Start rewriting build system.

1 files changed, 171 insertions, 140 deletions

diff --git a/configure b/configure
index 26c658a..ea0e98c 100755
--- a/configure
+++ b/configure
@@ -19,12 +19,71 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-PACKAGE='opkhelper'
-VERSION='1.0.0'
+package_name='opkhelper'
+package_version='2.0.0'
+
+srcdir=$(dirname "${0}")
+srcdir=$(cd ${srcdir} && pwd)
+prefix='/usr/local'
+bindir='$(prefix)/bin'
+libdir='$(prefix)/lib/opkhelper'
+datadir='$(prefix)/share'
+mandir='$(datadir)/man'
+localedir='$(datadir)/locale'
+
+quiet=false
+missing_deps=false
+dep_cmds='
+install
+sh
+'
+
+long_opts_with_args='
+srcdir
+prefix
+bindir
+libdir
+datadir
+mandir
+localedir
+'
+
+features="${dep_cmds}"
+
+subst_vars="package_name
+package_version
+${long_opts_with_args}
+${dep_cmds}"
+
+main()
+{
+	parse_options "${@}"
+
+	for dep in ${dep_cmds}; do
+		dep_val=$(eval echo \$\{"${dep}"\})
+		if [ -z "${dep_val}" ]; then
+			find_dep_cmd "${dep}"
+		fi
+	done
+
+	if ${missing_deps}; then
+		cat <<EOF
+
+Some dependencies could not be found.
+Please make sure all dependencies are installed and try again.
+
+EOF
+		exit 1
+	fi
+
+	write_makefiles
+
+	printf '\nConfiguration complete!\n\n'
+}
 
 print_usage()
 {
-	printf 'Usage: %s [OPTION]...\n' "$1"
+	printf 'Usage: %s [OPTION]...\n' "${0}"
 }
 
 print_help()
@@ -32,7 +91,7 @@ print_help()
 	cat <<EOF
 \`configure' configures ${PACKAGE} ${VERSION} to adapt to many kinds of systems.
 
-$(print_usage "${1}")
+$(print_usage)
 
 Configuration:
   -h, --help            display this help and exit
@@ -51,14 +110,16 @@ Installation directories:
   --datadir=DATADIR     expect to find data in DATADIR
                         default: PREFIX/share
   --mandir=MANDIR       install manual pages in MANDIR
-                        default: PREFIX/share/man
+                        default: DATADIR/man
+  --localedir=LOCALEDIR install locales in LOCALEDIR
+                        default: DATADIR/man
 EOF
 }
 
 print_version()
 {
 	cat <<EOF
-${PACKAGE} ${VERSION} configure
+${package_name} ${package_version} configure
 Not generated by GNU Autoconf
 
 Copyright (C) 2011-2012 Patrick "P. J." McDermott
@@ -68,148 +129,118 @@ There is NO WARRANTY, to the extent permitted by law.
 EOF
 }
 
-opts=$(getopt -n "${0}" -o 'hVq' -l 'help,version,quiet' \
-	-l 'srcdir:,prefix:,bindir:,libdir:,mandir:' -- "${@}")
-if [ ${?} -ne 0 ]; then
-	print_usage "${0}" >&2
-	exit 1;
-fi
-eval set -- "${opts}"
-while true; do
-	case "${1}" in
-		-h|--help)
-			print_help "${0}"
-			exit 0
-			;;
-		-V|--version)
-			print_version
-			exit 0
-			;;
-		-q|--quiet)
-			QUIET=true
-			shift
-			;;
-		--srcdir)
-			SRCDIR="${2}"
-			shift 2
-			;;
-		--prefix)
-			PREFIX="${2}"
-			shift 2
-			;;
-		--bindir)
-			# Leave PREFIX unexpanded for now, in case it isn't set yet.
-			BINDIR="\${PREFIX}/${2}"
-			shift 2
-			;;
-		--libdir)
-			# Leave PREFIX unexpanded for now, in case it isn't set yet.
-			LIBDIR="\${PREFIX}/${2}"
-			shift 2
-			;;
-		--datadir)
-			# Leave PREFIX unexpanded for now, in case it isn't set yet.
-			DATADIR="\${PREFIX}/${2}"
-			shift 2
-			;;
-		--mandir)
-			# Leave PREFIX unexpanded for now, in case it isn't set yet.
-			MANDIR="\${PREFIX}/${2}"
-			shift 2
-			;;
-		--)
-			shift
-			break
-			;;
-		*)
-			print_usage "${0}" >&2
+parse_options()
+{
+	for _opt; do
+
+		# Handle arguments of "--opt arg" options.
+		if [ -n "${_prev}" ]; then
+			eval "${_prev}=\$\{_opt\}"
+			_prev=
+			continue
+		fi
+
+		# Detect "--opt=arg" and "--opt arg" options.
+		case "${_opt}" in
+			*=*)
+				_optarg="${_opt#*=}"
+				_opt="${_opt%=*}"
+				_optarg_set=true
+				;;
+			*)
+				_optarg_set=false
+				;;
+		esac
+
+		# Handle short and long options.
+		case "${_opt}" in
+			--)
+				break
+				;;
+			-h|--help)
+				print_help
+				exit 0
+				;;
+			-V|--version)
+				print_version
+				exit 0
+				;;
+			-q|--quiet)
+				quiet=true
+				continue
+				;;
+		esac
+
+		# Anything beyond this point should be a long option.
+		case "${_opt}" in
+			--with-*)
+				_opt="${_opt#--with-}"
+				_opts="${features}"
+				_type=package
+				;;
+			--*)
+				_opt="${_opt#--}"
+				_opts="${long_opts_with_args}"
+				_type=option
+				;;
+			*)
+				printf 'unrecognized option: %s\n' "${_opt}" >&2
+				exit 1
+				;;
+		esac
+
+		grep "^${_opt}\$" >/dev/null 2>&1 <<EOF
+"${_opts}"
+EOF
+		if [ ${?} -ne 0 ]; then
+			printf 'invalid %s name: %s\n' "${_type}" "${_opt}" >&2
 			exit 1
-			;;
-	esac
-done
-
-if [ -z "${QUIET}" ]; then
-	QUIET=false
-fi
-
-if [ -z "${SRCDIR}" ]; then
-	SRCDIR=$(dirname "${0}")
-fi
-# Make SRCDIR an absolute path if it isn't already.
-SRCDIR=$(cd ${SRCDIR} && pwd)
-if [ -z "${PREFIX}" ]; then
-	PREFIX=/usr/local
-fi
-if [ -z "${BINDIR}" ]; then
-	BINDIR=${PREFIX}/bin
-fi
-if [ -z "${LIBDIR}" ]; then
-	LIBDIR=${PREFIX}/lib
-fi
-if [ -z "${DATADIR}" ]; then
-	DATADIR=${PREFIX}/share
-fi
-if [ -z "${MANDIR}" ]; then
-	MANDIR=${PREFIX}/share/man
-fi
-# Expand PREFIX if it's there.
-eval "BINDIR=${BINDIR}"
-eval "LIBDIR=${LIBDIR}"
-eval "DATADIR=${DATADIR}"
-eval "MANDIR=${MANDIR}"
-
-find_dependency()
+		fi
+		if ${_optarg_set}; then
+			eval ${_opt}=\$\{_optarg\}
+		else
+			_prev="${_opt}"
+		fi
+
+	done
+}
+
+find_dep_cmd()
 {
-	dep=${1}
-	var=${2}
-	shift 2
+	_dep="${1}"
 
-	${QUIET} || printf 'checking for %s... ' "${dep}"
+	${quiet} || printf 'checking for %s... ' "${dep}"
 
-	while [ ${#} -gt 0 ]; do
-		if [ -f "${1}/${dep}" ]; then
-			${QUIET} || printf '%s/%s\n' "${1}" "${dep}"
-			eval "${var}=${1}/${dep}"
+	_old_ifs="${IFS}"
+	IFS=:
+
+	for _element in ${PATH}; do
+		: ${_element=-.}
+		if [ -f "${_element}/${_dep}" -a -x "${_element}/${_dep}" ]; then
+			${quiet} || printf '%s/%s\n' "${_element}" "${_dep}"
+			eval "${_dep}=${_element}/${_dep}"
+			IFS="${_old_ifs}"
 			return 0
 		fi
-		shift
 	done
 
-	${QUIET} || printf 'not found\n'
-	missing_dependencies=true
+	IFS="${_old_ifs}"
+	${quiet} || printf 'not found\n'
+	missing_deps=true
 	return 1
 }
 
-missing_dependencies=false
-
-find_dependency sh SHELL /bin
-find_dependency install INSTALL /usr/bin
-find_dependency make MAKE /usr/bin
-
-if ${missing_dependencies}; then
-	printf '\nSome dependencies could not be found.\n'
-	printf 'Please make sure all dependencies are installed and try again.\n\n'
-	exit 1
-fi
-
-sed_script="
-s&@shell@&${SHELL}&
-s&@install@&${INSTALL} -c&
-s&@make@&${MAKE}&
-s&@srcdir@&${SRCDIR}&
-s&@prefix@&${PREFIX}&
-s&@bindir@&${BINDIR}&
-s&@libdir@&${LIBDIR}&
-s&@datadir@&${DATADIR}&
-s&@mandir@&${MANDIR}&
-s&@package@&${PACKAGE}&
-s&@version@&${VERSION}&"
-
-# Replace configuration variables in Makefile.in
-mkdir -p src lib man
-sed "$sed_script" ${SRCDIR}/Makefile.in > Makefile
-sed "$sed_script" ${SRCDIR}/src/Makefile.in > src/Makefile
-sed "$sed_script" ${SRCDIR}/lib/Makefile.in > lib/Makefile
-sed "$sed_script" ${SRCDIR}/man/Makefile.in > man/Makefile
-
-printf '\nConfiguration complete!\n\n'
+write_makefiles()
+{
+	# Make a script to edit input makefiles.
+	_sed_script=
+	for _var in ${subst_vars}; do
+		_sed_script="${_sed_script}s&@${_var}@&$(eval echo \$\{"${_var}"\})&g;"
+	done
+
+	for _dir in . src lib locale man; do
+		sed "${_sed_script}" "${srcdir}/${_dir}/Makefile.in" >"${_dir}/Makefile"
+	done
+}
+
+main "${@}"