#! /usr/bin/env bash
# icecc -- A simple distributed compiler system
#
# Copyright (C) 2004 by the Icecream Authors
# GPL

target_files=

is_contained ()
{
  case " $target_files " in
    *" $1 "* ) return 0 ;;
    *"=$1 "* ) return 0;;
    * ) return 1 ;;
  esac
}

add_file ()
{
  local name="$1"
  local path="$1";
  if test -n "$2"; then
    name="$2"
  fi
  test -z "$name" && return
  # ls -H isn't really the same as readlink, but
  # readlink is not portable enough.
  path=`ls -H $path`
  toadd="$name=$path"
  is_contained "$toadd" && return
  if test -z "$silent"; then
  echo "adding file $toadd"
  fi
  target_files="$target_files $toadd"
  if test -x "$path"; then
    # Only call ldd when it makes sense
    if file -L "$path" | grep 'ELF' > /dev/null 2>&1; then
	if ! file -L "$path" | grep 'static' > /dev/null 2>&1; then
	   # ldd now outputs ld as /lib/ld-linux.so.xx on current nptl based glibc
		# this regexp parse the outputs like:
		# ldd /usr/bin/gcc
		#         linux-gate.so.1 =>  (0xffffe000)
		#         libc.so.6 => /lib/tls/libc.so.6 (0xb7e81000)
		#         /lib/ld-linux.so.2 (0xb7fe8000)
		# covering both situations ( with => and without )
          for lib in `ldd "$path" | sed -n 's,^[^/]*\(/[^ ]*\).*,\1,p'`; do
	    test -f "$lib" || continue
	    # Check wether the same library also exists in the parent directory,
	    # and prefer that on the assumption that it is a more generic one.
	    local baselib=`echo "$lib" | sed 's,\(/[^/]*\)/.*\(/[^/]*\)$,\1\2,'`
	    test -f "$baselib" && lib=$baselib
	  add_file "$lib"
        done
      fi
    fi
  fi
}

# backward compat
if test "$1" = "--respect-path"; then
  shift
fi

#add a --silent switch to avoid "broken pipe" errors when calling this scipt from within OE
if test "$1" = "--silent"; then
 silent=1
 shift
fi


added_gcc=$1
shift
added_gxx=$1
shift
added_as=$1
shift
archive_name=$1

if test -z "$added_gcc" || test -z "$added_gxx" ; then
	echo "usage: $0 <gcc_path> <g++_path>"
	exit 1
fi

if ! test -x "$added_gcc" ; then
  echo "'$added_gcc' is no executable."
  exit 1
fi

if ! test -x "$added_gxx" ; then
  echo "'$added_gcc' is no executable."
  exit 1
fi


add_file $added_gcc /usr/bin/gcc
add_file $added_gxx /usr/bin/g++

if test -z "$added_as" ; then
 add_file /usr/bin/as /usr/bin/as
else
 if ! test -x "$added_as" ; then
  echo "'$added_as' is no executable."
  exit 1
 fi

 add_file $added_as  /usr/bin/as
fi

add_file `$added_gcc -print-prog-name=cc1` /usr/bin/cc1
add_file `$added_gxx -print-prog-name=cc1plus` /usr/bin/cc1plus
specfile=`$added_gcc -print-file-name=specs`
if test -n "$specfile" && test -e "$specfile"; then
  add_file "$specfile"
fi

ltofile=`$added_gcc -print-prog-name=lto1`
pluginfile="${ltofile%lto1}liblto_plugin.so"
if test -r "$pluginfile"
then
  add_file $pluginfile  ${pluginfile#*usr}
  add_file $pluginfile  /usr${pluginfile#*usr}
fi

tempdir=`mktemp -d /tmp/iceccenvXXXXXX`
new_target_files=
for i in $target_files; do
 case $i in
   *=/*)
    target=`echo $i | cut -d= -f1`
    path=`echo $i | cut -d= -f2`
    ;;
   *)
    path=$i
    target=$i
    ;;
  esac
  mkdir -p $tempdir/`dirname $target`
  cp -p $path $tempdir/$target
  if test -f $tempdir/$target -a -x $tempdir/$target; then
    strip -s $tempdir/$target 2>/dev/null
  fi
  target=`echo $target | cut -b2-`
  new_target_files="$new_target_files $target"
done

#sort the files
target_files=`for i in $new_target_files; do echo $i; done | sort`

#test if an archive name was supplied
#if not use the md5 of all files as the archive name
if test -z "$archive_name"; then
  md5sum=NONE
  for file in /usr/bin/md5sum /bin/md5 /usr/bin/md5; do
    if test -x $file; then
      md5sum=$file
      break
    fi
  done

  #calculate md5 and use it as the archive name
  archive_name=`for i in $target_files; do test -f $tempdir/$i && $md5sum $tempdir/$i; done | sed -e 's/ .*$//' | $md5sum | sed -e 's/ .*$//'`.tar.gz || {
    if test -z "$silent"; then
     echo "Couldn't compute MD5 sum."
    fi
    exit 2
  }
  mydir=`pwd`
else
  mydir="`dirname "$archive_name"`"

  #check if we have a full path or only a filename
  if test "$mydir" = "." ; then
    mydir=`pwd`
  else
    mydir=""
  fi
fi

if test -z "$silent"; then
echo "creating $archive_name"
fi

cd $tempdir
tar -czhf "$mydir/$archive_name" $target_files || {
 if test -z "$silent"; then
  echo "Couldn't create archive"
 fi
  exit 3
}
cd ..
rm -rf $tempdir