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94d65a9535
Revert commit c554437733 (get_filename_component: Fix REALPATH for ..
after symlink, 2024-11-21, v4.0.0-rc1~411^2) because it changed existing
behavior without a policy. Also add a test case for the old behavior.
Note that we have policy `CMP0152` to fix this for `file(REAL_PATH)`,
but it does not affect `get_filename_component(... REALPATH)`. A new
policy would be needed for the latter.
Fixes: #26815
Issue: #26472
89 lines
2.7 KiB
CMake
89 lines
2.7 KiB
CMake
set(bindir ${CMAKE_CURRENT_BINARY_DIR})
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#
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# Test nonexistent REALPATH & ABSOLUTE resolution
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#
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get_filename_component(nonexistent1 ${bindir}/THIS_IS_A_NONEXISTENT_FILE REALPATH)
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get_filename_component(nonexistent2 ${bindir}/THIS_IS_A_NONEXISTENT_FILE ABSOLUTE)
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if(NOT nonexistent1 STREQUAL "${bindir}/THIS_IS_A_NONEXISTENT_FILE")
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message(FATAL_ERROR "REALPATH is not preserving nonexistent files")
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endif()
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if(NOT nonexistent2 STREQUAL "${bindir}/THIS_IS_A_NONEXISTENT_FILE")
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message(FATAL_ERROR "ABSOLUTE is not preserving nonexistent files")
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endif()
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#
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# Test treatment of .. after file name
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#
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foreach(c REALPATH ABSOLUTE)
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get_filename_component(dir "${CMAKE_CURRENT_LIST_DIR}" ${c})
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get_filename_component(fileDotDot "${CMAKE_CURRENT_LIST_FILE}/.." ${c})
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if(NOT "${fileDotDot}" STREQUAL "${dir}")
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message(FATAL_ERROR
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"${c} did not resolve\n"
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" ${CMAKE_CURRENT_LIST_FILE}/..\n"
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"lexically:\n"
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" ${fileDotDot}"
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)
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endif()
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endforeach()
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#
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# Test treatment of relative paths
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#
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foreach(c REALPATH ABSOLUTE)
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get_filename_component(dir "subdir/THIS_IS_A_NONEXISTENT_FILE" ${c})
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if(NOT "${dir}" STREQUAL "${bindir}/subdir/THIS_IS_A_NONEXISTENT_FILE")
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message(FATAL_ERROR
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"${c} does not handle relative paths. Expected:\n"
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" ${bindir}/subdir/THIS_IS_A_NONEXISTENT_FILE\n"
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"but got:\n"
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" ${nonexistent1}\n"
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)
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endif()
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endforeach()
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#
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# Test symbolic link resolution
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#
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if(UNIX)
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# file1 => file2 => file3 (real)
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file(WRITE ${bindir}/file3 "test file")
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find_program(LN NAMES "ln")
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if(LN)
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# Create symlinks using "ln -s"
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if(NOT EXISTS ${bindir}/file2)
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execute_process(COMMAND ${LN} "-s" "${bindir}/file3" "${bindir}/file2")
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endif()
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if(NOT EXISTS ${bindir}/file1)
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execute_process(COMMAND ${LN} "-s" "${bindir}/file2" "${bindir}/file1")
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endif()
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get_filename_component(file1 ${bindir}/file1 REALPATH)
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get_filename_component(file2 ${bindir}/file2 REALPATH)
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get_filename_component(file3 ${bindir}/file3 REALPATH)
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if(NOT file3 STREQUAL "${bindir}/file3")
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message(FATAL_ERROR "CMake fails resolving REALPATH file file3")
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endif()
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if(NOT file2 STREQUAL "${bindir}/file3")
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message(FATAL_ERROR "CMake fails resolving simple symlink")
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endif()
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if(NOT file1 STREQUAL "${bindir}/file3")
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message(FATAL_ERROR "CMake fails resolving double symlink")
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endif()
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# cleanup
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file(REMOVE ${bindir}/file1)
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file(REMOVE ${bindir}/file2)
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if(EXISTS file1 OR EXISTS file2)
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message(FATAL_ERROR "removal of file1 or file2 failed")
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endif()
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endif()
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file(REMOVE ${bindir}/file3)
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endif()
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