Add initial version of bash autocomplete

Author: Bakhtiyar Farayev

completion/task.bash

@@ -0,0 +1,21 @@
+_task_completion()
+{
+  local scripts;
+  local curr_arg;
+
+  # Remove colon from work breaks
+  COMP_WORDBREAKS=${COMP_WORDBREAKS//:}
+
+  scripts=$(task -l | sed '1d' | sed 's/^\* //' | awk '{ print $1 }');
+
+  curr_arg="${COMP_WORDS[COMP_CWORD]:-"."}"
+
+  # Do not accept more than 1 argument
+  if [ "${#COMP_WORDS[@]}" != "2" ]; then
+    return
+  fi
+
+  COMPREPLY=($(compgen -c | echo "$scripts" | grep $curr_arg));
+}
+
+complete -F _task_completion task