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

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

On Wed, Nov 08, 2017 at 07:28:31PM +1100, Alexey Kardashevskiy wrote:
> On 07/11/17 21:12, Daniel P. Berrange wrote:
> > 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
> 
> 
> btw how is it expected to build from source tarball, without any .git
> directories present, for example with rpmbuild?

All submodules are bundled into the tar.xz, so submodules are never used
when building outside of git.

Regards,
Daniel
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