#!/bin/bash
## Thanks to Brian Logan corrected $link to $links at end. This bug
## would have prevented installation of links.
## 19 Dec 2005
##
## $local/com/INSTALL_BHAM_LINUX_POPLOG
## http://www.cs.bham.ac.uk/research/poplog/com/INSTALL_BHAM_LINUX_POPLOG
## Install poplog
##      o with or without motif
##      o with original (isl/core) startup image
##      o in default directory or specified directory
##
## RUN THIS WITH THREE OR FOUR ARGUMENTS.
##
##      The first is
##          motif or nomotif
##
##      The second is
##          bham or original
##
##      The third is the directory in which to locate poplog
##          or default
##          (default selects /usr/local/poplog)
##          If no third directory is given, it will create a
##          pop/ subdirectory of the current directory and use that
##
##      The Final argument is optional and determines whether
##          symbolic links will be installed in /usr/local/bin
##          and /usr/local/man
##          If provided it can be either 'nolinks' or 'links'.
##          If not provided it defaults to 'links'
##          (However if not run as root the links will not be installed.)
##
## Aaron Sloman (http://www.cs.bham.ac.uk/~axs/)
## Revised 27 May 2005
##  Made 3rd argument optional
##
## Revised 19 Feb 2005
##  Provided optional 4th argument
##
## Revised 20 Jan 2005
##  John Duncan reported typo.
##      INSTALL_POPLOG should have been INSTALL_BHAM_LINUX_POPLOG throughout
##      Now fixed
##

popversion=v15.6
export popversion

if [ "x$1" == "x" ] || [  "$1" == "-help" ] || [ "$1" == "help" ]
then

   echo ""
   echo "   Three or four arguments are required."
   echo "   The first should be either"
   echo "       motif"
   echo "     or"
   echo "       nomotif"
   echo ""
   echo "   The second determines the saved image configuration and should be either"
   echo "       bham"
   echo "   or"
   echo "       original"
   echo ""
   echo "   The third should be either an installation directory or just"
   echo "       default"
   echo "       (The 'default' installation directory is /usr/local/poplog/)"
   echo "       If nothing is specified a pop/ subdirectory of current directory"
   echo "       will be created"
   echo ""
   echo "   The fourth argument is optional and may be 'links' or 'nolinks'"
   echo "       If it is 'links' (the default if omitted) a link to an executable"
   echo "       poplog file will be placed in /usr/local/bin and links to documentation"
   echo "       will be placed in /usr/local/man/man1, so that 'man poplog' works"
   echo "       NB: the links cannot be installed if you do not have write access"
   echo "       to those directories, which normally requires this script to be run"
   echo "       as root."
   echo "       If you don't have access, links will not be installed, even"
   echo "       if requested, and a warning will be displayed."
   echo " "
   echo "======"

   echo "   Examples:"
   echo "       ./INSTALL_BHAM_LINUX_POPLOG motif   bham   default  links > install.log"
   echo " "
   echo "       ./INSTALL_BHAM_LINUX_POPLOG nomotif bham   ~/mypop  nolinks > install.log"
   echo "   "
   echo "       ./INSTALL_BHAM_LINUX_POPLOG motif   original /usr/local/newpoplog > install.log"
   echo " "
   echo "   Use new pop/ sub-directory here: "
   echo "       ./INSTALL_BHAM_LINUX_POPLOG motif   bham   > install.log"
   echo " "
   echo "   Recommended: run as root thus: "
   echo "       ./INSTALL_BHAM_LINUX_POPLOG motif   bham   default  links > install.log"
   echo "   ===="
   echo ""
   echo "   Use the format 'COMMAND > install.log' to save output in file install.log"
   echo ""
   echo ""

   exit
fi

## Run this in the directory in which the poplog tar file
## has been unpacked

tardir=`pwd`

echo ""
echo "Installing poplog from tar bundle in $tardir"

## Create Poplog directory and define some environment variables
## Assumes that either a directory has been passed in as argument or
## the default should be used

motif=unset

if [ "$1" == "motif" ];
then

    motif=true
    echo "Installing with motif"

elif [ "$1" == "nomotif" ];
then
    motif=false
    echo "Installing without motif"

elif [ "$1" == "" ];
then

    echo "First argument missing: should be 'motif' or 'nomotif'"
    exit 1

else
     echo $1 " not accepted: should be 'motif' or 'nomotif'"
    exit 1
fi

startup=unset

if [ "$2" == "bham" ];
then
    startup=bham

elif [ "$2" == "original" ];
then
    startup=orig

elif [ "$2" == "" ];
then

    echo "Second argument missing: should be 'bham' or 'original'"
    exit 1

else
     echo $2 " not accepted: should be 'bham' or 'original'"
    exit 1
fi

if [ "$3" == "" ] ;
then
    4="links"
    3=""
fi

if [ "$3" == "default" ] ;
then

    rootdir=/usr/local/poplog

elif [ "$3" == "" ];
then

    rootdir=`pwd`/pop
    echo "Installing in $rootdir"
    4="links"
else

    rootdir=$3
fi

if [ "$4" == "" ] || [ "$4" == "links" ] ;
then

    links=1

    echo "Links from /usr/local/{bin,man} will be installed if possible"
    echo ""

else
    echo "Symbolic links from /usr/local will not be installed"
    echo ""

    links=0
fi


echo ""
echo "Installing $1 $2 Poplog version $popversion in: $rootdir"

export rootdir

echo "Root directory for poplog set to: $rootdir"
echo "Creating directories for poplog and local extensions there."

mkdir $rootdir $rootdir/$popversion $rootdir/local

chmod 755 $rootdir $rootdir/$popversion $rootdir/local

export usepop=$rootdir/$popversion

## Location for local saved images
## Version specific
export poplocalbin=$usepop/poplocalbin

mkdir $poplocalbin

export poplocal=$rootdir

export local=$poplocal/local

echo "  poplocal is $poplocal"
echo "  local    is $local"
echo "  usepop   is $usepop"
#echo "  poplocalbin is $poplocalbin"


### NOW UNPACK TAR FILE

cd $rootdir

# Create a useful symbolic link, after first removing old one
# if it exists
rm -f current-poplog
ln -s $popversion current-poplog

echo "Unpacking tar file. May take some time"

# Install linux poplog with motif

tar tvfz $tardir/bham-linux-poplog-${popversion}.tar.gz | head -5

zcat $tardir/bham-linux-poplog-${popversion}.tar.gz | tar xf -

echo "UNPACKING POPLOG TAR FILE COMPLETE"

echo "main poplog system installed in $usepop"

echo "Creating startup scripts"

cd $usepop/INSTALL

echo "Running the 'pre-check' script CHECK_LINUX_FACILITIES"

./CHECK_LINUX_FACILITIES

./CREATE_SCRIPTS $rootdir

ls -l $usepop/bin/poplog*

echo "poplog and poplog.sh startup scripts Done"

echo "======================================================"

echo "directories in $usepop/pop "
ls -l $usepop/pop/

echo "======================================================"
echo "Now rebuilding system images"

. $usepop/pop/com/poplog.sh

export popsrc=$usepop/pop/src
export popsys=$usepop/pop/pop

## Now link poplog.

echo "going to INSTALL dir $usepop/INSTALL "
cd $usepop/INSTALL

echo "100"
if [ "$startup" == "bham" ]
then

    echo "Selecting 'bham' version of mkstartup"

    ./LINK_LIKE_BHAM

else

    echo "Selecting 'core' version of mkstartup"

    ./LINK_LIKE_CORE

fi

if [ $motif == "true" ]
then

    echo " Run LINK_MOTIF_POPLOG"
    ./LINK_MOTIF_POPLOG

else

    echo "Run .LINK_NOMOTIF_POPLOG"
    ./LINK_NOMOTIF_POPLOG

fi

## Check for success of LINK command
if [ -f $usepop/pop/lib/psv/startup.psv ]
then
    echo "Install $1 $2 $3 $4 worked OK"
    echo "Saved images in $usepop/pop/lib/psv/"
else
    echo "PROBLEM: Install $1 $2 $3 $4 did not work"
    echo "This could be due to a problem accessing motif libraries"
    echo "Try repeating installation using 'nomotif' instead of 'motif'"
    echo "Your motif libraries are shown by 'ls -l /usr/X11R6/lib/libXm.so*'"

    ls -l /usr/X11R6/lib/libXm.so*

    echo "Exiting installation"

    exit 1
fi

if [ "$links" == "1" ]
then
    echo "Installing link for running poplog"

    rm /usr/local/bin/poplog

    ln -s $usepop/bin/poplog.sh /usr/local/bin/poplog

    ls -l /usr/local/bin/poplog

    echo "Installing man files"

    cd /usr/local/man/man1
    ln -s $usepop/man/man1/* .
else
    echo "Executable and man files not linked"

fi

echo "done INSTALL POPLOG FOR LINUX + PC in $rootdir using $1 $2"