From 96fa0fcff12f99652277c4a0898f6623115488ee Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Mon, 25 Mar 2013 23:14:19 +0000
Subject: [PATCH] Introduce a tiny CMake project to gather Subversion revision
 information and place it into a header.

llvm-svn: 177938
---
 llvm/cmake/modules/GetSVN.cmake | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 llvm/cmake/modules/GetSVN.cmake

diff --git a/llvm/cmake/modules/GetSVN.cmake b/llvm/cmake/modules/GetSVN.cmake
new file mode 100644
index 0000000..acccc12
--- /dev/null
+++ b/llvm/cmake/modules/GetSVN.cmake
@@ -0,0 +1,25 @@
+# CMake project that writes Subversion revision information to a header.
+#
+# Input variables:
+#   FIRST_SOURCE_DIR  - First source directory
+#   FIRST_REPOSITORY  - The macro to define to the first revision number.
+#   SECOND_SOURCE_DIR - Second source directory
+#   SECOND_REPOSITORY - The macro to define to the second revision number.
+#   HEADER_FILE       - The header file to write
+include(FindSubversion)
+if (Subversion_FOUND AND EXISTS "${FIRST_SOURCE_DIR}/.svn")
+  # Repository information for the first repository.
+  Subversion_WC_INFO(${FIRST_SOURCE_DIR} MY)
+  file(WRITE ${HEADER_FILE}.txt "#define ${FIRST_REPOSITORY} \"${MY_WC_REVISION}\"\n")
+
+  # Repository information for the second repository.
+  if (EXISTS "${SECOND_SOURCE_DIR}/.svn")
+    Subversion_WC_INFO(${SECOND_SOURCE_DIR} MY)
+    file(APPEND ${HEADER_FILE}.txt 
+      "#define ${SECOND_REPOSITORY} \"${MY_WC_REVISION}\"\n")
+  endif ()
+
+  # Copy the file only if it has changed.
+  execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
+    ${HEADER_FILE}.txt ${HEADER_FILE})
+endif()
-- 
2.7.4