configure

#! /bin/bash

cd $(dirname "$0")

################################################################################

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

function usage () {
    echo "$@" 1>&2
    error "Usage: $0 [ OPTIONS... ]
 -bindir <dir>       Directory where the binaries will be installed
                     (default: /usr/local/bin)
 -libdir <dir>       Directory where the OCaml library will be installed
                     (default: /usr/local/lib/omicrob)
 -libexecdir <dir>   Directory where the OCaml library executable files will be installed
                     (default: /usr/local/libexec/omicrob)
 -includedir <dir>   Directory where the OCaml virtual machine will be installed
                     (default: /usr/local/include/omicrob)
 -mandir <dir>       Directory where the manual pages will be installed
                     (default: /usr/local/man)
 -prefix <dir>       Set bindir, libdir, libexecdir includedir and mandir to <dir>/bin, <dir>/lib/omicrob,
                     <dir>/libexec/omicrob, <dir>/include/omicrob and <dir>/man respectively
 -target <opt>       Select one target for which OMicroB will be installed
                     (e.g. -target avr|pic32|microbit)"
}

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 check_directory() {
    if [ ! -d "$1" ]; then
        error "-e" "Error: directory \"$1\" not found.\nPlease install $2."
    fi
}

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

################################################################################

check_command "gcc"
check_command "ocaml"
check_command "ocamlc"
check_command "ocamlopt"
check_command "ocamlbuild"
check_command "ocamldep"
check_command "ocamldoc"
check_command "ocamlclean"
check_command "mkdir"
check_command "rmdir"
check_command "chmod"
check_command "grep"
check_command "echo"
check_command "cat"
check_command "sed"
check_command "cp"
check_command "rm"
check_command "ar"
check_command "cp"

check_directory "$(ocamlc -where)/../obytelib" "the OByteLib library (ex: opam install obytelib)"

################################################################################

GXX="$(which g++)"
AVR_GXX="$(which avr-g++ 2> /dev/null)"
AVR_OBJCOPY="$(which avr-objcopy 2> /dev/null)"
AVRDUDE="$(which avrdude 2> /dev/null)"
XC32_GXX="$(which xc32-g++ 2> /dev/null)"
XC32_BIN2HEX="$(which xc32-bin2hex 2> /dev/null)"
PIC32PROG="$(which pic32prog 2> /dev/null)"
ARM_GXX="$(which arm-none-eabi-gcc 2> /dev/null)"
ARM_OBJCOPY="$(which arm-none-eabi-objcopy 2> /dev/null)"
OCAML="$(which ocaml.opt 2> /dev/null || which ocaml)"
OCAMLOPT="$(which ocamlopt.opt 2> /dev/null || which ocamlopt)"
OCAMLC="$(which ocamlc.opt 2> /dev/null || which ocamlc)"
OCAMLDOC="$(which ocamldoc.opt 2> /dev/null || which ocamldoc)"
OCAMLBUILD="$(which ocamlbuild)"
OCAMLCLEAN="$(which ocamlclean)"
OCAMLWHERE="$(ocamlc -where)"
VERSION="$(cat VERSION)"
ROOT="$(pwd)"

################################################################################

BINDIR=/usr/local/bin
LIBDIR=/usr/local/lib/omicrob
LIBEXECDIR=/usr/local/libexec/omicrob
INCLUDEDIR=/usr/local/include/omicrob
MANDIR=/usr/local/man
TARGETS=()

while [ $# -ne 0 ]; do
    case "$1" in
        -bindir)
            check_absolute_path "$2"
            BINDIR="$(remove_trailing_slash "$2")" ;;
        -libdir)
            check_absolute_path "$2"
            LIBDIR="$(remove_trailing_slash "$2")" ;;
        -libexecdir)
            check_absolute_path "$2"
            LIBEXECDIR="$(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 "$2")"
            BINDIR="$PREFIX/bin"
            LIBDIR="$PREFIX/lib/omicrob"
            LIBEXECDIR="$PREFIX/libexec/omicrob"
            INCLUDEDIR="$PREFIX/include/omicrob"
            MANDIR="$PREFIX/man" ;;
        -target)
            TARGETS+=($2);;
        *)
        usage "Don't know what to do with \"$1\""
    esac
    shift
    shift
done

################################################################################

echo -n "\
VERSION     := $VERSION
OCAMLCLEAN  := $OCAMLCLEAN
BINDIR      := $BINDIR
LIBDIR      := $LIBDIR
LIBEXECDIR  := $LIBEXECDIR
INCLUDEDIR  := $INCLUDEDIR
MAN1DIR     := $MANDIR/man1
MAN3DIR     := $MANDIR/man3
GXX         := $GXX
AVR_GXX     := $AVR_GXX
AVR_OBJCOPY := $AVR_OBJCOPY
AVRDUDE     := $AVRDUDE
XC32_GXX    := $XC32_GXX
XC32_BIN2HEX:= $XC32_BIN2HEX
PIC32PROG   := $PIC32PROG
ARM_GXX     := $ARM_GXX
ARM_OBJCOPY := $ARM_OBJCOPY
OCAMLC      := $OCAMLC -w A-4-58-70 -warn-error A -safe-string -strict-formats -strict-sequence
OCAMLOPT    := $OCAMLOPT -w A-4-58-70 -warn-error A -safe-string -strict-formats -strict-sequence
OCAMLDOC    := $OCAMLDOC
OCAMLBUILD  := $OCAMLBUILD -cflags -w,A-4-58-70,-warn-error,A,-safe-string,-strict-formats,-strict-sequence -lflags -w,A-4-58-70,-warn-error,A,-safe-string,-strict-formats,-strict-sequence -no-links -classic-display -build-dir .build
OCAMLWHERE  := $OCAMLWHERE
SRC         := $ROOT/src
BIN         := $ROOT/bin
LIB         := $ROOT/lib
ETC         := $ROOT/etc

define compile
        @\$(MAKE) --no-print-directory -q -C \$1 && \$(MAKE) --no-print-directory -C \$1 || \$(MAKE) -C \$1
endef

define clean
        @\$(MAKE) --no-print-directory -C \$1 clean > /dev/null
endef

ARCHS :=
ARCHLIBS :=
" > etc/Makefile.conf

################################################################################

echo -n "\
let builddir    = \"$ROOT\"
let libdir      = \"$LIBDIR\"
let libexecdir  = \"$LIBEXECDIR\"
let includedir  = \"$INCLUDEDIR\"
let bindir      = \"$BINDIR\"
let ocaml       = \"$OCAML\"
let ocamlc      = \"$OCAMLC\"
let ocamlclean  = \"$OCAMLCLEAN\"
let cxx         = \"$GXX\"
let avr_cxx     = \"$AVR_GXX\"
let avr_objcopy = \"$AVR_OBJCOPY\"
let avrdude     = \"$AVRDUDE\"
let xc32_cxx    = \"$XC32_GXX\"
let xc32_bin2hex= \"$XC32_BIN2HEX\"
let pic32prog   = \"$PIC32PROG\"
let arm_cxx     = \"$ARM_GXX\"
let arm_objcopy = \"$ARM_OBJCOPY\"
let version     = \"$VERSION\"
" > etc/config.ml

################################################################################

# Refresh targets files
function reset_targets() {
    cp "targets/device_config.ml" "src/omicrob/device_config.ml"
    cp "targets/simul_config.ml" "src/simulators/simul_config.ml"

    cat "src/byterun/prims/indep-prims.h" > "src/byterun/prims/prims.h"
    cat "src/byterun/prims/indep-bindings.c" > "src/byterun/prims/bindings.c"
    cat "src/byterun/simul/indep-sf-regs.h" > "src/byterun/simul/sf-regs.h"
    cat "src/byterun/simul/indep-sf-regs.c" > "src/byterun/simul/sf-regs.c"

    rm -rf "src/byterun/avr/"
    rm -rf "src/byterun/pic32"
    rm -rf "src/byterun/microbit"
}

reset_targets

function target_avr () {
    check_command "avr-g++"
    check_command "avr-objcopy"
    check_command "avrdude"
    check_directory "targets/avr"

    cat "targets/avr/device_config.ml" >> "src/omicrob/device_config.ml"
    cat "targets/avr/simul_config.ml" >> "src/simulators/simul_config.ml"

    mkdir -p "src/byterun/avr"
    cp -f "targets/avr/arch-specific.c" "src/byterun/avr/"
    cp -f "targets/avr/arch-specific.h" "src/byterun/avr/"

    cat "targets/avr/prims/prims.h" >> "src/byterun/prims/prims.h"
    cat "targets/avr/prims/bindings.c" >> "src/byterun/prims/bindings.c"
    cat "targets/avr/prims/prims.h" >> "src/byterun/simul/sf-regs.h"
    cat "targets/avr/simul/sf-regs.c" >> "src/byterun/simul/sf-regs.c"

    for f in "arduboy" "arduino_uno" "arduino_mega_2560"
    do
        mkdir -p "src/byterun/avr/$f/"
        cp -f "targets/avr/$f/avrlib.c" "src/byterun/avr/$f/"
    done

    echo "ARCHS := avr \$(ARCHS)" >> etc/Makefile.conf

    echo "ARCHLIBS := avr/arduino_uno avr/arduino_mega_2560 avr/arduboy \$(ARCHLIBS)" >> etc/Makefile.conf
}

function target_pic32 () {
    check_command "xc32-g++"
    check_command "xc32-bin2hex"
    check_command "pic32prog"
    check_directory "targets/pic32"

    cat "targets/pic32/device_config.ml" >> "src/omicrob/device_config.ml"

    mkdir -p "src/byterun/pic32"
    cp -f "targets/pic32/arch-specific.c" "src/byterun/pic32/"
    cp -f "targets/pic32/arch-specific.h" "src/byterun/pic32/"
    cp -fr "targets/pic32/ld" "src/byterun/pic32/"

    cat "targets/pic32/prims/prims.h" >> "src/byterun/prims/prims.h"
    cat "targets/pic32/prims/bindings.c" >> "src/byterun/prims/bindings.c"
    cat "targets/pic32/prims/prims.h" >> "src/byterun/simul/sf-regs.h"
    cat "targets/pic32/simul/sf-regs.c" >> "src/byterun/simul/sf-regs.c"

    for f in "fubarino_mini" "lchip" "pro_mx7"
    do
        mkdir -p "src/byterun/pic32/$f/"
        cp -f "targets/pic32/$f/pic32lib.c" "src/byterun/pic32/$f/"
    done

    echo "ARCHS := pic32 \$(ARCHS)" >> etc/Makefile.conf
}

function target_microbit () {
    check_command "arm-none-eabi-gcc"

    cat "targets/microbit/device_config.ml" >> "src/omicrob/device_config.ml"

    cat "targets/microbit/byterun/prims/prims.h" >> "src/byterun/prims/prims.h"
    cat "targets/microbit/byterun/prims/bindings.c" >> "src/byterun/prims/bindings.c"
    cat "targets/microbit/byterun/prims/prims.h" >> "src/byterun/simul/sf-regs.h"
    cat "targets/microbit/byterun/simul/sf-regs.c" >> "src/byterun/simul/sf-regs.c"

    cp -rf "targets/microbit/byterun" "src/byterun/microbit"

    echo "ARCHS := microbit \$(ARCHS)" >> "etc/Makefile.conf"
}


################################################################################
## Choose targets

for target in ${TARGETS[@]}
do
    case "$target" in
        avr) target_avr;;
        pic32) target_pic32;;
        microbit) target_microbit;;
    *) echo "Unsupported target \"$target\""
    esac
done

################################################################################

echo "** OMicroB configuration completed successfully **"