#! /bin/bash 
#
# $HEADER$
#
# This script is run on developer copies of LAM/MPI -- *not*
# distribution tarballs.


##############################################################################
#
# User-definable parameters (search path and minimum supported versions)
#
##############################################################################

lam_aclocal_search="aclocal"
lam_autoheader_search="autoheader"
lam_autoconf_search="autoconf"
lam_libtoolize_search="libtoolize glibtoolize"
lam_automake_search="automake"

lam_automake_version="1.6"
lam_autoconf_version="2.58"
lam_libtool_version="1.5"


##############################################################################
#
# Global variables - should not need to modify defaults
#
##############################################################################

lam_aclocal_version="$lam_automake_version"
lam_autoheader_version="$lam_autoconf_version"
lam_libtoolize_version="$lam_libtool_version"

# program names to execute
lam_aclocal=""
lam_autoheader=""
lam_autoconf=""
lam_libtoolize=""
lam_automake=""


############################################################################
#
# Version check - does major,minor,release check (hopefully ignoring
# beta et al)
#
# INPUT:
#    - minimum version allowable
#    - version we found
#
# OUTPUT:
#    - 0 version is ok
#    - 1 version is not ok
#
# SIDE EFFECTS:
#    none
#
##############################################################################
check_version() {
    local min_version="$1"
    local version="$2"

    local min_major_version="`echo $min_version | cut -f1 -d.`"
    local min_minor_version="`echo $min_version | cut -f2 -d.`"
    local min_release_version="`echo $min_version | cut -f3 -d.`"
    if test "$min_release_version" = "" ; then
        min_release_version=0
    fi

    local major_version="`echo $version | cut -f1 -d.`"
    local minor_version="`echo $version | cut -f2 -d.`"
    local release_version="`echo $version | cut -f3 -d.`"
    if test "$release_version" = "" ; then
        release_version=0
    fi

    if test $min_major_version -lt $major_version ; then
        return 0
    elif test $min_major_version -gt $major_version ; then
        return 1
    fi

    if test $min_minor_version -lt $minor_version ; then
        return 0
    elif test $min_minor_version -gt $minor_version ; then
        return 1
    fi

    if test $min_release_version -gt $release_version ; then
        return 1
    fi

    return 0
}


##############################################################################
#
# find app - find a version of the given application that is new
# enough for use
#
# INPUT:
#    - name of application (eg aclocal)
#
# OUTPUT:
#    none
#
# SIDE EFFECTS:
#    - sets application_name variable to working executable name
#    - aborts on error finding application
#
##############################################################################
find_app() {
    local app_name="$1"

    local version="0.0.0"
    local min_version="99.99.99"
    local found=0

    eval "min_version=\"\$lam_${app_name}_version\""

    eval "search_path=\"\$lam_${app_name}_search\""
    for i in $search_path ; do
        version="`${i} --version 2>&1`"
        if test "$?" != 0 ; then
            continue
        fi

        version="`echo $version | cut -f2 -d')'`"
        version="`echo $version | cut -f1 -d' '`"

        if check_version $min_version $version ; then
            eval "lam_${app_name}=\"${i}\""
            found=1
            break
        fi
    done

    if test "$found" = "0" ; then
	cat <<EOF
I could not find a recent enough copy of ${app_name}.
I am gonna abort.  :-(

Please make sure you are using at least the following versions of the
GNU tools:

GNU Autoconf $lam_autoconf_version
GNU Automake $lam_automake_version
GNU Libtool  $lam_libtool_version

EOF
        exit 1
    fi
}


##############################################################################
#
# run_and_check - run the right GNU tool, printing warning on failure
#
# INPUT:
#    - name of application (eg aclocal)
#    - program arguments
#
# OUTPUT:
#    none
#
# SIDE EFFECTS:
#    - aborts on error running application
#
##############################################################################
run_and_check() {
    local rac_progs="$*"
    echo "[Running] $rac_progs"
    eval $rac_progs
    if test "$?" != 0; then
	cat <<EOF

It seems that the execution of "$rac_progs" has failed.
I am gonna abort.  :-(

This may be caused by an older version of one of the required
packages.  Please make sure you are using at least the following
versions:

GNU Autoconf $lam_autoconf_version
GNU Automake $lam_automake_version
GNU Libtool  $lam_libtool_version

EOF
	exit 1
    fi
}

##############################################################################
#
# find_and_delete -  look for standard files in a number of common places
#     (e.g., ./config.guess, config/config.guess, dist/config.guess), and
#     delete it.  If it's not found there, look for AC_CONFIG_AUX_DIR in
#     the configure.in script and try there.  If it's not there, oh well.
#
# INPUT:
#    - file to delete
#
# OUTPUT:
#    none
#
# SIDE EFFECTS:
#    - files may disappear
#
##############################################################################
find_and_delete() {
    local fad_file="$1"

    local fad_cfile
    local auxdir

    # Look for the file in "standard" places

    if test -f $fad_file; then
	rm -f $fad_file
    elif test -d config/$fad_file; then
	rm -f config/$fad_file
    elif test -d dist/$fad_file; then
	rm -f dist/$fad_file
    else

	# Didn't find it -- look for an AC_CONFIG_AUX_DIR line in
	# configure.[in|ac]

	if test -f configure.in; then
	    fad_cfile=configure.in
	elif test -f configure.ac; then
	    fad_cfile=configure.ac
	else
	    echo "--> Errr... there's no configure.in or configure.ac file!"
	fi
	if test -n "$fad_cfile"; then
	    auxdir="`grep AC_CONFIG_AUX_DIR $fad_cfile | cut -d\( -f 2 | cut -d\) -f 1`"
	fi	
	if test -f "$auxdir/$fad_file"; then
	    rm -f "$auxdir/$fad_file"
	fi
    fi
}


##############################################################################
#
# run_gnu_tools - run the GNU tools on a given directory
#
# INPUT:
#    - directory to run in
#    - LAM top directory
#
# OUTPUT:
#    none
#
# SIDE EFFECTS:
#    - skips directories with .lam_no_gnu .lam_ignore
#    - uses provided autogen.sh if available
#
##############################################################################
run_gnu_tools() {
    rgt_dir="$1"
    rgt_lam_topdir="$2"
    rgt_cur_dir="`pwd`"
    if test -d "$rgt_dir"; then
	cd "$rgt_dir"

	# See if the package doesn't want us to set it up

	if test -f .lam_no_gnu; then
	    cat <<EOF

*** Found .lam_no_gnu file -- skipping GNU setup in:
***   `pwd`

EOF
	elif test -f .lam_ignore; then
	    cat <<EOF

*** Found .lam_ignore file -- skipping entire tree:
***   `pwd`

EOF
	elif test "$rgt_dir" != "." -a -x autogen.sh; then
	    cat <<EOF

*** Found custom autogen.sh file in:
***   `pwd`

EOF
	    ./autogen.sh
        else
	    cat <<EOF

*** Running GNU tools in directory: 
***   `pwd`

EOF
	    # Sanity check to ensure that there's a configure.in or
	    # configure.ac file here, or if there's a configure.params
	    # file and we need to run make_configure.pl.

	    if test -f configure.params -a \
		-x "$rgt_lam_topdir/config/mca_make_configure.pl"; then
		echo "--> Found configure.params.  Running mca_make_configure.pl"
		"$rgt_lam_topdir/config/mca_make_configure.pl" \
		    --lamdir "$rgt_lam_topdir" \
		    --moduledir "`pwd`"
                if test "$?" != "0"; then
                    echo "*** autogen.sh failed to complete!"
                    exit 1
                fi
		happy=1
		file=configure.ac
	    elif test -f configure.in; then
		happy=1
		file=configure.in
	    elif test -f configure.ac; then
		happy=1
		file=configure.ac
	    else
		echo "---> Err... there's no configure.in or configure.ac file in this directory"
		echo "---> I'm confused, so I'm going to abort"
		exit 1
	    fi
	    unset happy

	    # Find and delete the GNU helper script files

	    find_and_delete config.guess
	    find_and_delete config.sub
	    find_and_delete depcomp
	    find_and_delete install-sh
	    find_and_delete ltconfig
	    find_and_delete ltmain.sh
	    find_and_delete missing
	    find_and_delete mkinstalldirs
	    find_and_delete libtool

            # Run the GNU tools

	    run_and_check $lam_aclocal
	    if test "`grep AC_CONFIG_HEADER $file`" != "" -o \
		"`grep AM_CONFIG_HEADER $file`" != ""; then
		run_and_check $lam_autoheader
	    fi
	    run_and_check $lam_autoconf

	    # We only need the libltdl stuff for the top-level
	    # configure, not any of the MCA modules.

	    if test -f src/include/mpi.h; then
		rm -rf libltdl src/mca/libltdl src/mca/ltdl.h
		run_and_check $lam_libtoolize --automake --copy --ltdl
		mv libltdl src/mca

		echo "Adjusting libltdl for LAM :-("

		echo "  -- adding sym link for src/mca/ltdl.h"
                cd src/mca
		ln -s libltdl/ltdl.h ltdl.h
                cd ../..

		echo "  -- patching for argz bugfix in libtool 1.5"
		cd src/mca/libltdl
		patch -p0 <<EOF
--- ltdl.c.old  2003-11-26 16:42:17.000000000 -0500
+++ ltdl.c      2003-12-03 17:06:27.000000000 -0500
@@ -682,7 +682,7 @@
   /* This probably indicates a programmer error, but to preserve
      semantics, scan back to the start of an entry if BEFORE points
      into the middle of it.  */
-  while ((before >= *pargz) && (before[-1] != LT_EOS_CHAR))
+  while ((before > *pargz) && (before[-1] != LT_EOS_CHAR))
     --before;

   {
EOF
		cd ../../..
		echo "  -- patching configure for broken -c/-o compiler test"
		sed -e 's/chmod -w \./#LAM\/MPI FIX: chmod -w ./' \
		    configure > configure.new
		mv configure.new configure
		chmod a+x configure
	    else
		run_and_check $lam_libtoolize --automake --copy
	    fi
	    run_and_check $lam_automake --foreign -a --copy --include-deps
	fi
	
	# Go back to the original directory

	cd "$rgt_cur_dir"
    fi
    unset rgt_dir rgt_cur_dir
}


##############################################################################
#
# run_global - run the config in the top LAM dir and all MCA modules
#
# INPUT:
#    none
#
# OUTPUT:
#    none
#
# SIDE EFFECTS:
#
##############################################################################
run_global() {
    # Run the config in the top-level directory

    run_gnu_tools . .

    # Now run the config in every directory in src/mca/[lam|mpi]/*/*
    # that has a configure.in or configure.ac script

    rg_cwd="`pwd`"
    echo $rg_cwd
    for type in src/mca/lam/* src/mca/mpi/*; do
	if test -d "$type"; then
	    for module in "$type"/*; do
		if test -d "$module"; then
		    if test -f "$module/configure.in" -o \
			-f "$module/configure.params" -o \
			-f "$module/configure.ac"; then
			run_gnu_tools "$module" "$rg_cwd"
		    fi
		fi
	    done
	fi
    done
    unset type module
}


##############################################################################
#
# main - do the real work...
#
##############################################################################

# announce
echo "[Checking] command line parameters"

# Check the command line to see if we should run the whole shebang, or
# just in this current directory.

want_local=no
lamdir=
for arg in $*; do
    case $arg in
    -l) want_local=yes ;;
    -lamdir|--lamdir|-lam|--lam) lamdir="$1" ;;
    *) ;;
    esac
done

# announce
echo "[Checking] prerequisites"

# sanity check to make sure user isn't being stupid
if test ! -d CVS ; then
    cat <<EOF

This doesn't look like a developer copy of LAM/MPI.  You probably do not
want to run autogen.sh - it is normally not needed for a release source
tree.  Giving you 5 seconds to reconsider and kill me.

EOF
    sleep 5
fi

# figure out if we're at the top level of the LAM tree, a module's
# top-level directory, or somewhere else.
if test -f VERSION -a -f configure.ac -a -f src/include/mpi.h ; then
    # Top level of LAM tree
    lamdir="`pwd`"
elif test -f configure.in -o -f configure.ac -o -f configure.params ; then
    # Top level of a module directory
    want_local=yes
    if test -z "$lamdir"; then
        lamdir="../../../../.."
    fi
else
    cat <<EOF

You must run this script from either the top level of the LAM
directory tree or the top-level of an MCA module directory tree.

EOF
    exit 1
fi

# find all the apps we are going to run
find_app "aclocal"
find_app "autoheader"
find_app "autoconf"
find_app "libtoolize"
find_app "automake"

# do the work
if test "$want_local" = "yes"; then
    run_gnu_tools . $lamdir
else
    run_global
fi

# All done
exit 0