[ooo-build] Sharing the up-stream clones

[Jan Holesovsky]

Hi,

I suppose I am not the only one who has more ooo-build branches on his 
machine.  So far, when you were using --with-git, each of them created its 
own src/clone (clone of the up-stream sources), and the initial cloning took 
ages.

Not any more :-)  If you have eg. /local/master with an 
existing /local/master/src/clone, you can configure 
with --with-git=/local/master/src/clone later in eg. /local/ooo-build-3-2, 
and ooo-build-3-2 will share the clone - its src/clone will be simply a link 
to /local/master/src/clone.

When unpacking and copying to place, the trees are [should be ;-)] locked, so 
all should be safe even when you start 2 builds concurrently - but beware, 
this works only in master and ooo-build-3-2.  In case of problems, patches 
appreciated ;-)

HTH,
Kendy