tests/test-merge-types

Improvement to 14ce129cfcd: Use try/except and pass filename on errors

Without the second part, the error message would be
  abort: Is a directory
instead of
  abort: Is a directory: /home/user/.cvspass

#!/bin/sh

hg init
echo a > a
hg ci -Amadd       # 0

chmod +x a
hg ci -mexecutable # 1

hg up 0
rm a
ln -s symlink a
hg ci -msymlink    # 2
hg merge --debug

echo % symlink is local parent, executable is other

if [ -h a ]; then
    echo a is a symlink
    $TESTDIR/readlink.py a
elif [ -x a ]; then
    echo a is executable
else
    echo "a has no flags (default for conflicts)"
fi

hg update -C 1
hg merge --debug

echo % symlink is other parent, executable is local

if [ -h a ]; then
    echo a is a symlink
    $TESTDIR/readlink.py a
elif [ -x a ]; then
    echo a is executable
else
    echo "a has no flags (default for conflicts)"
fi