Fix some snap build warnings

Author: idle-code

packaging/appimage/build-appimage.sh

@@ -24,8 +24,10 @@ python -m python_appimage build app \
 APPDIR="entrypoint.py-${ARCH}"
 [ -d "${APPDIR}" ] || { echo "AppDir not found: ${APPDIR}"; exit 1; }
 
-# Install tempren (with video extras) into the AppDir's Python
-"${APPDIR}/usr/bin/python${PYTHON_VERSION}" -m pip install --quiet \
+# Install tempren (with video extras) into the AppDir's Python.
+# PYTHONNOUSERSITE=1 prevents pip from treating host ~/.local packages as
+# already satisfied and skipping their installation into the AppDir.
+PYTHONNOUSERSITE=1 "${APPDIR}/usr/bin/python${PYTHON_VERSION}" -m pip install --quiet \
     "tempren[video]==${VERSION}"
 
 # Patch AppRun to invoke tempren instead of starting a bare Python interpreter
@@ -55,6 +57,9 @@ SYSTEM_MAGIC_DB="/usr/share/misc/magic.mgc"
 sed -i '2i export LD_LIBRARY_PATH="${APPDIR}/usr/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"' \
     "${APPDIR}/AppRun"
 
+# Prevent host user site-packages from leaking into the bundled Python
+sed -i '2a export PYTHONNOUSERSITE=1' "${APPDIR}/AppRun"
+
 # Download appimagetool and pack the final AppImage
 # APPIMAGE_EXTRACT_AND_RUN avoids FUSE dependency on GitHub-hosted runners
 wget -q "https://github.com/AppImage/AppImageKit/releases/download/continuous/appimagetool-${ARCH}.AppImage" \

packaging/snap/snapcraft.yaml

@@ -4,12 +4,22 @@ summary: Template-based file renaming utility
 base: core24
 adopt-info: tempren
 source-code: https://github.com/idle-code/tempren.git
+issues: https://github.com/idle-code/tempren/issues
+website: https://github.com/idle-code/tempren
+contact: p.z.idlecode@gmail.com
+license: GPL-3.0-or-later
 description: |
   tempren is a powerful file renaming utility that uses flexible template expressions to generate names for your files.
   Tag templates can modify original filename, extract metadata from the files or anything in between.
   A rich library of built-in tags helps with working with many common file types out-of-the-box.
 grade: stable
 confinement: strict
+
+lint:
+  ignore:
+    # pymediainfo loads libmediainfo via ctypes — no ELF linkage, so the
+    # library linter cannot detect the dependency.
+    - "library:usr/lib/*/libmediainfo.so*"
 platforms:
   amd64:
   arm64:

tempren/discovery.py

@@ -74,7 +74,7 @@ def visit_types_in_package(
         except (NotImplementedError, ModuleNotFoundError) as exc:
             log.warning(f"Module {name} is currently unsupported: {exc}")
         except Exception as exc:
-            log.error(exc, f"Could not load module {name}")
+            log.error("Could not load module %s: %s", name, exc)
 
 
 def visit_types_in_module(