to specify what to lint

One design problem we’re wrestling with is how to specify the file names to lint.

It is a chicken-and-egg situation: if there is something bad in the file name, you don’t (can’t?) use it as a command line parameter.

Our current thoughts:

• Use the current directory (as retrieved by the rust std::env::fs::current_dir() function) as the default.
• If you don’t want the current directory, you can specify one on the command line, but it should be a directory that you named yourself and is under your direct control.
• Require that everything in the directory be either linted or specifically ignored.

Paths not taken

We looked at other software that specifies files/directories. We might use some of them for deciding which rules to apply, but the overall directory will be as above.

• Github Actions - an array of either paths (which supports ! nots) or paths-ignore rules.
• eslint - arrays of files and ignores, plus global ignores
• prettier - takes files on the command line or uses fast-glob patterns (also on the command line)

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