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#!/bin/sh
# vim:ft=sh:ts=4:sw=4:noexpandtab
# Configured variables #####################################################
# Described in following format:
# name:initial value:type:if exported to makefile:if exported to C header
# Where type can be just a string (in C in "") or plain. None implies plain.
CNFS="PREFIX:/usr/local:string:T:F
EPREFIX:/usr/local:string:T:F
DEBUG:no::T:F
CPREFIX:::T:F
CC:cc::T:F
CFLAGS:::T:F
LFLAGS:::T:F"
############################################################################
# TODO add options to fine tune installation directories
print_help() {
echo "Usage: ./configure [OPTION]..."
echo "GEML configuration script. Execute this script to configure project"
echo "and prepare it for building."
echo
echo " --help, -h Give this help list"
echo " --debug, -d Enable development features."
echo " --release, -r Disable development features for project."
echo " --dep-check Force depencency check for this machine."
echo " --prefix=PREFIX Set PREFIX as installation prefix for"
echo " architecture independent files."
echo " In default /usr/local"
echo " --exec-prefix=EPREFIX Set EPREFIX as installation prefix for"
echo " architecture dependent files."
echo " In default PREFIX"
echo
echo "Environment variables:"
echo " CPREFIX Compilation tools prefix."
echo " CC C compiler command."
echo " CFLAGS C compiler flags."
echo " LDFLAGS C Linker flags."
}
CONFIG_FILE=.config
CONFIGURED_FILE=.configured # TODO
# Backup variables from environment
ENVVARS="CPREFIX CC CFLAGS LDFLAGS"
for E in $ENVVARS; do
eval "[ -n \"\${$E+y}\" ]" && eval "BACKUP_$E=\$$E"
done
# Load default configuration if variable not set from environment
eval `echo "$CNFS" | sed -ne 's/^\([^:]*\):\([^:]*\).*$/\1=\2/p'`
# Load existing configuration
if [ -f "$CONFIG_FILE" ]; then
. ./"$CONFIG_FILE"
fi
# Requested operation.
# c - Configure, default configuration behavior
# m - Prints output for Makefile
# h - Prints C header file (machine validation is skipped)
OP=c
# Parse arguments
while [ "$#" -gt 0 ]; do
case $1 in
-h|--help)
print_help
exit 0
;;
--prefix)
PREFIX=$2
[ -z "$EPREFIX_USER" ] && EPREFIX="$PREFIX"
shift
;;
--prefix=*)
PREFIX=${1#--prefix=}
[ -z "$EPREFIX_USER" ] && EPREFIX="$PREFIX"
;;
--exec-prefix)
EPREFIX=$2
EPREFIX_USER=y
shift
;;
--exec-prefix=*)
EPREFIX=${1#--exec-prefix=}
EPREFIX_USER=y
;;
-d|--debug)
DEBUG=yes
;;
-r|--release)
DEBUG=no
;;
--op-makefile)
OP=m
;;
--op-h)
OP=h
;;
*)
echo Unknown option $1 1>&2
exit 2
;;
esac
shift
done
# Recover from enviroment variables
for E in $ENVVARS; do
eval "[ -n \"\${BACKUP_$E+y}\" ]" && eval "$E=\$BACKUP_$E"
done
# Basically save configuration to file
configure() {
echo "# GEML configuration file" > "$CONFIG_FILE"
echo "# Please do not edit this file directly." >> "$CONFIG_FILE"
echo "$CNFS" | while read L; do
NAME=`echo "$L" | grep -o -E '^[^:]*'`
eval "VALUE=\$$NAME"
echo "$NAME=$VALUE" >> "$CONFIG_FILE"
done
echo "Configuration written to \"$CONFIG_FILE\""
}
# Generate Makefile and configure them if they doesn't exists in PWD
doext() {
if [ -f "Makefile" ] || [ -f configure ]; then
return
fi
GEMLDIR=`dirname "$0"`
echo "# This is external Makefile for GEML." > Makefile
echo >> Makefile
echo "GEML_PATH = $GEMLDIR" >> Makefile
echo >> Makefile
echo "MAKEARGS := -C \"\$(GEML_PATH)\"" >> Makefile
echo "MAKEARGS += O=\"\$(shell pwd)\"" >> Makefile
echo >> Makefile
echo "MAKEFLAGS += --no-print-directory" >> Makefile
echo >> Makefile
echo "Q ?= @" >> Makefile
echo ".PHONY: all \$(MAKECMDGOALS)" >> Makefile
echo "all \$(MAKECMDGOALS):" >> Makefile
echo " \$(Q)\$(MAKE) \$(MAKEARGS) \$@" >> Makefile
echo Created local Makefile
echo "# This is external configure script for GEML." > configure
echo "GEML_PATH=$GEMLDIR" >> configure
echo "cd \$(dirname \$0)" >> configure
echo "\$GEML_PATH/configure \$@" >> configure
chmod +x configure
echo Created local configure script
}
makefile() {
echo "$CNFS" | while read L; do
if [ `echo $L | awk -F ':' '{ print $4 }'` != "T" ]; then
continue
fi
NAME=`echo "$L" | grep -o -E '^[^:]*'`
eval "VALUE=\$$NAME"
echo "$NAME := $VALUE"
done
}
cheader() {
echo "$CNFS" | while read L; do
if [ `echo $L | awk -F ':' '{ print $5 }'` != "T" ]; then
continue
fi
NAME=`echo "$L" | grep -o -E '^[^:]*'`
eval "VALUE=\$$NAME"
if [ "`echo $L | awk -F ':' '{ print $3 }'`" = "string" ]; then
echo "#define $NAME \"$VALUE\""
else
echo "#define $NAME $VALUE"
fi
done
}
validate() {
echo -n
# TODO check dependencies and programs
}
case $OP in
c)
validate
doext
configure
;;
m)
validate
makefile
;;
h)
cheader
;;
esac
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