How do I get dialyzer to ignore certain unexported functions?

2018-06-27 05:07:37

I'm using lager to do my logging; it has a parser transform which converts lager:warn/1 , etc. functions into lager:trace... functions.

dialyzer doesn't process the parser transform, so it warns with Call to missing or unexported function lager:warn/1 .

How do I tell it that this function does exist, and not to warn about it?

最好的办法是让dialyzer查看你的编译束文件，只要在编译代码时应用解析变换，并且在你的.plt文件中包含lager就可以了

Stumbled upon a way by checking out what's done in the meck project's Makefile regarding dialyzer. Have a look: Makefile
Key part is this:

| 
    fgrep -v -f ./dialyzer.ignore-warnings

So within that file: dialyzer.ignore-warnings you'll see what to do. In my version I added:

Call to missing or unexported function lager:warning/1
Call to missing or unexported function lager:warning/2
Call to missing or unexported function lager:info/1
Call to missing or unexported function lager:info/2
Call to missing or unexported function lager:error/1
Call to missing or unexported function lager:error/2

And the warnings I was getting went away. I do of course have this entry in my rebar.config:

{erl_opts, [{parse_transform, lager_transform}]}.

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