#!/bin/sh

HAVE_PRCS="`which prcs 2> /dev/null`" # must precede -e
set -e

autofilter="perl -0 -pe 's/^(autoheader.*?: )?WARN.+auxiliary files(.|\n)+WARN.+documentation.\n//m' \
                 | perl -pe 's/^.*?AC_PROG_LEX invoked multiple times.*?\n?$//g' \
                 | perl -0 -pe 's/^((.*?AC_CONFIG_SUBDIRS.*?\n)+([^ ]* the top level\n)?)*//g'"
DOIT='echo "+ $CMD | \$autofilter" ; ( eval $CMD 2>&1 || kill $$ ) | eval $autofilter'

srcdir=`dirname $0`
if [ \
       -r $srcdir/config.h.in \
    -a -r $srcdir/Makefile.in \
    -a -r $srcdir/aclocal.m4 \
    -a -r $srcdir/configure \
    -a "$1" != "y" \
    ]; then
    echo 'The "Bootstrap" script need only be used on a'
    echo 'completely clean, fresh source tree.  After the'
    echo 'first build, you should just use "make" or "gmake".'
    echo
    echo 'It looks as though you have already bootstrapped'
    echo 'this source tree.  You should only bootstrap it'
    echo 'again if the makefiles or configuration files are'
    echo 'broken and "make" or "gmake" do not work properly.'
    echo
    echo 'Are you sure you want to re-bootstrap this tree?'
    echo

    case `echo -n` in
      '')  n='-n' c='' ;;
      *)   n=''   c='\c' ;;
    esac

    echo $n "[y/n]: $c"
    read redo

    case $redo in
      y* ) ;;
      *  ) exit 1;
    esac
fi

cd $srcdir
missing=
for autotool in autoconf autoheader automake aclocal m4 ; do
  info=`( $autotool --version 2>/dev/null < /dev/null || echo 'Not found' ) | head -1`
  if test "$info" != "Not found" ; then
    info="$info, in `which $autotool`"
  elif "$autotool" != "m4" ; then
    missing="$missing$autotool "
  fi
  echo "$autotool:	$info"
done
if test "$missing" != ""; then
  echo "The following GNU autotools are missing from your PATH:"
  echo "   $missing"
  if test -r $srcdir/config.h.in \
    -a -r $srcdir/Makefile.in \
    -a -r $srcdir/aclocal.m4 \
    -a -r $srcdir/configure ; then
    echo "However, it appears this directory has already been Bootstrapped."
    echo "You should skip Bootstrap and instead do: configure ; gmake"
  else
    echo "Please download them from ftp://ftp.gnu.org/gnu"
  fi
  exit 1
fi
if test -f titaniumc.prj -a -d /project/cs/titanium/a/PRCS -a -x "$HAVE_PRCS" ; then
  echo "prcs rekey -f titaniumc.prj configure.in"
  prcs rekey -f titaniumc.prj configure.in
  chmod -R og-rwx . 2>&1 > /dev/null
fi
set -x
(
    rm -Rf autom4te*.cache
)
set +x
    CMD="aclocal -I runtime/gasnet" ; eval $DOIT
    CMD="autoheader" ; eval $DOIT
    CMD="autoconf" ; eval $DOIT
set -x
(

    # Perform some postprocessing to fix bugs in the configure script:
    # 1) caching:
    # Our configure script requires caching, and autoconf 2.5 stupidly disables
    # caching by default. Caching may open some dangers of stale values, but
    # the alternative is worse - automake reconfiguring in the absence of
    # precious environment variables leads to silent incorrect behavior that
    # can't be detected or fixed because there's no cache!
    # Restore ./config.cache as the default cache
    # 2) recursive configure:
    # When $top_builddir contains a space, the configure script tries to cd
    # back to $top_builddir w/o quoting it.
    # Add quotes around the offending command.
    mv configure .configure-orig
    sed -e 's/^cache_file=\/dev\/null$/cache_file=.\/config.cache/' \
        -e 's/cd $ac_popdir/cd "$ac_popdir"/' \
        .configure-orig > configure
    chmod +x configure
    rm -f .configure-orig                                                              
)

set +x
    CMD="automake -a" ; eval $DOIT
set -x 
(
    echo ------------  running GASNet Bootstrap --------------
    ( cd runtime/gasnet && ./Bootstrap y n )
    echo -----------------------------------------------------
    rm -Rf autom4te*.cache
)
rm -f config.cache