Provide binary wheels for musl-based Linux distros such as Alpine

Author: jlaine

.github/workflows/tests.yml

@@ -65,7 +65,7 @@ jobs:
           CIBW_ENVIRONMENT_MACOS: PKG_CONFIG_PATH=/tmp/vendor/lib/pkgconfig LDFLAGS=-headerpad_max_install_names
           CIBW_ENVIRONMENT_WINDOWS: INCLUDE=C:\\cibw\\vendor\\include LIB=C:\\cibw\\vendor\\lib PYAV_SKIP_TESTS=unicode_filename
           CIBW_REPAIR_WHEEL_COMMAND_WINDOWS: delvewheel repair --add-path C:\cibw\vendor\bin -w {dest_dir} {wheel}
-          CIBW_SKIP: "pp* *-musllinux*"
+          CIBW_SKIP: "pp*"
           CIBW_TEST_COMMAND: mv {project}/av {project}/av.disabled && python -m pytest {package}/tests && mv {project}/av.disabled {project}/av
           CIBW_TEST_REQUIRES: pytest numpy
           # skip tests when there are no binary wheels of numpy

CHANGELOG.rst

@@ -20,6 +20,10 @@ We are operating with `semantic versioning <https://semver.org>`_.
 v14.2.1
 -------
 
+Features:
+
+- Provide binary wheels for musl-based Linux distros such as Alpine by :gh-user:`jlaine`.
+
 Fixes:
 
 - Uses ffmpeg 7.1.1, fixes deadlocks.

scripts/fetch-vendor.py

@@ -11,7 +11,10 @@ def get_platform():
     system = platform.system()
     machine = platform.machine()
     if system == "Linux":
-        return f"manylinux_{machine}"
+        if platform.libc_ver()[0] == "glibc":
+            return f"manylinux_{machine}"
+        else:
+            return f"musllinux_{machine}"
     elif system == "Darwin":
         # cibuildwheel sets ARCHFLAGS:
         # https://github.com/pypa/cibuildwheel/blob/5255155bc57eb6224354356df648dc42e31a0028/cibuildwheel/macos.py#L207-L220