fix: hide the progress bar when start notices are off

Fixes #2

doc/cachy-auto-update.1.scd

@@ -114,7 +114,8 @@ entry: the step being performed, how many items it has got through, an overall
 percentage, and the package currently being unpacked under "Details". This is a
 job in the sense of *org.kde.JobViewServer*, the same mechanism a file manager
 uses while copying, rather than a notification. That is what makes it a bar
-instead of a line of text.
+instead of a line of text. The desktop pops it up as it opens, so it follows
+_NotifyOnStart_ and is not shown when that is off.
 
 The desktop withdraws a job as soon as the D-Bus connection that requested it
 closes, so a helper process runs inside each graphical session for the duration

res/config/cachy-auto-update.conf

@@ -107,8 +107,8 @@ RemoveOrphans=no
 # password prompt that never mentions updates. The message is withdrawn again
 # when the result arrives, so it costs one bubble, not two.
 #
-# Separate from the progress bar in the notification area, which is not
+# Also turns the progress bar in the notification area on or off. The desktop
-# optional and appears whenever the desktop supports one.
+# pops it up as it opens, so it counts as a start notice too.
 NotifyOnStart=yes
 
 # Say something after a successful update. Nothing is ever shown when there

src/lib/progress.sh

@@ -95,6 +95,8 @@ cau_progress_begin() {
 	(( CAU_PROGRESS_SCALE > 0 )) || return 0
 
 	[[ $CFG_NOTIFICATIONS == yes ]] || return 0
+	# The desktop pops the bar up as it opens, which reads as a start notice.
+	[[ $CFG_NOTIFY_START == yes ]] || return 0
 	[[ -x $CAU_PROGRESS_HELPER ]] || return 0
 	mkdir -p "$CAU_RUNDIR" 2>/dev/null || return 0