tests/test-diff-upgrade

commands: add more robust support for 'hg log -b' (issue2078)

Fixes issue2078 and adds tests to cover various 'hg log -b' uses.

This change adds a localrepo.lookupbranch(key, remote=None) function. This
will look up the branch of the revision with the given key. The algorithm
works like this:

    * If a remote repo is given and KEY is the name of a branch in that repo,
      return KEY.
    * If no remote repo is given and KEY is the name of a branch in the local
      repo object, return KEY.
    * Otherwise look up the revision with the identifier KEY in the local repo
      and return its branch.

This change also makes 'hg log -b' use this new functionality and adds a few
tests for it.

#!/bin/sh

echo "[extensions]" >> $HGRCPATH
echo "autodiff=$TESTDIR/autodiff.py" >> $HGRCPATH
echo "[diff]" >> $HGRCPATH
echo "nodates=1" >> $HGRCPATH

hg init repo
cd repo
echo '% make a combination of new, changed and deleted file'
echo regular > regular
echo rmregular > rmregular
touch rmempty
echo exec > exec
chmod +x exec
echo rmexec > rmexec
chmod +x rmexec
echo setexec > setexec
echo unsetexec > unsetexec
chmod +x unsetexec
echo binary > binary
python -c "file('rmbinary', 'wb').write('\0')"
hg ci -Am addfiles
echo regular >> regular
echo newregular >> newregular
rm rmempty
touch newempty
rm rmregular
echo exec >> exec
echo newexec > newexec
chmod +x newexec
rm rmexec
chmod +x setexec
chmod -x unsetexec
python -c "file('binary', 'wb').write('\0\0')"
python -c "file('newbinary', 'wb').write('\0')"
rm rmbinary
hg addremove

echo '% git=no: regular diff for all files'
hg autodiff --git=no

echo '% git=no: git diff for single regular file'
hg autodiff --git=yes regular

echo '% git=auto: regular diff for regular files and removals'
hg autodiff --git=auto regular newregular rmregular rmbinary rmexec

for f in exec newexec setexec unsetexec binary newbinary newempty rmempty; do
    echo '% git=auto: git diff for' $f
    hg autodiff --git=auto $f
done

echo '% git=warn: regular diff with data loss warnings'
hg autodiff --git=warn

echo '% git=abort: fail on execute bit change'
hg autodiff --git=abort regular setexec

echo '% git=abort: succeed on regular file'
hg autodiff --git=abort regular

cd ..