How to find unused exported functions/variables/constants/types?

[guettli]

I would like to get a warning if my code has unused exported functions/variables/constants/types.

Afaik the linters "staticcheck" and "unused" do not support that.

There is deadcode, but it is deprecated and does only check for functions (not variables/constants/types). Afaik deadcode only detect unused functions (not variables/constants/types).

If something is exported, it should be tested.

If it is tested, then it is used, and the linter I am looking for would not complain.

I don't want it to be enabled by default. But for projects where test coverage is mandatory, I want to enable it.

[mattkasun]

Use revive linter

[guettli]

We use revive, but it does not complain.

Can you please elaborate how you configure revive so that unused exported identifiers create a warning?

[bombsimon]

I think this is a not so straightforward topic. #4819 (comment)

Some context on which linters detects what and which ones are deprecated can be found in #1841.

[guettli]

...is asking for false positives.

Of course. I don't want it to be enabled by default. But for projects where test coverage is mandatory, I want to enable it.

[alexandear]

Try to use https://pkg.go.dev/golang.org/x/tools/cmd/deadcode. I find it useful sometimes.

[guettli]

thank you for the hint. Afaik deadcode only detect unused functions (not variables/constants/types).