Subject: Re: [PATCH v3 1/3] t5323: test cases for git-pack-redundant

From: SZEDER Gábor <[email-masked]>
Date: Thu, 10 Jan 2019 12:57:04 +0100

On Thu, Jan 10, 2019 at 11:28:34AM +0800, Jiang Xin wrote:
> SZEDER Gábor <[email-masked]> 于2019年1月9日周三 下午8:56写道：
> > > +             sed -e "s#^.*/pack-\(.*\)\.\(idx\|pack\)#\1#g" | \
> >
> > This sed command doesn't seem to work on macOS (on Travis CI), and
> > causes the test to fail with:
> >
> 
> It works if rewrite as follows:
> 
>     git pack-redundant --all >out &&
>     sed -E -e "s#.*/pack-(.*)\.(idx|pack)#\1#" out | \
> 
> Without `-E`, MasOS has to write two seperate sed commands, such as:
> 
>     git pack-redundant --all >out &&
>     sed -e "s#.*/pack-\(.*\)\.idx#\1#" out | \
>     sed -e "s#.*/pack-\(.*\)\.pack#\1#"
> 
> Option '-E' is an alias for -r in GNU sed 4.2  (added in 4.2, not documented
> unti 4.3), released on May 11 2009.  I prefer the `-E` version.

Is 'sed -E' portable enough, e.g. to the various BSDs, Solaris, and
whatnot?  I don't know, but POSIX doesn't mention it, there is not a
single instance of it in our current codebase, and it appears that
we've never used it before, either.  OTOH,
't/check-non-portable-shell.pl' doesn't catch it as non-portable
construct...