#!/bin/bash

# relative path to the cmake source tree directory (contains "CMakeLists.txt")
SRCDIR="."

# relative path to the cmake build tree directory 
BUILDDIR="build"

DIR=$(pwd)

if [[ ! -f "$DIR"/"$SRCDIR"/CMakeLists.txt ]]
then
  echo "$SRCDIR/CMakeLists.txt not found" >&2
  SCRIPTNAME=$(basename "$0" 2>/dev/null || echo "$0")
  echo "please run '$SCRIPTNAME' from its containing directory" >&2
  exit 1
fi

# note: NCORES may be too large on systems with hyperthreading
NCORES=$(grep -c "^processor" /proc/cpuinfo 2>/dev/null)
if [[ ! $NCORES -ge 1 ]]
then
  NCORES=1
fi

mkdir -p "$BUILDDIR"
cd "$BUILDDIR"

cmake "$DIR"/"$SRCDIR"/ && make clean && make -j $NCORES

cd "$DIR"