1set(bindir ${CMAKE_CURRENT_BINARY_DIR})
2
3#
4# Test nonexistent REALPATH & ABSOLUTE resolution
5#
6get_filename_component(nonexistent1 ${bindir}/THIS_IS_A_NONEXISTENT_FILE REALPATH)
7get_filename_component(nonexistent2 ${bindir}/THIS_IS_A_NONEXISTENT_FILE ABSOLUTE)
8if(NOT nonexistent1 STREQUAL "${bindir}/THIS_IS_A_NONEXISTENT_FILE")
9    message(FATAL_ERROR "REALPATH is not preserving nonexistent files")
10endif()
11if(NOT nonexistent2 STREQUAL "${bindir}/THIS_IS_A_NONEXISTENT_FILE")
12    message(FATAL_ERROR "ABSOLUTE is not preserving nonexistent files")
13endif()
14
15#
16# Test treatment of relative paths
17#
18foreach(c REALPATH ABSOLUTE)
19  get_filename_component(dir "subdir/THIS_IS_A_NONEXISTENT_FILE" ${c})
20  if(NOT "${dir}" STREQUAL "${bindir}/subdir/THIS_IS_A_NONEXISTENT_FILE")
21    message(FATAL_ERROR
22      "${c} does not handle relative paths.  Expected:\n"
23      "  ${bindir}/subdir/THIS_IS_A_NONEXISTENT_FILE\n"
24      "but got:\n"
25      "  ${nonexistent1}\n"
26      )
27  endif()
28endforeach()
29
30#
31# Test symbolic link resolution
32#
33if(UNIX)
34    # file1 => file2 => file3 (real)
35    file(WRITE ${bindir}/file3 "test file")
36
37    find_program(LN NAMES "ln")
38    if(LN)
39        # Create symlinks using "ln -s"
40        if(NOT EXISTS ${bindir}/file2)
41            execute_process(COMMAND ${LN} "-s" "${bindir}/file3" "${bindir}/file2")
42        endif()
43        if(NOT EXISTS ${bindir}/file1)
44            execute_process(COMMAND ${LN} "-s" "${bindir}/file2" "${bindir}/file1")
45        endif()
46
47        get_filename_component(file1 ${bindir}/file1 REALPATH)
48        get_filename_component(file2 ${bindir}/file2 REALPATH)
49        get_filename_component(file3 ${bindir}/file3 REALPATH)
50
51        if(NOT file3 STREQUAL "${bindir}/file3")
52            message(FATAL_ERROR "CMake fails resolving REALPATH file file3")
53        endif()
54
55        if(NOT file2 STREQUAL "${bindir}/file3")
56            message(FATAL_ERROR "CMake fails resolving simple symlink")
57        endif()
58
59        if(NOT file1 STREQUAL "${bindir}/file3")
60            message(FATAL_ERROR "CMake fails resolving double symlink")
61        endif()
62
63        # cleanup
64        file(REMOVE ${bindir}/file1)
65        file(REMOVE ${bindir}/file2)
66        if(EXISTS file1 OR EXISTS file2)
67           message(FATAL_ERROR "removal of file1 or file2 failed")
68        endif()
69    endif()
70
71    file(REMOVE ${bindir}/file3)
72endif()
73