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set(bindir ${CMAKE_CURRENT_BINARY_DIR})
#
# Test nonexistent REALPATH & ABSOLUTE resolution
#
get_filename_component(nonexistent1 ${bindir}/THIS_IS_A_NONEXISTENT_FILE REALPATH)
get_filename_component(nonexistent2 ${bindir}/THIS_IS_A_NONEXISTENT_FILE ABSOLUTE)
if(NOT nonexistent1 STREQUAL "${bindir}/THIS_IS_A_NONEXISTENT_FILE")
message(FATAL_ERROR "REALPATH is not preserving nonexistent files")
endif()
if(NOT nonexistent2 STREQUAL "${bindir}/THIS_IS_A_NONEXISTENT_FILE")
message(FATAL_ERROR "ABSOLUTE is not preserving nonexistent files")
endif()
#
# Test treatment of .. after file name
#
foreach(c REALPATH ABSOLUTE)
get_filename_component(dir "${CMAKE_CURRENT_LIST_DIR}" ${c})
get_filename_component(fileDotDot "${CMAKE_CURRENT_LIST_FILE}/.." ${c})
if(NOT "${fileDotDot}" STREQUAL "${dir}")
message(FATAL_ERROR
"${c} did not resolve\n"
" ${CMAKE_CURRENT_LIST_FILE}/..\n"
"lexically:\n"
" ${fileDotDot}"
)
endif()
endforeach()
#
# Test treatment of relative paths
#
foreach(c REALPATH ABSOLUTE)
get_filename_component(dir "subdir/THIS_IS_A_NONEXISTENT_FILE" ${c})
if(NOT "${dir}" STREQUAL "${bindir}/subdir/THIS_IS_A_NONEXISTENT_FILE")
message(FATAL_ERROR
"${c} does not handle relative paths. Expected:\n"
" ${bindir}/subdir/THIS_IS_A_NONEXISTENT_FILE\n"
"but got:\n"
" ${nonexistent1}\n"
)
endif()
endforeach()
#
# Test symbolic link resolution
#
if(UNIX)
# file1 => file2 => file3 (real)
file(WRITE ${bindir}/file3 "test file")
find_program(LN NAMES "ln")
if(LN)
# Create symlinks using "ln -s"
if(NOT EXISTS ${bindir}/file2)
execute_process(COMMAND ${LN} "-s" "${bindir}/file3" "${bindir}/file2")
endif()
if(NOT EXISTS ${bindir}/file1)
execute_process(COMMAND ${LN} "-s" "${bindir}/file2" "${bindir}/file1")
endif()
get_filename_component(file1 ${bindir}/file1 REALPATH)
get_filename_component(file2 ${bindir}/file2 REALPATH)
get_filename_component(file3 ${bindir}/file3 REALPATH)
if(NOT file3 STREQUAL "${bindir}/file3")
message(FATAL_ERROR "CMake fails resolving REALPATH file file3")
endif()
if(NOT file2 STREQUAL "${bindir}/file3")
message(FATAL_ERROR "CMake fails resolving simple symlink")
endif()
if(NOT file1 STREQUAL "${bindir}/file3")
message(FATAL_ERROR "CMake fails resolving double symlink")
endif()
# cleanup
file(REMOVE ${bindir}/file1)
file(REMOVE ${bindir}/file2)
if(EXISTS file1 OR EXISTS file2)
message(FATAL_ERROR "removal of file1 or file2 failed")
endif()
endif()
file(REMOVE ${bindir}/file3)
endif()
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