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Merge topic 'file_install_always_out_of_date_fix'

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6dcd1bfa39 file(INSTALL): Preserve file time when writing NTFS alternate stream

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1992
This commit is contained in:
Brad King
2018-04-25 12:52:08 +00:00
committed by Kitware Robot
parent 92eae6b72d 6dcd1bfa39
commit 52c11e4f64
1 changed files with 12 additions and 0 deletions
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Source/cmFileCommand.cxx
+12
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@@ -1129,14 +1129,26 @@ protected:
if (permissions) {
#ifdef WIN32
if (Makefile->IsOn("CMAKE_CROSSCOMPILING")) {
// Store the mode in an NTFS alternate stream.
std::string mode_t_adt_filename =
std::string(toFile) + ":cmake_mode_t";
// Writing to an NTFS alternate stream changes the modification
// time, so we need to save and restore its original value.
cmSystemToolsFileTime* file_time_orig = cmSystemTools::FileTimeNew();
cmSystemTools::FileTimeGet(toFile, file_time_orig);
cmsys::ofstream permissionStream(mode_t_adt_filename.c_str());
if (permissionStream) {
permissionStream << std::oct << permissions << std::endl;
}
permissionStream.close();
cmSystemTools::FileTimeSet(toFile, file_time_orig);
cmSystemTools::FileTimeDelete(file_time_orig);
}
#endif