build(debian): offline pip dependency installation

debian/navidrome-uploader.install

@@ -6,4 +6,4 @@ templates/* opt/navidrome-uploader/templates/
 static/css/* opt/navidrome-uploader/static/css/
 static/js/* opt/navidrome-uploader/static/js/
 contrib/navidrome-uploader.service lib/systemd/system/navidrome-uploader.service
-
+debian/wheels/* opt/navidrome-uploader/wheels/

debian/navidrome-uploader.postinst

@@ -10,8 +10,8 @@ case "$1" in
     chown -R "$APP_USER:$APP_USER" "$APP_DIR"
 
     runuser -u "$APP_USER" -- python3 -m venv "$VENV_DIR"
-    runuser -u "$APP_USER" -- "$VENV_DIR/bin/pip" install --no-cache-dir --upgrade pip
-    runuser -u "$APP_USER" -- "$VENV_DIR/bin/pip" install --no-cache-dir -r "$APP_DIR/requirements.txt"
+
+    runuser -u "$APP_USER" -- "$VENV_DIR/bin/pip" install --no-cache-dir --no-index --find-links="$APP_DIR/wheels" -r "$APP_DIR/requirements.txt"
 
     if command -v systemctl >/dev/null 2>&1; then
       systemctl daemon-reload || true

debian/rules

@@ -3,6 +3,11 @@
 %:
 	dh $@
 
+override_dh_auto_build:
+	dh_auto_build
+	mkdir -p debian/wheels
+	pip wheel --no-cache-dir -r requirements.txt pip -w debian/wheels
+
 override_dh_install:
 	dh_install
 	install -d debian/navidrome-uploader/etc/default/navidrome-uploader