Make `unmake` output a consistent format

[itaranto]

Right now, the unmake command prints findings in three different ways:

• <SEVERITY>: <FILE>: <LINE>:<COLUMN>: <MESSAGE>
• <SEVERITY>: <FILE>: <LINE>: <MESSAGE>
• <SEVERITY>: <FILE>: <MESSAGE>

This makes it hard to parse using regular expressions. This is particularly helpful for integrating unmake with text editors like Neovim.

Ideally the output should either always contain the line and column numbers, or at least provide a different format, like JSON.

[mcandre]

Indeed, some details apply to files as a whole rather than any particular line(s). Such as the casing of the filename.

Don't attempt to parse logs, that's a fool's errand. unmake is a library.

[itaranto]

Don't attempt to parse logs, that's a fool's errand. unmake is a library.

But isn't it also a CLI program? I'm confused.

Also, I get that findings for the whole file don't have line:column, but what about some cases I'm seeing when it's just the line and not the column?

[itaranto]

Anyway, for the record, the current output works for me even without the column by using this Lua match expression (%w+): (.-):(%d*):?(%d*): (.+).

Lines that doesn't have neither line or column are not picked up by this, but I can live with that.

[mcandre]

Indeed, unmake provides both an API and a CLI.