Re: [PATCH 0/2] xfsdump whitespace changes

[Jan Tulak <jtulak@redhat.com>]

On Mon, Nov 5, 2018 at 10:53 PM Dave Chinner <david@fromorbit.com> wrote:
>
> On Mon, Nov 05, 2018 at 01:25:45PM +0100, Jan Tulak wrote:
> > On Mon, Nov 5, 2018 at 12:48 PM Dave Chinner <david@fromorbit.com> wrote:
> > >
> > > On Mon, Nov 05, 2018 at 11:15:34AM +0100, Jan Tulak wrote:
> > > > On Fri, Nov 2, 2018 at 11:34 PM Dave Chinner <david@fromorbit.com> wrote:
> > > > >
> > > > > On Fri, Nov 02, 2018 at 12:43:18PM +0100, Jan Tulak wrote:
> > > > > > On Fri, Nov 2, 2018 at 2:36 AM Dave Chinner <david@fromorbit.com> wrote:
> > > > > > > On Thu, Nov 01, 2018 at 12:01:28PM +0100, Jan Tulak wrote:
> > > > > > > However, it's is the same change as what you originally posted to a
> > > > > >
> > > > > > Yes, it is the same thing, with changes where I found something
> > > > > > misaligned on top.
> > > > > >
> > > > > > > git tree, then it needs revision. basically, most of the change was
> > > > > > > converting vertically aligned function call parameters to use tabs,
> > > > > > > and that broke the vertical alignment.
> > > > > >
> > > > > > It is "s/    /\t/" limited to the beginning of the line.
> > > > >
> > > > > You mean 's/^    /\t/'?
> > > >
> > > > Yes, but in multiple iterations to get \t, \t\t, \t\t\t, ...
> > >
> > > Which is handled by this regex: 's/^\(\t*\)*    /\1\t/'
> > >
> > > In this case, I'm using "*", which means "match zero or more of the
> > > preceding expression" - which in this case is \t. That regex is
> > > enclosed in \(...\) to group the result, which is then back
> > > referenced in the output expression by \1 (first group backref).
> > >
> > > Regexes are extremely and flexible once you've learnt how the
> > > multiple object matching rules work.
> >
> > I know. But I don't see how your regex would take the number of
> > four-space groups and inserted the same number of \t,
>
> I thought you were asking about having multiple tabs preceding
> the "4 space group". If you simply want to change all 4 space
> groups, it's 's/\(    \)/\t/g':
>

[snip]

Thanks, but I know regular expressions, even if I usually don't get a
nontrivial expression on a first try. :-D

Anyway, how about this? I pushed it into a new branch (style-nov-8th)
https://github.com/jtulak/xfsdump/tree/style-nov-8th
(git clone --single-branch -b style-nov-8th
https://github.com/jtulak/xfsdump.git)

It is now in 16 patches, split usually one change at a time. Three of
them are over 500k in size, so I will need to cut them somehow into
more parts before sending them into the mailing list. But I ended up
with a small script set that does it all, including the creation of
commits, so I don't have to deal with conflicts if I will need to
change anything.

Btw, I wonder if these formatting scripts could be useful if I push
them somewhere publicly... About 2/3 are sed replacements, the last
third are gradually stricter configurations for Uncrustify
(http://uncrustify.sourceforge.net/, available in distro repos).

Thanks,
Jan


-- 
Jan Tulak