#!/bin/bash

# configure script adapter for Meson

# Based on build-api: https://github.com/cgwalters/build-api

# Copyright 2010, 2011, 2013 Colin Walters <walters@verbum.org>

# Copyright 2016, 2017 Emmanuele Bassi

# Licensed under the new-BSD license (http://www.opensource.org/licenses/bsd-license.php)

# Build API variables:

# Little helper function for reading args from the commandline.

# it automatically handles -a b and -a=b variants, and returns 1 if

# we need to shift $3.

read_arg() {

    # $1 = arg name

    # $2 = arg value

    # $3 = arg parameter

    local rematch='^[^=]*=(.*)$'

    if [[ $2 =~ $rematch ]]; then

	read "$1" <<< "${BASH_REMATCH[1]}"

    else

	read "$1" <<< "$3"

	# There is no way to shift our callers args, so

	# return 1 to indicate they should do it instead.

	return 1

    fi

}

sanitycheck() {

    # $1 = arg name

    # $1 = arg command

    # $2 = arg alternates

    local cmd=$( which $2 2>/dev/null )

    if [ -x "$cmd" ]; then

        read "$1" <<< "$cmd"

        return 0

    fi

    test -z $3 || {

        for alt in $3; do

            cmd=$( which $alt 2>/dev/null )

            if [ -x "$cmd" ]; then

                read "$1" <<< "$cmd"

                return 0

            fi

        done

    }

    echo -e "\e[1;31mERROR\e[0m: Command '$2' not found"

    exit 1

}

sanitycheck MESON 'meson'

sanitycheck MESONTEST 'mesontest'

sanitycheck NINJA 'ninja' 'ninja-build'

enable_docs='-Ddocs=false'

enable_introspection='-Dintrospection=true'

while (($# > 0)); do

    case "${1%%=*}" in

	--prefix) read_arg prefix "$@" || shift;;

	--bindir) read_arg bindir "$@" || shift;;

	--sbindir) read_arg sbindir "$@" || shift;;

	--libexecdir) read_arg libexecdir "$@" || shift;;

	--datarootdir) read_arg datarootdir "$@" || shift;;

	--datadir) read_arg datadir "$@" || shift;;

	--sysconfdir) read_arg sysconfdir "$@" || shift;;

	--libdir) read_arg libdir "$@" || shift;;

	--mandir) read_arg mandir "$@" || shift;;

	--includedir) read_arg includedir "$@" || shift;;

	--enable-gtk-doc) enable_docs='-Ddocs=true';;

	--disable-gtk-doc) enable_docs='-Ddocs=false';;

	--enable-introspection) enable_introspection='-Dintrospection=true';;

	--disable-introspection) enable_introspection='-Dintrospection=false';;

	*) echo -e "\e[1;33mINFO\e[0m: Ignoring unknown option '$1'";;

    esac

    shift

done

# Defaults

test -z ${prefix} && prefix="/usr/local"

test -z ${bindir} && bindir=${prefix}/bin

test -z ${sbindir} && sbindir=${prefix}/sbin

test -z ${libexecdir} && libexecdir=${prefix}/bin

test -z ${datarootdir} && datarootdir=${prefix}/share

test -z ${datadir} && datadir=${datarootdir}

test -z ${sysconfdir} && sysconfdir=${prefix}/etc

test -z ${libdir} && libdir=${prefix}/lib

test -z ${mandir} && mandir=${prefix}/share/man

test -z ${includedir} && includedir=${prefix}/include

# The source directory is the location of this file

srcdir=$(dirname $0)

# The build directory is the current location

builddir=`pwd`

# If we're calling this file from the source directory then

# we automatically create a build directory and ensure that

# both Meson and Ninja invocations are relative to that

# location

if [[ -f "${builddir}/meson.build" ]]; then

  mkdir -p _build

  builddir="${builddir}/_build"

  NINJA_OPT="-C ${builddir}"

fi

# Wrapper Makefile for Ninja

cat > Makefile <

# Generated by configure; do not edit

all:

	CC="\$(CC)" CXX="\$(CXX)" ${NINJA} ${NINJA_OPT}

install:

	DESTDIR="\$(DESTDIR)" ${NINJA} ${NINJA_OPT} install

check:

	${MESONTEST} ${NINJA_OPT}

END

echo "Summary:"

echo "  meson:....... ${MESON}"

echo "  ninja:....... ${NINJA}"

echo "  prefix:...... ${prefix}"

echo "  bindir:...... ${bindir}"

echo "  sbindir:..... ${sbindir}"

echo "  libexecdir:.. ${libexecdir}"

echo "  datarootdir:. ${datarootdir}"

echo "  datadir:..... ${datadir}"

echo "  sysconfdir:.. ${sysconfdir}"

echo "  libdir:...... ${libdir}"

echo "  mandir:...... ${mandir}"

echo "  includedir:.. ${includedir}"

echo "  additional:.."

echo "    - docs: ${enable_docs}"

echo "    - introspection: ${enable_introspection}"

exec ${MESON} \

	--prefix=${prefix} \

	--libdir=${libdir} \

	--libexecdir=${libexecdir} \

	--datadir=${datadir} \

	--sysconfdir=${sysconfdir} \

	--bindir=${bindir} \

	--includedir=${includedir} \

	--mandir=${mandir} \

	--default-library shared \

	${enable_docs} \

	${enable_introspection} \

	${builddir} \

	${srcdir}

# vim: ai ts=8 noet sts=2 ft=sh