_initappimage in site.py

python_appimage/data/apprun.sh

@@ -1,9 +1,16 @@
 {{ shebang }}
 
-# Export APPRUN if running from an extracted image
-self="$(readlink -f -- $0)"
-here="${self%/*}"
-APPDIR="${APPDIR:-${here}}"
+# If running from an extracted image, then export ARGV0 and APPDIR
+if [ -z "${APPIMAGE}" ]; then
+    export ARGV0=$0
+
+    self="$(readlink -f -- $0)"
+    here="${self%/*}"
+    export APPDIR="${APPDIR:-${here}}"
+fi
+
+# Resolve the calling command (preserving symbolic links).
+export APPIMAGE_COMMAND="$(command -v -- $ARGV0)"
 {{ tcltk-env }}
 {{ cert-file }}