Add support for musllinux (#9982)

Author: liath

tests/unit/forklift/test_legacy.py

@@ -2573,6 +2573,7 @@ def test_upload_fails_without_permission(self, pyramid_config, db_request):
             "manylinux_2_17_ppc64",
             "manylinux_2_17_ppc64le",
             "manylinux_3_0_s390x",
+            "musllinux_1_1_x86_64",
             "macosx_10_6_intel",
             "macosx_10_13_x86_64",
             "macosx_11_0_x86_64",

warehouse/forklift/legacy.py

@@ -143,17 +143,18 @@ def namespace_stdlib_list(module_list):
     "11",
 }
 
-# manylinux pep600 is a little more complicated:
-_manylinux_platform_re = re.compile(r"manylinux_(\d+)_(\d+)_(?P<arch>.*)")
-_manylinux_arches = {
+# manylinux pep600 and musllinux pep656 are a little more complicated:
+_linux_platform_re = re.compile(r"(?P<libc>(many|musl))linux_(\d+)_(\d+)_(?P<arch>.*)")
+_jointlinux_arches = {
     "x86_64",
     "i686",
     "aarch64",
     "armv7l",
-    "ppc64",
     "ppc64le",
     "s390x",
 }
+_manylinux_arches = _jointlinux_arches | {"ppc64"}
+_musllinux_arches = _jointlinux_arches
 
 
 # Actual checking code;
@@ -167,9 +168,11 @@ def _valid_platform_tag(platform_tag):
         and m.group("arch") in _macosx_arches
     ):
         return True
-    m = _manylinux_platform_re.match(platform_tag)
-    if m and m.group("arch") in _manylinux_arches:
-        return True
+    m = _linux_platform_re.match(platform_tag)
+    if m and m.group("libc") == "musl":
+        return m.group("arch") in _musllinux_arches
+    if m and m.group("libc") == "many":
+        return m.group("arch") in _manylinux_arches
     return False