reverse order, add test for coverage

packaging/tags.py

@@ -664,48 +664,37 @@ def _linux_platforms(is_32bit=_32_BIT_INTERPRETER):
             linux = "linux_armv7l"
     manylinux_support = []
     _, arch = linux.split("_", 1)
-    pep600_support = []
     if _have_compatible_manylinux_abi(arch):
         if arch in {"x86_64", "i686", "aarch64", "armv7l", "ppc64", "ppc64le", "s390x"}:
-            manylinux_support.append(
-                ("manylinux2014", (2, 17))
-            )  # CentOS 7 w/ glibc 2.17 (PEP 599)
-            if arch in ("x86_64", "i686"):
+            # CentOS 7 w/ glibc 2.17 (PEP 599)
+            map_glibc_to_manylinux = {(2, 17): "manylinux2014"}
+            if arch in {"x86_64", "i686"}:
+                # CentOS 6 w/ glibc 2.12 (PEP 571)
+                map_glibc_to_manylinux[(2, 12)] = "manylinux2010"
+                # CentOS 5 w/ glibc 2.5 (PEP 513)
+                map_glibc_to_manylinux[(2, 5)] = "manylinux1"
                 # glibc in manylinux1 is 2.5
-                min_minor = 5
+                min_minor = 4
             else:
-                # glibc in manylinux2014 is 2.5
-                min_minor = 17
+                # glibc in manylinux2014 is 2.17
+                min_minor = 16
             cur_glibc = _get_glibc_version()
-            for glibc_minor in range(min_minor, cur_glibc[1]):
+            for glibc_minor in range(cur_glibc[1], min_minor, -1):
                 if _have_compatible_glibc(2, glibc_minor):
-                    pep600_support.append(
-                        (
-                            "manylinux_2_{}_{}".format(glibc_minor, arch),
-                            (2, glibc_minor),
-                        )
+                    manylinux_support.append(
+                        ("manylinux_2_{}".format(glibc_minor), (2, glibc_minor))
+                    )
+                if (2, glibc_minor) in map_glibc_to_manylinux:
+                    manylinux_support.append(
+                        (map_glibc_to_manylinux[(2, glibc_minor)], (2, glibc_minor))
                     )
-                else:
-                    # no need to keep incrementing
-                    break
-        if arch in {"x86_64", "i686"}:
-            manylinux_support.append(
-                ("manylinux2010", (2, 12))
-            )  # CentOS 6 w/ glibc 2.12 (PEP 571)
-            manylinux_support.append(
-                ("manylinux1", (2, 5))
-            )  # CentOS 5 w/ glibc 2.5 (PEP 513)
     manylinux_support_iter = iter(manylinux_support)
     for name, glibc_version in manylinux_support_iter:
         if _is_manylinux_compatible(name, glibc_version):
             yield linux.replace("linux", name)
             break
-    # Support for a later manylinux implies support for an earlier version.
     for name, _ in manylinux_support_iter:
         yield linux.replace("linux", name)
-    for name, glibc_verison in iter(pep600_support):
-        if _is_manylinux_compatible(name, glibc_version):
-            yield name
     yield linux
 
 

tests/test_tags.py

@@ -373,6 +373,13 @@ def test_glibc_version_string_confstr(self, monkeypatch):
         monkeypatch.setattr(os, "confstr", lambda x: "glibc 2.20", raising=False)
         assert tags._glibc_version_string_confstr() == "2.20"
 
+    def test_glibc_version_string_fail(self, monkeypatch):
+        monkeypatch.setattr(os, "confstr", lambda x: None, raising=False)
+        monkeypatch.setitem(sys.modules, "ctypes", None)
+        assert tags._glibc_version_string() is None
+        assert tags._have_compatible_glibc(2, 5) is False
+        assert tags._get_glibc_version() == (-1, -1)
+
     @pytest.mark.parametrize(
         "failure",
         [pretend.raiser(ValueError), pretend.raiser(OSError), lambda x: "XXX"],
@@ -463,7 +470,18 @@ def test_linux_platforms_manylinux2010(self, is_x86, monkeypatch):
             monkeypatch.setattr(platform, "machine", lambda: "x86_64")
         platforms = list(tags._linux_platforms(is_32bit=False))
         arch = platform.machine()
-        expected = ["manylinux2010_" + arch, "manylinux1_" + arch, "linux_" + arch]
+        expected = [
+            "manylinux2010_" + arch,
+            "manylinux_2_11_" + arch,
+            "manylinux_2_10_" + arch,
+            "manylinux_2_9_" + arch,
+            "manylinux_2_8_" + arch,
+            "manylinux_2_7_" + arch,
+            "manylinux_2_6_" + arch,
+            "manylinux_2_5_" + arch,
+            "manylinux1_" + arch,
+            "linux_" + arch,
+        ]
         assert platforms == expected
 
     def test_linux_platforms_manylinux2014(self, is_x86, monkeypatch):
@@ -477,7 +495,19 @@ def test_linux_platforms_manylinux2014(self, is_x86, monkeypatch):
         arch = platform.machine()
         expected = [
             "manylinux2014_" + arch,
+            "manylinux_2_16_" + arch,
+            "manylinux_2_15_" + arch,
+            "manylinux_2_14_" + arch,
+            "manylinux_2_13_" + arch,
+            "manylinux_2_12_" + arch,
             "manylinux2010_" + arch,
+            "manylinux_2_11_" + arch,
+            "manylinux_2_10_" + arch,
+            "manylinux_2_9_" + arch,
+            "manylinux_2_8_" + arch,
+            "manylinux_2_7_" + arch,
+            "manylinux_2_6_" + arch,
+            "manylinux_2_5_" + arch,
             "manylinux1_" + arch,
             "linux_" + arch,
         ]
@@ -511,8 +541,21 @@ def test_linux_platforms_manylinux2014_i386_abi(self, monkeypatch):
         )
         platforms = list(tags._linux_platforms(is_32bit=True))
         expected = [
+            # "manylinux_2_17_i686",  # rejected since it comes before maylinux2014
             "manylinux2014_i686",
+            "manylinux_2_16_i686",
+            "manylinux_2_15_i686",
+            "manylinux_2_14_i686",
+            "manylinux_2_13_i686",
+            "manylinux_2_12_i686",
             "manylinux2010_i686",
+            "manylinux_2_11_i686",
+            "manylinux_2_10_i686",
+            "manylinux_2_9_i686",
+            "manylinux_2_8_i686",
+            "manylinux_2_7_i686",
+            "manylinux_2_6_i686",
+            "manylinux_2_5_i686",
             "manylinux1_i686",
             "linux_i686",
         ]