[cmake-developers] Install quiet option

[J Decker]

in the vein of http://www.cmake.org/Wiki/CMake_Useful_Variables
CMAKE_INSTALL_ALWAYS
patch adds CMAKE_INSTALL_QUIET

This bypasses 'Up-to-date:'  on file that are up to date
and 'Installing' on directories that already exist and are directories.

There are 3 places that call 'ReportCopy' the third is when symlinks are
made; I have no way to test an appropriate modification to bypass it's
status when really no action taken.

Not sure header on diff is appropriate for applying
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--- source\cmFileCommand.cxx	Mon Jun  9 08:52:04 2014
+++ source\cmFileCommand.cxx.new	Fri Jun 13 14:05:40 2014
@@ -964,6 +964,7 @@
     UseGivenPermissionsFile(false),
     UseGivenPermissionsDir(false),
     UseSourcePermissions(true),
+    InstallQuiet(false),
     Doing(DoingNone)
     {
     }
@@ -1100,6 +1101,7 @@
   bool UseGivenPermissionsFile;
   bool UseGivenPermissionsDir;
   bool UseSourcePermissions;
+  bool InstallQuiet;
   std::string Destination;
   std::vector<std::string> Files;
   int Doing;
@@ -1611,7 +1615,10 @@
                                     MatchProperties const& match_properties)
 {
   // Inform the user about this directory installation.
-  this->ReportCopy(destination, TypeDir, true);
+  if( !this->InstallQuiet 
+    || !cmSystemTools::FileExists(destination) 
+    || !cmSystemTools::FileIsDirectory(destination) )
+     this->ReportCopy(destination, TypeDir, true);
 
   // Make sure the destination directory exists.
   if(!cmSystemTools::MakeDirectory(destination))
@@ -1706,6 +1713,9 @@
     {
     // Installation does not use source permissions by default.
     this->UseSourcePermissions = false;
+    // Check whether to report all directories and up-to-date-files or only those created/installed.
+    this->InstallQuiet =
+      cmSystemTools::IsOn(cmSystemTools::GetEnv("CMAKE_INSTALL_QUIET"));
     // Check whether to copy files always or only if they have changed.
     this->Always =
       cmSystemTools::IsOn(cmSystemTools::GetEnv("CMAKE_INSTALL_ALWAYS"));
@@ -1740,7 +1750,8 @@
     {
     std::string message = (copy? "Installing: " : "Up-to-date: ");
     message += toFile;
-    this->Makefile->DisplayStatus(message.c_str(), -1);
+    if( copy || !this->InstallQuiet )
+      this->Makefile->DisplayStatus(message.c_str(), -1);
     if(type != TypeDir)
       {
       // Add the file to the manifest.