[libvirt] consistency: push "update" hook vs. "make syntax-check"

[Daniel P. Berrange]

On Thu, Jul 16, 2009 at 09:10:17AM +0200, Jim Meyering wrote:
> Jim Meyering wrote:
> > Currently the server side hook that runs "git diff --check"
> > to prevent pushing a change that adds trailing blanks is
> > more strict than our "make syntax-check" hook, since the former
> > rejects any change that adds blank lines at the end of a file,
> > while "make syntax-check" doesn't complain about that.
> >
> > The two should be consistent.
> > One way is to make "make syntax-check" more strict.
> > If we were to do that, we'd have to choose between
> > cleaning existing files and exempting them from the new test.
> > Cleaning is easy and doesn't impact tests at all, so I prefer it.
> >
> > Here's what would be involved:
> >
> >   - remove 121 trailing newlines from 109 files by running this command:
> >     git ls-files -z | xargs -0 perl -pi -0777 -e 's/\n\n+$/\n/'
> >
> > Add a rule to cfg.mk so that "make syntax-check" warns about
> > any new violations.  It might run something like this:
> >
> >     git ls-files -z \
> >       | xargs -0 perl -ln -0777 -e '/\n(\n+)$/ and print "$ARGV: ".length $1'
> >
> > That command prints the name of each offending file with its trailing
> > blank line count.  While it takes well under a second on my system,
> > (admittedly, with a hot cache), it's not well optimized, reading
> > each file into memory and processing it.
> 
> Here are two change-sets to implement that.
> The first just removes all trailing blank line, so I've
> omitted its boring 100+ diffs.
> 
> >From 90046bad3bb688f8bfddfedcf3b681cf9b99028d Mon Sep 17 00:00:00 2001
> From: Jim Meyering <meyering at redhat.com>
> Date: Thu, 16 Jul 2009 08:25:36 +0200
> Subject: [PATCH 1/2] remove all trailing blank lines
> 
> by running this command:
> git ls-files -z | xargs -0 perl -pi -0777 -e 's/\n\n+$/\n/'
> This is in preparation for a more strict make syntax-check
> rule that will detect trailing blank lines.

ACK


Daniel
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