The previous workflow is to convert dot diagrams into .pic format and
embed into manpages; double borders and arrows were not used in dot but
introduced in .pic conversion; edge routing in .pic was also worse than
dot.

The updated workflow specifies directly in dot diagram double
boarders for "root set" nodes and solid/bold styles and arrows for
edges. The converted .eps diagram has improved routing. The .eps diagram
is embedded into PDF using groff PSPIC marco package when converting the
manpages.  PSPIC package is automatically loaded by groff when output to
PS/PDF.

In addition, 'constraint=false' option is removed from weak
references to allow positioning of node boxes to avoid overlapping
between multiple edges between "Mirror" and "Port" in
ovs-vswitchd.conf.db.

Signed-off-by: Shu Shen <shu.s...@radisys.com>
---

    
Changes made in V3:
  - .eps files are no longer added to manpages (man_MANS). They are listed as
    dependancy for make dist-docs target only and passed as enviroment variable
    MAN_DEPS to the script dist-docs. The files will be copied by script 
dist-docs
    into $abs_distdir for generating PDF only.
    
Changes made in V2:
  - Filter out .eps files from manpages when make manpage-check target This
    prevents manpage-check to perform checks on .eps files


 Makefile.am          |  5 ++--
 build-aux/dist-docs  |  8 +++++-
 ovsdb/automake.mk    |  2 +-
 ovsdb/dot2pic        | 80 ----------------------------------------------------
 ovsdb/ovsdb-doc      |  5 +---
 ovsdb/ovsdb-dot.in   |  7 +++--
 vswitchd/automake.mk | 20 +++++++------
 vtep/automake.mk     | 20 +++++++------
 8 files changed, 40 insertions(+), 107 deletions(-)
 delete mode 100755 ovsdb/dot2pic

diff --git a/Makefile.am b/Makefile.am
index 3e5e0b2..5fdd6ec 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -119,6 +119,7 @@ dist_scripts_DATA =
 INSTALL_DATA_LOCAL =
 UNINSTALL_LOCAL =
 man_MANS =
+man_DEPS =
 MAN_FRAGMENTS =
 MAN_ROOTS =
 noinst_DATA =
@@ -346,8 +347,8 @@ if LINUX_ENABLED
        cd datapath/linux && $(MAKE) modules_install
 endif
 
-dist-docs:
-       VERSION=$(VERSION) $(srcdir)/build-aux/dist-docs $(srcdir) $(docs)
+dist-docs: $(man_DEPS)
+       VERSION=$(VERSION) MAN_DEPS="$(man_DEPS)" $(srcdir)/build-aux/dist-docs 
$(srcdir) $(docs)
 .PHONY: dist-docs
 
 include m4/automake.mk
diff --git a/build-aux/dist-docs b/build-aux/dist-docs
index 5857c1c..2b31fac 100755
--- a/build-aux/dist-docs
+++ b/build-aux/dist-docs
@@ -48,6 +48,12 @@ make install-man mandir="$abs_distdir"/man
 (cd $distdir && mv `find man -type f` . && rm -rf man)
 manpages=`cd $distdir && echo *`
 
+# Install manpage dependencies
+for mandep in $MAN_DEPS; do
+    cp "$mandep" "$abs_distdir"
+done
+
+
 # Start writing index.html.
 exec 3>$distdir/index.html
 cat >&3 <<EOF
@@ -102,7 +108,7 @@ EOF
 # cause the groff HTML output engine to segfault (!).
 (cd $distdir
  for manpage in $manpages; do
-     man -l -Tps $manpage | ps2pdf - > $manpage.pdf
+     groff -man -Tps $manpage | ps2pdf - > $manpage.pdf
      man -l -Tutf8 $manpage | sed 's/.//g' > $manpage.txt
      (echo '<html><head><meta charset="UTF-8"></head><body><pre>'
       man -l -Tutf8 $manpage | sed '
diff --git a/ovsdb/automake.mk b/ovsdb/automake.mk
index a66974a..0c3a94c 100644
--- a/ovsdb/automake.mk
+++ b/ovsdb/automake.mk
@@ -99,7 +99,7 @@ EXTRA_DIST += ovsdb/ovsdb-doc
 OVSDB_DOC = $(run_python) $(srcdir)/ovsdb/ovsdb-doc
 
 # ovsdb-dot
-EXTRA_DIST += ovsdb/ovsdb-dot.in ovsdb/dot2pic
+EXTRA_DIST += ovsdb/ovsdb-dot.in
 noinst_SCRIPTS += ovsdb/ovsdb-dot
 DISTCLEANFILES += ovsdb/ovsdb-dot
 OVSDB_DOT = $(run_python) $(srcdir)/ovsdb/ovsdb-dot.in
diff --git a/ovsdb/dot2pic b/ovsdb/dot2pic
deleted file mode 100755
index d682be5..0000000
--- a/ovsdb/dot2pic
+++ /dev/null
@@ -1,80 +0,0 @@
-#! /usr/bin/perl
-
-# Copyright (c) 2009, 2010, 2011, 2013 Nicira, Inc.
-#
-# 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;
-
-my $font_scale = 0;
-GetOptions("f=i" => \$font_scale) || exit 1;
-
-my ($scale) = 1;
-printf ".ps %+d\n", -$font_scale if $font_scale;
-print ".PS\n";
-print "linethick = 1;\n";
-while (<>) {
-    if (/^graph/) {
-        (undef, $scale) = split;
-    } elsif (/^node/) {
-        my (undef, $name, $x, $y, $width, $height, $label, $style, $shape, 
$color, $fillcolor) = split;
-        $x *= $scale;
-        $y *= $scale;
-        $width *= $scale;
-        $height *= $scale;
-        print "linethick = ", ($style eq 'bold' ? 0.5 : 1.0), ";\n";
-        print "box at $x,$y wid $width height $height \"$name\"\n";
-        if ($style eq 'bold') {
-            my $inset = 2.0 / 72.0;
-            $width -= $inset * 2;
-            $height -= $inset * 2;
-            print "box at $x,$y wid $width height $height\n";
-        }
-    } elsif (/edge/) {
-        my (undef, $tail, $head, $n, $rest) = split(' ', $_, 5);
-        my @xy;
-        for (1...$n) {
-            my ($x, $y);
-            ($x, $y, $rest) = split(' ', $rest, 3);
-            push(@xy, [$x * $scale, $y * $scale]);
-        }
-        my ($label, $xl, $yl);
-        if (scalar(my @junk = split(' ', $rest)) > 2) {
-            if ($rest =~ s/^"([^"]*)"\s+//) {
-                $label = $1;
-            } else {
-                ($label, $rest) = split(' ', $rest, 2);
-            }
-            ($xl, $yl, $rest) = split(' ', $rest, 3);
-            $xl *= $scale;
-            $yl *= $scale;
-        }
-        my ($style, $color) = split(' ', $rest);
-
-        print "linethick = ", ($style eq 'dotted' ? 0.5 : 1), ";\n";
-
-        print "spline -> from $xy[0][0],$xy[0][1]";
-        for (my ($i) = 0; $i <= $#xy; $i++) {
-            print " to $xy[$i][0],$xy[$i][1]";
-        }
-        print "\n";
-
-        print "\"$label\" at $xl,$yl\n" if defined($label);
-    }
-
-}
-printf ".ps %+d\n", $font_scale if $font_scale;
-print ".PE\n";
diff --git a/ovsdb/ovsdb-doc b/ovsdb/ovsdb-doc
index 6200915..08d22d7 100755
--- a/ovsdb/ovsdb-doc
+++ b/ovsdb/ovsdb-doc
@@ -341,10 +341,7 @@ constraint on the number of allowed values: \\fB?\\fR for 
zero or one,
 represent strong references; thin lines represent weak references.
 .RS -1in
 """
-        erStream = open(erFile, "r")
-        for line in erStream:
-            s += line + '\n'
-        erStream.close()
+       s += ".PSPIC "+erFile+"\n"
         s += ".RE\\}\n"
 
     for node in tableNodes:
diff --git a/ovsdb/ovsdb-dot.in b/ovsdb/ovsdb-dot.in
index 006d7ed..ffbe121 100755
--- a/ovsdb/ovsdb-dot.in
+++ b/ovsdb/ovsdb-dot.in
@@ -30,8 +30,9 @@ def printEdge(tableName, type, baseType, label):
         options = {}
         options['label'] = '"%s%s"' % (label, arity)
         if baseType.ref_type == 'weak':
-            options['constraint'] = 'false'
-            options['style'] = 'dotted'
+            options['style'] = 'solid'
+       else:
+           options['style'] = 'bold'
         print "\t%s -> %s [%s];" % (
             tableName,
             baseType.ref_table_name,
@@ -50,7 +51,7 @@ def schemaToDot(schemaFile, arrows):
     for tableName, table in schema.tables.iteritems():
         options = {}
         if table.is_root:
-            options['style'] = 'bold'
+            options['peripheries'] = '2'
         print "\t%s [%s];" % (
             tableName,
             ', '.join(['%s=%s' % (k,v) for k,v in options.items()]))
diff --git a/vswitchd/automake.mk b/vswitchd/automake.mk
index 80affe9..d5d57e1 100644
--- a/vswitchd/automake.mk
+++ b/vswitchd/automake.mk
@@ -25,18 +25,22 @@ pkgdata_DATA += vswitchd/vswitch.ovsschema
 
 # vswitch E-R diagram
 #
-# If "python" or "dot" is not available, then we do not add graphical diagram
-# to the documentation.
+# If "python" or "dot" or "groff" is not available, then we do not add
+# graphical diagram to the documentation.
 if HAVE_PYTHON
 if HAVE_DOT
+if HAVE_GROFF
 vswitchd/vswitch.gv: ovsdb/ovsdb-dot.in vswitchd/vswitch.ovsschema
-       $(AM_V_GEN)$(OVSDB_DOT) --no-arrows 
$(srcdir)/vswitchd/vswitch.ovsschema > $@
-vswitchd/vswitch.pic: vswitchd/vswitch.gv ovsdb/dot2pic
-       $(AM_V_GEN)(dot -T plain < vswitchd/vswitch.gv | $(PERL) 
$(srcdir)/ovsdb/dot2pic -f 3) > $@.tmp && \
+       $(AM_V_GEN)$(OVSDB_DOT) $(srcdir)/vswitchd/vswitch.ovsschema > $@
+vswitchd/vswitch.eps: vswitchd/vswitch.gv
+       $(AM_V_GEN)(dot -T eps < vswitchd/vswitch.gv) > $@.tmp && \
        mv $@.tmp $@
-VSWITCH_PIC = vswitchd/vswitch.pic
-VSWITCH_DOT_DIAGRAM_ARG = --er-diagram=$(VSWITCH_PIC)
-DISTCLEANFILES += vswitchd/vswitch.gv vswitchd/vswitch.pic
+VSWITCH_PIC = vswitchd/vswitch.eps
+# Install eps diagram to the same folder as the documentation
+VSWITCH_DOT_DIAGRAM_ARG = --er-diagram=vswitch.eps
+man_DEPS += $(VSWITCH_PIC)
+DISTCLEANFILES += vswitchd/vswitch.gv $(VSWITCH_PIC)
+endif
 endif
 endif
 
diff --git a/vtep/automake.mk b/vtep/automake.mk
index eac81d0..e3767c2 100644
--- a/vtep/automake.mk
+++ b/vtep/automake.mk
@@ -26,18 +26,22 @@ pkgdata_DATA += vtep/vtep.ovsschema
 
 # VTEP E-R diagram
 #
-# If "python" or "dot" is not available, then we do not add graphical diagram
-# to the documentation.
+# If "python" or "dot" or "groff" is not available, then we do not add
+# graphical diagram to the documentation.
 if HAVE_PYTHON
 if HAVE_DOT
+if HAVE_GROFF
 vtep/vtep.gv: ovsdb/ovsdb-dot.in vtep/vtep.ovsschema
-       $(AM_V_GEN)$(OVSDB_DOT) --no-arrows $(srcdir)/vtep/vtep.ovsschema > $@
-vtep/vtep.pic: vtep/vtep.gv ovsdb/dot2pic
-       $(AM_V_GEN)(dot -T plain < vtep/vtep.gv | $(PERL) 
$(srcdir)/ovsdb/dot2pic -f 3) > $@.tmp && \
+       $(AM_V_GEN)$(OVSDB_DOT) $(srcdir)/vtep/vtep.ovsschema > $@
+vtep/vtep.eps: vtep/vtep.gv
+       $(AM_V_GEN)(dot -T eps < vtep/vtep.gv) > $@.tmp && \
        mv $@.tmp $@
-VTEP_PIC = vtep/vtep.pic
-VTEP_DOT_DIAGRAM_ARG = --er-diagram=$(VTEP_PIC)
-DISTCLEANFILES += vtep/vtep.gv vtep/vtep.pic
+VTEP_PIC = vtep/vtep.eps
+# Install eps diagram to the same folder as the documentation
+VTEP_DOT_DIAGRAM_ARG = --er-diagram=vtep.eps
+man_DEPS += $(VTEP_PIC)
+DISTCLEANFILES += vtep/vtep.gv $(VTEP_PIC)
+endif
 endif
 endif
 
-- 
1.9.1

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