Use nox to test in Python 3.7+ (#73)

* use nox to test in python 3.7-3.10

* remove python 3.8+ debug syntax

* dirs_exist_ok (Python 3.8+) workaround

* python 3.8+ sqlite call

Co-authored-by: Jannis Leidel <jannis@leidel.info>

conda_index/index/convert_cache.py

@@ -154,7 +154,10 @@ def basename(path):
             return path
         return path.rsplit("/")[-1]
 
-    conn.create_function("migrate_basename", narg=1, func=basename, deterministic=True)
+    try:
+        conn.create_function("migrate_basename", narg=1, func=basename, deterministic=True)
+    except TypeError: # Python < 3.8
+        conn.create_function("migrate_basename", narg=1, func=basename)
 
     for table in TABLE_NAMES + ["stat"]:
         conn.execute(

conda_index/index/sqlitecache.py

@@ -99,7 +99,7 @@ def __init__(self, channel_root, subdir):
             os.mkdir(self.cache_dir)
 
         log.debug(
-            f"CondaIndexCache {channel_root=}, {subdir=} {self.db_filename=} {self.cache_is_brand_new=}"
+            f"CondaIndexCache channel_root={channel_root}, subdir={subdir} db_filename={self.db_filename} cache_is_brand_new={self.cache_is_brand_new}"
         )
 
     def __getstate__(self):

noxfile.py

@@ -0,0 +1,12 @@
+import nox
+
+
+@nox.session(venv_backend="conda")
+@nox.parametrize(
+    "python",
+    [(python) for python in ("3.7", "3.8", "3.9", "3.10")],
+)
+def tests(session):
+    session.conda_install("conda", "conda-build")
+    session.install("-e", ".[test]")
+    session.run("pytest")

pyproject.toml

@@ -10,7 +10,7 @@ authors = [
 license = { file = "LICENSE" }
 readme = "README.md"
 dynamic = ["version", "description"]
-requires-python = ">=3.9"
+requires-python = ">=3.7"
 dependencies = [
     "click >=8",
     "conda >=4.12.0",   # not available on pypi

tests/test_index.py

@@ -419,7 +419,17 @@ def _build_test_index(workdir):
     """
 
     # workdir may be the same during a single test run?
-    shutil.copytree(join(here, "index_hotfix_pkgs"), workdir, dirs_exist_ok=True)
+    # Python 3.7 workaround "no dirs_exist_ok flag"
+    index_hotfix_pkgs = join(here, "index_hotfix_pkgs")
+    for path in os.scandir(index_hotfix_pkgs):
+        if path.is_dir():
+            shutil.copytree(
+                join(here, "index_hotfix_pkgs", path.name), join(workdir, path.name)
+            )
+        elif path.is_file():
+            shutil.copyfile(
+                join(here, "index_hotfix_pkgs", path.name), join(workdir, path.name)
+            )
 
     with open(os.path.join(workdir, TEST_SUBDIR, "repodata.json")) as f:
         original_metadata = json.load(f)