Add recipe for librerun-sdk (C++ bindings of rerun Rust library)

[traversaro]

This package adds the C++ bindings for the Rerun rust package (https://www.rerun.io/). The Python bindings for the same package is already packaged in conda-forge as rerun-sdk. We originally tried to add this as a new output to the existing rerun-sdk-feedstock, but that turned out to be unfeasible, as it created a huge (but unnecessary) build matrix (see conda-forge/rerun-sdk-feedstock#30 (comment)). So we decided to try to package this as it own package.

At the moment, I am skipping the Windows build as currently the upstream Windows library can't be compiled as shared. I want to open an upstream issue to discuss how to fix this, but in the meanwhile I think we can proceed in reviewing this for Linux and macOS.

I am not totally sold on the name. The pair lib<name> and <name> or <name>-python is typically used for a base C/C++ library (called lib<name>) and its Python bindings (<name> or <name>-python). The situation here is a bit different, as these are the C++ bindings . However, I do not a strong opinion on this. @h-vetinari I vaguely recall (but I may be wrong) you cared a lot about the all lib<name> naming scheme, any opinion on this case?

Checklist

• Title of this PR is meaningful: e.g. "Adding my_nifty_package", not "updated meta.yaml".
• License file is packaged (see here for an example).
• Source is from official source.
• Package does not vendor other packages. (If a package uses the source of another package, they should be separate packages or the licenses of all packages need to be packaged).
• If static libraries are linked in, the license of the static library is packaged.
• Package does not ship static libraries. If static libraries are needed, follow CFEP-18.
• Build number is 0.
• A tarball (url) rather than a repo (e.g. git_url) is used in your recipe (see here for more details).
• GitHub users listed in the maintainer section have posted a comment confirming they are willing to be listed there.
• When in trouble, please check our knowledge base documentation before pinging a team.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes/librerun-sdk) and found some lint.

Here's what I've got...

For recipes/librerun-sdk:

• pin_compatible should be used instead of pin_subpackage for cxx_name because it is not a known output of this recipe: ['librerun-sdk'].

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/librerun-sdk) and found it was in an excellent condition.

[traversaro]

Ok, the recipe is ready for review. Note that I modified the original description of the PR with additional information, so if you read it in the past please read it again, thanks!

@conda-forge/staged-recipes @conda-forge/help-c-cpp @conda-forge/help-rust @conda-forge/rerun-sdk

[github-actions]

To help direct your pull request to the best reviewers, please mention a topic-specifc team if your recipe matches any of the following: conda-forge/help-c-cpp, conda-forge/help-cdts, conda-forge/help-go, conda-forge/help-java, conda-forge/help-julia, conda-forge/help-nodejs, conda-forge/help-perl, conda-forge/help-python, conda-forge/help-python-c, conda-forge/help-r, conda-forge/help-ruby,or conda-forge/help-rust. Thanks!

[carterbox]

I have thoughts about conda-forge/rerun-sdk-feedstock#30, which I will write there.

I agree that a separate feedstock is the best option because apparently conda-smithy cannot handle logic like:

skip: True  # [(name=="librerun-sdk") and (py!=310)]

Which would allow building cxx and python variants from the same feedstock.

[carterbox]

I am not totally sold on the name. The pair lib and or -python is typically used for a base C/C++ library (called lib) and its Python bindings ( or -python). The situation here is a bit different, as these are the C++ bindings . However, I do not a strong opinion on this. @h-vetinari I vaguely recall (but I may be wrong) you cared a lot about the all lib naming scheme, any opinion on this case?

librerun-sdk is the correct name because it provides librerun-sdk.so.

[traversaro]

Ah, I forgot, @conda-forge/rerun-sdk if you are interested in being added as maintainers in the feedstock feel free to comment in the following, thanks!

[jleibs]

Ah, I forgot, @conda-forge/rerun-sdk if you are interested in being added as maintainers in the feedstock feel free to comment in the following, thanks!

Yes, happy to be a maintainer so I can help shepherd through incremental rerun releases.

[traversaro]

Ah, I forgot, @conda-forge/rerun-sdk if you are interested in being added as maintainers in the feedstock feel free to comment in the following, thanks!

Yes, happy to be a maintainer so I can help shepherd through incremental rerun releases.

Thanks! Done in 1af8abf .

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes/librerun-sdk) and found some lint.

Here's what I've got...

For recipes/librerun-sdk:

• There are 1 too many lines. There should be one empty line at the end of the file.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/librerun-sdk) and found it was in an excellent condition.

[traversaro]

Thanks @xhochy for the feedback, I applied the suggestions you made.

[traversaro]

Interesting, changing - rust to - {{ compiler('rust') }} triggers a failure:

[307/532] Linking CXX shared library rerun_cpp/librerun_sdk.so
FAILED: rerun_cpp/librerun_sdk.so 
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$PREFIX/lib/libarrow.so.1200.1.0  -lm -ldl -pthread && :
$BUILD_PREFIX/bin/../lib/gcc/x86_64-conda-linux-gnu/12.3.0/../../../../x86_64-conda-linux-gnu/bin/ld: cannot find $SRC_DIR/crates/rerun_c/../../target/release/librerun_c.a: No such file or directory
collect2: error: ld returned 1 exit status

[traversaro]

The difference with - {{ compiler('rust') }} is that the package rust_linux-64 is also installed, and the librerun_c.a library is placed in $SRC_DIR/crates/rerun_c/../../target/x86_64-unknown-linux-gnu/release/librerun_c.a instead of $SRC_DIR/crates/rerun_c/../../target/release/librerun_c.a as assumed by CMake.