utils-extra

configure (3521B)

#!/bin/sh
# SPDX-FileCopyrightText: 2017-2023 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
# SPDX-License-Identifier: MPL-2.0
target_filter=""
usage() {
cat <<END
Usage: [variables] configure [variables]
Variables:
  PREFIX=DIR
  BINDIR=DIR
  MANDIR=DIR
  MSGFMT=BIN
  CC=BIN
  MAKE=BIN
  MANDOC=BIN
  SHELLCHECK=BIN
  FLAWFINDER=BIN
  GCOV=BIN
  CFLAGS=OPTIONS
  EXTRA_CFLAGS=OPTIONS
  LDFLAGS=OPTIONS
  LDSTATIC=OPTIONS
Variables are set in the following order: Default, Environment, Arguments
Dependencies: See the README.md file
END
}
is_ok() {
	status="$?"
	if test $status -eq 0; then
		printf " OK\n"
	else
		printf " FAIL\n"
	fi
	return $status
}
or_die() {
	is_ok || exit 1
}
maybe_filter() {
	if test "$#" -gt 0
	then
		exec grep -v -F "$@"
	else
		cat
	fi
}
gen_targets() {
	printf 'EXE = '
	printf '%s\n ' cmd/*.c | maybe_filter ${target_filter} | sed -e 's;.c$;;' | tr -d '\n'
	echo
	printf 'MAN1 = '
	printf '%s\n ' cmd/*.1 sh-man/*.1 | maybe_filter ${target_filter} | tr -d '\n'
	echo
}
check_cmd() {
	var="$1"
	full_cmd="$2"
	# shellcheck disable=SC2086
	set -- $full_cmd
	cmd="$1"
	printf 'Checking $%s = %s command existence ...' "$var" "$full_cmd"
	command -v "$cmd" >/dev/null ; is_ok
}
check_header() {
	header="$1"
	set -- $CC -E -x c -
	printf 'Checking <%s> header (printf "#include <%s>" | %s) ...' "$header" "$header" "$*"
	printf '#include <%s>\n' "$header" | $@ >/dev/null
	is_ok
}
## User configuration
# defaults
PREFIX="${PREFIX:-/usr/local}"
MSGFMT="${MSGFMT:-msgfmt}"
CC="${CC:-cc}"
MAKE="${MAKE:-make}"
GCOV="${GCOV:-gcov}"
# -DDEBUG: Otherwise assert() does nothing, fine to be removed in production
CFLAGS="${CFLAGS:--g -O2 -DDEBUG}"
MANDOC="${MANDOC:-mandoc}"
SHELLCHECK="${SHELLCHECK:-shellcheck}"
FLAWFINDER="${FLAWFINDER:-flawfinder}"
# Also allow variables through arguments
for i; do
	case "$i" in
	-h|--help)
		usage
		exit 1
	;;
	-*)
		printf "Unknown argument ‘%s’\n" "${i}"
		usage
		exit 1
	;;
	*=*)
		# shellcheck disable=SC2163
		export "$i"
		shift
	;;
	*)
		printf "Unknown argument ‘%s’\n" "${i}"
		usage
		exit 1
	;;
	esac
done
# Fallback definitions for dirs, based on $PREFIX
BINDIR="${BINDIR:-${PREFIX}/bin}"
MANDIR="${MANDIR:-${PREFIX}/share/man}"
# Add some extra CFLAGS
CFLAGS="${CFLAGS} ${EXTRA_CFLAGS}"
printf 'Pruning old configurations ...'
rm -f config.mk ; or_die
## System checks
# commands
check_cmd CC "$CC" || exit 1
check_cmd MAKE "$MAKE" || exit 1
if ! check_cmd GCOV "$GCOV"
then
	echo 'Notice: "coverage" target will fail'
	GCOV="false"
fi
if ! check_cmd MANDOC "$MANDOC"
then
	echo 'Notice: Linting depending on mandoc disabled'
	MANDOC="true"
fi
if ! check_cmd SHELLCHECK "$SHELLCHECK"
then
	echo 'Notice: Linting depending on shellcheck disabled'
	SHELLCHECK="true"
fi
if ! check_cmd FLAWFINDER "$FLAWFINDER"
then
	echo 'Notice: Linting depending on flawfinder disabled'
	FLAWFINDER="true"
fi
if ! check_header linux/hdreg.h
then
	target_filter="-e cmd/disk_id"
fi
echo
## Configuration write
printf 'Writing to config.mk ...'
cat >config.mk <<EOF
# Autogenerated by ./configure
PREFIX   = ${PREFIX}
BINDIR   = ${BINDIR}
MANDIR   = ${MANDIR}
CC = ${CC}
MAKE = ${MAKE}
MANDOC = ${MANDOC}
SHELLCHECK = ${SHELLCHECK}
FLAWFINDER = ${FLAWFINDER}
MSGFMT = ${MSGFMT}
DBG = ${DBG}
GCOV = ${GCOV}
REUSE = ${REUSE}
CFLAGS = ${CFLAGS}
LDFLAGS = ${LDFLAGS}
LDSTATIC = ${LDSTATIC}
EOF
is_ok
printf 'Generating targets ...'
gen_targets >> config.mk ; or_die
echo
echo 'Done, you can now run make'