patch.diff: avoid calling workingctx().manifest() Right now, to generate the manifest of the working dir, we have to perform a full walk of the working dir, which will be very slow, especially if we're interested in only a small part of it. Since we use the manifest only to find out the mode of files for git patches, manually build an execf function to do it. This should fix issue567.

#!/bin/sh

hg init rep
cd rep
mkdir dir
touch foo dir/bar
hg -v addremove
hg -v commit -m "add 1" -d "1000000 0"
cd dir/
touch ../foo_2 bar_2
hg -v addremove
hg -v commit -m "add 2" -d "1000000 0"

cd ..
hg init sim
cd sim
echo a > a
echo a >> a
echo a >> a
echo c > c
hg commit -Ama
mv a b
rm c
echo d > d
hg addremove -s 50
hg commit -mb