configure

#! /bin/bash
###########################################################################
##                                                                       ##
##                               OCamlCC                                 ##
##                                                                       ##
##                    Michel Mauny, Benoit Vaugon                        ##
##                          ENSTA ParisTech                              ##
##                                                                       ##
##    This file is distributed under the terms of the CeCILL license.    ##
##    See file LICENSE-en.                                               ##
##                                                                       ##
###########################################################################

function error () {
    echo "$@" 1>&2
    exit 1
}

function usage () {
    echo "$@" 1>&2
    error "Usage: $0 [ -prefix <dir> ] [ -bindir <dir> ] [ -includedir <dir> ] [ -mandir <dir> ]"
}

function check_command () {
    which "$1" > /dev/null
    if [ $? -ne 0 ]; then
	error "Error: \"$1\" not installed"
    fi
}

function check_absolute_path () {
    case "$1" in
        /*);;
        *) error "Error: \"$1\" is not an absolute path";;
    esac
}

function remove_trailing_slash () {
    echo "$1" | sed 'sX^\(.*[^/]\)/*$X\1X'
}

###

cd $(dirname "$0")
mkdir -p bin etc dist

###

check_command "ocamlbuild"
check_command "ocamlc"
check_command "mkdir"
check_command "echo"
check_command "grep"
check_command "pwd"
check_command "sed"
check_command "cp"
check_command "rm"
check_command "gcc"

###

OCAML_VERSION=$(ocamlc -version | cut -c1-4)
DEFAULT_RUNTIME_VERSION=''
RUNTIME_VERSIONS=''
for d in runtime/ocamlcc-byterun-?.??; do
    V="${d:24:4}"
    RUNTIME_VERSIONS="$RUNTIME_VERSIONS $V"
    if [ "$OCAML_VERSION" = "$V" ]; then
        DEFAULT_RUNTIME_VERSION="$OCAML_VERSION"
    fi
done
if [ "$OCAML_VERSION" != "$DEFAULT_RUNTIME_VERSION" ]; then
    echo "Error: Incompatible OCaml version: $OCAML_VERSION" 1>&2
    echo "       Supported versions: $RUNTIME_VERSIONS" 1>&2
    exit 1
fi
RUNTIME_VERSION_LIST='['
for v in $RUNTIME_VERSIONS; do
    RUNTIME_VERSION_LIST="$RUNTIME_VERSION_LIST \"$v\";"
done
RUNTIME_VERSION_LIST="$RUNTIME_VERSION_LIST ]"

###

OCAMLBUILD=$(which ocamlbuild)
OCAMLLIB=$(ocamlc -where)
GCC=$(which gcc)
ARCH=$(test -x /bin/uname && /bin/uname -m || echo none)
VERSION=$(cat VERSION)
SAVED_PWD=$(pwd)

###

BINDIR=/usr/local/bin
INCLUDEDIR=/usr/local/include
MANDIR=/usr/local/man

while [ $# -ne 0 ]; do
    case "$1" in
	-bindir)
            check_absolute_path "$2"
            BINDIR="$(remove_trailing_slash $2)" ;;
        -includedir)
            check_absolute_path "$2"
            INCLUDEDIR="$(remove_trailing_slash $2)" ;;
	-mandir)
            check_absolute_path "$2"
            MANDIR="$(remove_trailing_slash $2)" ;;
	-prefix)
            check_absolute_path "$2"
            PREFIX="$(remove_trailing_slash $2)"
	    BINDIR="$2"/bin
            INCLUDEDIR="$2"/include
	    MANDIR="$2"/man ;;
	*)
	usage "Don't know what to do with \"$1\"" ;;
    esac
    shift
    shift
done

CCOMP="$GCC"

###

OCAMLCLEAN_LOCAL_VERSION=$(
    echo ocamlclean/ocamlclean-*.tar.bz2 | \
        sed 'sX.*ocamlclean/ocamlclean-\(.*\)\.tar\.bz2$X\1X'
)
INSTALLED_OCAMLCLEAN="$(which ocamlclean 2> /dev/null)"
if [ $? -eq 0 ]; then
    INSTALLED_OCAMLCLEAN_VERSION=$("$INSTALLED_OCAMLCLEAN" -version)
    if [ $INSTALLED_OCAMLCLEAN_VERSION '<' $OCAMLCLEAN_LOCAL_VERSION ]; then
        echo -n "Warning: an old OCamlClean version is already installed: "
        echo  "$INSTALLED_OCAMLCLEAN_VERSION"
        echo  -n "  => configure new embedded OCamlClean version: "
        echo "$OCAMLCLEAN_LOCAL_VERSION"
        INSTALL_OCAMLCLEAN=true
        if [ "$INSTALLED_OCAMLCLEAN" != "$BINDIR/ocamlclean" ]; then
            echo -n "Warning: OCamlClean was installed in: "
            echo "$INSTALLED_OCAMLCLEAN"
            echo -n "  The new version will be installed in: "
            echo "$BINDIR/ocamlclean"
        fi
    else
        INSTALL_OCAMLCLEAN=false
        OCAMLCLEAN="$INSTALLED_OCAMLCLEAN"
        OCAMLCLEAN_VERSION="$INSTALLED_OCAMLCLEAN_VERSION"
        OCAMLCLEAN_DIRECTORY="-none-"
        OCAMLCLEAN_ARCHIVE="-none-"
    fi
else
    echo -n "Warning: OCamlClean not installed => configure OCamlClean "
    echo "$OCAMLCLEAN_LOCAL_VERSION"
    INSTALL_OCAMLCLEAN=true
fi

if [ $INSTALL_OCAMLCLEAN = true ]; then
    OCAMLCLEAN="$BINDIR/ocamlclean"
    OCAMLCLEAN_VERSION="$OCAMLCLEAN_LOCAL_VERSION"
    OCAMLCLEAN_DIRECTORY="$SAVED_PWD/ocamlclean/ocamlclean-$OCAMLCLEAN_VERSION"
    OCAMLCLEAN_ARCHIVE="$OCAMLCLEAN_DIRECTORY.tar.bz2"
    cd "ocamlclean"
    tar jxf "$OCAMLCLEAN_ARCHIVE"
    cd "$OCAMLCLEAN_DIRECTORY"
    ./configure -bindir "$BINDIR" -mandir "$MANDIR"
    cd "$SAVED_PWD"
fi

###

echo "\
SHELL = bash

INSTALL_OCAMLCLEAN = $INSTALL_OCAMLCLEAN
OCAMLCLEAN = $OCAMLCLEAN
OCAMLCLEAN_VERSION = $OCAMLCLEAN_VERSION
OCAMLCLEAN_DIRECTORY = $OCAMLCLEAN_DIRECTORY
OCAMLCLEAN_ARCHIVE = $OCAMLCLEAN_ARCHIVE
VERSION = $VERSION
RUNTIME_VERSIONS = $RUNTIME_VERSIONS
DEFAULT_RUNTIME_VERSION = $DEFAULT_RUNTIME_VERSION

OCAMLBUILD = $OCAMLBUILD -cflags -w,Ae,-warn-error,A -lflags -w,Ae,-warn-error,A -no-links -classic-display

BINDIR = $BINDIR
INCLUDEDIR = $INCLUDEDIR/ocamlcc
MAN1DIR = $MANDIR/man1
" > etc/Makefile.conf

###

echo "\
(* Generated by configure *)
let version = \"$VERSION\";;
let runtime_versions = $RUNTIME_VERSION_LIST;;
let default_runtime_version = \"$DEFAULT_RUNTIME_VERSION\";;
let include_dir = \"$INCLUDEDIR/ocamlcc\";;
let default_arch = \"gen\";;
let ccomp = \"$CCOMP\";;
let ocamlclean = \"$OCAMLCLEAN\";;
" > etc/config.ml

###

cp "$OCAMLLIB/caml/config.h" "./etc/config.h"

###

echo "** OCamlCC configuration completed successfully **"