tests/test-audit-path

update: add comments and test cases for updating across branches

Add comment to merge.py:update() showing various cases of 'hg update': to a
descendant, crossing named branches, and crossing branches within a named
branch; with no option, -c or -C; with or without uncommitted changes; and
with or without a specific revision. Add tests for all of these cases.

#!/bin/sh

hg init

echo % should fail
hg add .hg/00changelog.i

mkdir a
echo a > a/a
hg ci -Ama
ln -s a b
echo b > a/b

echo % should fail
hg add b/b

echo % should succeed
hg add b

echo % should still fail - maybe
hg add b/b

echo % unbundle tampered bundle
hg init target
cd target
hg unbundle $TESTDIR/tampered.hg

echo % attack .hg/test
hg manifest -r0
hg update -Cr0

echo % attack foo/.hg/test
hg manifest -r1
hg update -Cr1

echo % attack back/test where back symlinks to ..
hg manifest -r2
hg update -Cr2

echo % attack ../test
hg manifest -r3
hg update -Cr3

echo % attack /tmp/test
hg manifest -r4
hg update -Cr4 2>&1 | sed -e "s|/.*/test-audit-path|[HGTMP]/test-audit-path|"

exit 0