[Octave-bug-tracker] [bug #36677] canonicalize_file_name: inconsistent behavior for non-existing files

[Philip Nienhuis]

Follow-up Comment #11, bug #36677 (project octave):

Thanks.

My C++ proficiency is simply too meager to be able to fix this.
But I can outline what the code might need to do:


- check if we're on Windows
  - if yes, check if "filename" contains leading drive letter
    (e.g., a pattern like [a-zA-Z]: )
    ## FIXME: what to do with 'file:///...' constructs? These
    ## are not supported but are fairly generally used
    - if yes, get/isolate that driveletter
      .compare with drive letter of cwd
      - if (not equal)
        opwd = pwd  # save current dir
        # get current dit on other drive. s/th like "system"?
        .[~, npwd] = system ("cd <driveletter>:")
        .cd (npwd)
        .make_absolute_filename (filename)
        # Ready. Restore
        .cd (opwd)
      endif
    endif
  endif
endif


The idea is of course to temporarily switch to the other drive to avoid
do_make_absolute cluttering up.

Other than that on windows it doesn't work across drive letters (with files
that exist or not), make_absolute_filename indeed fits the bill.

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