Merge topic 'file-size'

12b471e828 file: add SIZE option

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2639

Tests/RunCMake/file/RunCMakeTest.cmake

@@ -36,6 +36,8 @@ run_cmake(READ_ELF)
 run_cmake(GLOB)
 run_cmake(GLOB_RECURSE)
 run_cmake(GLOB_RECURSE-noexp-FOLLOW_SYMLINKS)
+run_cmake(SIZE)
+run_cmake(SIZE-error-does-not-exist)
 
 # tests are valid both for GLOB and GLOB_RECURSE
 run_cmake(GLOB-sort-dedup)

Tests/RunCMake/file/SIZE-error-does-not-exist-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/file/SIZE-error-does-not-exist-stderr.txt

@@ -0,0 +1,5 @@
+^CMake Error at SIZE-error-does-not-exist.cmake:[0-9]+ \(file\):
+  file SIZE requested of path that is not readable
+  /a/file/that/does-not-exist
+Call Stack \(most recent call first\):
+  CMakeLists.txt:[0-9]+ \(include\)

Tests/RunCMake/file/SIZE-error-does-not-exist.cmake

@@ -0,0 +1,3 @@
+set(file "/a/file/that/does-not-exist")
+
+file(SIZE "${file}" CALCULATED_SIZE)

Tests/RunCMake/file/SIZE.cmake

@@ -0,0 +1,9 @@
+set(file "${CMAKE_CURRENT_BINARY_DIR}/a-test-file")
+
+file(WRITE "${file}" "test")
+
+file(SIZE "${file}" CALCULATED_SIZE)
+
+if (NOT CALCULATED_SIZE EQUAL 4)
+  message(FATAL_ERROR "Unexpected file size")
+endif()