configure

#!/bin/bash

# Re-invoke the configure script
# and keep the output at bay.
if [ "$1" != "quiet" ];
then
  $0 "quiet" $@ > /dev/null
  exit $?
fi
shift

set -o errexit
set -o nounset

# Determine system
uname_linux=0
uname_cygwin=0
uname_osx=0
uname=$(uname)
if [ "$uname" = "Linux" ];
then
  uname_linux=1
elif [ "$uname" = "Darwin" ];
then
  uname_osx=1
elif [ "$(uname -o)" = "Cygwin" ];
then
  uname_cygwin=1
else
  echo "Invalid uname ($uname): unsuppported platform" 1>&2
  exit 1
fi

log() { echo "$@" 1>&2; }
log_start() { printf "$@" 1>&2; }
log_end() { echo "$@" 1>&2; }
log_exit() { echo "$@" 1>&2; exit 1; }

project=jest
log "Configuring ${project}"

prefix=/usr/local
includedir="$prefix/include"
threads=4
cxx_platform_flags=
ld_platform_libs=

# Project-specific flags

if [ "1" -eq "$uname_linux" ];
then
  log "Platform: Linux"
elif [ "1" -eq "$uname_osx" ];
then
  log "Platform: OS X"
  cxx_platform_flags="-stdlib=libc++ -I/opt/local/include"
  ld_platform_libs="-lc++"
elif [ "1" -eq "$uname_cygwin" ];
then
  log "Platform: Cygwin (NOT TESTED)"
fi

function show_help
{
  log "Usage: $0 [OPTION...]"
  log
  log "General:"
  log "  -h, --help                                   Show this help message"
  log "  --prefix=[/usr/local]                        Set installation prefix"
  log "  --includedir=[/usr/local/include]            Set include prefix"
  log "  --threads=[4]                                Set number of threads to use"
  log
  exit 0
}

# Parse params
for i in "$@"
do
  case $i in
    --prefix)
      shift
      prefix="$1"
      includedir=$prefix/include
      shift
      ;;
    --prefix=*)
      prefix="${i#*=}"
      includedir=$prefix/include
      shift
      ;;

    --includedir)
      shift
      includedir="$1"
      shift
      ;;
    --includedir=*)
      includedir="${i#*=}"
      shift
      ;;

    --threads)
      shift
      threads=$1
      shift
      ;;
    --threads=*)
      threads=${i#*=}
      shift
      ;;

    -h)
      show_help
      ;;
    --help*)
      show_help
      ;;

    *)
      # Unknown option
      ;;
  esac
done

# Update after params
log
log "Install prefix: $prefix"
log "Install include prefix: $includedir"
log "Compilation threads: $threads"
log

# Configure the makefile
log_start "Populating Makefile..."
rm -f Makefile
sed "s#%CXX_PLATFORM_FLAGS%#${cxx_platform_flags}#" ./Makefile.in |\
sed "s#%LD_PLATFORM_LIBS%#${ld_platform_libs}#" |\
sed "s#%PREFIX%#${prefix}#" |\
sed "s#%INCLUDEDIR%#${includedir}#" |\
sed "s#%PROJECT%#${project}#" |\
sed "s#%THREADS%#${threads}#" > Makefile
log_end " done"

log "Done configuring ${project}"

# Describe next steps
log
log "To run tests, use \`make && make test\`"
log "To install headers, use \`make install\` with the appropriate permissions for your prefix"