Re: [PATCH] gitmodules: recurse by default

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Oct 06, 2022 at 05:10:10PM +0200, Philippe Mathieu-Daudé wrote:
> Hi Michael,
> 
> On 6/10/22 13:39, Michael S. Tsirkin wrote:
> > The most commmon complaint about submodules is that
> 
> Typo "common"
> 
> > they don't follow when one switches branches in the
> > main repo. Enable recursing into submodules by default
> > to address that.
> > 
> > Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> > ---
> >   .gitmodules | 23 +++++++++++++++++++++++
> >   1 file changed, 23 insertions(+)
> 
> We have 3 kinds of submodule (or more?):
> 1/ required to *build* QEMU
> 2/ required to *test* QEMU
> 3/ only here for satisfies license of firmware blobs shipped with QEMU.
> 
> IIUC, long-term we want to move 3/ in another repository.
> 
> Could we only set "recurse=true" for 1/ ?
> 
> What is your use-case? Do we need it also for 2/ ?

The use case is avoiding git diff output simply by switching
branches. to serve that purpose all submodules need to be recurse=true
unless they never change.

> > diff --git a/.gitmodules b/.gitmodules
> > index aedd9a03d4..5f32332aff 100644
> > --- a/.gitmodules
> > +++ b/.gitmodules
> > @@ -1,69 +1,92 @@
> >   [submodule "roms/seabios"]
> >   	path = roms/seabios
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/seabios.git/
> >   [submodule "roms/SLOF"]
> >   	path = roms/SLOF
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/SLOF.git
> >   [submodule "roms/ipxe"]
> >   	path = roms/ipxe
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/ipxe.git
> >   [submodule "roms/openbios"]
> >   	path = roms/openbios
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/openbios.git
> >   [submodule "roms/qemu-palcode"]
> >   	path = roms/qemu-palcode
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/qemu-palcode.git
> >   [submodule "roms/sgabios"]
> >   	path = roms/sgabios
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/sgabios.git
> >   [submodule "dtc"]
> >   	path = dtc
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/dtc.git
> >   [submodule "roms/u-boot"]
> >   	path = roms/u-boot
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/u-boot.git
> >   [submodule "roms/skiboot"]
> >   	path = roms/skiboot
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/skiboot.git
> >   [submodule "roms/QemuMacDrivers"]
> >   	path = roms/QemuMacDrivers
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/QemuMacDrivers.git
> >   [submodule "ui/keycodemapdb"]
> >   	path = ui/keycodemapdb
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/keycodemapdb.git
> >   [submodule "roms/seabios-hppa"]
> >   	path = roms/seabios-hppa
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/seabios-hppa.git
> >   [submodule "roms/u-boot-sam460ex"]
> >   	path = roms/u-boot-sam460ex
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/u-boot-sam460ex.git
> >   [submodule "tests/fp/berkeley-testfloat-3"]
> >   	path = tests/fp/berkeley-testfloat-3
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/berkeley-testfloat-3.git
> >   [submodule "tests/fp/berkeley-softfloat-3"]
> >   	path = tests/fp/berkeley-softfloat-3
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/berkeley-softfloat-3.git
> >   [submodule "roms/edk2"]
> >   	path = roms/edk2
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/edk2.git
> >   [submodule "slirp"]
> >   	path = slirp
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/libslirp.git
> >   [submodule "roms/opensbi"]
> >   	path = roms/opensbi
> > +	recurse = true
> >   	url = 	https://gitlab.com/qemu-project/opensbi.git
> >   [submodule "roms/qboot"]
> >   	path = roms/qboot
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/qboot.git
> >   [submodule "meson"]
> >   	path = meson
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/meson.git
> >   [submodule "roms/vbootrom"]
> >   	path = roms/vbootrom
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/vbootrom.git
> >   [submodule "tests/lcitool/libvirt-ci"]
> >   	path = tests/lcitool/libvirt-ci
> > +	recurse = true
> >   	url = https://gitlab.com/libvirt/libvirt-ci.git
> >   [submodule "subprojects/libvfio-user"]
> >   	path = subprojects/libvfio-user
> > +	recurse = true
> >   	url = https://gitlab.com/qemu-project/libvfio-user.git