ExternalData: Add option to recursively match under directories

Extend the ``DATA{Dir/,...}`` syntax with a new ``RECURSE:`` option
to enable recursive matching of associated files.  This will allow
an entire directory tree of data to be referenced at once.

1 files changed, 9 insertions, 0 deletions

diff --git a/Tests/RunCMake/ExternalData/BadRecurse3-stderr.txt b/Tests/RunCMake/ExternalData/BadRecurse3-stderr.txt
new file mode 100644
index 0000000..37740e0
--- /dev/null
+++ b/Tests/RunCMake/ExternalData/BadRecurse3-stderr.txt
@@ -0,0 +1,9 @@
+CMake Error at .*/Modules/ExternalData.cmake:[0-9]+ \(message\):
+  Unknown option "RECURSE:x" in argument
+
+    DATA{Directory1/,RECURSE:x,Data.dat}
+
+Call Stack \(most recent call first\):
+  .*
+  BadRecurse3.cmake:2 \(ExternalData_Expand_Arguments\)
+  CMakeLists.txt:3 \(include\)