[cmake-developers] Listing source-tree files encountered

[Clifford Yapp]

On Sat, Jul 18, 2015 at 1:49 PM, Clifford Yapp <cliffyapp at gmail.com> wrote:
> On Sat, Jul 18, 2015 at 5:30 AM, Florent Castelli
> <florent.castelli at gmail.com> wrote:
>> I've used that once and you end up with the relative path to the sources
>> from the CMakeLists.txt.
>> If you're in another CMakeLists.txt, then you can't use the paths directly.
>> I tried a few properties but I couldn't find any property to get the folder
>> where the target was defined.
>>
>> How do you get the full path?
>
> That's a very good point - using the command override approach, the
> CMAKE_CURRENT_SOURCE_DIR is always the directory of the target in
> question, and looking at our current code I see we do make use of that
> assumption.  We would need a way to find out what
> CMAKE_CURRENT_SOURCE_DIR was when the target was defined if we're
> going to build up a list after the fact - maybe something like
> get_target_property(TDIR <targetname> SOURCE_DIR) to get the source
> directory in which the target was defined.  In combination with the
> SOURCES property it would allow for full path reconstruction.
>
> CY


A quick experiment suggests that this will work for associating and
exposing a source directory with each target - not sure if this dots
all the i's an crosses all the t's though:


diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 2b73e6f..c9281b7 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -2945,6 +2945,7 @@ const char *cmTarget::GetProperty(const std::string& prop,
   MAKE_STATIC_PROP(COMPILE_DEFINITIONS);
   MAKE_STATIC_PROP(IMPORTED);
   MAKE_STATIC_PROP(NAME);
+  MAKE_STATIC_PROP(SOURCE_DIR);
   MAKE_STATIC_PROP(SOURCES);
 #undef MAKE_STATIC_PROP
   if(specialProps.empty())
@@ -2957,6 +2958,7 @@ const char *cmTarget::GetProperty(const std::string& prop,
     specialProps.insert(propCOMPILE_DEFINITIONS);
     specialProps.insert(propIMPORTED);
     specialProps.insert(propNAME);
+    specialProps.insert(propSOURCE_DIR);
     specialProps.insert(propSOURCES);
     }
   if(specialProps.count(prop))
@@ -3039,6 +3041,10 @@ const char *cmTarget::GetProperty(const
std::string& prop,
       {
       return this->GetName().c_str();
       }
+    else if (prop == propSOURCE_DIR)
+      {
+      return this->GetMakefile()->GetCurrentSourceDirectory();
+      }
     else if(prop == propSOURCES)
       {
       if (this->Internal->SourceEntries.empty())