Add symlink method to util.opener. Differences from os.symlink: - the symlink name is relative to the opener base directory - if a file with that name already exists, it's removed - if necessary, parent directories are created - if the system (OS or filesystem) doesn't support symlinks, a regular file is created. Its contents are the symlink target.

#!/bin/sh
# test parents command

hg init a
cd a
echo % no working directory
hg parents

echo a > a
echo b > b
hg ci -Amab -d '0 0'
echo a >> a
hg ci -Ama -d '1 0'
echo b >> b
hg ci -Amb -d '2 0'

echo % hg parents
hg parents

echo % hg parents a
hg parents a

echo % hg parents -r 2
hg parents -r 2

echo % hg parents -r 2 a
hg parents -r 2 a