Fix atf-sh's integration_test

With the move of atf-sh into /usr/libexec in r267181, some of the
tests in the integration_test program broke because they could not
execute atf-sh from the path any longer.

This slipped through because I do have a local atf installation in
my home directory that appears in my path, hence the tests could
still execute my own version.

Fix this by forcing /usr/libexec to appear at the beginning of the
path when attempting to execute atf-sh.

To make upgrading easy (and to avoid an unnecessary entry in UPDATING),
make integration_test depend on the Makefile so that a rebuild of the
shell script is triggered.  This requires a hack in the *.test.mk files
to ensure the Makefile is not treated as a source to the generated
program.  Ugly, I know, but I don't have a better way of doing this at
the moment.  Will think of one once I address the TODO in the *.test.mk
files that suggests generalizing the file generation functionality.

PR:		191052
Reviewed by:	Garrett Cooper

libexec/atf/atf-sh/tests/Makefile

@@ -10,12 +10,15 @@ ATF=		${.CURDIR:H:H:H:H}/contrib/atf
 ATF_TESTS_SH+=	atf_check_test
 ATF_TESTS_SH+=	config_test
 ATF_TESTS_SH+=	integration_test
-ATF_TESTS_SH_SED_integration_test= \
-    -e 's,/usr/bin/env *atf-sh,/usr/libexec/atf-sh,g'
 ATF_TESTS_SH+=	normalize_test
 ATF_TESTS_SH+=	tc_test
 ATF_TESTS_SH+=	tp_test
 
+integration_test: Makefile
+ATF_TESTS_SH_SED_integration_test= \
+    -e 's,atf_check,PATH=/usr/libexec:$${PATH} atf_check,g' \
+    -e 's,/usr/bin/env *atf-sh,/usr/libexec/atf-sh,g'
+
 SCRIPTS+=		misc_helpers
 SCRIPTSDIR_misc_helpers=${TESTSDIR}
 CLEANFILES+=		misc_helpers misc_helpers.tmp

share/mk/atf.test.mk

@@ -105,7 +105,8 @@ ATF_TESTS_SH_SED_${_T}?= # empty
 ATF_TESTS_SH_SRC_${_T}?= ${_T}.sh
 ${_T}: ${ATF_TESTS_SH_SRC_${_T}}
 	echo '#! /usr/libexec/atf-sh' > ${.TARGET}.tmp
-	cat ${.ALLSRC} | sed ${ATF_TESTS_SH_SED_${_T}} >>${.TARGET}.tmp
+	cat ${.ALLSRC:N*Makefile*} \
+	    | sed ${ATF_TESTS_SH_SED_${_T}} >>${.TARGET}.tmp
 	chmod +x ${.TARGET}.tmp
 	mv ${.TARGET}.tmp ${.TARGET}
 .endfor

share/mk/plain.test.mk

@@ -57,7 +57,8 @@ CLEANFILES+= ${_T} ${_T}.tmp
 PLAIN_TESTS_SH_SED_${_T}?= # empty
 PLAIN_TESTS_SH_SRC_${_T}?= ${_T}.sh
 ${_T}: ${PLAIN_TESTS_SH_SRC_${_T}}
-	cat ${.ALLSRC} | sed ${PLAIN_TESTS_SH_SED_${_T}} >${.TARGET}.tmp
+	cat ${.ALLSRC:N*Makefile*} \
+	    | sed ${PLAIN_TESTS_SH_SED_${_T}} >${.TARGET}.tmp
 	chmod +x ${.TARGET}.tmp
 	mv ${.TARGET}.tmp ${.TARGET}
 .endfor

share/mk/tap.test.mk

@@ -66,7 +66,7 @@ TAP_TESTS_PERL_SRC_${_T}?= ${_T}.pl
 ${_T}: ${TAP_TESTS_PERL_SRC_${_T}}
 	{ \
 	    echo '#! ${TAP_PERL_INTERPRETER}'; \
-	    cat ${.ALLSRC} | sed ${TAP_TESTS_PERL_SED_${_T}}; \
+	    cat ${.ALLSRC:N*Makefile*} | sed ${TAP_TESTS_PERL_SED_${_T}}; \
 	} >${.TARGET}.tmp
 	chmod +x ${.TARGET}.tmp
 	mv ${.TARGET}.tmp ${.TARGET}