#!/bin/sh

set -e

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

set -x
(
    cd $srcdir
    rm -Rf autom4te*.cache
    aclocal
    autoheader
    autoconf

    # 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
    mv configure .configure-orig
    sed 's/^cache_file=\/dev\/null$/cache_file=.\/config.cache/' .configure-orig > configure
    chmod +x configure
    rm -f .configure-orig                                                              

    automake -a
    ( cd runtime/gasnet && ./Bootstrap y )
    rm -Rf autom4te*.cache
)
rm -f config.cache