Re: [Qemu-devel] [PATCH v3 5/5] build: delay check for empty git submodule list

["Daniel P. Berrange" <berrange@redhat.com>]

On Tue, Nov 07, 2017 at 04:13:27PM +1100, Alexey Kardashevskiy wrote:
> On 07/11/17 15:12, Alexey Kardashevskiy wrote:
> > On 04/11/17 02:33, Daniel P. Berrange wrote:
> >> We short circuit the git submodule update when passed an empty module list.
> >> This accidentally causes the 'status' command to write to the status file. The
> >> test needs to be delayed into the individual commands to avoid this premature
> >> writing of the status file.
> >>
> >> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> >> ---
> >>  scripts/git-submodule.sh | 19 ++++++++++++-------
> >>  1 file changed, 12 insertions(+), 7 deletions(-)
> >>
> >> diff --git a/scripts/git-submodule.sh b/scripts/git-submodule.sh
> >> index 2857fc57c4..90376a7dae 100755
> >> --- a/scripts/git-submodule.sh
> >> +++ b/scripts/git-submodule.sh
> >> @@ -33,12 +33,6 @@ error() {
> >>      exit 1
> >>  }
> >>  
> >> -if test -z "$maybe_modules"
> >> -then
> >> -    test -e $substat || touch $substat
> >> -    exit 0
> >> -fi
> >> -
> >>  modules=""
> >>  for m in $maybe_modules
> >>  do
> >> @@ -51,7 +45,7 @@ do
> >>      fi
> >>  done
> >>  
> >> -if ! test -e ".git"
> >> +if test -n "$maybe_modules" && ! test -e ".git"
> > 
> > 
> > $GIT_DIR should be checked too imho:
> > 
> > if test -n "$maybe_modules" && ! test -e ".git" && test "$GIT_DIR" = ""
> 
> Uff. Just this won't help, it is assumed everywhere that the ".git" folder
> exists :(
> 
> I was hoping to use "git --work-dir=" for the source tree to have a full
> complete source tree to compile on a build machine but
> "./scripts/git-submodule.sh status" is always called, no matter what.

If you need to pass extra args to 'git' this is supported already by
this changeset. Just create a wrapper script containing whatever args
you need to give git, and use "./configure --with-git=your-wrapper"

> I'd really love to have some way to disable git activities in Makefile...

I don't want to add that. We don't want to ever build if we detect that
the submodules are at a different version to what we expect as it would
cause obscure hard to diagnose build problems

Regards,
Daniel
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