#! /usr/bin/env bash

# this is a script around make which basicly checks
# if it's in srcdir or in builddir and changes to 
# the right directory for calling /usr/bin/make
# (C) Stephan Kulow

# Variable replacement code by Allen Winter <allen.winter@kdab.com>
# Copyright (c) 2011 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.net>

# You may need to set OBJ_REPLACEMENT variable to get it to work.
# In the variable use the sed syntax to switch directories, for example
# export OBJ_REPLACEMENT="s:/home/zack/cvs/kde:/home/zack/build:"
# will assure that the builds are performed under /home/zack/build
# directory, when the cvs is held under /home/zack/cvs/kde.

# Variables:
#  %BRANCH% with the name of the Git or SVN branch you are in (as applicable)
#  %GITBRANCH% with the name of the Git branch you are in (empty if not in a Git branch)
#  %SVNBRANCH% with the name of the SVN branch you are in (empty if not in an SVN branch)
#  %CC% with the basename of your C compiler set in $CC (gcc if empty)
#  %CXX% with the basename of your C++ compiler set in $CXX (g++ if empty)
#  %ARCH% with the machine architecture (i.e. 'uname -m')
#  %OS% with the operating system name (i.e. 'uname -o'), in lower-case without "GNU"

function findup() {
  parg="$1"
  _git=""
  spwd=$PWD
  if test -z "$parg"; then return 1; fi

  while ! test -e "$parg"; do
   cd ..
   if test "$PWD" = "/"; then
     cd $spwd
     return 1
   fi
  done
  _git=$PWD/$parg
  cd $spwd
}

function gitbranch() {
  findup .git
  if test -n "$_git"; then
    _gitbranch=`sed -e 's,.*/,,' $_git/HEAD`
  fi
}

function svnbranch() {
  if test -d ".svn"; then
    _root=`svn info . | grep "Repository Root:" | awk '{print $3}'`
    _baseurl=`svn info . | grep URL: | awk '{print $2}' | sed -e s,$_root/,,`
    _svnbranch=`echo $_baseurl | awk -F/ '{print $1}'`
  fi
}

function branch() {
  gitbranch
  if test -z "$_gitbranch"; then
    svnbranch
    if test -z "$_svnbranch"; then
      _branch=""
    else
      _branch=$_svnbranch
    fi
  else
    _branch=$_gitbranch
  fi
}

file=Makefile
dir=.
args=()

_branch=""
_gitbranch=""
_svnbranch=""

while test $# -gt 0 ; do
   case "${1}" in
      -f)
	shift
	file="${1}" 
	shift 
	args=("${args[@]}" -f $file)
	;;
      -C)
	shift
	dir="${1}"
	shift ;;
      -v)
        shift
        exec /usr/bin/make "${args[@]}" -v $@
        ;;
      *)
	args=("${args[@]}" "$1")
	shift 
	;;
    esac
done

cd "$dir"
dir=.
cwd=$PWD

# No CMakeList and no Makefile (and no .pro file either)? Maybe we need to go up then.
while test ! -f CMakeLists.txt && test ! -f Makefile; do
    if test "`ls -1 *.pro 2>/dev/null`" && test -n "`ls -1 ../*.pro 2>/dev/null`"; then
        break;
    fi
    dir="$dir/`basename $PWD`"
    cd ..
    if test "$PWD" = "/"; then
        cd "$cwd"
        break
    fi
done

if test ! -f $file; then
  branch
  if test -n "$CC"; then
    tmp=`echo $CC | awk '{print $1}'`
    _cc="`basename $tmp`"
  else
    _cc="gcc"
  fi
  if test -n "$CXX"; then
    tmp=`echo $CXX | awk '{print $1}'`
    _cxx="`basename $tmp`"
  else
    _cxx="g++"
  fi
  _arch="`uname -m`"
  _os="`uname -o | tr '[A-Z]' '[a-z]' | sed -e s+gnu/++`"

  if test -n "$OBJ_SUBDIR"; then
    OBJ_SUBDIR=`echo $OBJ_SUBDIR | \
                sed -e s+%BRANCH%+"$_branch"+g | \
                sed -e s+%GITBRANCH%+"$_gitbranch"+g | \
                sed -e s+%SVNBRANCH%+"$_svnbranch"+g | \
                sed -e s,%CC%,"$_cc",g | \
                sed -e s,%CXX%,"$_cxx",g | \
                sed -e s,%ARCH%,"$_arch",g | \
                sed -e s,%OS%,"$_os",g`
    dir=$PWD
    subdir=.
    while test ! -f $dir/$OBJ_SUBDIR/$file; do
       subdir=`basename $dir`"/$subdir"
       dir=`dirname $dir`
       if test "$dir" = "/"; then
         # the case that someone puts the compile dir in /
         # is very unlikely, so we better skip here ;)
         echo "can't find $OBJ_SUBDIR above current dir"
         exit 1
       fi
    done
    cd $dir/$OBJ_SUBDIR/$subdir
  else
    if test -n "$OBJ_REPLACEMENT"; then
      OBJ_REPLACEMENT=`echo $OBJ_REPLACEMENT | \
                sed -e s+%BRANCH%+"$_branch"+g | \
                sed -e s+%GITBRANCH%+"$_gitbranch"+g | \
                sed -e s+%SVNBRANCH%+"$_svnbranch"+g | \
                sed -e s,%CC%,"$_cc",g | \
                sed -e s,%CXX%,"$_cxx",g | \
                sed -e s,%ARCH%,"$_arch",g | \
                sed -e s,%OS%,"$_os",g`
      pwd=`echo $PWD | sed -e "$OBJ_REPLACEMENT"`
      if test ! -f $pwd/$file; then
         # No objdir found. But if "make" will work in srcdir, then go ahead; might be a non-kde project.
         test -f $pwd/GNUmakefile && file=GNUmakefile
         test -f $pwd/makefile && file=makefile
         if ! test -f "$pwd/$file"; then
           echo "no objdir found. Tried $pwd"
           exit 1
         fi
      fi
      cd $pwd
    fi
  fi
fi

echo "makeobj[0]: Entering directory \`$PWD'"
if test -z "$MAKE"; then
    using_new_unsermake=0
    if head -n 1 $file | grep unsermake >/dev/null; then
        using_new_unsermake=1
    fi
    if head -n 1 $file | grep automake >/dev/null; then
        using_new_unsermake=0
    fi
    if test $using_new_unsermake -eq 1; then
        MAKE=`type -p unsermake`
	if test ! -x "$MAKE"; then
		echo 'Makefile was created with unsermake, but there'
		echo 'is no unsermake in $PATH'
		exit 1
	fi
    else
        MAKE=/usr/bin/make
    fi
fi
LANG=en_US.UTF-8 $MAKE "${args[@]}"
retval=$?
echo "makeobj[0]: Leaving directory \`$PWD'"
exit $retval