From 18bef4cd66e62b0cb167767f121e54161749c2f8 Mon Sep 17 00:00:00 2001
From: Daniel Pfeifer <daniel@pfeifer-mail.de>
Date: Sun, 9 Feb 2014 22:58:44 +0100
Subject: graphviz: allow to disable per target graphs (#14746)

In CMakeGraphVizOptions.cmake, allow the options GRAPHVIZ_GENERATE_PER_TARGET
and GRAPHVIZ_GENERATE_DEPENDERS to enable the generation of per target graphs
and subgraphs respectively. Both options are TRUE per default to maintain
current behavior.
---
 Modules/CMakeGraphVizOptions.cmake | 14 ++++++++++++++
 Source/cmGraphVizWriter.cxx        | 14 ++++++++++++++
 Source/cmGraphVizWriter.h          |  2 ++
 3 files changed, 30 insertions(+)

diff --git a/Modules/CMakeGraphVizOptions.cmake b/Modules/CMakeGraphVizOptions.cmake
index f2b8e59..64c89b9 100644
--- a/Modules/CMakeGraphVizOptions.cmake
+++ b/Modules/CMakeGraphVizOptions.cmake
@@ -93,6 +93,20 @@
 #
 #  * Mandatory : NO
 #  * Default   : empty
+#
+# .. variable:: GRAPHVIZ_GENERATE_PER_TARGET
+#
+#  Set this to FALSE to exclude per target graphs ``foo.dot.<target>``.
+#
+#  * Mandatory : NO
+#  * Default   : TRUE
+#
+# .. variable:: GRAPHVIZ_GENERATE_DEPENDERS
+#
+#  Set this to FALSE to exclude depender graphs ``foo.dot.<target>.dependers``.
+#
+#  * Mandatory : NO
+#  * Default   : TRUE
 
 #=============================================================================
 # Copyright 2007-2009 Kitware, Inc.
diff --git a/Source/cmGraphVizWriter.cxx b/Source/cmGraphVizWriter.cxx
index 3a7070e..db964a9 100644
--- a/Source/cmGraphVizWriter.cxx
+++ b/Source/cmGraphVizWriter.cxx
@@ -53,6 +53,8 @@ cmGraphVizWriter::cmGraphVizWriter(const std::vector<cmLocalGenerator*>&
 ,GenerateForSharedLibs(true)
 ,GenerateForModuleLibs(true)
 ,GenerateForExternals(true)
+,GeneratePerTarget(true)
+,GenerateDependers(true)
 ,LocalGenerators(localGenerators)
 ,HaveTargetsAndLibs(false)
 {
@@ -116,6 +118,8 @@ void cmGraphVizWriter::ReadSettings(const char* settingsFileName,
   __set_bool_if_set(this->GenerateForSharedLibs, "GRAPHVIZ_SHARED_LIBS");
   __set_bool_if_set(this->GenerateForModuleLibs, "GRAPHVIZ_MODULE_LIBS");
   __set_bool_if_set(this->GenerateForExternals, "GRAPHVIZ_EXTERNAL_LIBS");
+  __set_bool_if_set(this->GeneratePerTarget, "GRAPHVIZ_GENERATE_PER_TARGET");
+  __set_bool_if_set(this->GenerateDependers, "GRAPHVIZ_GENERATE_DEPENDERS");
 
   cmStdString ignoreTargetsRegexes;
   __set_if_set(ignoreTargetsRegexes, "GRAPHVIZ_IGNORE_TARGETS");
@@ -149,6 +153,11 @@ void cmGraphVizWriter::ReadSettings(const char* settingsFileName,
 // which other targets depend on it.
 void cmGraphVizWriter::WriteTargetDependersFiles(const char* fileName)
 {
+  if(this->GenerateDependers == false)
+    {
+    return;
+    }
+
   this->CollectTargetsAndLibs();
 
   for(std::map<cmStdString, const cmTarget*>::const_iterator ptrIt =
@@ -195,6 +204,11 @@ void cmGraphVizWriter::WriteTargetDependersFiles(const char* fileName)
 // on which targets it depends.
 void cmGraphVizWriter::WritePerTargetFiles(const char* fileName)
 {
+  if(this->GeneratePerTarget == false)
+    {
+    return;
+    }
+
   this->CollectTargetsAndLibs();
 
   for(std::map<cmStdString, const cmTarget*>::const_iterator ptrIt =
diff --git a/Source/cmGraphVizWriter.h b/Source/cmGraphVizWriter.h
index f784aa0..17b97f8 100644
--- a/Source/cmGraphVizWriter.h
+++ b/Source/cmGraphVizWriter.h
@@ -74,6 +74,8 @@ protected:
   bool GenerateForSharedLibs;
   bool GenerateForModuleLibs;
   bool GenerateForExternals;
+  bool GeneratePerTarget;
+  bool GenerateDependers;
 
   std::vector<cmsys::RegularExpression> TargetsToIgnoreRegex;
 
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