Put the test suite in its own tests.txz distribution file.

Force all the contents of /usr/tests to go into a separate distribution
file so that users of binary releases can easily choose to not install it.

To make this possible, we need two fixes:
- bsd.subdir.mk needs to properly honor NO_SUBDIR in all cases so that we
  do not recurse into 'tests' subdirectories when we needn't.  Otherwise,
  we end up with some Kyuafiles in base.txz.
- etc/Makefile needs to skip installing tests in its 'distribute' target
  so that a Kyuafile doesn't leak into base.txz.

Approved by:	gjb

Makefile.inc1

@@ -776,6 +776,9 @@ EXTRA_DISTRIBUTIONS+=	games
 .if defined(LIB32TMP) && ${MK_LIB32} != "no"
 EXTRA_DISTRIBUTIONS+=	lib32
 .endif
+.if ${MK_TESTS} != "no"
+EXTRA_DISTRIBUTIONS+=	tests
+.endif
 
 MTREE_MAGIC?=	mtree 2.0
 
@@ -817,6 +820,10 @@ distributeworld installworld: _installcheck_world
 	mtree -deU -f ${.CURDIR}/etc/mtree/BSD.debug.dist \
 	    -p ${DESTDIR}/${DISTDIR}/${dist}/usr/lib >/dev/null
 .endif
+.if ${MK_TESTS} != "no" && ${dist} == "tests"
+	mtree -deU -f ${.CURDIR}/etc/mtree/BSD.tests.dist \
+	    -p ${DESTDIR}/${DISTDIR}/${dist}/usr >/dev/null
+.endif
 .if defined(NO_ROOT)
 	${IMAKEENV} mtree -C -f ${.CURDIR}/etc/mtree/BSD.root.dist | \
 	    sed -e 's#^\./#./${dist}/#' >> ${METALOG}

etc/Makefile

@@ -174,7 +174,10 @@ afterinstall:
 .endif
 
 distribute:
-	${_+_}cd ${.CURDIR} ; ${MAKE} install DESTDIR=${DISTDIR}/${DISTRIBUTION}
+	# Avoid installing tests here; "make distribution" will do this and
+	# correctly place them in the right location.
+	${_+_}cd ${.CURDIR} ; ${MAKE} MK_TESTS=no install \
+	    DESTDIR=${DISTDIR}/${DISTRIBUTION}
 	${_+_}cd ${.CURDIR} ; ${MAKE} distribution DESTDIR=${DISTDIR}/${DISTRIBUTION}
 
 .include <bsd.endian.mk>

share/mk/bsd.subdir.mk

@@ -81,6 +81,7 @@ __subdir_targets+= .WAIT
 .else
 __subdir_targets+= ${__target}_subdir_${__dir}
 ${__target}_subdir_${__dir}: .MAKE
+.if !defined(NO_SUBDIR)
 	@${_+_}set -e; \
 		if test -d ${.CURDIR}/${__dir}.${MACHINE_ARCH}; then \
 			${ECHODIR} "===> ${DIRPRFX}${__dir}.${MACHINE_ARCH} (${__target:realinstall=install})"; \
@@ -94,6 +95,7 @@ ${__target}_subdir_${__dir}: .MAKE
 		${MAKE} ${__target:realinstall=install} \
 		    DIRPRFX=${DIRPRFX}$$edir/
 .endif
+.endif
 .endfor
 ${__target}: ${__subdir_targets}
 .else

share/mk/bsd.test.mk

@@ -27,6 +27,15 @@ TESTS_SUBDIRS?=
 # List of variables to pass to the tests at run-time via the environment.
 TESTS_ENV?=
 
+# Force all tests in a separate distribution file.
+#
+# We want this to be the case even when the distribution name is already
+# overriden.  For example: we want the tests for programs in the 'games'
+# distribution to end up in the 'tests' distribution; the test programs
+# themselves have all the necessary logic to detect that the games are not
+# installed and thus won't cause false negatives.
+DISTRIBUTION:=	tests
+
 # Ordered list of directories to construct the PATH for the tests.
 TESTS_PATH+= ${DESTDIR}/bin ${DESTDIR}/sbin \
              ${DESTDIR}/usr/bin ${DESTDIR}/usr/sbin