maintenance: drop support for EOL Python 3.8

.github/workflows/pipelines.yml

@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
     - uses: actions/checkout@v4
@@ -63,7 +63,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
     - uses: actions/checkout@v4
@@ -93,7 +93,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
     - uses: actions/checkout@v4
@@ -122,7 +122,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5

backend/wheel.py

@@ -170,9 +170,10 @@ def package_record(self):
         zinfo.compress_type = ZIP_DEFLATED
 
         self.records.append((str(dist_info_record), "", ""))
-        with self._zipfile.open(zinfo, "w") as f, TextIOWrapper(
-            f, encoding="utf-8", newline=""
-        ) as csvf:
+        with (
+            self._zipfile.open(zinfo, "w") as f,
+            TextIOWrapper(f, encoding="utf-8", newline="") as csvf,
+        ):
             writer = csv.writer(csvf, lineterminator="\n")
             writer.writerows(self.records)
 

pyproject.toml

@@ -2,7 +2,7 @@
 name = "pyproject-installer"
 description = "Pyproject installer"
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 license = {text = "MIT"}
 authors = [
   {name = "Stanislav Levin", email = "[email protected]"},
@@ -15,7 +15,6 @@ classifiers = [
     "Operating System :: Unix",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",

src/pyproject_installer/build_cmd/_build.py

@@ -116,39 +116,37 @@ def build_metadata(srcdir, outdir, config=None, verbose=False):
 
     hook = "prepare_metadata_for_build_wheel"
     logger.info("Building metadata with %s", hook)
-    with build_out_tmpdir(srcdir, hook, config, verbose) as (
-        distinfo_dir,
-        tmp_path,
+    with (
+        build_out_tmpdir(srcdir, hook, config, verbose) as (
+            distinfo_dir,
+            tmp_path,
+        ),
     ):
         if distinfo_dir:
             metadata_path_src = tmp_path / distinfo_dir / metadata_filename
-            # Python 3.8 syntax
-            with metadata_path_src.open(
-                mode="rb"
-            ) as fsrc, metadata_path_dest.open(mode="wb") as fdst:
+            with (
+                metadata_path_src.open(mode="rb") as fsrc,
+                metadata_path_dest.open(mode="wb") as fdst,
+            ):
                 shutil.copyfileobj(fsrc, fdst)
             return metadata_filename
 
     # backend doesn't support optional prepare_metadata_for_build_wheel
     # fallback to build_wheel
     hook = "build_wheel"
     logger.info("Fallback to building metadata with %s", hook)
-    with build_out_tmpdir(srcdir, hook, config, verbose) as (
-        wheel_filename,
-        tmp_path,
+    with (
+        build_out_tmpdir(srcdir, hook, config, verbose) as (
+            wheel_filename,
+            tmp_path,
+        ),
     ):
         wheel_path = tmp_path / wheel_filename
         with WheelFile(wheel_path) as whl:
             metadata_path_src = whl.dist_info / metadata_filename
-            if sys.version_info > (3, 9):
-                # Python3.9: zipfile.Path.open opens in text mode by default
-                mode = "rb"
-            else:
-                # Python3.8: zipfile.Path.open supports only binary mode
-                mode = "r"
-            # Python 3.8 syntax
-            with metadata_path_src.open(
-                mode=mode
-            ) as fsrc, metadata_path_dest.open(mode="wb") as fdst:
+            with (
+                metadata_path_src.open(mode="rb") as fsrc,
+                metadata_path_dest.open(mode="wb") as fdst,
+            ):
                 shutil.copyfileobj(fsrc, fdst)
     return metadata_filename

src/pyproject_installer/lib/entry_points.py

@@ -1,7 +1,6 @@
 def parse_entry_points(distr, group):
     """
     Compat only.
-    - module and attr attributes of ep are available since Python 3.9
     - "selectable" entry points were introduced in Python 3.10
     """
     distr_eps = distr.entry_points
@@ -13,18 +12,4 @@ def parse_entry_points(distr, group):
     else:
         eps = distr_eps.select(group=group)
 
-    for ep in eps:
-        try:
-            # module is available since Python 3.9
-            ep_module = ep.module
-        except AttributeError:
-            ep_match = ep.pattern.match(ep.value)
-            ep_module = ep_match.group("module")
-
-        try:
-            # attr is available since Python 3.9
-            ep_attr = ep.attr
-        except AttributeError:
-            ep_attr = ep_match.group("attr")
-
-        yield (ep.name, ep.value, ep_module, ep_attr)
+    yield from ((ep.name, ep.value, ep.module, ep.attr) for ep in eps)

src/pyproject_installer/lib/wheel.py

@@ -7,7 +7,6 @@
 import csv
 import hashlib
 import logging
-import sys
 
 from ..errors import WheelFileError
 from .entry_points import parse_entry_points
@@ -151,16 +150,10 @@ def validate_record(self):
         record_path = self.dist_info / "RECORD"
         recorded_files = set()
 
-        if sys.version_info > (3, 9):
-            # since Python3.9 zipfile.Path.open opens in text mode by default
-            mode = "rb"
-        else:
-            # while Python3.8 zipfile.Path.open supports only binary mode
-            mode = "r"
-
-        with record_path.open(mode=mode) as csvbf, TextIOWrapper(
-            csvbf, encoding="utf-8", newline=""
-        ) as csvf:
+        with (
+            record_path.open(mode="rb") as csvbf,
+            TextIOWrapper(csvbf, encoding="utf-8", newline="") as csvf,
+        ):
             reader = csv.reader(csvf)
             for row in reader:
                 # path, hash and size

src/pyproject_installer/run_cmd/_run_env.py

@@ -33,19 +33,13 @@ def __init__(self, wheel):
             "clear": True,
             "upgrade": False,
             "with_pip": False,
+            "upgrade_deps": False,
         }
-        if sys.version_info > (3, 9):
-            # New in version 3.9: Added the upgrade_deps parameter
-            venv_kwargs["upgrade_deps"] = False
         super().__init__(**venv_kwargs)
 
     def ensure_directories(self, *args, **kwargs):
         # save context for reusage
         self.context = super().ensure_directories(*args, **kwargs)
-        # env_exec_cmd requires Python3.9+ (https://bugs.python.org/issue45337),
-        # for non-windows systems: context.env_exec_cmd = context.env_exe
-        if not hasattr(self.context, "env_exec_cmd"):
-            self.context.env_exec_cmd = self.context.env_exe
         return self.context
 
     def install_console_scripts(self, context):

tests/conftest.py

@@ -75,9 +75,10 @@ def update_record(self):
             self.record = ws.getvalue()
 
     def drop_from_record(self, file):
-        with StringIO(self.record, newline="") as rs, StringIO(
-            newline=""
-        ) as ws:
+        with (
+            StringIO(self.record, newline="") as rs,
+            StringIO(newline="") as ws,
+        ):
             reader = csv.reader(rs)
             writer = csv.writer(ws, lineterminator="\n")
             for row in reader:

tests/integration/conftest.py

@@ -21,10 +21,6 @@ def __init__(self, *args, **kwargs):
     def ensure_directories(self, *args, **kwargs):
         # save context for reusage
         self.context = super().ensure_directories(*args, **kwargs)
-        # env_exec_cmd requires Python3.9+ (https://bugs.python.org/issue45337),
-        # for non-windows systems: context.env_exec_cmd = context.env_exe
-        if not hasattr(self.context, "env_exec_cmd"):
-            self.context.env_exec_cmd = self.context.env_exe
         return self.context