Initial commit of zsh completion, completes only subcommands right now.

Signed-off-by: Paul Beckingham <paul@beckingham.net>

completion/_task

@@ -0,0 +1,32 @@
+#compdef task
+# zsh completion for task as of 1.6.0
+# P.C. Shyamshankar
+
+typeset -g _task_cmds
+_task_cmds=(add append annotate completed description description delete undelete info start stop done undo projects tags summary history ghistory next calendar active overdue stats import export color version help list long ls newest oldest)
+
+_task() {
+    _arguments -s -S \
+        "*::task command:_task_commands"
+    return 0
+}
+
+
+(( $+functions[_task_commands] )) ||
+_task_commands() {
+    local cmd ret=1
+    if (( CURRENT == 1 )); then
+        _describe -t commands 'task command' _task_cmds
+    else
+        local curcontext="${curcontext}"
+        cmd="${_task_cmds[(r)$words[1]:*]%%:*}"
+        if (( $#cmd )); then
+            curcontext="${curcontext%:*:*}:task-${cmd}"
+            _call_function ret _task_${cmd} || _message "No command remaining."
+        else
+            _message "Unknown subcommand ${cmd}"
+        fi
+        return ret
+    fi
+}
+