# Copyright (C) Alexander Borisov
# Copyright (C) NGINX, Inc.


shift

for nxt_option; do

    case "$nxt_option" in
        -*=*) value=`echo "$nxt_option" | sed -e 's/[-_a-zA-Z0-9]*=//'`     ;;
           *) value="" ;;
    esac

    case "$nxt_option" in
        --perl=*)      NXT_PERL="$value"                                ;;
        --include=*)   NXT_PERL_INCPATH="$value"                        ;;
        --module=*)    NXT_PERL_MODULE="$value"                         ;;

        --help)
            cat << END

    --perl=FILE           set perl executable, default: perl
    --include=DIRECTORY   set directory path to perl headers
    --module=NAME         set unit perl module name

END
            exit 0
        ;;

        *)
            echo
            echo $0: error: invalid Perl option \"$nxt_option\"
            echo
            exit 1
        ;;
    esac

done


if [ ! -f $NXT_AUTOCONF_DATA ]; then
   echo
   echo Please run common $0 before configuring module \"$nxt_module\".
   echo
   exit 1
fi

. $NXT_AUTOCONF_DATA

$echo "configuring Perl module"
$echo "configuring Perl module ..." >> $NXT_AUTOCONF_ERR

NXT_PERL=${NXT_PERL=perl}
NXT_PERL_MODULE=${NXT_PERL_MODULE=${NXT_PERL##*/}}

nxt_found=no

if /bin/sh -c "$NXT_PERL -MConfig -e 'print \"Perl version: \",
    \$Config{version}, \"\\n\"'" >> $NXT_AUTOCONF_ERR 2>&1; then

    NXT_PERL_INCPATH=${NXT_PERL_INCPATH=`$NXT_PERL -MConfig -e 'print $Config{archlib}, "/CORE"'`}
    NXT_PERL_INCLUDE="-I ${NXT_PERL_INCPATH}"

    NXT_PERL_LDOPTS=`$NXT_PERL -MExtUtils::Embed -e ldopts`

    if [ "$NXT_SYSTEM" = "Darwin" ]; then
        # OS X system perl wants to link universal binaries
        NXT_PERL_LDOPTS=`echo $NXT_PERL_LDOPTS \
                         | sed -e 's/-arch i386//' -e 's/-arch x86_64//'`

        # macosx-version-min is already defined for Darwin
        NXT_PERL_LDOPTS=`echo $NXT_PERL_LDOPTS \
                         | $NXT_PERL -pe 's/-mmacosx-version-min=\d+\.\d+//'`
    fi

    NXT_PERL_LIBS="-L ${NXT_PERL_INCPATH} ${NXT_PERL_LDOPTS}"

    nxt_feature="Perl"
    nxt_feature_name=""
    nxt_feature_run=no
    nxt_feature_incs="${NXT_PERL_INCLUDE}"
    nxt_feature_libs="${NXT_PERL_LIBS}"
    nxt_feature_test="
        #include <EXTERN.h>
        #include <perl.h>

        static PerlInterpreter *my_perl;

        int main() {
            char argv[] = \"\\0-e\\00\";
            char *embedding[] = { &argv[0], &argv[1], &argv[4] };

            int pargc = 0;
            char **pargv = NULL, **penv = NULL;
            PERL_SYS_INIT3(&pargc, &pargv, &penv);

            my_perl = perl_alloc();
            perl_construct(my_perl);
            perl_parse(my_perl, NULL, 3, embedding, NULL);
            PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
            perl_run(my_perl);

            perl_destruct(my_perl);
            perl_free(my_perl);
            PERL_SYS_TERM();

            return 0;
        }"

    . auto/feature

else
    $echo "checking for Perl ... not found"
fi

if [ $nxt_found = no ]; then
    $echo
    $echo $0: error: no Perl found.
    $echo
    exit 1;
fi


nxt_feature="Perl version"
nxt_feature_name=""
nxt_feature_run=value
nxt_feature_incs="${NXT_PERL_INCLUDE}"
nxt_feature_libs="${NXT_PERL_LIBS}"
nxt_feature_test="
    #include <EXTERN.h>
    #include <perl.h>

    int main() {
        printf(\"%s\", PERL_VERSION_STRING);
        return 0;
    }"

. auto/feature


if grep ^$NXT_PERL_MODULE: $NXT_MAKEFILE 2>&1 > /dev/null; then
    $echo
    $echo $0: error: duplicate \"$NXT_PERL_MODULE\" module configured.
    $echo
    exit 1;
fi

$echo " + Perl module: ${NXT_PERL_MODULE}.unit.so"

. auto/cc/deps

$echo >> $NXT_MAKEFILE

NXT_PERL_MODULE_SRCS=" \
    src/perl/nxt_perl_psgi.c \
    src/perl/nxt_perl_psgi_layer.c
"

# The Perl module object files.

nxt_objs=

for nxt_src in $NXT_PERL_MODULE_SRCS; do

    nxt_obj=${nxt_src%.c}-$NXT_PERL_MODULE.o
    nxt_dep=${nxt_src%.c}-$NXT_PERL_MODULE.dep
    nxt_dep_flags=`nxt_gen_dep_flags`
    nxt_dep_post=`nxt_gen_dep_post`
    nxt_objs="$nxt_objs $NXT_BUILD_DIR/$nxt_obj"

    cat << END >> $NXT_MAKEFILE

$NXT_BUILD_DIR/$nxt_obj:	$nxt_src
	mkdir -p $NXT_BUILD_DIR/src/perl
	\$(CC) -c \$(CFLAGS) \$(NXT_INCS) $NXT_PERL_INCLUDE \\
	$nxt_dep_flags \\
	-o $NXT_BUILD_DIR/$nxt_obj $nxt_src
	$nxt_dep_post

-include $NXT_BUILD_DIR/$nxt_dep

END

done

cat << END >> $NXT_MAKEFILE

.PHONY: ${NXT_PERL_MODULE}
.PHONY: ${NXT_PERL_MODULE}-install
.PHONY: ${NXT_PERL_MODULE}-uninstall

all: ${NXT_PERL_MODULE}

${NXT_PERL_MODULE}:	$NXT_BUILD_DIR/${NXT_PERL_MODULE}.unit.so

$NXT_BUILD_DIR/${NXT_PERL_MODULE}.unit.so:	$nxt_objs
	\$(NXT_MODULE_LINK) -o $NXT_BUILD_DIR/${NXT_PERL_MODULE}.unit.so \\
	$nxt_objs $NXT_PERL_LIBS $NXT_LD_OPT


install: ${NXT_PERL_MODULE}-install

${NXT_PERL_MODULE}-install: ${NXT_PERL_MODULE} install-check
	install -d \$(DESTDIR)$NXT_MODULES
	install -p $NXT_BUILD_DIR/${NXT_PERL_MODULE}.unit.so \\
		\$(DESTDIR)$NXT_MODULES/


uninstall: ${NXT_PERL_MODULE}-uninstall

${NXT_PERL_MODULE}-uninstall:
	rm -f \$(DESTDIR)$NXT_MODULES/${NXT_PERL_MODULE}.unit.so
	@rmdir -p \$(DESTDIR)$NXT_MODULES 2>/dev/null || true

END