Create generic directory traversal method, introduce `buildboxcommon_direntwrapper`, and add support for `chmod`'ing directories.

Arber Xrequested to merge
arber/change_execute_directory_permissions into master

Description

  • RAII wrapper around dirent.h.
  • recursively_chmod_directories function in FileUtils.
  • A method for generic directory traversal used by delete_directory, clear_directory, recursively_chmod_directories and directory_is_empty.
  • Add support for specifying file mode in create_directory.
  • Compiler warning fixes. (Can be moved to a separate PR).
  • Add buildboxcommon_testutils.h as a common place to store utilites used across all tests.

TODO

  • Add generic directory traversal function.
  • Add tests for recursively_chmod_directories
  • Add tests for buildboxcommon_direntwrapper (Sort of already tested with calls to FileUtils.
Edited by Arber X

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