pre-commit: Update all hook versions and apply fixes

Vermin 1.6.0 was recently released, which contains a fix for
netromdk/vermin#230. This was a rather odd corner case, in which Vermin
would fail when code was compatible with 2.x and 3.x, yet the command
line only required compatibility with 3.x. Since pre-commit runs against
only files that changed, this was possible, for example with small test
files. I'm not sure if I encountered it in drgn (I know I did with
drgn-tools), but it's good to have the fix.

I used pre-commit autoupdate, so we have the latest version of each hook
now. In particular, this commit surpasses mypy 0.971, which is the last
version to support Python 3.6 at runtime. Mypy still supports targeting
Python 3.6[1].

[1]: https://mypy-lang.blogspot.com/2022/07/mypy-0971-released.html

Two new errors were surfaced with the new hooks:

1. Mypy complained about the pattern "os.exit(exception)". I've replaced
   these so they explicitly use str: "os.exit(str(exception))".

drgn/cli.py:283: error: Argument 1 to "exit" has incompatible type "OSError"; expected "str | int | None"  [arg-type]

2. Vermin complained that "int.is_integer()" was introduced 3.12. I
   surmised that it was unable to infer that its usage was guaranteed to
   be against a float, and the reason was due to the division operation
   against an integer. I changed the integer literal to a float literal,
   which resolved the issue.

!2, 3.12     drgn/helpers/common/format.py
  'int.is_integer' member requires !2, 3.12

Signed-off-by: Stephen Brennan <stephen.s.brennan@oracle.com>

.pre-commit-config.yaml

@@ -6,15 +6,15 @@ repos:
     -   id: isort
         name: isort (python)
 -   repo: https://github.com/psf/black
-    rev: 23.10.1
+    rev: 23.11.0
     hooks:
     -   id: black
 -   repo: https://github.com/pycqa/flake8
     rev: 6.1.0
     hooks:
     -   id: flake8
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.931
+    rev: v1.7.1
     hooks:
     -   id: mypy
         args: [--show-error-codes, --strict, --no-warn-return-any, --no-warn-unused-ignores]
@@ -31,7 +31,7 @@ repos:
     -   id: debug-statements
     -   id: check-merge-conflict
 -   repo: https://github.com/netromdk/vermin
-    rev: v1.5.2
+    rev: v1.6.0
     hooks:
     -   id: vermin
         # The vmtest package in general should adhere to the same version

drgn/cli.py

@@ -240,7 +240,7 @@ def _main() -> None:
         try:
             script_type = _identify_script(args.script[0])
         except OSError as e:
-            sys.exit(e)
+            sys.exit(str(e))
         if script_type == "core":
             sys.exit(
                 f"error: {args.script[0]} is a core dump\n"
@@ -280,7 +280,7 @@ def _main() -> None:
                 else:
                     prog.set_core_dump(open_via_sudo("/proc/kcore", os.O_RDONLY))
     except OSError as e:
-        sys.exit(e)
+        sys.exit(str(e))
     except ValueError as e:
         # E.g., "not an ELF core file"
         sys.exit(f"error: {e}")

drgn/helpers/common/format.py

@@ -232,7 +232,7 @@ def number_in_binary_units(n: SupportsFloat, precision: int = 1) -> str:
     for prefix in ("", "K", "M", "G", "T", "P", "E", "Z"):
         if abs(n) < 1024:
             break
-        n /= 1024
+        n /= 1024.0
     else:
         prefix = "Y"
     if n.is_integer():