#! /bin/sh
#
# Copyright (c) 2014, 2015, 2016 Ingo Schwarze <schwarze@openbsd.org>
# Copyright (c) 2017, 2018 Kristaps Dzonsons <kristaps@bsd.lv>
# Copyright (c) 2022 Omar Polo <op@omarpolo.com>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

OCONFIGURE_VERSION="0.3.8"
MYMENU_VERSION="0.2"

#
# This script outputs two files: config.h and Makefile.configure.
# It tries to read from configure.local, which contains predefined
# values we won't autoconfigure.
#
# If you want to use configure with your project, have your GNUmakefile
# or BSDmakefile---whichever---try to import/include Makefile.configure
# at the beginning of the file.
#
# Like so (note no quotes, no period, etc.):
#
#   include Makefile.configure
#
# If it exists, configure was run; otherwise, it wasn't.
#
# You'll probably want to change parts of this file.  I've noted the
# parts that you'll probably change in the section documentation.
#
# See https://github.com/kristapsdz/oconfigure for more.

set -e

#----------------------------------------------------------------------
# Prepare for running: move aside previous configure runs.
# Output file descriptor usage:
#  1 (stdout): config.h or Makefile.configure
#  2 (stderr): original stderr, usually to the console
#  3: config.log
# You DO NOT want to change this.
#----------------------------------------------------------------------

[ -w config.log ] && mv config.log config.log.old
[ -w config.h   ] && mv config.h config.h.old

exec 3> config.log
echo "config.log: writing..."

# GNU submake prints different output if invoked recursively, which
# messes up CC and CFLAGS detection.  Pass --no-print-directory if
# we have a MAKELEVEL (GNU and FreeBSD make) and the argument is
# allowed.

MAKE_FLAGS=""

if [ -n "${MAKELEVEL}" ]; then
	if [ "${MAKELEVEL}" -gt 0 ] ; then
		MAKE_FLAGS="--no-print-directory"
		echo "all:" | make ${MAKE_FLAGS} -sf - 2>/dev/null || MAKE_FLAGS=""
	fi
fi

if [ -n "$MAKE_FLAGS" ]; then
	echo "GNU submake detected: using --no-print-directory" 1>&2
	echo "GNU submake detected: using --no-print-directory" 1>&3
fi

#----------------------------------------------------------------------
# Initialize all variables here such that nothing can leak in from the
# environment except for CC and CFLAGS, which we might have passed in.
#----------------------------------------------------------------------

CC=`printf "all:\\n\\t@echo \\\$(CC)\\n" | make ${MAKE_FLAGS} -sf -`
CFLAGS=`printf "all:\\n\\t@echo \\\$(CFLAGS)\\n" | make ${MAKE_FLAGS} -sf -`
CFLAGS="${CFLAGS} -g -W -Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes"
CFLAGS="${CFLAGS} -Wno-unused-parameter"
LDADD=
LDADD_LIB_SOCKET=
LDADD_STATIC=
LDADD_LIB_X11=
CPPFLAGS=
LDFLAGS=
DESTDIR=
PREFIX="/usr/local"
BINDIR=
SBINDIR=
INCLUDEDIR=
LIBDIR=
MANDIR=
SHAREDIR=
INSTALL="install"
INSTALL_PROGRAM=
INSTALL_LIB=
INSTALL_MAN=
INSTALL_DATA=

# compats needed
COBJ=

# SunOS sets "cc", but this doesn't exist.
# It does have gcc, so try that instead.
# Prefer clang, though.

command -v ${CC} 2>/dev/null 1>&2 || {
	echo "${CC} not found: trying clang" 1>&2
	echo "${CC} not found: trying clang" 1>&3
	CC=clang
	command -v ${CC} 2>/dev/null 1>&2 || {
		echo "${CC} not found: trying gcc" 1>&2
		echo "${CC} not found: trying gcc" 1>&3
		CC=gcc
		command -v ${CC} 2>/dev/null 1>&2 || {
			echo "gcc not found: giving up" 1>&2
			echo "gcc not found: giving up" 1>&3
			exit 1
		}
	}
}

command -v pkg-config 2>/dev/null 1>&2 && {
	if extra="$(pkg-config --cflags x11 xinerama xft || true)"; then
		echo "Adding to CFLAGS: $extra (pkg-config)"
		CFLAGS="$extra ${CFLAGS}"
	fi
	if extra="$(pkg-config --libs x11 xinerama xft || true)"; then
		echo "Adding to LDFLAGS: $extra (pkg-config)"
		LDFLAGS="$extra ${LDFLAGS}"
	fi
}

#----------------------------------------------------------------------
# Allow certain variables to be overriden on the command line.
#----------------------------------------------------------------------

for keyvals in "$@"
do
	key=`echo $keyvals | cut -s -d '=' -f 1`
	if [ -z "$key" ]
	then
		echo "$0: invalid key-value: $keyvals" 1>&2
		exit 1
	fi
	val=`echo $keyvals | cut -d '=' -f 2-`
	case "$key" in
	LDADD)
		LDADD="$val" ;;
	LDFLAGS)
		LDFLAGS="$val" ;;
	CPPFLAGS)
		CPPFLAGS="$val" ;;
	DESTDIR)
		DESTDIR="$val" ;;
	PREFIX)
		PREFIX="$val" ;;
	MANDIR)
		MANDIR="$val" ;;
	LIBDIR)
		LIBDIR="$val" ;;
	BINDIR)
		BINDIR="$val" ;;
	SHAREDIR)
		SHAREDIR="$val" ;;
	SBINDIR)
		SBINDIR="$val" ;;
	INCLUDEDIR)
		INCLUDEDIR="$val" ;;
	*)
		echo "$0: invalid key: $key" 1>&2
		exit 1
	esac
done


#----------------------------------------------------------------------
# These are the values that will be pushed into config.h after we test
# for whether they're supported or not.
# Each of these must have a runtest(), below.
# Please sort by alpha, for clarity.
# You WANT to change this.
#----------------------------------------------------------------------

HAVE_CAPSICUM=
HAVE_ERR=
HAVE_GETEXECNAME=
HAVE_GETPROGNAME=
HAVE_LANDLOCK=
HAVE_PLEDGE=
HAVE_PROGRAM_INVOCATION_SHORT_NAME=
HAVE_REALLOCARRAY=
HAVE_RECALLOCARRAY=
HAVE_STRTONUM=
HAVE___PROGNAME=

#----------------------------------------------------------------------
# Allow configure.local to override all variables, default settings,
# command-line arguments, and tested features, above.
# You PROBABLY DO NOT want to change this.
#----------------------------------------------------------------------

if [ -r ./configure.local ]; then
	echo "configure.local: reading..." 1>&2
	echo "configure.local: reading..." 1>&3
	cat ./configure.local 1>&3
	. ./configure.local
else
	echo "configure.local: no (fully automatic configuration)" 1>&2
	echo "configure.local: no (fully automatic configuration)" 1>&3
fi

echo 1>&3

#----------------------------------------------------------------------
# Infrastructure for running tests.
# These consists of a series of functions that will attempt to run the
# given test file and record its exit into a HAVE_xxx variable.
# You DO NOT want to change this.
#----------------------------------------------------------------------

COMP="${CC} ${CFLAGS} ${CPPFLAGS} -Wno-unused -Werror"

# Check whether this HAVE_ setting is manually overridden.
# If yes, use the override, if no, do not decide anything yet.
# Arguments: lower-case test name, manual value

ismanual() {
	[ -z "${3}" ] && return 1
	echo "${1}: manual (HAVE_${2}=${3})" 1>&2
	echo "${1}: manual (HAVE_${2}=${3})" 1>&3
	echo 1>&3
	return 0
}

# Run a single autoconfiguration test.
# In case of success, enable the feature.
# In case of failure, do not decide anything yet.
# Arguments: lower-case test name, upper-case test name, additional
# CFLAGS, additional LIBS.

singletest() {
	extralib=""
	cat 1>&3 << __HEREDOC__
${1}: testing...
${COMP} ${3} -o test-${1} test-${1}.c ${LDFLAGS} ${4}
__HEREDOC__
	if ${COMP} ${3} -o "test-${1}" test-${1}.c ${LDFLAGS} ${4} 1>&3 2>&3; then
		echo "${1}: ${CC} succeeded" 1>&3
	else
		if [ -n "${5}" ] ; then
			echo "${1}: ${CC} failed with $? (retrying)" 1>&3
			cat 1>&3 << __HEREDOC__
${1}: testing...
${COMP} ${3} -o test-${1} test-${1}.c ${LDFLAGS} ${5}
__HEREDOC__
			if ${COMP} ${3} -o "test-${1}" test-${1}.c ${LDFLAGS} ${5} 1>&3 2>&3; then
				echo "${1}: ${CC} succeeded" 1>&3
				extralib="(with ${5})"
			else
				echo "${1}: ${CC} failed with $?" 1>&3
				echo 1>&3
				return 1
			fi
		else
			echo "${1}: ${CC} failed with $?" 1>&3
			echo 1>&3
			return 1
		fi
	fi

	if [ -n "${extralib}" ]
	then
		eval "LDADD_${2}=\"${5}\""
	elif [ -n "${4}" ]
	then
		eval "LDADD_${2}=\"${4}\""
	fi

	echo "${1}: yes ${extralib}" 1>&2
	echo "${1}: yes ${extralib}" 1>&3
	echo 1>&3
	eval HAVE_${2}=1
	rm "test-${1}"
	return 0
}

# Run a complete autoconfiguration test, including the check for
# a manual override and disabling the feature on failure.
# Arguments: lower case name, upper case name, additional CFLAGS,
# additional LDADD, alternative LDADD.

runtest() {
	eval _manual=\${HAVE_${2}}
	ismanual "${1}" "${2}" "${_manual}" && return 0
	singletest "${1}" "${2}" "${3}" "${4}" "${5}" && return 0
	echo "${1}: no" 1>&2
	eval HAVE_${2}=0
	return 1
}

#----------------------------------------------------------------------
# Begin running the tests themselves.
# All of your tests must be defined here.
# Please sort as the HAVE_xxxx values were defined.
# You WANT to change this.
# It consists of the following columns:
#    runtest
#    (1) test file
#    (2) macro to set
#    (3) argument to cc *before* -o
#    (4) argument to cc *after*
#    (5) alternative argument to cc *after*
#----------------------------------------------------------------------

runtest capsicum	CAPSICUM			  || true
runtest err		ERR				  || true
runtest getexecname	GETEXECNAME			  || true
runtest getprogname	GETPROGNAME			  || true
runtest landlock	LANDLOCK			  || true
runtest lib_socket	LIB_SOCKET "" "" "-lsocket -lnsl" || true
runtest pledge		PLEDGE				  || true
runtest program_invocation_short_name	PROGRAM_INVOCATION_SHORT_NAME || true
runtest reallocarray	REALLOCARRAY			  || true
runtest recallocarray	RECALLOCARRAY			  || true
runtest static		STATIC "" "-static"		  || true
runtest strtonum	STRTONUM			  || true
runtest x11		LIB_X11 "" "" "-lX11 -lXinerama -lXft" || true
runtest __progname	__PROGNAME			  || true

if [ "${HAVE_LIB_X11}" -eq 0 ]; then
	echo "FATAL: libx11 not found" 1>&2
	echo "make sure to have libx11, libxinerama and libxft installed" 1>&2
	echo "FATAL: libx11 not found" 1>&3
	exit 1
fi

#----------------------------------------------------------------------
# Output writing: generate the config.h file.
# This file contains all of the HAVE_xxxx variables necessary for
# compiling your source.
# You must include "config.h" BEFORE any other variables.
# You WANT to change this.
#----------------------------------------------------------------------

exec > config.h

# Start with prologue.

cat << __HEREDOC__
#ifndef OCONFIGURE_CONFIG_H
#define OCONFIGURE_CONFIG_H

#ifdef __cplusplus
# error "Do not use C++: this is a C application."
#endif
#if !defined(__GNUC__) || (__GNUC__ < 4)
# define __attribute__(x)
#endif
#if defined(__linux__) || defined(__MINT__)
# define _GNU_SOURCE /* memmem, memrchr, setresuid... */
# define _DEFAULT_SOURCE /* le32toh, crypt, ... */
#endif
#if defined(__NetBSD__)
# define _OPENBSD_SOURCE /* reallocarray, etc. */
#endif
#if defined(__sun)
# ifndef _XOPEN_SOURCE /* SunOS already defines */
#  define _XOPEN_SOURCE /* XPGx */
# endif
# define _XOPEN_SOURCE_EXTENDED 1 /* XPG4v2 */
# ifndef __EXTENSIONS__ /* SunOS already defines */
#  define __EXTENSIONS__ /* reallocarray, etc. */
# endif
#endif
#if !defined(__BEGIN_DECLS)
# define __BEGIN_DECLS
#endif
#if !defined(__END_DECLS)
# define __END_DECLS
#endif

__HEREDOC__

# This is just for size_t, mode_t, and dev_t.
# Most of these functions, in the real world, pull in <string.h> or
# someting that pulls in support for size_t.
# Our function declarations are standalone, so specify them here.

if [ ${HAVE_REALLOCARRAY} -eq 0 -o \
     ${HAVE_RECALLOCARRAY} -eq 0 ]
then
	echo "#include <sys/types.h> /* size_t, mode_t, dev_t */ "
	echo
fi

if [ ${HAVE_ERR} -eq 0 ]
then
	echo "#include <stdarg.h> /* err(3) */"
	echo
fi

# Now we handle our HAVE_xxxx values.
# Most will just be defined as 0 or 1.

cat << __HEREDOC__
/*
 * Results of configuration feature-testing.
 */
#define HAVE_CAPSICUM ${HAVE_CAPSICUM}
#define HAVE_ERR ${HAVE_ERR}
#define HAVE_GETEXECNAME ${HAVE_GETEXECNAME}
#define HAVE_GETPROGNAME ${HAVE_GETPROGNAME}
#define HAVE_LANDLOCK ${HAVE_LANDLOCK}
#define HAVE_PLEDGE ${HAVE_PLEDGE}
#define HAVE_PROGRAM_INVOCATION_SHORT_NAME ${HAVE_PROGRAM_INVOCATION_SHORT_NAME}
#define HAVE_REALLOCARRAY ${HAVE_REALLOCARRAY}
#define HAVE_RECALLOCARRAY ${HAVE_RECALLOCARRAY}
#define HAVE_STRTONUM ${HAVE_STRTONUM}
#define HAVE___PROGNAME ${HAVE___PROGNAME}

__HEREDOC__

# Now we do our function declarations for missing functions.

[ ${HAVE_ERR} -eq 0 ] && \
	COBJ="compat_err.c ${COBJ}" && \
	cat << __HEREDOC__
/*
 * Compatibility functions for err(3).
 */
extern void err(int, const char *, ...) __attribute__((noreturn));
extern void errc(int, int, const char *, ...) __attribute__((noreturn));
extern void errx(int, const char *, ...) __attribute__((noreturn));
extern void verr(int, const char *, va_list) __attribute__((noreturn));
extern void verrc(int, int, const char *, va_list) __attribute__((noreturn));
extern void verrx(int, const char *, va_list) __attribute__((noreturn));
extern void warn(const char *, ...);
extern void warnx(const char *, ...);
extern void warnc(int, const char *, ...);
extern void vwarn(const char *, va_list);
extern void vwarnc(int, const char *, va_list);
extern void vwarnx(const char *, va_list);
__HEREDOC__

[ ${HAVE_GETPROGNAME} -eq 0 ] && \
	COBJ="compat_getprogname.c ${COBJ}" && \
	cat << __HEREDOC__
/*
 * Compatibility for getprogname(3).
 */
extern const char *getprogname(void);

__HEREDOC__

[ ${HAVE_REALLOCARRAY} -eq 0 ] && \
	COBJ="compat_reallocarray.c ${COBJ}" && \
	cat << __HEREDOC__
/*
 * Compatibility for reallocarray(3).
 */
extern void *reallocarray(void *, size_t, size_t);

__HEREDOC__

[ ${HAVE_RECALLOCARRAY} -eq 0 ] && \
	COBJ="compat_recallocarray.c ${COBJ}" && \
	cat << __HEREDOC__
/*
 * Compatibility for recallocarray(3).
 */
extern void *recallocarray(void *, size_t, size_t, size_t);

__HEREDOC__

[ ${HAVE_STRTONUM} -eq 0 ] && \
	COBJ="compat_strtonum.c ${COBJ}" && \
	cat << __HEREDOC__
/*
 * Compatibility for strotnum(3).
 */
extern long long strtonum(const char *, long long, long long, const char **);

__HEREDOC__

cat <<__HEREDOC__
/*
 * mymenu version
 */
#define VERSION "${MYMENU_VERSION}"

__HEREDOC__

cat << __HEREDOC__
#endif /*!OCONFIGURE_CONFIG_H*/
__HEREDOC__

echo "config.h: written" 1>&2
echo "config.h: written" 1>&3

#----------------------------------------------------------------------
# Now we go to generate our Makefile.configure.
# This file is simply a bunch of Makefile variables.
# They'll work in both GNUmakefile and BSDmakefile.
# You MIGHT want to change this.
#----------------------------------------------------------------------

exec > Makefile.configure

[ -z "${BINDIR}"     ] && BINDIR="${PREFIX}/bin"
[ -z "${SBINDIR}"    ] && SBINDIR="${PREFIX}/sbin"
[ -z "${INCLUDEDIR}" ] && INCLUDEDIR="${PREFIX}/include"
[ -z "${LIBDIR}"     ] && LIBDIR="${PREFIX}/lib"
[ -z "${MANDIR}"     ] && MANDIR="${PREFIX}/man"
[ -z "${SHAREDIR}"   ] && SHAREDIR="${PREFIX}/share"

[ -z "${INSTALL_PROGRAM}" ] && INSTALL_PROGRAM="${INSTALL} -m 0555"
[ -z "${INSTALL_LIB}"     ] && INSTALL_LIB="${INSTALL} -m 0444"
[ -z "${INSTALL_MAN}"     ] && INSTALL_MAN="${INSTALL} -m 0444"
[ -z "${INSTALL_DATA}"    ] && INSTALL_DATA="${INSTALL} -m 0444"

cat << __HEREDOC__
CC		 = ${CC}
CFLAGS		 = ${CFLAGS}
CPPFLAGS	 = ${CPPFLAGS}
LDADD		 = ${LDADD}
LDADD_LIB_SOCKET = ${LDADD_LIB_SOCKET}
LDADD_STATIC	 = ${LDADD_STATIC}
LDADD_LIB_X11	 = ${LDADD_LIB_X11}
LDFLAGS		 = ${LDFLAGS}
STATIC		 = ${STATIC}
PREFIX		 = ${PREFIX}
BINDIR		 = ${BINDIR}
SHAREDIR	 = ${SHAREDIR}
SBINDIR		 = ${SBINDIR}
INCLUDEDIR	 = ${INCLUDEDIR}
LIBDIR		 = ${LIBDIR}
MANDIR		 = ${MANDIR}
INSTALL		 = ${INSTALL}
INSTALL_PROGRAM	 = ${INSTALL_PROGRAM}
INSTALL_LIB	 = ${INSTALL_LIB}
INSTALL_MAN	 = ${INSTALL_MAN}
INSTALL_DATA	 = ${INSTALL_DATA}

COBJ		 = ${COBJ}
__HEREDOC__

echo "Makefile.configure: written" 1>&2
echo "Makefile.configure: written" 1>&3

exit 0