Replace most of the beforeinstall: hack with FILES mechanism.

This now generates the files into the OBJDIR as needed.  Some of the files
are installed directly from the src directory.  Files which are generated
from the src directory are renamed to .in to generate them and avoid
colliding with the checked-in file when CURDIR=OBJDIR.

The remaining beforeinstall: handling still needs to be reworked as it does
not work well with staging for packaging.

MFC after:	2 weeks
Sponsored by:	EMC / Isilon Storage Division

gnu/usr.bin/groff/tmac/Makefile

@@ -14,7 +14,7 @@ MLINKS=		groff_ms.7 ms.7
 MLINKS+=	groff_me.7 me.7
 MLINKS+=	groff_mdoc.7 mdoc.samples.7
 
-CLEANFILES=	${MAN} ${MDOCFILES:S/$/-s/} ${STRIPFILES:S/$/-s/} ${SPECIALFILES:S/$/-s/}
+CLEANFILES=	${MAN}
 
 NORMALFILES=	mandoc.tmac andoc.tmac an-old.tmac \
 		me.tmac \
@@ -39,45 +39,59 @@ NORMALFILES=	mandoc.tmac andoc.tmac an-old.tmac \
 		composite.tmac \
 		eqnrc \
 		troffrc troffrc-end \
+		koi8-r.tmac hyphen.ru \
 		hyphen.us hyphenex.us
+# These are all generated into the OBJDIR.
 SPECIALFILES=	an.tmac man.tmac s.tmac ms.tmac www.tmac
 STRIPFILES=	e.tmac doc.tmac mdoc.local
 MDOCFILES=	doc-common doc-ditroff doc-nroff doc-syms \
 		fr.ISO8859-1 ru.KOI8-R
+# These are in srcdir and must be built special to avoid colliding with
+# CURDIR=OBJDIR.
+SRCFILES=	fr.ISO8859-1 mdoc.local ru.KOI8-R
+CLEANFILES+=	${SRCFILES}
 
-all: ${MDOCFILES:S/$/-s/} ${STRIPFILES:S/$/-s/} ${SPECIALFILES:S/$/-s/}
+FILESGROUPS=	FILES
+FILES=		${NORMALFILES}
+FILESOWN=	${TMACOWN}
+FILESGRP=	${TMACGRP}
+FILESMODE=	${TMACMODE}
+FILESDIR=	${TMACDIR}
+MDOCFILESDIR=	${MDOCDIR}
 
-.for f in ${MDOCFILES} ${STRIPFILES}
-$f-s: $f
-	sed -f ${DIST_DIR}/strip.sed ${.ALLSRC} > ${.TARGET}
-.endfor
-
-.for f in ${SPECIALFILES}
-$f-s: $f
-	sed -e "s;@TMAC_AN_PREFIX@;${tmac_an_prefix};g" \
-	    -e "s;@TMAC_S_PREFIX@;${tmac_s_prefix};g" \
-	    -e "s;@PNMTOPS_NOSETPAGE@;pnmtops;g" \
-		${.ALLSRC} > ${.TARGET}
+# Setup handling for the generated and special file groups
+.for var in SPECIAL STRIP MDOC
+FILESGROUPS+=	${var}FILES
+CLEANFILES+=	${${var}FILES}
+${var}FILESOWN?=${TMACOWN}
+${var}FILESGRP?=${TMACGRP}
+${var}FILESMODE?=${TMACMODE}
+${var}FILESDIR?=${TMACDIR}
 .endfor
 
 beforeinstall:
-	(cd ${DIST_DIR} && \
-	    ${INSTALL} -o ${TMACOWN} -g ${TMACGRP} -m ${TMACMODE} \
-	    ${NORMALFILES} ${DESTDIR}${TMACDIR})
-	(cd ${.CURDIR} && \
-	    ${INSTALL} -o ${TMACOWN} -g ${TMACGRP} -m ${TMACMODE} \
-	    koi8-r.tmac hyphen.ru ${DESTDIR}${TMACDIR})
-.for f in ${STRIPFILES} ${SPECIALFILES}
-	${INSTALL} -o ${TMACOWN} -g ${TMACGRP} -m ${TMACMODE} \
-	    $f-s ${DESTDIR}${TMACDIR}/$f
-.endfor
-.for f in ${MDOCFILES}
-	${INSTALL} -o ${TMACOWN} -g ${TMACGRP} -m ${TMACMODE} \
-	    $f-s ${DESTDIR}${MDOCDIR}/$f
-.endfor
 .if !exists(${DESTDIR}${TMACDIR}/man.local)
 	${INSTALL} -o ${TMACOWN} -g ${TMACGRP} -m ${TMACMODE} \
 	    ${DIST_DIR}/man.local ${DESTDIR}${TMACDIR}
 .endif
 
 .include <bsd.prog.mk>
+
+# Do this after ../Makefile.inc gets included so DIST_DIR is defined.
+.for f in ${MDOCFILES} ${STRIPFILES}
+# Generate the file from the contrib dir or src dir as needed.
+.if ${SRCFILES:M${f}} != ""
+${f}: ${.CURDIR}/${f}.in
+.else
+${f}: ${DIST_DIR}/${f}
+.endif
+	sed -f ${DIST_DIR}/strip.sed ${.ALLSRC} > ${.TARGET}
+.endfor
+
+.for f in ${SPECIALFILES}
+${f}: ${DIST_DIR}/${f}
+	sed -e "s;@TMAC_AN_PREFIX@;${tmac_an_prefix};g" \
+	    -e "s;@TMAC_S_PREFIX@;${tmac_s_prefix};g" \
+	    -e "s;@PNMTOPS_NOSETPAGE@;pnmtops;g" \
+		${.ALLSRC} > ${.TARGET}
+.endfor