tests/test-pull

patch: support diff data loss detection and upgrade

In worst case, generating diff in upgrade mode can be two times more expensive
than generating it in git mode directly: we may have to regenerate the whole
diff again whenever a git feature is detected. Also, the first diff attempt is
completely buffered instead of being streamed. That said, even without having
profiled it yet, I am convinced we can fast-path the upgrade mode if necessary
were it to be used in regular diff commands, and not only in mq where avoiding
data loss is worth the price.

#!/bin/sh

mkdir test
cd test
echo foo>foo
hg init
hg addremove
hg commit -m 1
hg verify
hg serve -p $HGPORT -d --pid-file=hg.pid
cat hg.pid >> $DAEMON_PIDS
cd ..

hg clone --pull http://localhost:$HGPORT/ copy | sed -e 's,:[0-9][0-9]*/,/,'
cd copy
hg verify
hg co
cat foo
hg manifest --debug
hg pull | sed -e 's,:[0-9][0-9]*/,/,'

echo % issue 622
cd ..
hg init empty
cd empty
hg pull -u ../test

echo % test file: uri handling
hg pull -q file://../test-doesnt-exist
hg pull -q file:../test
hg pull -q file://foobar`pwd`/../test