Re: [PATCH] contrib/git-subtree: Use /bin/sh interpreter instead of /bin/bash

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On Mon, May 20, 2013 at 03:36:58PM -0700, Junio C Hamano wrote:
> Dmitry Marakasov <amdmi3@xxxxxxxxx> writes:
> 
> > Use /bin/sh interpreter instead of /bin/bash for contrib/git-subtree:
> > it's required for systems which don't use bash by default (for example,
> > FreeBSD), while there seem to be no bashisms in the script (confirmed
> > by looking through the source and tesing subtree functionality with
> > FreeBSD's /bin/sh) to require specifically bash and not the generic
> > posix shell.
> 
> Has anybody audited to make sure that the script itself is free of
> bash-isms?
> 
> I somehow had an impression that in the past it was littered with
> bash-isms like function local variables and array variables and
> assumed that the #!/bin/bash was necessary.  I did a quick
> eyeballing and did not see anything glaringly bash-only, but I may
> have missed something (the coding style is so different from the
> core part of Git Porcelains and distracting for me to efficiently
> do a good job of scanning).

I ran the test suite with dash and everything passed.

checkbashisms doesn't find any problems either.

> >
> > Signed-off-by: Dmitry Marakasov <amdmi3@xxxxxxxxx>
> > ---
> >  contrib/subtree/git-subtree.sh | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
> > index 8a23f58..5701376 100755
> > --- a/contrib/subtree/git-subtree.sh
> > +++ b/contrib/subtree/git-subtree.sh
> > @@ -1,4 +1,4 @@
> > -#!/bin/bash
> > +#!/bin/sh
> >  #
> >  # git-subtree.sh: split/join git repositories in subdirectories of this one
> >  #
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