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BUG: Alternative fix to bug #8423 

The patch used to fix this bug used SystemTools::GetRealPath which works
only for existing files.  It broke the case of using the command
get_filename_component for a non-existing file.  Also, it changed
long-standing behavior in a possibly incompatible way even for existing
files.  This reverts the original fix and instead updates the
documentation to be consistent with the behavior.
This commit is contained in:
Brad King 2009-02-06 08:33:52 -05:00
parent 0499ca66aa
commit 16fe328dfc
4 changed files with 2 additions and 47 deletions
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3
Source/cmGetFilenameComponentCommand.cxx
View File

@ -91,8 +91,7 @@ bool cmGetFilenameComponentCommand
}
// Collapse the path to its simplest form.
filename = cmSystemTools::CollapseFullPath(filename.c_str());
result = cmSystemTools::GetRealPath(filename.c_str());
result = cmSystemTools::CollapseFullPath(filename.c_str());
}
else
{

2
Source/cmGetFilenameComponentCommand.h
View File

@ -72,7 +72,7 @@ public:
" [CACHE])\n"
"Set VarName to be the path (PATH), file name (NAME), file "
"extension (EXT), file name without extension (NAME_WE) of FileName, "
"or the full absolute (ABSOLUTE) file name without symlinks. "
"or the full path (ABSOLUTE). "
"Note that the path is converted to Unix slashes format and has no "
"trailing slashes. The longest file extension is always considered. "
"If the optional CACHE argument is specified, the result variable is "

1
Tests/CMakeTests/CMakeLists.txt
View File

@ -14,7 +14,6 @@ AddCMakeTest(VariableWatch "")
AddCMakeTest(Include "")
AddCMakeTest(FindBase "")
AddCMakeTest(Toolchain "")
AddCMakeTest(GetFilenameComponentSymlinks "")
SET(GetPrerequisites_PreArgs
"-DCTEST_CONFIGURATION_TYPE:STRING=\\\${CTEST_CONFIGURATION_TYPE}"

43
Tests/CMakeTests/GetFilenameComponentSymlinksTest.cmake.in
View File

@ -1,43 +0,0 @@
if(UNIX)
# file1 => file2 => file3 (real)
set(bindir ${CMAKE_CURRENT_BINARY_DIR})
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 ABSOLUTE)
get_filename_component(file2 ${bindir}/file2 ABSOLUTE)
get_filename_component(file3 ${bindir}/file3 ABSOLUTE)
if(NOT file3 STREQUAL "${bindir}/file3")
message(FATAL_ERROR "CMake fails resolving absolute 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)
file(REMOVE ${bindir}/file3)
if(EXISTS file1 OR EXISTS file2 OR EXISTS file3)
message(FATAL_ERROR "removal of file1, file2, or file3 failed")
endif()
endif(LN)
endif()