#! /bin/sh
#---------------------------------------------------------------------------#
# vim: ts=4 sw=4 et ft=sh
#---------------------------------------------------------------------------#
# @configure_input@
#---------------------------------------------------------------------------#
# Copyright (C) 1995-1999,2001-2005 The University of Melbourne.
# Copyright (C) 2013, 2016, 2019-2020, 2025 The Mercury team.
# This file may only be copied under the terms of the GNU General
# Public License - see the file COPYING in the Mercury distribution.
#---------------------------------------------------------------------------#
#
# mmake - Mercury Make.
#
#   Type mmake -h for help.
#
#-----------------------------------------------------------------------------#

# IMPORTANT: the manpage is produced automatically from this help message,
# so if you change the help message, don't forget to check that
# the manpage still looks OK.
Help="\
Name: mmake -- Mercury Make
Usage: mmake [<mmake options>] [-- <make options>] <target>...
Options:
    --use-mmc-make:
        Use \`mmc --make' to build Mercury targets.
        Implies \`--use-subdirs'.
    --use-subdirs:
        Build intermediate files in a \`Mercury' subdirectory,
        rather than in the current directory.
        (If the current directory already contains a \`Mercury'
        subdirectory, then this option is the default.)
    --target c:
        Compile to C. This is the default."
Help="${Help}
    --mercury-standard-library-directory <directory>
    --mercury-stdlib-dir <directory>:
        The directory containing the installed Mercury standard library.
    --no-mercury-standard-library-directory, --no-mercury-stdlib-dir:
        Don't use an installed Mercury standard library.
    -s, --save-makefile:
        Save the generated makefile to \`Mmake.makefile'.
        This is useful for tracking down syntax errors in your Mmakefile.
    -f <filename>, --file <filename>:
        Use the specified file as the Mmake file.
    -v, --verbose:
        Print verbose progress messages.
    -w-, --no-warn-undefined-vars:
        Normally Mmake will warn about variables which are used
        but not defined. This option disables that warning.
        (The warning is never enabled when doing \`mmake clean'
        or \`mmake depend' or the like, to avoid spurious warnings
        when the dependencies have not yet been made.)
    -h, --help:
        Print this usage message.
Targets:
    <module>.depend:
        Make the files \`<module>.dep' and \`<module>.dv'.
        This step is required in preparation for the targets below.
    <module>:
        Compile and link a Mercury program with main module
        \`<module>.m' to produce an executable.
    clean:
        Remove intermediate files.
    realclean:
        Remove all automatically-generated files: intermediate files,
        dependency files, and executables.
"

MERCURY_CONFIG_DIR=${MERCURY_CONFIG_DIR-${MERCURY_STDLIB_DIR-@CONFIG_LIBDIR@}}
MERCURY_STDLIB_DIR=${MERCURY_STDLIB_DIR-@LIBDIR@}
MMAKE_MAKE=${MMAKE_MAKE=@GNU_MAKE@}
MERCURY_DEFAULT_GRADE=${MERCURY_DEFAULT_GRADE=@DEFAULT_GRADE@}
MKTEMP=@MKTEMP@
TMPDIR=${TMPDIR=/tmp}

# Set the MACOSX_DEPLOYMENT_TARGET environment variable if needed.
@SET_MACOSX_DEPLOYMENT_TARGET@

MMAKE="$0"
include_makefile=
verbose=false
save_makefile=false
if test -d Mercury
then
    use_subdirs=${MMAKE_USE_SUBDIRS=yes}
else
    use_subdirs=${MMAKE_USE_SUBDIRS=no}
fi
use_mmc_make=${MMAKE_USE_MMC_MAKE=no}
warn_undefined_vars=true

while test "$#" -gt 0
do
    case "$1" in
        -h|--help)
            echo "${Help}"
            exit 0
            ;;
        --use-subdirs)
            use_subdirs=yes
            shift
            ;;
        --no-use-subdirs)
            use_subdirs=no
            shift
            ;;
        --use-mmc-make)
            use_mmc_make=yes
            shift
            ;;
        --no-mmc-make)
            use_mmc_make=no
            shift
            ;;
        --target)
            case "$2" in
                c)
                    ;;
                *)  echo "$0: invalid argument to" "\`--target' option" 1>&2
                    exit 1
                    ;;
            esac
            shift; shift
            ;;
        -s|--save-makefile)
            save_makefile=true
            MMAKE="${MMAKE} $1"
            shift
            ;;
        -s-|--no-save-makefile)
            save_makefile=false
            MMAKE="${MMAKE} $1"
            shift
            ;;
        -f|--file)
            mmake="$2"
            shift
            shift
            ;;
        -v|--verbose)
            verbose=true
            MMAKE="${MMAKE} $1"
            shift
            ;;
        -v-|--no-verbose)
            verbose=false
            MMAKE="${MMAKE} $1"
            shift
            ;;
        -w|--warn-undefined-vars)
            warn_undefined_vars=true
            shift
            ;;
        -w-|--no-warn-undefined-vars)
            warn_undefined_vars=false
            shift
            ;;
        --include-makefile)
            # XXX check that $2 exists first
            MMAKE="${MMAKE} $1 $2"
            include_makefile="${include_makefile} $2"
            shift
            shift
            ;;

        --mercury-standard-library-directory|--mercury-stdlib-dir)
            MERCURY_STDLIB_DIR="$2"
            MERCURY_CONFIG_DIR="$2"
            shift
            ;;
        --no-mercury-standard-library-directory|--no-mercury-stdlib-dir)
            unset MERCURY_STDLIB_DIR
            unset MERCURY_CONFIG_DIR
            ;;

        --mercury-config-directory-directory|--mercury-config-dir)
            MERCURY_CONFIG_DIR="$2"
            shift
            ;;
        # We don't allow `MERCURY_CONFIG_DIR' to be unset
        # without `MERCURY_STDLIB_DIR' also being unset.

        --)
            MMAKE="${MMAKE} $1"
            shift
            break
            ;;
        *)
            break
            ;;
    esac
done

# With `mmc --make' we need to use subdirs to avoid make trying to
# use Mmake rules to build the `.o' files for Mercury modules.
case "${use_mmc_make}" in
    yes)
        use_subdirs=yes
        ;;
esac

if test "${MERCURY_CONFIG_DIR}" != ""
then
    MMAKE_DIR=${MMAKE_DIR=${MERCURY_CONFIG_DIR}/mmake}
    export MERCURY_CONFIG_DIR
    export MERCURY_STDLIB_DIR
fi

case "${MMAKE_DIR}" in
    "")
        echo "mmake: MMAKE_DIR not set"
        exit 1
        ;;
    *)
        MMAKE_VARS=${MMAKE_VARS=${MMAKE_DIR}/Mmake.vars}
        MMAKE_RULES=${MMAKE_RULES=${MMAKE_DIR}/Mmake.rules}
        ;;
esac

if test "${mmake}" = ""
then
    if test "${MMAKEFILE}" = ""
    then
        if test -f Mmakefile
        then
            MMAKEFILE="Mmakefile"
        else
            if test -f Mmake
            then
                MMAKEFILE="Mmake"
            else
                MMAKEFILE=""
            fi
        fi
    fi
else
    MMAKEFILE="${mmake}"
fi

case "${use_subdirs}" in
    no)
        dvs="`echo *.dv`"
        if test "${dvs}" = "*.dv"
        then
            dvs=""
        fi
        deps="`echo *.dep`"
        if test "${deps}" = "*.dep"
        then
            deps=""
        fi
        ds="`echo *.d`"
        if test "${ds}" = "*.d"
        then
            ds=""
        fi
        ;;
    yes)
        dvs="`echo Mercury/deps/*.dv`"
        if test "${dvs}" = "Mercury/deps/*.dv"
        then
            dvs=""
        fi
        deps="`echo Mercury/deps/*.dep`"
        if test "${deps}" = "Mercury/deps/*.dep"
        then
            deps=""
        fi
        ds="`echo Mercury/ds/*.d`"
        if test "${ds}" = "Mercury/ds/*.d"
        then
            ds=""
        fi
        ;;
esac

MMAKE_USE_SUBDIRS=${use_subdirs}
MMAKE_USE_MMC_MAKE=${use_mmc_make}

if "${save_makefile}"
then
    tmp=Mmake.makefile
else
    case "${MKTEMP}" in
        "")
            old_umask=`umask`
            umask 022
            try=0
            until
                mmake_tmpdir=${TMPDIR}/mmake$$-${try}
                tmp=${mmake_tmpdir}/mmake
                trap 'rmdir ${mmake_tmpdir} >/dev/null 2>&1; exit 1' \
                    1 2 3 13 15
                mkdir ${mmake_tmpdir}
            do
                try=`expr ${try} + 1`
                # Give up after 20 tries.
                case ${try} in
                    20)
                        echo "mmake: unable to create directory" \
                            "for temporary makefile" 1>&2
                        exit 1
                        ;;
                esac
            done
            trap 'status=$?; rm -rf ${mmake_tmpdir}; exit ${status}' \
                0 1 2 3 13 15
            umask ${old_umask}
            ;;
        *)
            # mktemp should give its own error message.
            tmp=`${MKTEMP} ${TMPDIR}/mmake.XXXXXX` || exit 1
            trap 'status=$?; rm -f ${tmp}; exit ${status}' 0 1 2 3 13 15
            ;;
    esac
fi

MMAKE_MAKE_CMD="${MMAKE_MAKE} -f ${tmp} -r"

# Enable checking for undefined variables -- but not when making the
# dependencies, or when cleaning up, because in either of those two cases
# the dependencies might not have been made yet, so there may be
# lots of undefined variables.
case "$@" in
    dep*|*' dep'*|*.dep*|*clean*)
        MMAKE_MAKE_OPTS=""
        ;;
    *)
        case "${warn_undefined_vars}" in
            true)
                MMAKE_MAKE_OPTS="--warn-undefined-variables"
                ;;
            false)
                MMAKE_MAKE_OPTS=""
                ;;
        esac
        ;;
esac

if "${verbose}"
then
    echo MMAKE=${MMAKE}
    echo export MMAKE
    echo MMAKE_MAKE_CMD=${MMAKE_MAKE_CMD}
    echo export MMAKE_MAKE_CMD
    echo MMAKE_USE_SUBDIRS=${MMAKE_USE_SUBDIRS}
    echo export MMAKE_USE_SUBDIRS
    echo MMAKE_USE_MMC_MAKE=${MMAKE_USE_MMC_MAKE}
    echo export MMAKE_USE_MMC_MAKE
    echo MERCURY_DEFAULT_GRADE=${MERCURY_DEFAULT_GRADE}
    echo export MERCURY_DEFAULT_GRADE
    echo MMAKEFILE=${MMAKEFILE}
    echo export MMAKEFILE
    echo cat ${MMAKE_VARS} ${include_makefile} ${MMAKEFILE} \
        ${ds} ${dvs} ${deps} ${MMAKE_RULES}">>" ${tmp}
    echo ${MMAKE_MAKE} ${MMAKE_MAKE_OPTS} -f ${tmp} -r "$@"
fi
export MMAKE
export MMAKE_MAKE_CMD
export MMAKE_USE_SUBDIRS
export MMAKE_USE_MMC_MAKE
export MERCURY_DEFAULT_GRADE
export MMAKEFILE
# XXX The ${dvs} and ${ds} variables can be so long as to overflow size limits
# on command lines, so we use xargs. Echo doesn't quote the file names
# correctly, but this is not a problem in practice because none of our
# file names contain any special characters.
# If this is fixed, then that fix needs to be replicated in one of the modules
# that has been carved out of modules.m over the years.
# XXX There should only be one .dv file per program, just like there should be
# just one .dep file per program, so the value of ${dvs} should NOT overflow
# any limits. However, since there should be one .d file per MODULE,
# ${ds} definitely CAN overflow command line length limits.
{
cat ${MMAKE_VARS}
echo ${dvs} | xargs cat
echo ${include_makefile} ${MMAKEFILE} | xargs cat
echo 'ifneq ($(MMAKE_AUTO_INCLUDE_DS),no)'
echo ${ds} | xargs cat
echo 'endif'
cat ${deps} ${MMAKE_RULES}
} > ${tmp}

if test "${MMAKE_DEBUG}" != ""
then
    MMAKE_DEBUG_OPTS="--debug=${MMAKE_DEBUG}"
else
    MMAKE_DEBUG_OPTS=""
fi

case "$#" in
    # Note that we can't use `exec' here, because if we did that,
    # that `trap' code which removes ${tmp} would never get executed.
    0)
        ${MMAKE_MAKE} ${MMAKE_MAKE_OPTS} ${MMAKE_DEBUG_OPTS} -f ${tmp} -r
        ;;
    *)
        ${MMAKE_MAKE} ${MMAKE_MAKE_OPTS} ${MMAKE_DEBUG_OPTS} -f ${tmp} -r "$@"
        ;;
esac