view tests/test-merge-remove @ 10189:e451e599fbcf

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

hg init repo
cd repo

echo foo > foo
echo bar > bar
hg ci -qAm 'add foo bar'

echo foo2 >> foo
echo bleh > bar
hg ci -m 'change foo bar'

hg up -qC 0
hg mv foo foo1
echo foo1 > foo1
hg cat foo >> foo1
hg ci -m 'mv foo foo1'

hg merge
hg debugstate --nodates
hg st -q

echo '% removing foo1 and bar'
cp foo1 F
cp bar B
hg rm -f foo1 bar
hg debugstate --nodates
hg st -qC

echo '% readding foo1 and bar'
cp F foo1
cp B bar
hg add -v foo1 bar
hg debugstate --nodates
hg st -qC

echo '% reverting foo1 and bar'
hg revert -vr . foo1 bar
hg debugstate --nodates
hg st -qC
hg diff