why building RCall.jl failed during the registration of an package

[szcf-weiya]

I am struggling with an error in the AutoMege step when registering my package that depends on RCall.jl. Here is the pull request on the General repo and the action log info.

https://github.com/JuliaRegistries/General/pull/86838 https://github.com/JuliaRegistries/General/actions/runs/5464785321/jobs/9947294633?pr=86838

According to the action log info, it failed during the build of RCall.jl

It confused me that it tries to install a conda R. If I understand correctly, the conda R procedure is only triggered when R_HOME is set to be *,

https://github.com/JuliaInterop/RCall.jl/blob/2df5ef814047f27009df3dc293ba81ec195359c3/deps/build.jl#L27-L37

However, I did not set the env in my package. And I also check the last GitHub action log of RCall.jl in the AutoMerge step,

https://github.com/JuliaRegistries/General/actions/runs/4701731245/jobs/8338139220

Note that it did not print out Info: Installing R via Conda..., so it indeed did not try to install a Conda R, right?

So my question is why it tried to install a conda R during my registration. Am I missing something? Thanks!

[szcf-weiya]

Just found R_HOME=* is defined in the RegistryCI.jl

https://github.com/JuliaRegistries/RegistryCI.jl/blob/a20db2707b49acbff27c382e8acdf775a47bdc97/src/AutoMerge/guidelines.jl#L895

[szcf-weiya]

proposed a solution https://github.com/JuliaPy/Conda.jl/pull/243