[coreboot] [PATCH] Use a tag for SeaBIOS stable checkouts.

[Kevin O'Connor]

On Sun, Jan 23, 2011 at 09:06:01PM +0100, Stefan Reinauer wrote:
> * Kevin O'Connor <kevin at koconnor.net> [110122 17:28]:
> > Use a tag (rel-0.6.1.3) for SeaBIOS stable checkouts instead of the
> > stable branch.  The tag is a little safer because it prevents an
> > incorrect commit to the stable branch from being immiediately picked
> > up by coreboot users.
> > 
> > Note - rel-0.6.1.3 (and 0.6.1-stable) now have the CFLAGS build fix
> > that was causing build failures for coreboot users.
> > 
> > Signed-off-by: Kevin O'Connor <kevin at koconnor.net>
> > ---
[...]
> Not sure what the right fix is for this. I neither want to check the
> changes I make to the config file in to the local repository nor do I
> want to undo/redo the changes for every build, nor do I want to
> re-checkout for every target. Is this possible with git?

The following makes it less of a problem for me, but I'm not sure it's
the right way either.

--- a/payloads/external/SeaBIOS/Makefile.inc
+++ b/payloads/external/SeaBIOS/Makefile.inc
@@ -1,6 +1,6 @@
 
 
-TAG-$(CONFIG_SEABIOS_MASTER)=master
+TAG-$(CONFIG_SEABIOS_MASTER)=origin/master
 TAG-$(CONFIG_SEABIOS_STABLE)=rel-0.6.1.3
 
 all: seabios
@@ -18,9 +18,9 @@ patch: checkout
 
 checkout:
        echo "Checking out SeaBIOS $(TAG-y)"
-       test -d seabios && ( cd seabios; git pull ) || \
+       test -d seabios && ( cd seabios; git fetch ) || \
        git clone git://git.linuxtogo.org/home/kevin/seabios.git seabios
-       cd seabios; git checkout $(TAG-y)
+       cd seabios; git checkout -m $(TAG-y)
 
 clean:
        test -d seabios && (cd seabios; $(MAKE) CC="$(CC)" LD="$(LD)" clean) || exit 0

The best way is probably to never checkout a branch - only ever pull a
tag.  Then the build can detect if the tag ever changes and reapply
the patch.

-Kevin