Re: [PATCH] ip link/addr show: add empty line between interfaces

2015-09-07 Thread Jiri Benc
On Sun,  6 Sep 2015 13:01:09 +0200, Felix Kaiser wrote:
> This improves the readability of the output.

Or makes the readability worse by requiring more scrolling, depending
on number of interfaces you have and your taste. Many users prefer the
current format.

Also, as sad as it is, there are scripts out there that parse ip output
and I have no doubts this would break them.

 Jiri

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Re: [PATCH] ip link/addr show: add empty line between interfaces

2015-09-07 Thread Felix Kaiser
Excerpts from Jiri Benc's message of 2015-09-07 14:46:09 +0200:
> Or makes the readability worse by requiring more scrolling, depending
> on number of interfaces you have and your taste.

Of course it's slightly subjective, but I think it improves readability
quite a bit *especially* on servers with many interfaces.

Without the additional lines, you can obviously fit more on one screen,
but I don't think it's much, and I think that once you have a screenful
of text, adding some whitespace makes it much, much easier to focus on
the individual sections.

> Many users prefer the current format.

I've met users who prefer ifconfigs format (and have literally told me
that they find ips hard to read), and I've met users who use a shell
alias to hack newlines in (which is the motivation for this patch), and
everyone that I've shown side-by-side comparisons has been supportive.

> Also, as sad as it is, there are scripts out there that parse ip output
> and I have no doubts this would break them.

I'm aware.

My opinion is that if someone parses that, they deserve the opportunity
to fix their code. At the very least they could have used -oneline!

The default output format is clearly intended for humans; it seems
like no attention at all has been given to parseability. And that's
as it should be - since, because it requires the fewest keystrokes,
that's the format that nearly all interactive users are going to see,
and the output should be optimized for them.

If absolute compatibility even for badly written scripts that misuse
the tool had to be maintained then that'd mean that no improvements
could ever be made, and that'd be sad.

Felix
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Re: [PATCH] ip link/addr show: add empty line between interfaces

2015-09-07 Thread Jiri Benc
On Mon, 07 Sep 2015 17:38:48 +0200, Felix Kaiser wrote:
> My opinion is that if someone parses that, they deserve the opportunity
> to fix their code. At the very least they could have used -oneline!

No doubt. I also don't like scripts that parse the default "ip a"
output.

I just pointed out that there are different opinions and that it can
have some consequences. Personally, I have no strong feeling against
nor for the patch. It's up to Stephen to decide.

> I've met users who use a shell alias to hack newlines in

Which is not a bad solution, actually.

 Jiri

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Re: [PATCH] ip link/addr show: add empty line between interfaces

2015-09-07 Thread Stephen Hemminger
On Mon, 7 Sep 2015 17:54:11 +0200
Jiri Benc  wrote:

> On Mon, 07 Sep 2015 17:38:48 +0200, Felix Kaiser wrote:
> > My opinion is that if someone parses that, they deserve the opportunity
> > to fix their code. At the very least they could have used -oneline!
> 
> No doubt. I also don't like scripts that parse the default "ip a"
> output.
> 
> I just pointed out that there are different opinions and that it can
> have some consequences. Personally, I have no strong feeling against
> nor for the patch. It's up to Stephen to decide.
> 
> > I've met users who use a shell alias to hack newlines in
> 
> Which is not a bad solution, actually.
> 
>  Jiri
> 

Agreed with Jiri. I prefer the new shorter brief format, not longer format.
Did you ever try a system with 10 interfaces or 1000 tunnels??
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Re: [PATCH] ip link/addr show: add empty line between interfaces

2015-09-07 Thread Felix Kaiser
Excerpts from Stephen Hemminger's message of 2015-09-07 11:09:32 -0700:
> Agreed with Jiri. I prefer the new shorter brief format, not longer format.

As long as it requires extra typing, few are going to use it.
It's about the default.

Did you try the brief format with a few v6 addresses on an
interface? When the line gets wrapped, it gets hard to read.

Besides, this isn't about the brief format, but about making
the long format less unreadable.

> Did you ever try a system with 10 interfaces or 1000 tunnels??

The largest I tried it on had 11 interfaces (8 of which are for tunnels).
That's not 1000, but how many people have that?

After all the positive feedback I got locally I'm genuinely
surprised that you don't like it, but I guess that's the way it is.

Thanks for looking at it, though!
Felix
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