Determine app version based on the installed package

Author: yktoo

build_package

@@ -37,9 +37,8 @@ APP_VERSION=$(sed -ne 's/\s*APP_VERSION\s*=\s*\x27\([^\x27]\+\)\x27.*/\1/p' "$SE
 echo "Building ${APP_NAME} version ${APP_VERSION} revision ${REVISION}..."
 
 # Verify the changelog contains the appropriate line
-app_ver_string="${APP_NAME} (${APP_VERSION}-${REVISION})"
-(head -n 1 "debian/changelog" | grep -q "$app_ver_string") ||
-    err "The changelog doesn't start with the entry '${app_ver_string}'"
+[[ "$(dpkg-parsechangelog -S version)" == "$APP_VERSION-$REVISION" ]] ||
+    err "The changelog doesn't start with the entry for version $APP_VERSION-$REVISION"
 
 # Initial cleanup: clean the dist dirs
 [[ ! -d "$DIST_ROOT_DIR" ]] || rm -rf "$DIST_ROOT_DIR" || err "Removing $DIST_ROOT_DIR failed"

debian/changelog

@@ -1,3 +1,9 @@
+indicator-sound-switcher (2.3.5.2-1) focal; urgency=low
+
+  * Determine app version based on the installed package
+
+ -- Dmitry Kann <[email protected]>  Sun, 27 Dec 2020 20:25:24 +0200
+
 indicator-sound-switcher (2.3.5.1-1) focal; urgency=low
 
   * No-change commit to address Launchpad failure

lib/indicator_sound_switcher/indicator.py

@@ -1,6 +1,7 @@
 import os.path
 import logging
 import time
+import pkg_resources
 
 import gi
 
@@ -24,7 +25,6 @@
 # Global definitions
 APP_ID      = 'indicator-sound-switcher'
 APP_NAME    = 'Sound Switcher Indicator'
-APP_VERSION = '2.3.5'
 APP_LICENCE = """This program is free software: you can redistribute it and/or modify it
 under the terms of the GNU General Public License version 3, as published
 by the Free Software Foundation.
@@ -37,6 +37,9 @@
 You should have received a copy of the GNU General Public License along
 with this program. If not, see http://www.gnu.org/licenses/"""
 
+# Determine app version
+APP_VERSION = pkg_resources.require(APP_ID)[0].version
+
 YESNO = {False: 'No', True: 'Yes'}
 
 CARD_NONE_SINK   = -1

setup.py

@@ -6,7 +6,7 @@
 
 
 APP_ID      = 'indicator-sound-switcher'
-APP_VERSION = '2.3.5'
+APP_VERSION = '2.3.5.2'
 
 
 def compile_lang_files() -> list: