libwebp: relocatable shared lib on macOS + modernize

[SpaceIm]

see conan-io/hooks#376

---

• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the
  conan-center hook activated.

[ghost]

I detected other pull requests that are modifying libwebp/all recipe:

• libwebp: add version 1.2.2 #9077

This message is automatically generated by https://github.com/ericLemanissier/conan-center-conflicting-prs so don't hesitate to report issues/improvements there.

[prince-chrismc]

😖

conan test conan-center-index/recipes/libwebp/all/test_package/conanfile.py libwebp/1.2.2@ --profile=/Users/jenkins/w/BuildSingleReference/78257/d92a02be-9c85-4288-8737-60d279a475af/profile.txt

libwebp/1.2.2: Retrieving package 859f8116a362ef830363626989ec41f658f4e574 from remote 'c3i_PR-9036' 
ERROR: Binary package not found: 'libwebp/1.2.2:859f8116a362ef830363626989ec41f658f4e574'

[SpaceIm]

Installing (downloading, building) binaries...
libwebp/1.2.2: Retrieving package 859f8116a362ef830363626989ec41f658f4e574 from remote 'c3i_PR-9036' 
ERROR: Binary package not found: 'libwebp/1.2.2:859f8116a362ef830363626989ec41f658f4e574'

@jgsogo Any idea on this one? test package fails to retrieve the package.

[jgsogo]

If it is a dependency of the test_package/conanfile.py it's probably this same issue: #9089 (comment)

I'll try to bypass it with the tools we have currently (it might work), if not, I'm preparing some changes to be deployed soon

It doesn't look like the same, sorry, I read conan test and thought about it. Let me have a closer look.

[conan-center-bot]

All green in build 17 (a37e2f26f5cf65c88782473296a8c6adf230083e):

• libwebp/1.2.1@:
  All packages built successfully! (All logs)

• libwebp/1.2.2@:
  All packages built successfully! (All logs)

• libwebp/1.2.0@:
  All packages built successfully! (All logs)

• libwebp/1.1.0@:
  All packages built successfully! (All logs)

• libwebp/1.0.3@:
  All packages built successfully! (All logs)

[jgsogo]

Here the problem was a wrong package (incomplete one) uploaded to Artifactory, the conanmanifest.txt file was missing. We have requested Artifactory team to provide some kind of atomic uploads for Conan packages, but still the feature is in the backlog. While this is developed, Conan packages can face this issue in concurrent scenarios.

[prince-chrismc]

The merge commit persevered our approvals but the bot only looks at the head commit

This needs one more uilianries review is not being counted according to my bot 😢

[uilianries]

let's try to recount