ENH: Create command line api "cmake -E rename"

This extends the "-E" command line mode with a "rename old new"
signature.  The new command atomically renames a file or directory
within a single disk volume.

1 files changed, 16 insertions, 0 deletions

diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index df528e2..83d779b 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -955,6 +955,8 @@ void CMakeCommandUsage(const char* program)
     << "Usage: " << program << " -E [command] [arguments ...]\n"
     << "Available commands: \n"
     << "  chdir dir cmd [args]...   - run command in a given directory\n"
+    << "  rename oldname newname    - rename a file or directory "
+       "(on one volume)\n"
     << "  copy file destination     - copy file to destination (either file "
        "or directory)\n"
     << "  copy_if_different in-file out-file  - copy file if input has "
@@ -1033,6 +1035,20 @@ int cmake::ExecuteCMakeCommand(std::vector<std::string>& args)
       return 0;
       }
 
+    // Rename a file or directory
+    if (args[1] == "rename" && args.size() == 4)
+      {
+      if(!cmSystemTools::RenameFile(args[2].c_str(), args[3].c_str()))
+        {
+        std::string e = cmSystemTools::GetLastSystemError();
+        std::cerr << "Error renaming from \""
+                  << args[2].c_str() << "\" to \"" << args[3].c_str()
+                  << "\": " << e << "\n";
+        return 1;
+        }
+      return 0;
+      }
+
     // Compare files
     if (args[1] == "compare_files" && args.size() == 4)
       {