#!/bin/sh
#-----------------------------------------------------------------------------#
# INSTALL - installation instructions and installation script
#	    for the binary distribution of Mercury.
#
# You need GNU C (3.4 or later) and GNU Make (3.69 or later) in order
# to use Mercury, though you don't need them to install this distribution.
# To use the Mercury debugger, you may also need GNU Readline.
#
# Step 0.  Extract the files from the gzipped tar archive.
#
#	   Note: the mercury-*.tar.gz file itself contains
#	   some other .tar.gz files (lib.tar.gz, info.tar.gz).
#	   Do NOT mess with these nested .tar.gz files;
#	   they will be extracted automatically in step 2.
#
# Step 1.  Run this script.  (Just type `sh INSTALL'.)
#
#	   By default, the files will be installed in the directory
#	   /usr/local/mercury-@VERSION@.
#	   If you want the files to be installed someplace else,
#	   use the `--prefix <directory>' option to `INSTALL'.
#
#	   For a list of other configuration options, use
#	   `sh INSTALL --help'.
#	   `--prefix <directory>', if specified, must precede any
# 	   other options.
#
# Step 3.  Check the permissions on the installed files.
#	   Add /usr/local/mercury-@VERSION@/bin to your PATH, and
#	   add /usr/local/mercury-@VERSION@/man to your MANPATH.
#	   add /usr/local/mercury-@VERSION@/info to your INFOPATH.
#	   You can also add a WWW link to the Mercury documentation in
#	   /usr/local/mercury-@VERSION@/lib/mercury/html to your WWW
#	   home page, and you may want to print out a hard-copy of the
#	   documentation from the DVI files in
#	   /usr/local/mercury-@VERSION@/lib/mercury/doc.
#
#	   If the binary distribution includes the deep profiler, then check
#	   whether "make install" was able to copy scripts/mdprof to the web
#	   server's CGI directory (normally /usr/lib/cgi-bin). This directory
#	   is often writeable only by root or by the web server administrator,
#	   so you may need more than your usual set of privileges to do the
#	   copy (i.e. you may need to "su" to the appropriate user).
#
#	   To use the emacs debugger interface ("M-x mdb"), you also need to
#	   add the following lines to the `.emacs' file in your home directory:
#
#	   	(setq load-path (cons (expand-file-name
#		  "/usr/local/mercury-@VERSION@/lib/mercury/elisp") load-path))
#		(autoload 'mdb "gud" "Invoke the Mercury debugger" t)
#
#-----------------------------------------------------------------------------#
#
# De-installation:
# ----------------
#
# You may eventually want to uninstall this version of Mercury
# (to free up disk space so you can install the next version ;-).
# If you installed in the default location, you can simply
# use `rm -rf /usr/local/mercury-@VERSION@' to uninstall.
#-----------------------------------------------------------------------------#

prefix=/usr/local/mercury-@VERSION@

while : ; do
	case "$1" in
		-h|--help|"-?")
			scripts/mercury_config --help
			exit 0
			;;

		--prefix)
			prefix=$2
			shift
			;;
		--prefix=*)
			prefix=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'`
			;;

		--)
			shift
			break
			;;
		*)
			break
			;;
	esac
	shift
done

# Install the files.
make INSTALL_PREFIX=$prefix install || { echo Installation failed; exit 1; }

# Reconfigure the installation.
# This is needed because the installation directory and C compiler
# may be different than on the machine on which the distribution
# was built.
case $# in
	0) scripts/mercury_config --input-prefix $prefix \
			--output-prefix $prefix || \
			{ echo Configuration failed; exit 1; } ;;
	*) scripts/mercury_config --input-prefix $prefix \
			--output-prefix $prefix -- "$@" || \
			{ echo Configuration failed; exit 1; } ;;
esac

# Perform parts of the installation which use
# values determined by the configuration.
make MMAKE_VARS=$prefix/lib/mercury/mmake/Mmake.vars post_install || \
		{ echo Post-installation failed; exit 1; }