Broken make fmt - license check has been deprecated from Rust nightly

[fulmicoton]

See rust-lang/rustfmt#5103

We need to find an alternative to do license check.

[fmassot]

I did not find an alternative in rust.
We can either:

• have a custom build.rs like in this project https://github.com/AleoHQ/snarkOS/pull/1807
• create a small crate that does the job.

I'm in favor of option 2.

[guilload]

There used to be license-check and license-fix commands in the Makefile based on this tool, which was clunky in my opinion but somewhat got the job done. We can reinstate those commands.

[fmassot]

yes, good idea

[saroh]

You could use diff for licence-check, then patch + cleanup diffs in license-fix.

$ diff <(sed 's/{\\d+}/2022/' .license_header.txt) <(head -n 19 quickwit-search/src/lib.rs)
1c1
< // Copyright (C) 2022 Quickwit, Inc.
---
> // Copyright (C) 2021 Quickwit, Inc.

[fulmicoton]

The previous tool sucked. I tried to package @saroh's diff solution into a bash script. It seems decent enough.