Centralize variable substitution

A bunch of places need to edit files to incorporate the configured paths
i.e. bindir, sbindir etc. Move this logic into a common file.

Create arc_summary by copying arc_summary[23] as appropriate at build
time instead of install time.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10559

Makefile.am

@@ -54,7 +54,7 @@ CLEANFILES = $(GITREV)
 
 PHONY = gitrev
 gitrev:
-	ZFS_GITREV=$$(cd $(top_srcdir) && \
+	$(AM_V_GEN)ZFS_GITREV=$$(cd $(top_srcdir) && \
 		git describe --always --long --dirty 2>/dev/null); \
 	ZFS_GITREV=$${ZFS_GITREV:-unknown}; \
 	printf '#define\tZFS_META_GITREV "%s"\n' \

cmd/arc_summary/.gitignore

@@ -0,0 +1 @@
+arc_summary

cmd/arc_summary/Makefile.am

@@ -1,4 +1,7 @@
-transform = $(program_transform_name)
+bin_SCRIPTS = arc_summary
+
+CLEANFILES = arc_summary
+EXTRA_DIST = arc_summary2 arc_summary3
 
 if USING_PYTHON_2
 SCRIPT = arc_summary2
@@ -6,9 +9,5 @@ else
 SCRIPT = arc_summary3
 endif
 
-dist_bin_SCRIPTS = $(SCRIPT)
-
-install-exec-hook:
-	before=$$(echo $(SCRIPT) | sed '$(transform)'); \
-	after=$$(echo arc_summary | sed '$(transform)'); \
-	mv "$(DESTDIR)$(bindir)/$$before" "$(DESTDIR)$(bindir)/$$after"
+arc_summary: $(SCRIPT)
+	cp $< $@

cmd/arcstat/.gitignore

@@ -0,0 +1 @@
+arcstat

cmd/arcstat/Makefile.am

@@ -1,13 +1,5 @@
-dist_bin_SCRIPTS = arcstat
+include $(top_srcdir)/config/Substfiles.am
 
-#
-# The arcstat script is compatible with both Python 2.6 and 3.4.
-# As such the python 3 shebang can be replaced at install time when
-# targeting a python 2 system.  This allows us to maintain a single
-# version of the source.
-#
-if USING_PYTHON_2
-install-exec-hook:
-	$(SED) ${ac_inplace} -e 's|^#!/usr/bin/env python3|#!/usr/bin/env python2|' \
-	    $(DESTDIR)$(bindir)/arcstat
-endif
+bin_SCRIPTS = arcstat
+
+SUBSTFILES += $(bin_SCRIPTS)

cmd/arcstat/arcstat.in

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env @PYTHON_SHEBANG@
 #
 # Print out ZFS ARC Statistics exported via kstat(1)
 # For a definition of fields, or usage, use arcstat -v

cmd/dbufstat/.gitignore

@@ -0,0 +1 @@
+dbufstat

cmd/dbufstat/Makefile.am

@@ -1,13 +1,5 @@
-dist_bin_SCRIPTS = dbufstat
+include $(top_srcdir)/config/Substfiles.am
 
-#
-# The dbufstat script is compatible with both Python 2.6 and 3.4.
-# As such the python 3 shebang can be replaced at install time when
-# targeting a python 2 system.  This allows us to maintain a single
-# version of the source.
-#
-if USING_PYTHON_2
-install-exec-hook:
-	$(SED) ${ac_inplace} -e 's|^#!/usr/bin/env python3|#!/usr/bin/env python2|' \
-	    $(DESTDIR)$(bindir)/dbufstat
-endif
+bin_SCRIPTS = dbufstat
+
+SUBSTFILES += $(bin_SCRIPTS)

cmd/dbufstat/dbufstat.in

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env @PYTHON_SHEBANG@
 #
 # Print out statistics for all cached dmu buffers.  This information
 # is available through the dbufs kstat and may be post-processed as

cmd/zed/zed.d/Makefile.am

@@ -1,8 +1,7 @@
 include $(top_srcdir)/config/Rules.am
+include $(top_srcdir)/config/Substfiles.am
 
-EXTRA_DIST = \
-	README \
-	history_event-zfs-list-cacher.sh.in
+EXTRA_DIST += README
 
 zedconfdir = $(sysconfdir)/zfs/zed.d
 
@@ -29,12 +28,7 @@ dist_zedexec_SCRIPTS = \
 
 nodist_zedexec_SCRIPTS = history_event-zfs-list-cacher.sh
 
-$(nodist_zedexec_SCRIPTS): %: %.in
-	-$(SED) -e 's,@bindir\@,$(bindir),g' \
-		-e 's,@runstatedir\@,$(runstatedir),g' \
-		-e 's,@sbindir\@,$(sbindir),g' \
-		-e 's,@sysconfdir\@,$(sysconfdir),g' \
-		$< >'$@'
+SUBSTFILES += $(nodist_zedexec_SCRIPTS)
 
 zedconfdefaults = \
 	all-syslog.sh \

config/Substfiles.am

@@ -0,0 +1,34 @@
+subst_sed_cmd = \
+	-e 's|@bindir[@]|$(bindir)|g' \
+	-e 's|@sbindir[@]|$(sbindir)|g' \
+	-e 's|@datadir[@]|$(datadir)|g' \
+	-e 's|@sysconfdir[@]|$(sysconfdir)|g' \
+	-e 's|@runstatedir[@]|$(runstatedir)|g' \
+	-e 's|@initconfdir[@]|$(initconfdir)|g' \
+	-e 's|@initdir[@]|$(initdir)|g' \
+	-e 's|@mounthelperdir[@]|$(mounthelperdir)|g' \
+	-e 's|@systemdgeneratordir[@]|$(systemdgeneratordir)|g' \
+	-e 's|@systemdunitdir[@]|$(systemdunitdir)|g' \
+	-e 's|@udevdir[@]|$(udevdir)|g' \
+	-e 's|@udevruledir[@]|$(udevruledir)|g' \
+	-e 's|@zfsexecdir[@]|$(zfsexecdir)|g' \
+	-e 's|@PYTHON[@]|$(PYTHON)|g' \
+	-e 's|@PYTHON_SHEBANG[@]|$(PYTHON_SHEBANG)|g' \
+	-e 's|@DEFAULT_INIT_NFS_SERVER[@]|$(DEFAULT_INIT_NFS_SERVER)|g' \
+	-e 's|@DEFAULT_INIT_SHELL[@]|$(DEFAULT_INIT_SHELL)|g'
+
+SUBSTFILES =
+CLEANFILES = $(SUBSTFILES)
+EXTRA_DIST = $(SUBSTFILES:=.in)
+
+$(SUBSTFILES):%:%.in Makefile
+	$(AM_V_GEN)set -e; \
+	$(MKDIR_P) $$(dirname $@); \
+	$(RM) $@~; \
+	$(SED) $(subst_sed_cmd) $< >$@~; \
+	if grep -E '@[a-zA-Z0-9_]+@' $@~ >&2; then \
+		echo "Undefined substitution" >&2; \
+		exit 1; \
+	else test $$? -eq 1; fi; \
+	test -x $< && chmod +x $@~; \
+	mv -f $@~ $@

config/always-python.m4

@@ -49,6 +49,10 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_PYTHON], [
 	AM_CONDITIONAL([USING_PYTHON_2], [test "x${PYTHON_VERSION%%\.*}" = x2])
 	AM_CONDITIONAL([USING_PYTHON_3], [test "x${PYTHON_VERSION%%\.*}" = x3])
 
+	AM_COND_IF([USING_PYTHON_2],
+		[AC_SUBST([PYTHON_SHEBANG], [python2])],
+		[AC_SUBST([PYTHON_SHEBANG], [python3])])
+
 	dnl #
 	dnl # Request that packages be built for a specific Python version.
 	dnl #

config/zfs-build.m4

@@ -266,7 +266,7 @@ AC_DEFUN([ZFS_AC_RPM], [
 	RPM_DEFINE_COMMON=${RPM_DEFINE_COMMON}' --define "$(DEBUG_KMEM_TRACKING_ZFS) 1"'
 	RPM_DEFINE_COMMON=${RPM_DEFINE_COMMON}' --define "$(ASAN_ZFS) 1"'
 
-	RPM_DEFINE_UTIL=' --define "_initconfdir $(DEFAULT_INITCONF_DIR)"'
+	RPM_DEFINE_UTIL=' --define "_initconfdir $(initconfdir)"'
 
 	dnl # Make the next three RPM_DEFINE_UTIL additions conditional, since
 	dnl # their values may not be set when running:
@@ -469,13 +469,13 @@ AC_DEFUN([ZFS_AC_DEFAULT_PACKAGE], [
 
 	AC_MSG_CHECKING([default init directory])
 	case "$VENDOR" in
-		freebsd)    DEFAULT_INIT_DIR=$sysconfdir/rc.d  ;;
-		*)          DEFAULT_INIT_DIR=$sysconfdir/init.d;;
+		freebsd)    initdir=$sysconfdir/rc.d  ;;
+		*)          initdir=$sysconfdir/init.d;;
 	esac
-	AC_MSG_RESULT([$DEFAULT_INIT_DIR])
-	AC_SUBST(DEFAULT_INIT_DIR)
+	AC_MSG_RESULT([$initdir])
+	AC_SUBST(initdir)
 
-	AC_MSG_CHECKING([default init script type])
+	AC_MSG_CHECKING([default init script type and shell])
 	case "$VENDOR" in
 		toss)       DEFAULT_INIT_SCRIPT=redhat ;;
 		redhat)     DEFAULT_INIT_SCRIPT=redhat ;;
@@ -491,24 +491,44 @@ AC_DEFUN([ZFS_AC_DEFAULT_PACKAGE], [
 		freebsd)    DEFAULT_INIT_SCRIPT=freebsd;;
 		*)          DEFAULT_INIT_SCRIPT=lsb    ;;
 	esac
-	AC_MSG_RESULT([$DEFAULT_INIT_SCRIPT])
+
+	# On gentoo, it's possible that OpenRC isn't installed.  Check if
+	# /sbin/openrc-run exists, and if not, fall back to generic defaults.
+
+	DEFAULT_INIT_SHELL="/bin/sh"
+	AS_IF([test "$DEFAULT_INIT_SCRIPT" = "openrc"], [
+		AS_IF([test -x "/sbin/openrc-run"],
+			[DEFAULT_INIT_SHELL="/sbin/openrc-run"],
+			[DEFAULT_INIT_SCRIPT=lsb])
+	])
+
+	AC_MSG_RESULT([$DEFAULT_INIT_SCRIPT:$DEFAULT_INIT_SHELL])
 	AC_SUBST(DEFAULT_INIT_SCRIPT)
+	AC_SUBST(DEFAULT_INIT_SHELL)
+
+	AC_MSG_CHECKING([default nfs server init script])
+	AS_IF([test "$VENDOR" = "debian"],
+		[DEFAULT_INIT_NFS_SERVER="nfs-kernel-server"],
+		[DEFAULT_INIT_NFS_SERVER="nfs"]
+	)
+	AC_MSG_RESULT([$DEFAULT_INIT_NFS_SERVER])
+	AC_SUBST(DEFAULT_INIT_NFS_SERVER)
 
 	AC_MSG_CHECKING([default init config directory])
 	case "$VENDOR" in
-		alpine)     DEFAULT_INITCONF_DIR=/etc/conf.d    ;;
-		gentoo)     DEFAULT_INITCONF_DIR=/etc/conf.d    ;;
-		toss)       DEFAULT_INITCONF_DIR=/etc/sysconfig ;;
-		redhat)     DEFAULT_INITCONF_DIR=/etc/sysconfig ;;
-		fedora)     DEFAULT_INITCONF_DIR=/etc/sysconfig ;;
-		sles)       DEFAULT_INITCONF_DIR=/etc/sysconfig ;;
-		ubuntu)     DEFAULT_INITCONF_DIR=/etc/default   ;;
-		debian)     DEFAULT_INITCONF_DIR=/etc/default   ;;
-		freebsd)    DEFAULT_INITCONF_DIR=$sysconfdir/rc.conf.d;;
-		*)          DEFAULT_INITCONF_DIR=/etc/default   ;;
+		alpine)     initconfdir=/etc/conf.d    ;;
+		gentoo)     initconfdir=/etc/conf.d    ;;
+		toss)       initconfdir=/etc/sysconfig ;;
+		redhat)     initconfdir=/etc/sysconfig ;;
+		fedora)     initconfdir=/etc/sysconfig ;;
+		sles)       initconfdir=/etc/sysconfig ;;
+		ubuntu)     initconfdir=/etc/default   ;;
+		debian)     initconfdir=/etc/default   ;;
+		freebsd)    initconfdir=$sysconfdir/rc.conf.d;;
+		*)          initconfdir=/etc/default   ;;
 	esac
-	AC_MSG_RESULT([$DEFAULT_INITCONF_DIR])
-	AC_SUBST(DEFAULT_INITCONF_DIR)
+	AC_MSG_RESULT([$initconfdir])
+	AC_SUBST(initconfdir)
 
 	AC_MSG_CHECKING([whether initramfs-tools is available])
 	if test -d /usr/share/initramfs-tools ; then

contrib/dracut/02zfsexpandknowledge/Makefile.am

@@ -1,18 +1,7 @@
+include $(top_srcdir)/config/Substfiles.am
+
 pkgdracutdir = $(dracutdir)/modules.d/02zfsexpandknowledge
 pkgdracut_SCRIPTS = \
 	module-setup.sh
 
-EXTRA_DIST = \
-	module-setup.sh.in
-
-$(pkgdracut_SCRIPTS):%:%.in
-	-$(SED) -e 's,@bindir\@,$(bindir),g' \
-		-e 's,@sbindir\@,$(sbindir),g' \
-		-e 's,@datadir\@,$(datadir),g' \
-		-e 's,@dracutdir\@,$(dracutdir),g' \
-		-e 's,@udevdir\@,$(udevdir),g' \
-		-e 's,@udevruledir\@,$(udevruledir),g' \
-		-e 's,@sysconfdir\@,$(sysconfdir),g' \
-		$< >'$@'
-
-CLEANFILES = $(pkgdracut_SCRIPTS)
+SUBSTFILES += $(pkgdracut_SCRIPTS)

contrib/dracut/90zfs/Makefile.am

@@ -1,3 +1,5 @@
+include $(top_srcdir)/config/Substfiles.am
+
 pkgdracutdir = $(dracutdir)/modules.d/90zfs
 pkgdracut_SCRIPTS = \
 	export-zfs.sh \
@@ -14,27 +16,4 @@ pkgdracut_DATA = \
 	zfs-snapshot-bootfs.service \
 	zfs-rollback-bootfs.service
 
-EXTRA_DIST = \
-	export-zfs.sh.in \
-	module-setup.sh.in \
-	mount-zfs.sh.in \
-	parse-zfs.sh.in \
-	zfs-generator.sh.in \
-	zfs-load-key.sh.in \
-	zfs-needshutdown.sh.in \
-	zfs-lib.sh.in \
-	zfs-env-bootfs.service.in \
-	zfs-snapshot-bootfs.service.in \
-	zfs-rollback-bootfs.service.in
-
-$(pkgdracut_SCRIPTS) $(pkgdracut_DATA) :%:%.in
-	-$(SED) -e 's,@bindir\@,$(bindir),g' \
-		-e 's,@sbindir\@,$(sbindir),g' \
-		-e 's,@udevdir\@,$(udevdir),g' \
-		-e 's,@udevruledir\@,$(udevruledir),g' \
-		-e 's,@sysconfdir\@,$(sysconfdir),g' \
-		-e 's,@systemdunitdir\@,$(systemdunitdir),g' \
-		-e 's,@mounthelperdir\@,$(mounthelperdir),g' \
-		$< >'$@'
-
-CLEANFILES = $(pkgdracut_SCRIPTS) $(pkgdracut_DATA)
+SUBSTFILES += $(pkgdracut_SCRIPTS) $(pkgdracut_DATA)

contrib/initramfs/hooks/Makefile.am

@@ -1,20 +1,9 @@
+include $(top_srcdir)/config/Substfiles.am
+
 hooksdir = /usr/share/initramfs-tools/hooks
 
 hooks_SCRIPTS = \
 	zfs \
 	zfsunlock
 
-EXTRA_DIST = \
-	zfs.in \
-	zfsunlock.in
-
-$(hooks_SCRIPTS):%:%.in Makefile
-	-$(SED) -e 's,@sbindir\@,$(sbindir),g' \
-		-e 's,@sysconfdir\@,$(sysconfdir),g' \
-		-e 's,@udevdir\@,$(udevdir),g' \
-		-e 's,@udevruledir\@,$(udevruledir),g' \
-		-e 's,@mounthelperdir\@,$(mounthelperdir),g' \
-		-e 's,@DEFAULT_INITCONF_DIR\@,$(DEFAULT_INITCONF_DIR),g' \
-		$< >'$@'
-
-CLEANFILES = $(hooks_SCRIPTS)
+SUBSTFILES += $(hooks_SCRIPTS)

contrib/initramfs/hooks/zfs.in

@@ -12,7 +12,7 @@ COPY_EXEC_LIST="@sbindir@/zdb @sbindir@/zpool @sbindir@/zfs"
 COPY_EXEC_LIST="$COPY_EXEC_LIST @mounthelperdir@/mount.zfs @udevdir@/vdev_id"
 COPY_EXEC_LIST="$COPY_EXEC_LIST @udevdir@/zvol_id"
 COPY_FILE_LIST="/etc/hostid @sysconfdir@/zfs/zpool.cache"
-COPY_FILE_LIST="$COPY_FILE_LIST @DEFAULT_INITCONF_DIR@/zfs"
+COPY_FILE_LIST="$COPY_FILE_LIST @initconfdir@/zfs"
 COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/zfs/zfs-functions"
 COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/zfs/vdev_id.conf"
 COPY_FILE_LIST="$COPY_FILE_LIST @udevruledir@/60-zvol.rules"

etc/default/Makefile.am

@@ -1,12 +1,5 @@
-initconfdir = $(DEFAULT_INITCONF_DIR)
+include $(top_srcdir)/config/Substfiles.am
+
 initconf_SCRIPTS = zfs
 
-EXTRA_DIST = \
-	zfs.in
-
-$(initconf_SCRIPTS):%:%.in Makefile
-	  $(SED) \
-		 -e 's,@sysconfdir\@,$(sysconfdir),g' \
-		 $< >'$@'
-
-CLEANFILES = $(initconf_SCRIPTS)
+SUBSTFILES += $(initconf_SCRIPTS)

etc/init.d/Makefile.am

@@ -1,38 +1,7 @@
-initdir = $(DEFAULT_INIT_DIR)
+include $(top_srcdir)/config/Substfiles.am
+
+EXTRA_DIST += README.md
+
 init_SCRIPTS = zfs-import zfs-mount zfs-share zfs-zed
 
-initconfdir = $(DEFAULT_INITCONF_DIR)
-
-EXTRA_DIST = \
-	zfs-share.in \
-	zfs-import.in \
-	zfs-mount.in \
-	zfs-zed.in \
-	README.md
-
-$(init_SCRIPTS):%:%.in Makefile
-	-(if [ -e /etc/debian_version ]; then \
-		NFS_SRV=nfs-kernel-server; \
-	  else \
-		NFS_SRV=nfs; \
-	  fi; \
-	  if [ -e /sbin/openrc-run ]; then \
-		SHELL=/sbin/openrc-run; \
-	  else \
-		SHELL=/bin/sh; \
-	  fi; \
-	  $(SED) \
-		 -e 's,@bindir\@,$(bindir),g' \
-		 -e 's,@sbindir\@,$(sbindir),g' \
-		 -e 's,@udevdir\@,$(udevdir),g' \
-		 -e 's,@udevruledir\@,$(udevruledir),g' \
-		 -e 's,@sysconfdir\@,$(sysconfdir),g' \
-		 -e 's,@initconfdir\@,$(initconfdir),g' \
-		 -e 's,@initdir\@,$(initdir),g' \
-		 -e 's,@runstatedir\@,$(runstatedir),g' \
-		 -e "s,@SHELL\@,$$SHELL,g" \
-		 -e "s,@NFS_SRV\@,$$NFS_SRV,g" \
-		 $< >'$@'; \
-		chmod +x '$@')
-
-CLEANFILES = $(init_SCRIPTS)
+SUBSTFILES += $(init_SCRIPTS)

etc/init.d/zfs-import.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!@DEFAULT_INIT_SHELL@
 #
 # zfs-import    This script will import ZFS pools
 #

etc/init.d/zfs-mount.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!@DEFAULT_INIT_SHELL@
 #
 # zfs-mount     This script will mount/umount the zfs filesystems.
 #

etc/init.d/zfs-share.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!@DEFAULT_INIT_SHELL@
 #
 # zfs-share     This script will network share zfs filesystems and volumes.
 #
@@ -13,8 +13,8 @@
 # Required-Stop:     $local_fs $network $remote_fs zfs-mount
 # Default-Start:     2 3 4 5
 # Default-Stop:      0 1 6
-# Should-Start:      iscsi iscsitarget istgt scst @NFS_SRV@ samba samba4 zfs-mount zfs-zed
-# Should-Stop:       iscsi iscsitarget istgt scst @NFS_SRV@ samba samba4 zfs-mount zfs-zed
+# Should-Start:      iscsi iscsitarget istgt scst @DEFAULT_INIT_NFS_SERVER@ samba samba4 zfs-mount zfs-zed
+# Should-Stop:       iscsi iscsitarget istgt scst @DEFAULT_INIT_NFS_SERVER@ samba samba4 zfs-mount zfs-zed
 # Short-Description: Network share ZFS datasets and volumes.
 # Description:       Run the `zfs share -a` or `zfs unshare -a` commands
 #                    for controlling iSCSI, NFS, or CIFS network shares.

etc/init.d/zfs-zed.in

@@ -1,4 +1,4 @@
-#!@SHELL@
+#!@DEFAULT_INIT_SHELL@
 #
 # zfs-zed
 #

etc/modules-load.d/Makefile.am

@@ -1,12 +1,2 @@
-modulesload_DATA = \
+dist_modulesload_DATA = \
 	zfs.conf
-
-EXTRA_DIST = \
-	zfs.conf.in
-
-$(modulesload_DATA):%:%.in
-	-$(SED) \
-		-e '' \
-		$< >'$@'
-
-CLEANFILES = $(modulesload_DATA)

etc/systemd/system-generators/Makefile.am

@@ -1,14 +1,6 @@
+include $(top_srcdir)/config/Substfiles.am
+
 systemdgenerator_SCRIPTS = \
 	zfs-mount-generator
 
-EXTRA_DIST = \
-	zfs-mount-generator.in
-
-$(systemdgenerator_SCRIPTS): %: %.in
-	-$(SED) -e 's,@bindir\@,$(bindir),g' \
-		-e 's,@runstatedir\@,$(runstatedir),g' \
-		-e 's,@sbindir\@,$(sbindir),g' \
-		-e 's,@sysconfdir\@,$(sysconfdir),g' \
-		$< >'$@'
-
-CLEANFILES = $(systemdgenerator_SCRIPTS)
+SUBSTFILES += $(systemdgenerator_SCRIPTS)

etc/systemd/system/Makefile.am

@@ -1,3 +1,5 @@
+include $(top_srcdir)/config/Substfiles.am
+
 systemdpreset_DATA = \
 	50-zfs.preset
 
@@ -12,27 +14,8 @@ systemdunit_DATA = \
 	zfs-volumes.target \
 	zfs.target
 
-EXTRA_DIST = \
-	zfs-zed.service.in \
-	zfs-import-cache.service.in \
-	zfs-import-scan.service.in \
-	zfs-mount.service.in \
-	zfs-share.service.in \
-	zfs-import.target.in \
-	zfs-volume-wait.service.in \
-	zfs-volumes.target.in \
-	zfs.target.in \
-	50-zfs.preset.in
-
-$(systemdunit_DATA) $(systemdpreset_DATA):%:%.in
-	-$(SED) -e 's,@bindir\@,$(bindir),g' \
-		-e 's,@runstatedir\@,$(runstatedir),g' \
-		-e 's,@sbindir\@,$(sbindir),g' \
-		-e 's,@sysconfdir\@,$(sysconfdir),g' \
-		$< >'$@'
+SUBSTFILES += $(systemdpreset_DATA) $(systemdunit_DATA)
 
 install-data-hook:
 	$(MKDIR_P) "$(DESTDIR)$(systemdunitdir)"
 	ln -sf /dev/null "$(DESTDIR)$(systemdunitdir)/zfs-import.service"
-
-CLEANFILES = $(systemdunit_DATA) $(systemdpreset_DATA)

etc/zfs/Makefile.am

@@ -1,5 +1,6 @@
+include $(top_srcdir)/config/Substfiles.am
+
 pkgsysconfdir = $(sysconfdir)/zfs
-initconfdir = $(DEFAULT_INITCONF_DIR)
 
 dist_pkgsysconf_DATA = \
 	vdev_id.conf.alias.example \
@@ -7,16 +8,8 @@ dist_pkgsysconf_DATA = \
 	vdev_id.conf.sas_switch.example \
 	vdev_id.conf.multipath.example \
 	vdev_id.conf.scsi.example
+
 pkgsysconf_SCRIPTS = \
 	zfs-functions
 
-EXTRA_DIST = zfs-functions.in
-
-$(pkgsysconf_SCRIPTS):%:%.in Makefile
-	  -$(SED) \
-		 -e 's,@sbindir\@,$(sbindir),g' \
-		 -e 's,@sysconfdir\@,$(sysconfdir),g' \
-		 -e 's,@initconfdir\@,$(initconfdir),g' \
-		 $< >'$@'
-
-CLEANFILES = $(pkgsysconf_SCRIPTS)
+SUBSTFILES += $(pkgsysconf_SCRIPTS)

man/man8/Makefile.am

@@ -1,3 +1,5 @@
+include $(top_srcdir)/config/Substfiles.am
+
 dist_man_MANS = \
 	fsck.zfs.8 \
 	mount.zfs.8 \
@@ -86,16 +88,4 @@ nodist_man_MANS = \
 	zed.8 \
 	zfs-mount-generator.8
 
-EXTRA_DIST = \
-	zed.8.in \
-	zfs-mount-generator.8.in
-
-$(nodist_man_MANS): %: %.in
-	-$(SED) -e 's,@zfsexecdir\@,$(zfsexecdir),g' \
-		-e 's,@systemdgeneratordir\@,$(systemdgeneratordir),g' \
-		-e 's,@runstatedir\@,$(runstatedir),g' \
-		-e 's,@sysconfdir\@,$(sysconfdir),g' \
-		$< >'$@'
-
-CLEANFILES = \
-	$(nodist_man_MANS)
+SUBSTFILES += $(nodist_man_MANS)

scripts/zfs-tests.sh

@@ -301,10 +301,6 @@ constrain_path() {
 	elif [ "$UNAME" = "FreeBSD" ] ; then
 		ln -fs /usr/local/bin/ksh93 "$STF_PATH/ksh"
 	fi
-
-	if [ -L "$STF_PATH/arc_summary3" ]; then
-		ln -fs "$STF_PATH/arc_summary3" "$STF_PATH/arc_summary"
-	fi
 }
 
 #

tests/test-runner/bin/.gitignore

@@ -0,0 +1,2 @@
+test-runner.py
+zts-report.py

tests/test-runner/bin/Makefile.am

@@ -1,15 +1,8 @@
+include $(top_srcdir)/config/Substfiles.am
+
 pkgdatadir = $(datadir)/@PACKAGE@/test-runner/bin
-dist_pkgdata_SCRIPTS = \
+pkgdata_SCRIPTS = \
 	test-runner.py \
 	zts-report.py
-#
-# These scripts are compatible with both Python 2.6 and 3.4.  As such the
-# python 3 shebang can be replaced at install time when targeting a python
-# 2 system.  This allows us to maintain a single version of the source.
-#
-if USING_PYTHON_2
-install-data-hook:
-	$(SED) ${ac_inplace} -e 's|^#!/usr/bin/env python3|#!/usr/bin/env python2|' \
-	    $(DESTDIR)$(pkgdatadir)/test-runner.py \
-	    $(DESTDIR)$(pkgdatadir)/zts-report.py
-endif
+
+SUBSTFILES += $(pkgdata_SCRIPTS)

tests/test-runner/bin/test-runner.py.in

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env @PYTHON_SHEBANG@
 
 #
 # This file and its contents are supplied under the terms of the

tests/test-runner/bin/zts-report.py.in

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env @PYTHON_SHEBANG@
 
 #
 # This file and its contents are supplied under the terms of the
@@ -205,7 +205,6 @@ maybe = {
     'cli_root/zpool_import/zpool_import_missing_003_pos': ['SKIP', '6839'],
     'cli_root/zpool_trim/setup': ['SKIP', trim_reason],
     'cli_root/zpool_upgrade/zpool_upgrade_004_pos': ['FAIL', '6141'],
-    'cli_user/misc/arc_summary3_001_pos': ['SKIP', python_reason],
     'delegate/setup': ['SKIP', exec_reason],
     'history/history_004_pos': ['FAIL', '7026'],
     'history/history_005_neg': ['FAIL', '6680'],

tests/zfs-tests/include/Makefile.am

@@ -1,3 +1,5 @@
+include $(top_srcdir)/config/Substfiles.am
+
 pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/include
 dist_pkgdata_DATA = \
 	blkdev.shlib \
@@ -8,13 +10,5 @@ dist_pkgdata_DATA = \
 	tunables.cfg \
 	zpool_script.shlib
 
-EXTRA_DIST = default.cfg.in
-
 nodist_pkgdata_DATA = default.cfg
-
-$(nodist_pkgdata_DATA): %: %.in
-	-$(SED) -e 's,@zfsexecdir\@,$(zfsexecdir),g' \
-		-e 's,@sysconfdir\@,$(sysconfdir),g' \
-		$< >'$@'
-
-CLEANFILES = default.cfg
+SUBSTFILES += $(nodist_pkgdata_DATA)

tests/zfs-tests/include/commands.cfg

@@ -178,7 +178,6 @@ export ZFS_FILES='zdb
     ztest
     raidz_test
     arc_summary
-    arc_summary3
     arcstat
     dbufstat
     zed

tests/zfs-tests/tests/functional/pyzfs/Makefile.am

@@ -1,17 +1,7 @@
+include $(top_srcdir)/config/Substfiles.am
+
 pkgpyzfsdir = $(datadir)/@PACKAGE@/zfs-tests/tests/functional/pyzfs
 pkgpyzfs_SCRIPTS = \
 	pyzfs_unittest.ksh
 
-EXTRA_DIST = \
-	pyzfs_unittest.ksh.in
-
-#
-# The pyzfs module is built either for Python 2 or Python 3.  In order
-# to properly test it the unit tests must be updated to the matching version.
-#
-$(pkgpyzfs_SCRIPTS):%:%.in
-	-$(SED) -e 's,@PYTHON\@,$(PYTHON),g' \
-		$< >'$@'
-	-chmod 775 $@
-
-CLEANFILES = $(pkgpyzfs_SCRIPTS)
+SUBSTFILES += $(pkgpyzfs_SCRIPTS)

udev/rules.d/Makefile.am

@@ -1,19 +1,8 @@
+include $(top_srcdir)/config/Substfiles.am
+
 udevrule_DATA = \
 	69-vdev.rules \
 	60-zvol.rules \
 	90-zfs.rules
 
-EXTRA_DIST = \
-	69-vdev.rules.in \
-	60-zvol.rules.in \
-	90-zfs.rules.in
-
-$(udevrule_DATA):%:%.in
-	-$(SED) -e 's,@bindir\@,$(bindir),g' \
-		-e 's,@sbindir\@,$(sbindir),g' \
-		-e 's,@udevdir\@,$(udevdir),g' \
-		-e 's,@udevruledir\@,$(udevruledir),g' \
-		-e 's,@sysconfdir\@,$(sysconfdir),g' \
-		$< > '$@'
-
-CLEANFILES = $(udevrule_DATA)
+SUBSTFILES += $(udevrule_DATA)