From 79f1dfa1f3573e0b48a5e66d8d9d58df2a7bd2c5 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Mon, 25 Mar 2013 23:14:19 +0000
Subject: [PATCH 1/1] Introduce a tiny CMake project to gather Subversion
 revision information and place it into a header.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177938 91177308-0d34-0410-b5e6-96231b3b80d8
---
 cmake/modules/GetSVN.cmake | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 cmake/modules/GetSVN.cmake

diff --git a/cmake/modules/GetSVN.cmake b/cmake/modules/GetSVN.cmake
new file mode 100644
index 00000000000..acccc12a94e
--- /dev/null
+++ b/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()
-- 
2.34.1