configure

#! /bin/sh

# adapted from ocamlnet's configure

#######################################################################
# Helpers:

# Split $PATH into words:
oldifs="$IFS"
IFS="   :"
spacepath=`echo $PATH`
IFS="$oldifs"


in_path () {
    # Does $1 exist in $PATH?
    for d in $spacepath; do
        if test -x "$d/$1"; then
            return 0
        fi
    done
    return 1
}


get_path () {
    for d in $spacepath; do
        if test -x "$d/$1"; then
            echo "$d/$1"
            return
        fi
    done
}

#######################################################################
# Defaults

#--- Options ---
# value 0: off
# value 1: on
# defaults:

set_defaults () {
    bindir=`dirname $ocamlc`
    libdir=`ocamlc -where`
}

ocamlc=`get_path ocamlc`
set_defaults

version="0.3"
exec_suffix=""

#######################################################################
# Option parsing

# Packages to include anyway:
requires="ulex"

check_library () {
    # $1: the name of the library (findlib)
	ocamlfind query "$1" >/dev/null 2>/dev/null
	return
}

library_version () {
    # $1: the name of the library (findlib)
	ocamlfind query -format "%v" "$1" 2>/dev/null
	return
}

absolute_dir () {
    case $1 in
        /*) echo $1 ;;
        *) echo `pwd`/$1 ;;
    esac
}

print_options () {
	echo "    -bindir $bindir"
	echo "    -libdir $libdir"
	if [ "x$srcdir" != x ]; then echo "    -srcdir $srcdir"; fi
	if [ "x$srcdir_ounit" != x ]; then echo "    -srcdir-ounit $srcdir_ounit"; fi
	if [ "x$srcdir_lwt" != x ]; then echo "    -srcdir-lwt $srcdir_lwt"; fi
}


usage () {
	set_defaults
	cat <<_EOF_ >&2
usage: ./configure [ options ]

_EOF_
	cat <<_EOF_ >&2
-srcdir dir
        OCaml source is in this directory (default ../ocaml-\$VERSION)

-srcdir-lwt dir
        Lwt source is in this directory (default ../lwt-\$VERSION)

-srcdir-ounit dir
        OUnit source is in this directory (default ../ounit-\$VERSION)

-bindir dir
        Install binaries into this directory (default same as ocamlc)

-libdir dir
        Install libraries into this directory (default same as ocamlc -where)

Defaults are:

_EOF_
	print_options >&2
	exit 1
}


echo "Welcome to ocamljs version $version" >&2

while [ "$#" -gt 0 ]; do
	case "$1" in
                -bindir)
                        bindir="$2"
                        shift
                        shift
                        ;;
                -libdir)
                        libdir="$2"
                        shift
                        shift
                        ;;
                -srcdir)
                        srcdir="$2"
                        shift
                        shift
                        ;;
                -srcdir-ounit)
                        srcdir_ounit="$2"
                        shift
                        shift
                        ;;
                -srcdir-lwt)
                        srcdir_lwt="$2"
                        shift
                        shift
                        ;;
		-version)
			echo "$version"
			exit 0
			;;
		*)
			usage
	esac
done

# Sanity checks

case "$bindir" in
  /*) ;;
  "") ;;
   *) echo "The -bindir directory must be absolute." 1>&2; exit 2;;
esac
case "$libdir" in
  /*) ;;
  "") ;;
   *) echo "The -libdir directory must be absolute." 1>&2; exit 2;;
esac

######################################################################
# Check OCaml version and source

printf "%s" "Checking OCaml version... "
ocamlc_version=`ocamlc -version`
case $ocamlc_version in
    3.11.0 | 3.11.1 | 3.11.2 | 3.12.0)
        echo "ok, $ocamlc_version";;
    *)
        echo "unsupported version $ocamlc_version"
        echo "Sorry, ocamljs needs OCaml version 3.11.x or 3.12.0."
        echo "Download OCaml from http://caml.inria.fr/download.en.html"
        exit 1;;
esac


printf "%s" "Checking for OCaml source... "
x=${srcdir:=`absolute_dir "../ocaml-$ocamlc_version"`}
if [ -f $srcdir/VERSION ]; then
    src_version=`head -1 $srcdir/VERSION`
    if [ "$src_version" != "$ocamlc_version" ]; then
        echo "source version $src_version != $ocamlc_version"
        echo "You need to set -srcdir to a version $ocamlc_version OCaml source tree."
        echo "Download OCaml from http://caml.inria.fr/download.en.html"
        exit 1
    else
        echo "found"
    fi
else
    echo "not found"
    echo "You need to set -srcdir to a version $ocamlc_version OCaml source tree."
    echo "Download OCaml from http://caml.inria.fr/download.en.html"
    exit 1
fi

######################################################################
# Check ocamlfind

printf "%s" "Checking for findlib... "
if check_library stdlib; then
    echo "found"
else
    echo "not found"
    echo "Download findlib from http://projects.camlcity.org/projects/findlib.html"
    exit 1
fi

######################################################################
# Check ulex

printf "%s" "Checking for ulex... "
if check_library ulex; then
    echo "found"
else
    echo "not found"
    echo "Download ulex from http://www.cduce.org/download.html#side"
    exit 1
fi

######################################################################
# Check Ounit

printf "%s" "Checking for Ounit... "
has_ounit=0
if check_library oUnit; then
    ounit_version=`library_version oUnit`

    printf "%s" "checking for source... "
    x=${srcdir_ounit:=`absolute_dir "../ounit-$ounit_version"`}
    if [ -d $srcdir_ounit ]; then
        # XXX check version
        has_ounit=1
        echo "found"
    else
        srcdir_ounit=""
        echo "$srcdir_ounit not found, continuing"
        echo "Download ounit from http://www.xs4all.nl/~mmzeeman/ocaml/"
    fi
else
    echo "not found, continuing"
    echo "Download ounit from http://www.xs4all.nl/~mmzeeman/ocaml/"
fi

######################################################################
# Check Lwt

printf "%s" "Checking for Lwt... "
has_lwt=0
if check_library lwt; then
    lwt_version=`library_version lwt`

    printf "%s" "checking for source... "
    x=${srcdir_lwt:=`absolute_dir "../lwt-$lwt_version"`}
    if [ -d $srcdir_lwt ]; then
        # XXX check version
        has_lwt=1
        echo "found"
    else
        srcdir_lwt=""
        echo "not found, continuing"
        echo "Download lwt from http://ocsigen.org/lwt/install"
    fi
else
    echo "not found, continuing"
    echo "Download lwt from http://ocsigen.org/lwt/install"
fi

######################################################################
# Summary

echo
echo "Effective options:"
print_options
echo

pkglist="jslib jscomp ocamljs stdlib javascript mozilla dom gmaps jquery"

if [ $has_ounit -gt 0 ]; then
  pkglist="$pkglist ounit"
fi

if [ $has_lwt -gt 0 ]; then
  pkglist="$pkglist lwt lwt-dom"
fi

######################################################################
# Configure OCaml

printf "%s" "Configuring OCaml... "
rm -f ocaml; ln -s $srcdir ocaml
(cd ocaml; make clean; ./configure -bindir $bindir -libdir $libdir)  >/dev/null 2>&1
echo "done"

######################################################################
# Write Makefile.conf

echo "Writing Makefile.conf"
cat <<_EOF_ >Makefile.conf
# Makefile.conf written by configure
# The ocamljs version
VERSION = $version

# The packages to build in the right order:
PKGLIST = $pkglist

# Required packages (findlib):
REQUIRES = $requires

# Where binaries are installed:
BINDIR = $bindir

# Where libraries are installed:
LIBDIR = $libdir

OCAML_VERSION = $ocamlc_version

SRCDIR_OUNIT = $srcdir_ounit
SRCDIR_LWT = $srcdir_lwt

VERSIONS=3.11.0 3.11.1 3.11.2 3.12.0
_EOF_

######################################################################
# Finish

echo
echo "Please check Makefile.conf."
echo
echo "You can now compile ocamljs by invoking"
echo "   make all"
echo "Finally, a"
echo "   make install"
echo "will install the package(s)."