$ENV{HOME} should refer to the current user's home directory. On Windows Vista/7 this is "C:\Users\USER-NAME\" and on older versions of Windows it would be "C:\Documents and Settings\USER-NAME\"
Here is a perl script which might fix your problem with the script not getting the $ENV{HOME} value:
BEGIN {
if ( substr ( $^O, 0, 5 ) eq q{MSWin} ) {
if ( $ENV{HOME} ) {
# leave as is
}
elsif ( $ENV{USERPROFILE} ) {
$ENV{HOME} = $ENV{USERPROFILE};
}
elsif ( $ENV{HOMEDRIVE} and $ENV{HOMEPATH} ) {
$ENV{HOME} = $ENV{HOMEDRIVE} . $SENV{HOMEPATH};
}
else {
$ENV{HOME} = '.';
} } }
However, according to this SVN documentation page, the configuration for SubVersion is located in the registry and not on the file system. So I guess the script will need to be updated to work on Windows:
Subversion clients running on Windows platforms may also use the Windows Registry to hold the configuration data