Add hashing script and sha256 output to uninstall

Author: zbeekman

cmake/hash-installed.cmake.in

@@ -0,0 +1,18 @@
+# Adapted from http://www.cmake.org/Wiki/CMake_FAQ#Can_I_do_.22make_uninstall.22_with_CMake.3F May 1, 2014
+
+if(NOT EXISTS "@CMAKE_BINARY_DIR@/install_manifest.txt")
+  message(FATAL_ERROR "Cannot find install manifest: @CMAKE_BINARY_DIR@/install_manifest.txt")
+endif(NOT EXISTS "@CMAKE_BINARY_DIR@/install_manifest.txt")
+
+file(READ "@CMAKE_BINARY_DIR@/install_manifest.txt" files)
+string(REGEX REPLACE "\n" ";" files "${files}")
+file(WRITE "@CMAKE_BINARY_DIR@/sha256_install_manifest.txt" "")
+foreach(file ${files})
+  if(IS_SYMLINK $ENV{DESTDIR}${file})
+    list(APPEND symbolic_links ${file})
+  endif()
+  file(SHA256 $ENV{DESTDIR}${file} ${file}_sha256)
+  message(STATUS "${${file}_sha256}  $ENV{DESTDIR}${file}")
+  file(APPEND "@CMAKE_BINARY_DIR@/sha256_install_manifest.txt" "${${file}_sha256}  $ENV{DESTDIR}${file}\n")
+endforeach()
+message(STATUS "Symbolic links: ${symbolic_links}")

cmake/uninstall.cmake.in

@@ -6,6 +6,14 @@ endif(NOT EXISTS "@CMAKE_BINARY_DIR@/install_manifest.txt")
 
 file(READ "@CMAKE_BINARY_DIR@/install_manifest.txt" files)
 string(REGEX REPLACE "\n" ";" files "${files}")
+foreach(file ${files})
+  if(NOT IS_SYMLINK $ENV{DESTDIR}${file})
+    file(SHA256 $ENV{DESTDIR}${file} ${file}_sha256)
+    message(STATUS "${${file}_sha256}  $ENV{DESTDIR}${file}")
+  else()
+    message(STATUS "$ENV{DESTDIR}${file} is a symbolic link.")
+  endif()
+endforeach()
 foreach(file ${files})
   message(STATUS "Uninstalling $ENV{DESTDIR}${file}")
   if(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")