tests/test-hardlinks-safety

localrepo: refactor prepush logic

Simplifies the prepush check logic and makes it a lot more direct and
comprehensible. Instead of comparing the total local vs. remote head count, it
compares the number of new vs. removed heads.

#!/bin/sh

# some implementations of cp can't create hardlinks
cat > cp.py <<EOF
from mercurial import util
import sys
util.copyfiles(sys.argv[1], sys.argv[2], hardlink=True)
EOF

# test hardlinking outside hg
mkdir x
echo foo > x/a

python cp.py x y
echo bar >> y/a
echo % no diff if hardlink
diff x/a y/a

# test mq hardlinking
echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH

echo % init
hg init a
cd a

hg qimport -n foo - << EOF
# HG changeset patch
# Date 1 0
diff -r 2588a8b53d66 a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/a	Wed Jul 23 15:54:29 2008 +0200
@@ -0,0 +1,1 @@
+a
EOF

hg qpush

cd ..
python cp.py a b
cd b

hg qimport -n bar - << EOF
# HG changeset patch
# Date 2 0
diff -r 2588a8b53d66 a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/b	Wed Jul 23 15:54:29 2008 +0200
@@ -0,0 +1,1 @@
+b
EOF

hg qpush

cat .hg/patches/status
echo %
cat .hg/patches/series
echo %%%
cat ../a/.hg/patches/status
echo %
cat ../a/.hg/patches/series

# test tags hardlinking
hg qdel -r qbase:qtip

hg tag -l lfoo
hg tag foo

cd ..
python cp.py b c
cd c

hg tag -l -r 0 lbar
hg tag -r 0 bar
echo %%%
cat .hgtags
echo %
cat .hg/localtags
echo %%%
cat ../b/.hgtags
echo %
cat ../b/.hg/localtags