tests/test-merge-commit

run-tests: fix _checkhglib() so it's correct when using --with-hg.

Since this makes the warning less likely, upgrade it to a "real"
warning to stderr.

#!/bin/sh
# check that renames are correctly saved by a commit after a merge

# test with the merge on 3 having the rename on the local parent
hg init a
cd a

echo line1 > foo
hg add foo
hg ci -m '0: add foo'

echo line2 >> foo
hg ci -m '1: change foo'

hg up -C 0
hg mv foo bar
rm bar
echo line0 > bar
echo line1 >> bar
hg ci -m '2: mv foo bar; change bar'

hg merge 1
echo '% contents of bar should be line0 line1 line2'
cat bar
hg ci -m '3: merge with local rename'
hg debugindex .hg/store/data/bar.i
hg debugrename bar
hg debugindex .hg/store/data/foo.i

# revert the content change from rev 2
hg up -C 2
rm bar
echo line1 > bar
hg ci -m '4: revert content change from rev 2'

hg log --template '{rev}:{node|short} {parents}\n'
echo '% this should use bar@rev2 as the ancestor'
hg --debug merge 3
echo '% contents of bar should be line1 line2'
cat bar
hg ci -m '5: merge'
hg debugindex .hg/store/data/bar.i


# same thing, but with the merge on 3 having the rename on the remote parent
echo
echo
cd ..
hg clone -U -r 1 -r 2 a b
cd b

hg up -C 1
hg merge 2
echo '% contents of bar should be line0 line1 line2'
cat bar
hg ci -m '3: merge with remote rename'
hg debugindex .hg/store/data/bar.i
hg debugrename bar
hg debugindex .hg/store/data/foo.i

# revert the content change from rev 2
hg up -C 2
rm bar
echo line1 > bar
hg ci -m '4: revert content change from rev 2'

hg log --template '{rev}:{node|short} {parents}\n'
echo '% this should use bar@rev2 as the ancestor'
hg --debug merge 3
echo '% contents of bar should be line1 line2'
cat bar
hg ci -m '5: merge'
hg debugindex .hg/store/data/bar.i