Allow deriving when distname and module name mismatch (#13)

get_version.py

@@ -16,7 +16,6 @@
 
 RE_PEP440_VERSION = re.compile(
     r"""
-v?
 (?:(?P<epoch>[0-9]+)!)?
 (?P<base>[0-9]+(?:\.[0-9]+)*)
 (?:
@@ -51,28 +50,32 @@ def working_dir(dir_: Optional[os.PathLike] = None):
         os.chdir(curdir)
 
 
-def get_version_from_dirname(name: str, parent: Path) -> Optional[str]:
+def get_version_from_dirname(parent: Path) -> Optional[str]:
     """Extracted sdist"""
     parent = parent.resolve()
-    logger.info(f"dirname: Trying to get version of {name} from dirname {parent}")
+    logger.info(f"dirname: Trying to get version from dirname {parent}")
 
-    name_re = name.replace("_", "[_-]")
-    re_dirname = re.compile(f"{name_re}-{RE_PEP440_VERSION.pattern}$", re.VERBOSE)
-    if not re_dirname.match(parent.name):
+    re_dirname = re.compile(
+        f"[A-Za-z]+(?:[_-][A-Za-z]+)*-(?P<version>{RE_PEP440_VERSION.pattern})$",
+        re.VERBOSE,
+    )
+    match = re_dirname.match(parent.name)
+    if not match:
         logger.info(
-            f"dirname: Failed; Directory name {parent.name!r} does not contain a valid version"
+            f"dirname: Failed; Directory name {parent.name!r} "
+            "does not contain a valid version"
         )
         return None
 
     logger.info("dirname: Succeeded")
-    return parent.name[len(name) + 1 :]
+    return match["version"]
 
 
 def dunamai_get_from_vcs(dir_: Path):
     from dunamai import Version
 
     with working_dir(dir_):
-        return Version.from_any_vcs(f"(?x){RE_PEP440_VERSION.pattern}")
+        return Version.from_any_vcs(f"(?x)v?{RE_PEP440_VERSION.pattern}")
 
 
 def get_version_from_vcs(parent: Path) -> Optional[str]:
@@ -158,7 +161,7 @@ def get_version(package: Union[Path, str]) -> str:
         parent = parent.parent
 
     version = (
-        get_version_from_dirname(name, parent)
+        get_version_from_dirname(parent)
         or get_version_from_vcs(parent)
         or get_version_from_metadata(name, parent)
     )

tests/test_packages.py

@@ -11,16 +11,6 @@
 TempTreeCB = Callable[[Desc], Path]
 
 
-mock_git_describe = """\
-#!/usr/bin/env python3
-import sys
-if "--show-toplevel" in sys.argv:
-    print("{}")
-else:
-    print("v0.1.2-3-gfefe123-dirty")
-"""
-
-
 @pytest.fixture(params=[True, False], ids=["src", "plain"])
 def has_src(request) -> bool:
     return request.param
@@ -70,26 +60,28 @@ def add_and_commit(msg: str):
         assert f"{version}.post1.dev0+{hash}.dirty" == v
 
 
-def test_dir(temp_tree: TempTreeCB, has_src):
-    dirname = "dir_mod-0.1.3+dirty"
+@pytest.mark.parametrize("version", ["0.1.3+dirty", "1.2.post29.dev0+41ced3e.dirty"])
+@pytest.mark.parametrize("distname", ["dir_mod", "dir-mod", "mod"])
+def test_dir(temp_tree: TempTreeCB, has_src, version, distname):
     content = {"dir_mod.py": "print('hi!')\n"}
     if has_src:
         content = dict(src=content)
+    dirname = f"{distname}-{version}"
     spec = {dirname: content}
     with temp_tree(spec) as package:
-        v = get_version.get_version_from_dirname("dir_mod", package / dirname)
-        assert "0.1.3+dirty" == v
+        v = get_version.get_version_from_dirname(package / dirname)
+        assert version == v
 
         parent = (package / dirname / "src") if has_src else (package / dirname)
         v = get_version.get_version(parent / "dir_mod.py")
-        assert "0.1.3+dirty" == v
+        assert version == v
 
 
 def test_dir_dash(temp_tree: TempTreeCB):
     dirname = "dir-two-0.1"
     spec = {dirname: {"dir_two.py": "print('hi!')\n"}}
     with temp_tree(spec) as package:
-        v = get_version.get_version_from_dirname("dir-two", package / dirname)
+        v = get_version.get_version_from_dirname(package / dirname)
         assert "0.1" == v
 
         v = get_version.get_version(package / dirname / "dir_two.py")