#!/bin/sh
#   $Source: bitbucket.org:berkeleylab/gasnet.git/Bootstrap $
# Description: GASNet developer Bootstrap script
# Copyright 2004,  Dan Bonachea <bonachea@cs.berkeley.edu>
# Terms of use are as specified in license.txt

set -e

srcdir=`dirname $0`

TIME=
CONFIRM=${GASNET_BOOTSTRAP_CONFIRM:-0}
NOTOOLCHECK=0
TOOLSONLYMODE=0
autofilter="perl -0 -pe 's/^(autoheader.*?: )?WARN.+auxiliary files(.|\n)+WARN.+documentation.\n//m' \
                 | perl -pe 's/^.*?AC_PROG_LEX invoked multiple times.*?\n?$//g' \
                 | perl -pe 's/^.*docdir.*y defined (in condition TRUE|here).*?\n?$//' \
                 | perl -0 -pe 's/^((.*?AC_CONFIG_SUBDIRS.*?\n)+([^ ]* the top level\n)?)*//g'"

for arg in "$@"; do
  case "$arg" in
    -h) echo "Usage: $0 [options]"
    	echo " -v  verbose mode: don't filter benign warnings from autotool output"
    	echo " -t  time autotool commands"
    	echo " -y  force a Bootstrap, even if it looks unnecessary"
    	echo " -n  no checks for autotool presence and versions"
	echo " -o  Bootstrap for tools-only distribution (default is conduit-mode)"
	echo " -T  touch Bootstrap-generated files to make them appear up-to-date"
	exit 1
    	;;
    -T) DOTOUCH=1 ;;
    -v) autofilter=cat ;;
    -y) CONFIRM=1 ;;
    y) CONFIRM=1 ;; # legacy
    -n) NOTOOLCHECK=1 ;;
    n) NOTOOLCHECK=1 ;; # legacy
    -p) ;; # used by Titanium Bootstrap - ignore
    -P) ;; # used by Titanium Bootstrap - ignore
    -o) TOOLSONLYMODE=1 ;;
    -t) TIME='/usr/bin/time'
	if test ! -x "$TIME" ; then
	  TIME=
	fi
	;;
    *) ;; # ignore unrecognized args
  esac
done

if [ "$DOTOUCH" = 1 ]; then
    if [   -r $srcdir/gasnet_config.h.in \
        -a -r $srcdir/Makefile.in \
        -a -r $srcdir/aclocal.m4 \
        -a -r $srcdir/configure \
    ]; then
        echo "Touching Bootstrap-generated files in $srcdir to make them appear up-to-date"
        cd $srcdir
        touch aclocal.m4
        sleep 2
        touch configure gasnet_config.h.in
        sleep 2
        perl -ane 'utime undef, undef, (grep {m/\bMakefile\.in$/ && -f $_} @F);' -- unBootstrap
        exit 0;
    else
        echo "Can't touch generated files because this tree does not appear to be Bootstrapped"
        exit 1;
    fi
fi

DOIT='echo "+ $CMD | \$autofilter" ; ( eval $TIME $CMD 2>&1 || kill $$ ) | eval $autofilter'

if [ \
       -r $srcdir/gasnet_config.h.in \
    -a -r $srcdir/Makefile.in \
    -a -r $srcdir/aclocal.m4 \
    -a -r $srcdir/configure \
    -a "$CONFIRM" != "1" \
    ]; 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

if test "$NOTOOLCHECK" != "1" ; then
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 $autotool`"
  elif test "$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/gasnet_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
fi

set -x
    cd $srcdir
    rm -Rf autom4te*.cache
set +x

    TOOLSONLYFLAG=.gasnet_toolsonly_mode
    TOOLSONLYFILES="configure.in Makefile.am other/Makefile.am"
    if test "$TOOLSONLYMODE" = 1 -a ! -f "$TOOLSONLYFLAG" ; then
      echo "+ Switching source archive to GASNet tools-only mode"
      eval perl other/tools-toggle.pl -y $TOOLSONLYFILES
      touch "$TOOLSONLYFLAG"
    elif test "$TOOLSONLYMODE" = 0 -a -f "$TOOLSONLYFLAG" ; then
      if test ! -d smp-conduit ; then
        echo "+ WARNING: Attempted a conduit-mode Bootstrap, but conduit sources appear to be missing."
        echo "+ WARNING: Assuming you meant to include the -o option for a tools-only distribution."
      else
        echo "+ Switching source archive back from GASNet tools-only mode to regular mode"
        eval perl other/tools-toggle.pl -n $TOOLSONLYFILES
        rm -f "$TOOLSONLYFLAG"
      fi
    fi

    CMD="aclocal -I other/plpa/config" ; eval $DOIT
    CMD="autoheader" ; eval $DOIT
    set -x
      # autoheader omits updating the header if it thinks nothing has changed, 
      # but automake's dependency checks are stronger (include aclocal.m4, which just changed)
      # ensure the header looks up-to-date (autoheader -f option not version portable)
      touch gasnet_config.h.in
    set +x
    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 $top_builddir w/o quoting it.
    # Add quotes around the offending command.
    mv configure .configure-orig
    perl -pe 's@^cache_file=/dev/null$@cache_file=./config.cache@; 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
    # Perform some postprocessing to fix bugs in automake:
    # 1) Overrides: Automake is too stupid to notice several overrides we intentionally perform,
    # leading to spam of harmless warnings of the form:
    #   warning: overriding commands for target X
    #   warning: ignoring old commands for target X
    # Remove the earlier, overridden rule to silence the warning AND remove unwanted dependencies
    # top-level: Makefile and distclean targets, remove all but the last rule (ours)
    perl -0777 -i.bak -pe 's/^(distclean|Makefile):[^\n]*\n(?:\t[^\n]*\n)*(?=.*\n\1:)//msg' Makefile.in
    # conduits: Makefile target defined in included other/Makefile-conduit.mak, just clear the automake one
    perl -0777 -i.bak -pe 's/^Makefile:[^\n]*\n(?:\t[^\n]*\n)*//msg' *-conduit/Makefile.in
    rm -f Makefile.in.bak *-conduit/Makefile.in.bak

    rm -Rf autom4te*.cache
    rm -f config.cache