INSTALLSCRIPT doesn't have 'site', 'vendor' values?

[Ken Williams]

Hi,

I notice the following in the MakeMaker docs (version 5.91_01):

INSTALLDIRS set to
perl site vendor

PREFIX SITEPREFIX VENDORPREFIX
INST_ARCHLIB INSTALLARCHLIB INSTALLSITEARCH INSTALLVENDORARCH
INST_LIB INSTALLPRIVLIB INSTALLSITELIB INSTALLVENDORLIB
INST_BIN INSTALLBIN INSTALLSITEBIN INSTALLVENDORBIN
INST_SCRIPT INSTALLSCRIPT INSTALLSCRIPT INSTALLSCRIPT
INST_MAN1DIR INSTALLMAN1DIR INSTALLSITEMAN1DIR INSTALLVENDORMAN1DIR
INST_MAN3DIR INSTALLMAN3DIR INSTALLSITEMAN3DIR INSTALLVENDORMAN3DIR

I'm curious about why INST_SCRIPT doesn't have different values in the three columns. Is this why things like LWP's "HEAD" script are installing to /usr/bin on OS X instead of to /usr/local/bin?

In my case, I'm writing a prompt like the following, but I suspect there's a better way to get the destination directory so that the user could override it with INST_SCRIPT=/foo or something. Is there some way to get this value from MakeMaker instead of from Config?

if (prompt("Do you want to install the command-line script 'categorizer' ".
"to $Config::Config{installscript}?", 'n') =~ /^y/i) {
$options{EXE_FILES} = [qw(eg/categorizer)];
}

-Ken