ENH: Added READ_WITH_PREFIX option to LOAD_CACHE command. This allows reading of cache values from another cache without actually creating local copies of the cache entires. The values are stored as prefixed local makefile variables.

1 files changed, 13 insertions, 1 deletions

diff --git a/Source/cmLoadCacheCommand.h b/Source/cmLoadCacheCommand.h
index c0b5ad7..925cd3b 100644
--- a/Source/cmLoadCacheCommand.h
+++ b/Source/cmLoadCacheCommand.h
@@ -65,14 +65,26 @@ public:
     {
     return
       "LOAD_CACHE(pathToCacheFile [EXCLUDE entry1...] [INCLUDE_INTERNALS entry1...])\n"
+      "LOAD_CACHE(pathToCacheFile READ_WITH_PREFIX prefix entry1...)\n"
       "Load in the values from another cache. This is useful for a project "
       "that depends on another project built in a different tree."
       "EXCLUDE option can be used to provide a list of entries to be excluded."
       "INCLUDE_INTERNALS can be used to provide a list of internal entries"
-      "to be included. Normally, no internal entries are brougt in.";
+      "to be included. Normally, no internal entries are brougt in.\n"
+      "The READ_WITH_PREFIX form will read the cache and store the requested "
+      "entries in variables with their name prefixed with the given prefix.  "
+      "This form only reads the values, and does not create local cache entries.";
     }
   
   cmTypeMacro(cmLoadCacheCommand, cmCommand);
+protected:
+  
+  std::set<cmStdString> VariablesToRead;
+  std::string Prefix;
+  
+  bool ReadWithPrefix(std::vector<std::string> const& args);
+  void CheckLine(const char* line);
+  bool ParseEntry(const char* entry, std::string& var, std::string& value);
 };