PR Summary

This pull request introduces a new build pipeline for producing MUSL-based Linux binaries using Alpine, refactors the pipeline templates to support this build, and updates artifact handling to ensure correct packaging. The changes improve cross-platform support, streamline the build process for Alpine/MUSL, and ensure that the resulting native library is correctly extracted and included in the NuGet package.

Pipeline and Build System Enhancements

• Added a new LinuxMuslBuild stage to .pipelines/release.yml, which uses a dedicated Alpine-based container image and a new build template for MUSL builds. This replaces the previous approach that used the standard Linux build template for MUSL targets. [1] [2]
• Created .pipelines/templates/build-alpine.yml to define jobs for preparing the Docker build context, building the Alpine image, and extracting the libpsl-native.so binary from the built Docker image.
• Updated the build dependencies for the NuGet packaging stage to include the new LinuxMuslBuild stage, ensuring MUSL binaries are available for packaging.

Artifact and Packaging Updates

• Refactored .pipelines/templates/build-nuget.yml to consume artifacts from the new Alpine/MUSL extraction job, updating variable names and artifact paths to reflect the new pipeline structure. [1] [2]
• Added verbose logging and artifact inspection steps to improve traceability and debugging of compressed platform artifacts during packaging.

Build and Dockerfile Improvements

• Added a new Dockerfile to support building native binaries on Alpine and exporting the resulting libpsl-native.so for use in packaging.
• Improved logging in build.psm1 to provide clearer build completion messages and file listings for the generated native library.

PR Context

Build alpine native components on Alpine container