Ben Pfaff <[email protected]> writes:
> On Wed, Dec 07, 2016 at 10:55:54AM -0500, Aaron Conole wrote:
>> Adds a new --format="xx={0},..." to the table library, which allows
>> users to make table output formats to match their own needs.
>>
>> Signed-off-by: Aaron Conole <[email protected]>
>> ---
>> v1 url:
>> https://mail.openvswitch.org/pipermail/ovs-dev/2016-November/325235.html
>>
>> TODO: Still needs unit tests to check the format strings
>> One thing I want to do is put in the idea of string length to the
>> grammar. Probably will be a few other additions (ex: text which is
>> omitted when the corresponding column value is empty).
>>
>> NOTE: Submitted for early feedback
>
> Can you give an example of a use case? If we're going to add this
> feature for formatting, I'd like to know that it's going to be genuinely
> useful to users.
Yes, sorry - I should have re-included my previous cover letter;
I am currently asked by some openstack folks to aid with 'debugability'
- specifically, they want a change to the openflow printing such that
they have data like:
COL1 COL2 COL3
==== ==== ====
They want to choose the columns 'as-needed', and I think they also want
to change the formats. Rather than code up multiple custom styles, I'd
like to just give them the ability to change output formats as they
wish.
To accomplish this, I'm going down the following route:
1. Add formatting option to the lib/table.{c,h}, such that we can
still express the existing output.
2. Change ofp-print to use a table for flow dumping, with a default
format that preserves the current format, and the option of changing
the format.
Hopefully, I've explained it.
Thanks,
-Aaron
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