[Octave-bug-tracker] [bug #62365] history fails to create nested directory on write attempt

[Markus Mützel]

Update of bug #62365 (project octave):

              Item Group:                    None => Unexpected Error or
Warning
                  Status:               Need Info => Confirmed              
        Operating System:                  Mac OS => Any                    
                 Summary: up arrow no longer shows previous command (Mac, CLI)
=> history fails to create nested directory on write attempt

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Follow-up Comment #13:

Confirmed. The function uses POSIX `mkdir` [1] which doesn't create nested
directories IIUC.
Afaict, there is no POSIX function that would create nested directories. We'd
need to spin one ourselves.
Rather than doing that, we could maybe use
`std::filesystem::create_directories` which is part of the filesystem library
standardized in C++17 [2]. We already started talking about whether it's time
to allow C++17 code in Octave. But we didn't come to a conclusion yet...


[1]: https://pubs.opengroup.org/onlinepubs/009695299/functions/mkdir.html
[2]: https://en.cppreference.com/w/cpp/filesystem/create_directory


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