From 7dfd23ec280f53f66593e19069cb0413745758fd Mon Sep 17 00:00:00 2001
From: Eric NOULARD <eric.noulard@gmail.com>
Date: Thu, 29 Jul 2010 14:31:50 +0200
Subject: [PATCH] CPack  handle symlinks in CPACK_INSTALLED_DIRECTORIES fix for bug5430

The proposed solution is to avoid to CopyIfDifferent any links
found in CPACK_INSTALLED_DIRECTORIES but memorize them instead
then at the end of the processing for each dir do re-create the
link in the installed tree.
Current patch should work if the link are "local" to the directory.

Signed-off-by: Eric NOULARD <eric.noulard@gmail.com>
---
 Source/CPack/cmCPackGenerator.cxx |   36 +++++++++++++++++++++++++++++++++++-
 1 files changed, 35 insertions(+), 1 deletions(-)

diff --git a/Source/CPack/cmCPackGenerator.cxx b/Source/CPack/cmCPackGenerator.cxx
index 4a4b428..9612661 100644
--- a/Source/CPack/cmCPackGenerator.cxx
+++ b/Source/CPack/cmCPackGenerator.cxx
@@ -291,6 +291,7 @@ int cmCPackGenerator::InstallProjectViaInstalledDirectories(
   (void)setDestDir;
   (void)tempInstallDirectory;
   std::vector<cmsys::RegularExpression> ignoreFilesRegex;
+
   const char* cpackIgnoreFiles = this->GetOption("CPACK_IGNORE_FILES");
   if ( cpackIgnoreFiles )
     {
@@ -328,6 +329,7 @@ int cmCPackGenerator::InstallProjectViaInstalledDirectories(
       it != installDirectoriesVector.end();
       ++it )
       {
+      std::list<std::pair<std::string,std::string> > symlinkedFiles;
       cmCPackLogger(cmCPackLog::LOG_DEBUG, "Find files" << std::endl);
       cmsys::Glob gl;
       std::string toplevel = it->c_str();
@@ -371,7 +373,15 @@ int cmCPackGenerator::InstallProjectViaInstalledDirectories(
           + cmSystemTools::RelativePath(toplevel.c_str(), gfit->c_str());
         cmCPackLogger(cmCPackLog::LOG_DEBUG, "Copy file: "
           << inFile.c_str() << " -> " << filePath.c_str() << std::endl);
-        if ( !cmSystemTools::CopyFileIfDifferent(inFile.c_str(),
+        /* If the file is a symlink we will have to re-create it */
+        if ( cmSystemTools::FileIsSymlink(inFile.c_str())) {
+                std::string targetFile;
+                std::string inFileRelative = cmSystemTools::RelativePath(toplevel.c_str(),inFile.c_str());
+                cmSystemTools::ReadSymlink(inFile.c_str(),targetFile);
+                symlinkedFiles.push_back(std::pair<std::string,std::string>(targetFile,inFileRelative));
+        }
+        /* If it is not a symlink then do a plain copy */
+        else if ( !cmSystemTools::CopyFileIfDifferent(inFile.c_str(),
             filePath.c_str()) )
           {
           cmCPackLogger(cmCPackLog::LOG_ERROR, "Problem copying file: "
@@ -379,6 +389,30 @@ int cmCPackGenerator::InstallProjectViaInstalledDirectories(
           return 0;
           }
         }
+      /* rebuild symlinks in the installed tree */
+      if (symlinkedFiles.size()>0)
+        {
+        std::list< std::pair<std::string,std::string> >::iterator symlinkedIt;
+        std::string curDir = cmSystemTools::GetCurrentWorkingDirectory();
+        std::string goToDir = tempDir;
+        goToDir  += "/"+subdir;
+        cmCPackLogger(cmCPackLog::LOG_DEBUG, "Change dir to: " << goToDir <<std::endl);
+        cmSystemTools::ChangeDirectory(goToDir.c_str());
+        for (symlinkedIt=symlinkedFiles.begin();
+             symlinkedIt != symlinkedFiles.end();
+             ++symlinkedIt)
+          {
+          cmCPackLogger(cmCPackLog::LOG_DEBUG, "Will create a symlink: " << symlinkedIt->second << "--> "<<symlinkedIt->first << std::endl);
+         if (!cmSystemTools::CreateSymlink((symlinkedIt->first).c_str(),(symlinkedIt->second).c_str()))
+            {
+               cmCPackLogger(cmCPackLog::LOG_ERROR, "Cannot create symlink: "
+                                 << symlinkedIt->second << "--> "<<symlinkedIt->first << std::endl);
+                return 0;
+            }
+          }
+        cmCPackLogger(cmCPackLog::LOG_DEBUG, "Going back to: " << curDir <<std::endl);
+        cmSystemTools::ChangeDirectory(curDir.c_str());
+        }
       }
     }
   return 1;
-- 
1.7.1