vimlrs 0.2.1

Faithful Rust port of the Vimscript (VimL) interpreter, from the Neovim C eval engine
Documentation 
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" stdpath.vim — XDG standard paths, plus the last editor/provider builtins.
"
" stdpath() resolves Nvim's standard directories from the XDG base-directory
" environment variables (with ~/.config-style defaults) and the 'nvim' app
" subdir. The remaining builtins (keytrans, the lua/ruby providers, terminal,
" GUI file dialogs, 'path' search) have no standalone backing and return their
" documented inactive values. Self-checks.
"
"   vimlrs examples/stdpath.vim

let home = $HOME

" ── stdpath(): XDG dirs + the 'nvim' app subdir ──
call assert_equal(home . '/.cache/nvim', stdpath('cache'))
call assert_equal(home . '/.local/share/nvim', stdpath('data'))
call assert_equal(home . '/.local/state/nvim', stdpath('state'))
call assert_equal(home . '/.local/state/nvim/logs', stdpath('log'))
call assert_equal(home . '/.config/nvim', stdpath('config'))
" The *_dirs kinds return a List.
call assert_equal(type([]), type(stdpath('config_dirs')))
call assert_equal(type(''), type(stdpath('run')))

" ── the app subdir honours $NVIM_APPNAME (get_appname), 'nvim' by default ──
" Derive the expected appname so this holds whether or not NVIM_APPNAME is set.
let appname = getenv('NVIM_APPNAME')
if appname == v:null || appname ==# ''
  let appname = 'nvim'
endif
for kind in ['config', 'data', 'cache', 'state']
  call assert_match('/' . appname . '$', stdpath(kind))
endfor
for d in stdpath('config_dirs') + stdpath('data_dirs')
  call assert_match('/' . appname . '$', d)
endfor
" An unknown kind is an error.
call assert_fails("call stdpath('bogus')", 'E6100')

" ── remaining inactive builtins ──
call assert_equal('plain', keytrans('plain'))
call assert_equal(v:null, luaeval('vim.fn'))
call assert_equal(v:null, rubyeval('1'))
call assert_equal(-1, termopen('sh'))
call assert_equal('', browse(0, 'Save', '.', ''))
call assert_equal('', findfile('nope.xyz'))
call assert_equal('', finddir('nope'))

" ── demo ──
echo 'config dir would be:' stdpath('config')

" ── self-test epilogue ──
if !empty(v:errors)
  for e in v:errors
    echo 'FAIL:' e
  endfor
  throw len(v:errors) . ' assertion(s) failed'
endif
echo 'OK: stdpath assertions passed'