From 1bf9d1740d0b6ef6ac7236ba47de8f793b050bab Mon Sep 17 00:00:00 2001
From: Bryan Gardiner <bog@khumba.net>
Date: Fri, 17 Mar 2023 21:16:02 -0700
Subject: [PATCH] Fix reference to undefined variable (issue #12), and fix some
 lint.

---
 CHANGELOG.md | 3 +++
 src/nvd      | 5 ++---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 542db60..edc18e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## 0.2.1 (unreleased)
 
+- Fixed reference to undefined variable in `StorePath` constructor (issue #12),
+  plus some code lint.
+
 ## 0.2.0 (2022-10-15)
 
 - Add display of the change in closure disk size (issue #8).
diff --git a/src/nvd b/src/nvd
index 4caf646..0ea999e 100755
--- a/src/nvd
+++ b/src/nvd
@@ -43,7 +43,6 @@ import os.path
 import re
 import subprocess
 import sys
-from collections import namedtuple
 from pathlib import Path
 from signal import SIGPIPE, SIG_DFL, signal
 from subprocess import PIPE
@@ -103,7 +102,7 @@ def raise_arg(e):
 class StorePath:
     def __init__(self, path: Union[str, Path]):
         assert str(path).startswith("/nix/store/"), \
-            f"Doesn't start with /nix/store/: {str(resolved)!r}"
+            f"Doesn't start with /nix/store/: {str(path)!r}"
         self._path = Path(path)
 
     def __str__(self) -> str:
@@ -348,7 +347,7 @@ def render_versions(version_list: List[str], *, colour: bool = False) -> str:
             version_list.pop()
             count += 1
 
-        if version == None:
+        if version is None:
             version = "<none>"
         elif colour:  # (Don't apply colour to <none>.)
             version = sgr(SGR_FG + SGR_YELLOW) + version + sgr(SGR_RESET)