taskwarrior: Make auto-sync script silent

Now silently syncs in the background instead of blocking input. *May*
produce zombie processes in rare circumstances? Will need to investigate
it some more.

Behind the scenes, the shell script has been replaced by a python script
which creates a (disowned) background process which attempts the
syncing.

taskwarrior/.local/share/task/hooks/on-exit.sync-to-server-silent.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+
+# From: https://gist.github.com/varunagrawal/2b93c5dc721520ff6876e940c420ab05
+# This hooks script syncs task warrior to the configured task server.
+# The on-exit event is triggered once, after all processing is complete.
+
+# Make sure hooks are enabled and this hook script is executable.
+# Run `task diag` for diagnostics on the hook.
+
+import sys
+import json
+import subprocess
+
+try:
+    tasks = json.loads(sys.stdin.readline())
+except:
+    # No input
+    sys.exit(0)
+
+# no tasks to work through, don't error
+if len(tasks) <= 0:
+    sys.exit(0)
+
+# Call the `sync` command
+# hooks=0 ensures that the sync command doesn't call the on-exit hook
+# verbose=nothing sets the verbosity to print nothing at all
+subprocess.Popen(["task", "rc.verbose=nothing", "rc.hooks=0", "sync"], close_fds=True)
+
+sys.exit(0)

taskwarrior/.local/share/task/hooks/on-exit.sync-to-server.sh

@@ -1,16 +0,0 @@
-#!/usr/bin/env sh
-# This hooks script syncs task warrior to the configured task server.
-# The on-exit event is triggered once, after all processing is complete.
-
-# Make sure hooks are enabled
-
-# Count the number of tasks modified
-n=0
-while read -r REPLY; do
-    n=$((n + 1))
-done
-
-if [ $n -gt 0 ]; then
-    SAVELOC="${XDG_DATA_HOME}/task"
-    task sync >>"${SAVELOC:-~/.task}/sync_hook.log" &
-fi