From 6ca376775ecae19df72324bb8212e70467795450 Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@nicira.com>
Date: Wed, 26 Oct 2011 16:06:37 -0700
Subject: [PATCH] Implement automatic dependency generation for manpages.

This ensures that manpages actually get rebuilt if any of the lib/*.man
fragments that they depend upon are modified.
---
 Makefile.am                    |  16 ++-
 build-aux/sodepends.pl         |  70 ++++++++++
 manpages.mk                    | 231 +++++++++++++++++++++++++++++++++
 ovsdb/automake.mk              |  11 +-
 ovsdb/ovsdbmonitor/automake.mk |   4 +-
 utilities/automake.mk          |  20 +--
 utilities/bugtool/automake.mk  |   1 +
 vswitchd/automake.mk           |   7 +-
 8 files changed, 338 insertions(+), 22 deletions(-)
 create mode 100644 build-aux/sodepends.pl
 create mode 100644 manpages.mk

diff --git a/Makefile.am b/Makefile.am
index 0e2c6d79..d7144282 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -46,8 +46,10 @@ EXTRA_DIST = \
 	SubmittingPatches \
 	WHY-OVS \
 	boot.sh \
+	build-aux/sodepends.pl \
 	build-aux/soexpand.pl \
-	$(MAN_FRAGMENTS)
+	$(MAN_FRAGMENTS) \
+	$(MAN_ROOTS)
 bin_PROGRAMS =
 sbin_PROGRAMS =
 bin_SCRIPTS =
@@ -61,6 +63,7 @@ INSTALL_DATA_LOCAL =
 UNINSTALL_LOCAL =
 man_MANS =
 MAN_FRAGMENTS =
+MAN_ROOTS =
 noinst_DATA =
 noinst_HEADERS =
 noinst_LIBRARIES =
@@ -160,6 +163,17 @@ manpage-check: $(MANS) $(MAN_FRAGMENTS)
 CLEANFILES += manpage-check
 endif
 
+include $(srcdir)/manpages.mk
+$(srcdir)/manpages.mk: $(MAN_ROOTS) build-aux/sodepends.pl
+	@$(PERL) $(srcdir)/build-aux/sodepends.pl -I. -I$(srcdir) $(MAN_ROOTS) >$(@F).tmp
+	@if cmp -s $(@F).tmp $@; then \
+		touch $@; \
+		rm -f $(@F).tmp; \
+	else \
+		mv $(@F).tmp $@; \
+	fi
+CLEANFILES += manpage-dep-check
+
 dist-hook: $(DIST_HOOKS)
 all-local: $(ALL_LOCAL)
 clean-local: $(CLEAN_LOCAL)
diff --git a/build-aux/sodepends.pl b/build-aux/sodepends.pl
new file mode 100644
index 00000000..3cc4c2eb
--- /dev/null
+++ b/build-aux/sodepends.pl
@@ -0,0 +1,70 @@
+# Copyright (c) 2008, 2011 Nicira Networks.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+use strict;
+use warnings;
+use Getopt::Long;
+
+our ($exit_code) = 0;
+
+our (@include_dirs);
+Getopt::Long::Configure ("bundling");
+GetOptions("I|include=s" => \@include_dirs) or exit(1);
+@include_dirs = ('.') if !@include_dirs;
+
+sub find_file {
+    my ($name) = @_;
+    foreach my $dir (@include_dirs, '.') {
+        my $file = "$dir/$name";
+        if (stat($file)) {
+            return $file;
+        }
+    }
+    print STDERR "$name not found in: ", join(' ', @include_dirs), "\n";
+    $exit_code = 1;
+    return;
+}
+
+print "# Generated automatically -- do not modify!    -*- buffer-read-only: t -*-\n";
+for my $toplevel (sort(@ARGV)) {
+    # Skip names that don't end in .in.
+    next if $toplevel !~ /\.in$/;
+
+    # Open file.
+    my ($fn) = find_file($toplevel);
+    next if !defined($fn);
+    if (!open(OUTER, '<', $fn)) {
+        print "$fn: open: $!\n";
+        $exit_code = 1;
+        next;
+    }
+
+    my (@dependencies);
+  OUTER:
+    while (<OUTER>) {
+        if (my ($name) = /^\.so (\S+)$/) {
+            push(@dependencies, $name) if find_file($name);
+        }
+    }
+    close(OUTER);
+
+    my ($output) = $toplevel;
+    $output =~ s/\.in//;
+
+    print "\n$output:";
+    print " \\\n\t$_" foreach $toplevel, sort(@dependencies);
+    print "\n";
+    print "$_:\n" foreach $toplevel, sort(@dependencies);
+}
+exit $exit_code;
diff --git a/manpages.mk b/manpages.mk
new file mode 100644
index 00000000..8135a2c8
--- /dev/null
+++ b/manpages.mk
@@ -0,0 +1,231 @@
+# Generated automatically -- do not modify!    -*- buffer-read-only: t -*-
+
+ovsdb/ovsdb-client.1: \
+	ovsdb/ovsdb-client.1.in \
+	lib/common-syn.man \
+	lib/common.man \
+	lib/daemon-syn.man \
+	lib/daemon.man \
+	lib/ssl-bootstrap-syn.man \
+	lib/ssl-bootstrap.man \
+	lib/ssl-syn.man \
+	lib/ssl.man \
+	lib/table.man \
+	lib/vlog-syn.man \
+	lib/vlog.man \
+	ovsdb/remote-active.man \
+	ovsdb/remote-passive.man
+ovsdb/ovsdb-client.1.in:
+lib/common-syn.man:
+lib/common.man:
+lib/daemon-syn.man:
+lib/daemon.man:
+lib/ssl-bootstrap-syn.man:
+lib/ssl-bootstrap.man:
+lib/ssl-syn.man:
+lib/ssl.man:
+lib/table.man:
+lib/vlog-syn.man:
+lib/vlog.man:
+ovsdb/remote-active.man:
+ovsdb/remote-passive.man:
+
+ovsdb/ovsdb-server.1: \
+	ovsdb/ovsdb-server.1.in \
+	lib/common-syn.man \
+	lib/common.man \
+	lib/daemon-syn.man \
+	lib/daemon.man \
+	lib/ssl-bootstrap-syn.man \
+	lib/ssl-bootstrap.man \
+	lib/ssl-syn.man \
+	lib/ssl.man \
+	lib/stress-unixctl.man \
+	lib/unixctl-syn.man \
+	lib/unixctl.man \
+	lib/vlog-syn.man \
+	lib/vlog-unixctl.man \
+	lib/vlog.man \
+	ovsdb/remote-active.man \
+	ovsdb/remote-passive.man
+ovsdb/ovsdb-server.1.in:
+lib/common-syn.man:
+lib/common.man:
+lib/daemon-syn.man:
+lib/daemon.man:
+lib/ssl-bootstrap-syn.man:
+lib/ssl-bootstrap.man:
+lib/ssl-syn.man:
+lib/ssl.man:
+lib/stress-unixctl.man:
+lib/unixctl-syn.man:
+lib/unixctl.man:
+lib/vlog-syn.man:
+lib/vlog-unixctl.man:
+lib/vlog.man:
+ovsdb/remote-active.man:
+ovsdb/remote-passive.man:
+
+ovsdb/ovsdb-tool.1: \
+	ovsdb/ovsdb-tool.1.in \
+	lib/common-syn.man \
+	lib/common.man \
+	lib/vlog-syn.man \
+	lib/vlog.man
+ovsdb/ovsdb-tool.1.in:
+lib/common-syn.man:
+lib/common.man:
+lib/vlog-syn.man:
+lib/vlog.man:
+
+utilities/ovs-appctl.8: \
+	utilities/ovs-appctl.8.in \
+	lib/common.man
+utilities/ovs-appctl.8.in:
+lib/common.man:
+
+utilities/ovs-benchmark.1: \
+	utilities/ovs-benchmark.1.in
+utilities/ovs-benchmark.1.in:
+
+utilities/ovs-controller.8: \
+	utilities/ovs-controller.8.in \
+	lib/common.man \
+	lib/daemon.man \
+	lib/ssl-peer-ca-cert.man \
+	lib/ssl.man \
+	lib/unixctl.man \
+	lib/vconn-active.man \
+	lib/vconn-passive.man \
+	lib/vlog.man
+utilities/ovs-controller.8.in:
+lib/common.man:
+lib/daemon.man:
+lib/ssl-peer-ca-cert.man:
+lib/ssl.man:
+lib/unixctl.man:
+lib/vconn-active.man:
+lib/vconn-passive.man:
+lib/vlog.man:
+
+utilities/ovs-dpctl.8: \
+	utilities/ovs-dpctl.8.in \
+	lib/common.man \
+	lib/vlog.man
+utilities/ovs-dpctl.8.in:
+lib/common.man:
+lib/vlog.man:
+
+utilities/ovs-ofctl.8: \
+	utilities/ovs-ofctl.8.in \
+	lib/common.man \
+	lib/ssl.man \
+	lib/vconn-active.man \
+	lib/vlog.man
+utilities/ovs-ofctl.8.in:
+lib/common.man:
+lib/ssl.man:
+lib/vconn-active.man:
+lib/vlog.man:
+
+utilities/ovs-pcap.1: \
+	utilities/ovs-pcap.1.in \
+	lib/common-syn.man \
+	lib/common.man
+utilities/ovs-pcap.1.in:
+lib/common-syn.man:
+lib/common.man:
+
+utilities/ovs-pki.8: \
+	utilities/ovs-pki.8.in
+utilities/ovs-pki.8.in:
+
+utilities/ovs-tcpundump.1: \
+	utilities/ovs-tcpundump.1.in \
+	lib/common-syn.man \
+	lib/common.man
+utilities/ovs-tcpundump.1.in:
+lib/common-syn.man:
+lib/common.man:
+
+utilities/ovs-vlan-bug-workaround.8: \
+	utilities/ovs-vlan-bug-workaround.8.in \
+	lib/common.man \
+	utilities/ovs-vlan-bugs.man
+utilities/ovs-vlan-bug-workaround.8.in:
+lib/common.man:
+utilities/ovs-vlan-bugs.man:
+
+utilities/ovs-vlan-test.8: \
+	utilities/ovs-vlan-test.8.in \
+	lib/common-syn.man \
+	lib/common.man \
+	utilities/ovs-vlan-bugs.man
+utilities/ovs-vlan-test.8.in:
+lib/common-syn.man:
+lib/common.man:
+utilities/ovs-vlan-bugs.man:
+
+utilities/ovs-vsctl.8: \
+	utilities/ovs-vsctl.8.in \
+	lib/ssl-bootstrap.man \
+	lib/ssl-peer-ca-cert.man \
+	lib/ssl.man \
+	lib/table.man \
+	lib/vconn-active.man \
+	lib/vconn-passive.man \
+	lib/vlog.man \
+	ovsdb/remote-active.man \
+	ovsdb/remote-active.man \
+	ovsdb/remote-passive.man \
+	ovsdb/remote-passive.man
+utilities/ovs-vsctl.8.in:
+lib/ssl-bootstrap.man:
+lib/ssl-peer-ca-cert.man:
+lib/ssl.man:
+lib/table.man:
+lib/vconn-active.man:
+lib/vconn-passive.man:
+lib/vlog.man:
+ovsdb/remote-active.man:
+ovsdb/remote-active.man:
+ovsdb/remote-passive.man:
+ovsdb/remote-passive.man:
+
+vswitchd/ovs-brcompatd.8: \
+	vswitchd/ovs-brcompatd.8.in \
+	lib/common.man \
+	lib/daemon.man \
+	lib/leak-checker.man \
+	lib/vlog.man
+vswitchd/ovs-brcompatd.8.in:
+lib/common.man:
+lib/daemon.man:
+lib/leak-checker.man:
+lib/vlog.man:
+
+vswitchd/ovs-vswitchd.8: \
+	vswitchd/ovs-vswitchd.8.in \
+	lib/common.man \
+	lib/daemon.man \
+	lib/leak-checker.man \
+	lib/ssl-bootstrap.man \
+	lib/ssl.man \
+	lib/stress-unixctl.man \
+	lib/vlog-unixctl.man \
+	lib/vlog.man \
+	ofproto/ofproto-unixctl.man \
+	ovsdb/remote-active.man \
+	ovsdb/remote-passive.man
+vswitchd/ovs-vswitchd.8.in:
+lib/common.man:
+lib/daemon.man:
+lib/leak-checker.man:
+lib/ssl-bootstrap.man:
+lib/ssl.man:
+lib/stress-unixctl.man:
+lib/vlog-unixctl.man:
+lib/vlog.man:
+ofproto/ofproto-unixctl.man:
+ovsdb/remote-active.man:
+ovsdb/remote-passive.man:
diff --git a/ovsdb/automake.mk b/ovsdb/automake.mk
index b0ee8c9d..3840ffce 100644
--- a/ovsdb/automake.mk
+++ b/ovsdb/automake.mk
@@ -40,7 +40,7 @@ ovsdb_ovsdb_tool_LDADD = ovsdb/libovsdb.a lib/libopenvswitch.a
 # ovsdb-tool.1
 man_MANS += ovsdb/ovsdb-tool.1
 DISTCLEANFILES += ovsdb/ovsdb-tool.1
-EXTRA_DIST += ovsdb/ovsdb-tool.1.in
+MAN_ROOTS += ovsdb/ovsdb-tool.1.in
 
 # ovsdb-client
 bin_PROGRAMS += ovsdb/ovsdb-client
@@ -49,7 +49,7 @@ ovsdb_ovsdb_client_LDADD = ovsdb/libovsdb.a lib/libopenvswitch.a $(SSL_LIBS)
 # ovsdb-client.1
 man_MANS += ovsdb/ovsdb-client.1
 DISTCLEANFILES += ovsdb/ovsdb-client.1
-EXTRA_DIST += ovsdb/ovsdb-client.1.in
+MAN_ROOTS += ovsdb/ovsdb-client.1.in
 
 # ovsdb-server
 sbin_PROGRAMS += ovsdb/ovsdb-server
@@ -58,14 +58,13 @@ ovsdb_ovsdb_server_LDADD = ovsdb/libovsdb.a lib/libopenvswitch.a $(SSL_LIBS)
 # ovsdb-server.1
 man_MANS += ovsdb/ovsdb-server.1
 DISTCLEANFILES += ovsdb/ovsdb-server.1
-EXTRA_DIST += ovsdb/ovsdb-server.1.in
+MAN_ROOTS += ovsdb/ovsdb-server.1.in
 
 # ovsdb-idlc
 EXTRA_DIST += ovsdb/SPECS
 noinst_SCRIPTS += ovsdb/ovsdb-idlc
-EXTRA_DIST += \
-	ovsdb/ovsdb-idlc.in \
-	ovsdb/ovsdb-idlc.1
+EXTRA_DIST += ovsdb/ovsdb-idlc.in
+MAN_ROOTS += ovsdb/ovsdb-idlc.1
 DISTCLEANFILES += ovsdb/ovsdb-idlc
 SUFFIXES += .ovsidl .ovsschema
 OVSDB_IDLC = $(run_python) $(srcdir)/ovsdb/ovsdb-idlc.in
diff --git a/ovsdb/ovsdbmonitor/automake.mk b/ovsdb/ovsdbmonitor/automake.mk
index 7e832ef3..59d2e2c7 100644
--- a/ovsdb/ovsdbmonitor/automake.mk
+++ b/ovsdb/ovsdbmonitor/automake.mk
@@ -25,8 +25,8 @@ EXTRA_DIST += \
 	ovsdb/ovsdbmonitor/HostWindow.ui \
 	ovsdb/ovsdbmonitor/LogWindow.ui \
 	ovsdb/ovsdbmonitor/MainWindow.ui \
-	ovsdb/ovsdbmonitor/ovsdbmonitor.in \
-	ovsdb/ovsdbmonitor/ovsdbmonitor.1
+	ovsdb/ovsdbmonitor/ovsdbmonitor.in
+MAN_ROOTS += ovsdb/ovsdbmonitor/ovsdbmonitor.1
 
 ovsdbmonitordir = ${pkgdatadir}/ovsdbmonitor
 if BUILD_OVSDBMONITOR
diff --git a/utilities/automake.mk b/utilities/automake.mk
index 2cfdf8e3..420d5fc3 100644
--- a/utilities/automake.mk
+++ b/utilities/automake.mk
@@ -15,24 +15,26 @@ noinst_SCRIPTS += utilities/ovs-pki-cgi
 scripts_SCRIPTS += utilities/ovs-ctl utilities/ovs-lib.sh utilities/ovs-save
 
 EXTRA_DIST += \
+	utilities/ovs-ctl.in \
+	utilities/ovs-lib.sh.in \
+	utilities/ovs-parse-leaks.in \
+	utilities/ovs-pcap.in \
+	utilities/ovs-pki-cgi.in \
+	utilities/ovs-pki.in \
+	utilities/ovs-save \
+	utilities/ovs-tcpundump.in \
+	utilities/ovs-vlan-test.in
+MAN_ROOTS += \
 	utilities/ovs-appctl.8.in \
 	utilities/ovs-benchmark.1.in \
 	utilities/ovs-controller.8.in \
-	utilities/ovs-ctl.in \
+	utilities/ovs-ctl.8 \
 	utilities/ovs-dpctl.8.in \
-	utilities/ovs-lib.sh.in \
 	utilities/ovs-ofctl.8.in \
 	utilities/ovs-parse-leaks.8 \
-	utilities/ovs-parse-leaks.in \
 	utilities/ovs-pcap.1.in \
-	utilities/ovs-pcap.in \
-	utilities/ovs-pki-cgi.in \
 	utilities/ovs-pki.8.in \
-	utilities/ovs-pki.in \
-	utilities/ovs-save \
 	utilities/ovs-tcpundump.1.in \
-	utilities/ovs-tcpundump.in \
-	utilities/ovs-vlan-test.in \
 	utilities/ovs-vlan-bug-workaround.8.in \
 	utilities/ovs-vlan-test.8.in \
 	utilities/ovs-vsctl.8.in
diff --git a/utilities/bugtool/automake.mk b/utilities/bugtool/automake.mk
index 5b4a12fe..63762f13 100644
--- a/utilities/bugtool/automake.mk
+++ b/utilities/bugtool/automake.mk
@@ -2,6 +2,7 @@ if HAVE_PYTHON
 sbin_SCRIPTS += utilities/bugtool/ovs-bugtool
 CLEANFILES += utilities/bugtool/ovs-bugtool
 man_MANS += utilities/bugtool/ovs-bugtool.8
+MAN_ROOTS += utilities/bugtool/ovs-bugtool.8
 
 bugtool_plugins = \
 	utilities/bugtool/plugins/kernel-info/openvswitch.xml \
diff --git a/vswitchd/automake.mk b/vswitchd/automake.mk
index 1df5dff7..804cf58b 100644
--- a/vswitchd/automake.mk
+++ b/vswitchd/automake.mk
@@ -21,9 +21,8 @@ vswitchd_ovs_vswitchd_LDADD = \
 	lib/libsflow.a \
 	lib/libopenvswitch.a \
 	$(SSL_LIBS)
-EXTRA_DIST += \
-	vswitchd/ovs-vswitchd.8.in \
-	vswitchd/INTERNALS
+EXTRA_DIST += vswitchd/INTERNALS
+MAN_ROOTS += vswitchd/ovs-vswitchd.8.in
 
 if HAVE_NETLINK
 sbin_PROGRAMS += vswitchd/ovs-brcompatd
@@ -33,7 +32,7 @@ vswitchd_ovs_brcompatd_SOURCES = \
 	vswitchd/vswitch-idl.h
 vswitchd_ovs_brcompatd_LDADD = lib/libopenvswitch.a $(SSL_LIBS)
 endif
-EXTRA_DIST += vswitchd/ovs-brcompatd.8.in
+MAN_ROOTS += vswitchd/ovs-brcompatd.8.in
 
 # vswitch schema and IDL
 OVSIDL_BUILT += \
-- 
2.30.2