#!/bin/sh

#
#  This file is part of the Yices SMT Solver.
#  Copyright (C) 2017 SRI International.
# 
#  Yices is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
# 
#  Yices is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
# 
#  You should have received a copy of the GNU General Public License
#  along with Yices.  If not, see <http://www.gnu.org/licenses/>.
#


#
# Construct a README file from a template
#
# Usage:
#   ./mkreadme <dist> <template>
# 
# <dist> must be a distribution directory like 
#   build/x86_64-unknown-linux-gnu-release/static_dist
#
# The template must be an appropriate text file for the distribution
# (e.g. etc/README.static.linux)
#
# This scripts replaces 
#  __YICES__      by the Yices version number
#  __GMP__        by the GMP version
#  __DYLIB__      by the name of the dynamic library
#  __OS_VERSION__ by the build OS
# in the template
#
# NOTE: For cross-compilation on cygwin, this script may not work for
# the mingw32 or mingw64 non-static distribution (can't run yices.exe
# from cygwin because the libgmp.xx.dll is not found). It should work 
# for the static mingw32 and mingw64 distributions.
#

usage="Usage: $0 <distribution directory> <template>\n
\n
   For example\n
\n 
    $0 ./build/x86_64-unknown-linux-gnu-release/dist ./etc/README.linux\n
"

if test $# != 2 ; then
   echo "$usage"
   exit 1
fi

dist=$1
template=$2
libdir=$dist/lib

if test ! -d $dist ; then
   echo "Error: $dist not found or not a directory"
   exit 1
fi

if test ! -f $template ; then
   echo "Error: $template not found"
   exit 1
fi

if test ! -d $libdir ; then
   echo "Error: $libdir not found or not a directory"
   exit 1
fi


if test -x $dist/bin/yices ; then 
  yices=$dist/bin/yices
else
  if test -x $dist/bin/yices.exe ; then
     yices=$dist/bin/yices.exe
  else
    echo "Error: can't find yices or yices.exe in $dist/bin"
    exit 1
  fi
fi


#
# Check whether we can execute $yices --version
#
{ $yices --version > /dev/null 2>&1 ; } || { echo "Error: can't run $yices" ; exit 1 ; }


#
# Get GMP version
#
tmp=` $yices --version | awk '/GMP/ { print $4 }' | tr -d '\015' `
case $tmp in
  *.*.* )
    gmp_version=$tmp
    ;;

  * )
    echo "Error: invalid GMP version (got $tmp)"
    exit 1
    ;;
esac

#
# Get Yices version
#
tmp=` $yices --version | awk '/Yices/ { print $2 }' | tr -d '\015' `
case $tmp in
  *.*.* )
    yices_version=$tmp
    ;;

  * )
    echo "Error: invalid Yices version (got $tmp)"
    exit 1
    ;;
esac


#
# Get the dynamic library name
# 
libname="none"
alllibs=`ls $libdir`
for lib in $alllibs; do
  case $lib in
    libyices.so.* | libyices.*.dylib )
      if test $libname = "none" ; then
        libname=$lib
      else
        echo "Error: found two dymanic libraries: $libname and $lib in $dist/lib"
        exit 1
      fi
    ;;
  esac
done


#
# Get os name and release
#
os_name=`uname 2>/dev/null` || os_name=unknown
os_release=`(uname -r) 2>/dev/null` || os_release=unknown
case "${os_name}:${os_release}" in
  unknown:* |  *:unknown )
    echo "Error: failed to get OS version\n"
    exit 1
    ;;

  *Linux* | *linux* )
    #
    # Try to get the distribution (via lsb_release)
    #
    linux_dist=`(lsb_release -d -s) 2>/dev/null` || linux_dist=unknown
    case $linux_dist in 
      unknown )
         os_version="${os_name} ${os_release}"
         ;;

      * )
         os_version="${linux_dist} (${os_name} ${os_release})"
         ;;
    esac
    ;;

  * )
    os_version="${os_name} ${os_release}"
    ;;
esac   

#
# On cygwin and possibly other systems, the os_release contains '/'
# so we can't do sed -e "s/__OS_VERSION__/${os_version}/g". Instead,
# we use sed -e "s,__OS_VERSION__,${os_version},g".
#
# To make sure this command works, we remove any ',' from the os_version.
#
clean_os_version=` echo $os_version | sed -e 's/,/ /g' `

#
# Apply the substitution
#
sed -e "s/__YICES__/${yices_version}/g" -e "s/__GMP__/${gmp_version}/g" \
    -e "s/__DYLIB__/${libname}/g" -e "s,__OS_VERSION__,${clean_os_version},g" $template