Support for python3.7 and python3.8

Added tox targets as well

pseudo_builder.py

@@ -2,6 +2,8 @@
 This builder functions as a pseudo builder that instead downloads and installs a binary file using
 release-gitter based on a pyproject.toml file. It's a total hack...
 """
+from __future__ import annotations
+
 from pathlib import Path
 from shutil import copytree
 from shutil import move

release_gitter.py

@@ -1,4 +1,6 @@
 #! /usr/bin/env python3
+from __future__ import annotations
+
 import argparse
 import platform
 from collections.abc import Sequence
@@ -91,7 +93,14 @@ def parse_git_remote(git_url: Optional[str] = None) -> GitRemoteInfo:
             f"{path[1:3]} Could not parse owner and repo from URL {git_url}"
         )
 
-    return GitRemoteInfo(u.hostname, path[1], path[2].removesuffix(".git"))
+    repo = path[2]
+    try:
+        repo = repo.removesuffix(".git")  # type: ignore
+    except AttributeError:
+        # Py < 3.9
+        repo = repo[: -len(".git")] if repo and repo.endswith(".git") else repo
+
+    return GitRemoteInfo(u.hostname, path[1], repo)
 
 
 def parse_cargo_version(p: Path) -> str:

release_gitter_test.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import unittest
 from pathlib import Path
 from typing import Any
@@ -111,27 +113,23 @@ class TestVersionInfo(unittest.TestCase):
             version = release_gitter.read_version()
             self.assertIsNone(version)
 
-    def test_cargo_file_has_version(self):
-        with (
-            patch("pathlib.Path.exists", return_value=True),
-            patch(
-                "pathlib.Path.open",
-                mock_open(read_data="\n".join(["[package]", 'version = "1.0.0"'])),
-            ),
-        ):
-            version = release_gitter.read_version()
-            self.assertEqual(version, "1.0.0")
+    @patch("pathlib.Path.exists", return_value=True)
+    @patch(
+        "pathlib.Path.open",
+        mock_open(read_data="\n".join(["[package]", 'version = "1.0.0"'])),
+    )
+    def test_cargo_file_has_version(self, *_):
+        version = release_gitter.read_version()
+        self.assertEqual(version, "1.0.0")
 
-    def test_cargo_file_missing_version(self):
-        with (
-            patch("pathlib.Path.exists", return_value=True),
-            patch(
-                "pathlib.Path.open",
-                mock_open(read_data="\n".join(["[package]"])),
-            ),
-        ):
-            with self.assertRaises(ValueError):
-                release_gitter.read_version()
+    @patch("pathlib.Path.exists", return_value=True)
+    @patch(
+        "pathlib.Path.open",
+        mock_open(read_data="\n".join(["[package]"])),
+    )
+    def test_cargo_file_missing_version(self, *_):
+        with self.assertRaises(ValueError):
+            release_gitter.read_version()
 
 
 if __name__ == "__main__":

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py3
+envlist = py3,py37,py38,py39
 
 [testenv]
 deps =