#!/bin/sh
MvexRelease="MVEX release 1"
    Proceed=true
  StartWith=

#
# Check for the tar file
#
cat <<EOF
This shell script is intended to ease the installation of $MvexRelease
into an existing X11 build environment.  You'll be asked a few
questions and then installation will begin.  If you cooperate,
then no one will get hurt :-)

checking files...
EOF

if [ -f mvex-r1.tar.Z ]
then
    StartWith=mvex-r1.tar.Z
    echo "mvex-r1.tar.Z is present... I'll start with that."
else
if [ -f mvex-r1.tar ]
then
    StartWith=mvex-r1.tar
    echo "mvex-r1.tar is present... I'll start with that."
else
if [ -f mvex-files.tar ]
then
    StartWith=mvex-files.tar
    echo "Looks like you've unpacked, mvex-files.tar is present..."
    echo "I'll start with that."
else
    echo "I can't find mvex-r1.tar.Z, mvex-r1.tar or even mvex-files.tar"
    echo "You must be in the wrong directory.  Put mvex-r1.tar.Z or"
    echo "mvex-r1.tar in your current directory, and run this script again."
    exit
fi; fi; fi

#
# Find out which server to use 
#
cat <<EOF

Your X11 server sources are either release 4 (R4) or release 5 (R5)
or somewhere in between.  Pike the one to which it is closest.


EOF
while :
do
    echo -n "What version of X11 are you using (r4 or r5): "
    read version

    case "$version" in
    r4)	break;;
    r5) break;;
    *)	echo "Your answer must be r4 or r5";;
    esac
done

#
# Check that the diffs are present
#
case "$StartWith" in
mvex-r1.tar.Z|mvex-r1.tar) ;;
*)
    if [ ! -f $version-diffs.tar -o -f $version-difflist ]
    then
	echo
	echo "$version-diffs.tar or $version-difflist is not present... you"
	echo "must have forgotten to unpack it.  Put mvex-r1.tar.Z or"
	echo "mvex-r1.tar in your current directory, and run this script again."
	exit
    fi
    ;;
esac

#
# Check the directory tree.
#
cat <<EOF

To install this extension, I need to know the path of the server
sub-directory for your X11 tree.  On our system it is in
/usr/local/src/x11r5/mit/server.  


EOF

while :
do
    echo -n "Where's your server directory (relative paths are ok): "
    read serverDir
    echo
    if [ ! -d "$serverDir" ]
    then
	if [ -f "$serverDir" ]
	then
	    echo "Thats not a dirctory, its..."
	    ls -ld "$serverDir"
	else
	    echo "$serverDir doesn't exist!  Try again."
	fi
	continue
    fi

    #
    # check out the specified file
    #
    topMitDir=`(cd $serverDir/..; pwd)`
	server="server "
    extensions="extensions "
       include="include "
	   lib="lib "
	 fonts="fonts "
	 files=`ls -F $topMitDir`
    for file in $files
    do
	case "$file" in
	server/)	server=;;
	extensions/)	extensions=;;
	include/)	include=;;
	lib/)		lib=;;
	fonts/)		fonts=;;
	esac
    done

    case "${server}x${extensions}x${include}x${lib}x${fonts}" in
    xxxx)break;;
    *)	echo "There seems to be a problem... assuming"
	echo "that $topMitDir (which is $serverDir/..)"
	echo "is the top level of the build tree, the following directories"
	echo "are missing: $server$extensions$include$fonts$lib"
	echo
	echo -n "do you want to continue (y or n): "

	read ans
	case "$ans" in
	y*)	break;;
	*)	exit;;
	esac
	;;
    esac
done

#
# Install it
#

echo 
echo 
case "$StartWith" in
mvex-r1.tar.Z)
    echo "Unpacking the necessary files..."
    uncompress < mvex-r1.tar.Z \
    | tar xvf - mvex-files.tar $version-diffs.tar $version-difflist
    ;;
mvex-r1.tar)
    echo "Unpacking the necessary files..."
    tar xvf mvex-r1.tar mvex-files.tar $version-diffs.tar $version-difflist
    ;;
esac

echo
echo "I will put a new set of files"
echo "in $topMitDir/extensions/mvex"
echo -n "Hit return to continue or ^C to quit..."
read prompt

(cd $topMitDir; tar xvf -) < mvex-files.tar

echo
echo "I will put a set of patches (diffs)"
echo "in $topMitDir/server"
echo "right next to each file to be patched."
echo -n "Hit return to continue or ^C to quit..."
read prompt

(cd $topMitDir; tar xvf -) < $version-diffs.tar

echo
echo "Now, I need to patch of the files."
echo -n "Hit return to continue or ^C to quit..."
read prompt

(
    cd $topMitDir
    while read file
    do
	(set -x; patch $file < $file.diff)
    done
) < $version-difflist

cat <<EOF

The rest is up to you.  If you haven't built anything in the X11 tree,
you should should read the X11 release notes that should be in
$topMitDir/RELNOTES.TXT.  If you already have everything but mvex built,
then the following commands should be sufficient.

	cd $topMitDir
	make -k Makefiles SUBDIRS="extensions server"
        make -k includes                # very, very important
        make -k depend
        make -k

If you have problems, be sure to let me know --- toddb@sail.labs.tek.com
EOF