tests/test-archive-symlinks.t

revsets: let parents() return parents of working dir

This patch makes the 'set' argument to revset function parents() optional.
Like p1() and p2(), if no argument is given, returns the parent(s) of the
working directory.

Morally equivalent to 'p1()+p2()', as expected.

  $ "$TESTDIR/hghave" symlink || exit 80

  $ origdir=`pwd`

  $ hg init repo
  $ cd repo
  $ ln -s nothing dangling

avoid tar warnings about old timestamp

  $ hg ci -d '2000-01-01 00:00:00 +0000' -qAm 'add symlink'

  $ hg archive -t files ../archive
  $ hg archive -t tar -p tar ../archive.tar
  $ hg archive -t zip -p zip ../archive.zip

files

  $ cd "$origdir"
  $ cd archive
  $ $TESTDIR/readlink.py dangling
  dangling -> nothing

tar

  $ cd "$origdir"
  $ tar xf archive.tar
  $ cd tar
  $ $TESTDIR/readlink.py dangling
  dangling -> nothing

zip

  $ cd "$origdir"
  $ unzip archive.zip > /dev/null
  $ cd zip
  $ $TESTDIR/readlink.py dangling
  dangling -> nothing