Teach walk code about absolute paths. The first consequence of this is that absolute and relative paths now all work in the same way. The second is that paths that lie outside the repository now cause an error to be reported, instead of something arbitrary and expensive being done. Internally, all of the serious work is in the util package. The new canonpath function takes an arbitrary path and either returns a canonical path or raises an error. Because it needs to know where the repository root is, it must be fed a repository or dirstate object, which has given commands.matchpats and friends a new parameter to pass along. The util.matcher function uses this to canonicalise globs and relative path names. Meanwhile, I've moved the Abort exception from commands to util, and killed off the redundant util.CommandError exception.

#!/bin/sh

cat <<'EOF' > merge
#!/bin/sh
echo merging for `basename $1`
EOF
chmod +x merge
HGMERGE=./merge; export HGMERGE

mkdir A1
cd A1
hg init
echo This is file foo1 > foo
echo This is file bar1 > bar
hg add foo bar
hg commit -m "commit text" -d "0 0"

cd ..
hg clone A1 B1

cd A1
rm bar
hg remove bar
hg commit -m "commit test" -d "0 0"

cd ../B1
echo This is file foo22 > foo
hg commit -m "commit test" -d "0 0"

cd ..
hg clone A1 A2
hg clone B1 B2

cd A1
hg pull ../B1
hg update -m
hg commit -m "commit test" -d "0 0"
echo bar should remain deleted.
hg manifest

cd ../B2
hg pull ../A2
hg update -m
hg commit -m "commit test" -d "0 0"
echo bar should remain deleted.
hg manifest