makegen

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#!/bin/sh
#
#	makegen generates Makefiles from simple template files.
#	Any line in a Makefile.tmpl file that starts with "!" causes
#	a shell script to be executed with it's output redirected into
#	the Makefile.  This is very simple but allows me to do things
#	like include Site.mm global definitions and protability stuff
#	without needing the new bsd make etc.
#
#						bambi
#

trap "rm -f Makefile.full; echo; echo ABORT!; echo; exit 1" 1 2 3 10 15 


# Is this a Posix or bsd-ish shell?

if echo '\c' | grep -s c >/dev/null 2>&1
then
	ECHO_N="-n"
	ECHO_C=""
else
	ECHO_N=""
	ECHO_C='\c'
fi


# Load the makegen config info
TOP=$1
INST_DIR=$2
export TOP
export INST_DIR

if test "$INST_DIR." = "."
then
	MACRO_DIR=$TOP
else
	MACRO_DIR=$INST_DIR
fi
export MACRO_DIR

OS_NAME=`uname -s | sed "s,/,_,"`
OS_RELEASE=`uname -r`
OS_ARCH=`uname -m`
if test $OS_NAME = "OS_2"
then
	OS_TYPE="_OS_OS2"
fi
if test $OS_NAME = "WIN32"
then
	OS_TYPE="_OS_WIN32"
fi
if test "$OS_TYPE." = "."
then
	OS_TYPE="_OS_UNIX"
fi

export OS_NAME
export OS_RELEASE
export OS_ARCH
export OS_TYPE

if test -f $TOP/makegen/makegen.cf
then
	. $TOP/makegen/makegen.cf
else
	if test -f $INST_DIR/makegen/makegen.cf
	then
		. $INST_DIR/makegen/makegen.cf
	else
		echo "Error !  Can't find makegen.cf !!"
		exit 1
	fi
fi

echo
echo Regenerating Makefile.
cat > Makefile.full << !EOF!
#
# This is a "makegen" generated Makefile based on Makefile.tmpl
#
# Makegen has been developed as part of Minerva by David J. Hughes
#
# ********************   DO NOT EDIT THIS BY HAND   ********************
#

SHELL=/bin/sh

#
# Project top directory and current directory (SOURCE_DIR can be redefined)
#

TOP=$TOP
SOURCE_DIR=.

#
# OS Information
#
OS_NAME=$OS_NAME
OS_RELEASE=$OS_RELEASE
OS_ARCH=$OS_ARCH
OS_TYPE=$OS_TYPE

!EOF!

cat $TOP/Site.mm >> Makefile.full

echo "

CC_FLAGS= \$(CFLAGS)
LD_LIBS= \$(LDLIBS)

#
# Default Makefile Rules
#

install :: all

clean ::
	rm -f Makefile.full

#
# Makefile Rules
#

" >> Makefile.full

T="	"
NL_IFS="
"
TS_IFS=" 	"
IFS="${NL_IFS}"

{
while read line
do
	echo $ECHO_N ".$ECHO_C"

	#
	# bash stuffs up reads sometimes by dropping a ^A around \\ escapes
	# It's a hack, but stripping them out like this works.
	#

	line=`echo $line | sed "s/
//g"`

	if echo $line | grep "^[ $T]*!"> /dev/null
	then
		command=`echo $line | \
		sed "s,^[ $T]*!\([a-zA-Z0-9_]*\).*,${MACRO_DIR}\/makegen\/\1.mm,"`
		args=`echo $line | \
		sed "s,^[ $T]*!\([a-zA-Z0-9_]*\)\(.*\),\2,"`
		IFS="$TS_IFS"
		if test ! -f $command
		then
			echo
			echo "Unknown makegen command \"$command\""
			echo
			rm -f Makefile.full
			exit 2
		fi
		$command $args >> Makefile.full
		IFS="$NL_IFS"
	else
		# The sed hack below is for 4.4BSD's shell that doesn't
		# replace \\ with \ during a read.
		echo "$line"  | sed "s/\\\\\\\\/\\\\/g
				     s/\\\\\\\\/\\\\/g" >> Makefile.full
	fi
done
} < Makefile.tmpl
echo >> Makefile.full
echo >> Makefile.full
echo
echo "Done."