From 5d399d585a0caaae12bf6e10928e1022102470d2 Mon Sep 17 00:00:00 2001
From: Robert Schumacher <roschuma@microsoft.com>
Date: Thu, 22 Feb 2018 06:16:21 -0800
Subject: [opencv] Ensure rework is starting from a fresh set of sources

---
 ports/opencv/portfile.cmake | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/ports/opencv/portfile.cmake b/ports/opencv/portfile.cmake
index 5ccf1c66f..f3efaa779 100644
--- a/ports/opencv/portfile.cmake
+++ b/ports/opencv/portfile.cmake
@@ -2,6 +2,14 @@ include(vcpkg_common_functions)
 
 set(OPENCV_PORT_VERSION "3.4.0")
 
+# This is to ensure we are patching clean sources. These lines can be removed when the OpenCV version is next upgraded.
+if(EXISTS "${CURRENT_BUILDTREES_DIR}/src/opencv-${OPENCV_PORT_VERSION}" AND NOT EXISTS "${CURRENT_BUILDTREES_DIR}/src/opencv-${OPENCV_PORT_VERSION}/rework.stamp")
+  file(REMOVE_RECURSE
+    "${CURRENT_BUILDTREES_DIR}/src/opencv-opencv-${OPENCV_PORT_VERSION}.tar.gz.extracted"
+    "${CURRENT_BUILDTREES_DIR}/src/opencv-${OPENCV_PORT_VERSION}"
+  )
+endif()
+
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO opencv/opencv
@@ -19,6 +27,8 @@ vcpkg_apply_patches(
       "${CMAKE_CURRENT_LIST_DIR}/0004-use-find-package-required.patch"
 )
 
+file(WRITE "${CURRENT_BUILDTREES_DIR}/src/opencv-${OPENCV_PORT_VERSION}/rework.stamp")
+
 vcpkg_download_distfile(TINYDNN_ARCHIVE
     URLS "https://github.com/tiny-dnn/tiny-dnn/archive/v1.0.0a3.tar.gz"
     FILENAME "opencv-cache/tiny_dnn/adb1c512e09ca2c7a6faef36f9c53e59-v1.0.0a3.tar.gz"
-- 
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