Non-local source caches:
------------------------

Codify a way to (in a Makefile) poll a remote source repository with
tftp, ftp, http, rsync, or some other protocol to explode remote
source for a local build.

Later find a way to do more URLS than http and ftp with wget, so wget
might need a -pipe option -- a nice thing in general.  Also add tftp
to wget.


More versital expansion:
------------------------

Use m4, or something like it?
/*@Filter "m4 -"@*/
define(...)dnl
...
/*@Explode ...@*/


Or allow non-comment escapes to a shell/environment/expander?
{Viz. $var, function params, \octal, and the like.}

/*@Configure open-expand close-expand@*/

/*@Configure << >>@*/
# makefile for <<$FILE>>
#			by <<$NAME>>, PUCC

BIN=	${DESTDIR}$$HOME/bin
MANROOT=${DESTDIR}/usr/man

I=/usr/include
S=/usr/include/sys
P=

INCLUDE=
DEBUG=	-O
CDEFS=	
CFLAGS= ${DEBUG} ${CDEFS} ${INCLUDE}

SRC=	<<glob *.c>>
GENh=	main.h
GENc=	main.c
GEN=	${GENh} ${GENc}
DEP=	${GENc} ${SRC}
OBJ=	main.o explode.o
MAN=	<<glob *man>>
SOURCE=	Makefile <<glob *.m>> <<glob README>> ${HDR} ${SRC} ${MAN}

all: explode

explode:$P ${OBJ}
	${CC} -o $@ ${CFLAGS} ${OBJ}

main.h: main.c

# should be `mk explode.m' really
main.c: explode.m
	mkcmd std_help.m std_version.m explode.m
	-(cmp -s prog.c main.c || (cp prog.c main.c && echo main.c updated))
	-(cmp -s prog.h main.h || (cp prog.h main.h && echo main.h updated))
	rm -f prog.[ch]

clean: FRC
	rm -f explode ${GEN} *.o Makefile.bak a.out core errs tags

depend: ${GEN} ${SRC} ${HDR} FRC
	maketd ${CDEFS} ${INCLUDE} ${DEP}

install: all FRC
	install -c -s explode ${BIN}

lint: ${HDR} ${SRC} ${GEN} FRC
	lint -hnx ${CDEFS} ${INCLUDE} ${DEP}

mkcat: ${MAN}
	mkcat -r${MANROOT} ${MAN}

print: source FRC
	lpr -J'explode source' ${SOURCE}

source: ${SOURCE}

spotless: clean
	rcsclean ${SOURCE}

tags: ${SRC} ${HDR} ${GEN}
	ctags -t ${SRC} ${HDR} ${GEN}

${SOURCE}:
	co -q $@

FRC:

# DO NOT DELETE THIS LINE - maketd DEPENDS ON IT

main.o: $I/stdio.h main.c

explode.o: $I/ctype.h $I/signal.h $I/stdio.h $S/file.h explode.c main.h

# *** Do not add anything here - It will go away. ***