Suggested way to join filepaths in vim

Question

In python I will often do something like:

os.path.join('/some/path/', 'something', 'file.mov')

Or it can be done using Path(...). What's the suggested way to do this in vim? For example, here is the way I'm currently creating a log file in the same directory as the script:

let log_file = expand('%:p:h') . '/file.log'

Is there a better way to do this?

Answer 1

I've a lh#path#join() function in my library, but honestly... I never use it. In the end, it always comes down to string concatenation, and / always works, even on Windows. When I need to interact with external processes, I have other functions that correctly protect pathnames.

" Function: lh#path#join(pathparts, {path_separator}) {{{3
function! lh#path#join(pathparts, ...) abort
  let sep
        \ = (a:0) == 0                       ? '/'
        \ : type(a:1)==type(0) && (a:1) == 0 ? '/'
        \ : (a:1) == 1                       ? '\'
        \ : (a:1) =~ 'shellslash\|ssl'       ? (&ssl ? '\' : '/')
        \ :                                    (a:1)
  return join(a:pathparts, sep)
endfunction