Re: [Qemu-devel] [PATCH v3 3/5] build: allow automatic git submodule updates to be disabled

[Eric Blake <eblake@redhat.com>]

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On 11/03/2017 10:33 AM, Daniel P. Berrange wrote:
> Some people building QEMU use VPATH builds where the source directory is on a
> read-only volume. In such a case 'scripts/git-submodules.sh update' will always
> fail and users are required to run it manually themselves on their original
> writable source directory.
> 
> While this is already supported, it is nice to give users a command line flag
> to configure to permanently disable automatic submodule updates, as it means
> they won't get hard to diagnose failures from git-submodules.sh at an arbitrary
> later date.
> 
> This patch thus introduces a flag '--disable-git-update' which will prevent
> 'make' from ever running 'scripts/git-submodules.sh update'. It will still run
> the 'status' command to determine if a submodule update is needed, but when it
> does this it'll simply stop and print a message instructing the developer what
> todo. eg
> 
> $ ./configure  --target-list=x86_64-softmmu --disable-git-update
> ...snip...
> 
> $ make
>   GEN     config-host.h
>   GEN     trace/generated-tcg-tracers.h
>   GEN     trace/generated-helpers-wrappers.h
>   GEN     trace/generated-helpers.h
>   GEN     trace/generated-helpers.c
>   GEN     module_block.h
> 
> GIT submodule checkout is out of date. Please run
>   scripts/git-submodule.sh update ui/keycodemapdb
> from the source directory checkout /home/berrange/src/virt/qemu
> 
> make: *** [Makefile:31: git-submodule-update] Error 1
> 
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> ---
>  Makefile                 | 11 +++++++++++
>  configure                |  7 +++++++
>  scripts/git-submodule.sh |  9 +++++++++
>  3 files changed, 27 insertions(+)
> 

Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org


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