netdev - Re: [PATCH net-next/iproute 2/5] tc: bash-completion: Prepare action autocomplete to support several actions

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Date:   Mon, 6 Feb 2017 14:10:55 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Yotam Gigi <yotamg@...lanox.com>
Cc:     netdev@...r.kernel.org, eladr@...lanox.com, idosch@...lanox.com,
        jiri@...lanox.com, jhs@...atatu.com, mrv@...atatu.com
Subject: Re: [PATCH net-next/iproute 2/5] tc: bash-completion: Prepare
 action autocomplete to support several actions

On Mon,  6 Feb 2017 15:19:21 +0200
Yotam Gigi <yotamg@...lanox.com> wrote:

> The action autocomplete routine (_tc_action_options) currently does not
> support several actions statements in one tc command line as it uses the
> _tc_once_attr and _tc_one_from_list.
> 
> For example, in that case:
> 
> $ tc filter add dev eth0 handle ffff: u32 [...]  \
> 	   action sample group 5 rate 12 	 \
> 	   action sample <TAB>
> 
> the _tc_once_attr function, when invoked with "group rate" will not
> suggest those as they already exist on the command line.
> 
> Fix the function to use the _from variant, thus allowing each action
> autocomplete start from the action keyword, and not from the beginning of
> the command line.
> 
> Signed-off-by: Yotam Gigi <yotamg@...lanox.com>

This patch does not apply cleanly to current iproute2 net-next tree.
Please rebase and resubmit the whole series again.


$ cat bash-completion/tc.rej 
--- bash-completion/tc
+++ bash-completion/tc
@@ -454,26 +454,28 @@ _tc_filter_options()
 # Returns 0 is completion should stop after running this function, 1 otherwise.
 _tc_action_options()
 {
-    case $1 in
+    local from=$1
+    local action=${words[from]}
+    case $action in
         bpf)
             _tc_bpf_options
             return 0
             ;;
         mirred)
-            _tc_one_of_list 'ingress egress'
-            _tc_one_of_list 'mirror redirect'
-            _tc_once_attr 'index dev'
+            _tc_one_of_list_from $from 'ingress egress'
+            _tc_one_of_list_from $from 'mirror redirect'
+            _tc_once_attr_from $from 'index dev'
             return 0
             ;;
         sample)
-            _tc_once_attr 'rate'
-            _tc_once_attr 'trunc'
-            _tc_once_attr 'group'
+            _tc_once_attr_from $from 'rate'
+            _tc_once_attr_from $from 'trunc'
+            _tc_once_attr_from $from 'group'
             return 0
             ;;
         gact)
-            _tc_one_of_list 'reclassify drop continue pass'
-            _tc_once_attr 'random'
+            _tc_one_of_list_from $from 'reclassify drop continue pass'
+            _tc_once_attr_from $from 'random'
             return 0
             ;;
     esac