fix(mappings): respect g:nuwiki_wikis in global entry-point helpers

The global <Leader>ww / diary helpers read g:nuwiki_wiki_root directly,
so they always opened the root-level index.wiki even when the user had
configured per-wiki roots via g:nuwiki_wikis (e.g. personal_wiki.root =
'~/.vimwiki/personal_wiki').

Vim path (autoload): replace the three open_*_path functions with a
shared s:wiki_cfg(n) helper that checks g:nuwiki_wikis[n] first, then
falls back to the scalar g:nuwiki_* vars and built-in defaults.

Lua path (init.lua): replace the separate _wiki_index_path /_diary_path
locals with a unified _wiki_cfg() that checks setup() opts.wikis, then
vim.g.nuwiki_wikis (for users who configure via VimL rather than
setup()), then scalar opts / g: vars.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

autoload/nuwiki/commands.vim

@@ -348,28 +348,44 @@ endfunction
 " open their wiki from any buffer. Files are opened directly from config;
 " the LSP auto-starts via the FileType autocmd once the buffer loads.
 
-function! nuwiki#commands#open_wiki_path(tab) abort
+" Return a dict with {root, ext, idx, diary_rel, diary_idx} for wiki #n
-  let l:root = expand(get(g:, 'nuwiki_wiki_root', '~/vimwiki'))
+" (0-based). Prefers g:nuwiki_wikis[n]; falls back to scalar g:nuwiki_*
-  let l:ext  = get(g:, 'nuwiki_file_extension', '.wiki')
+" vars and finally to built-in defaults.
+function! s:wiki_cfg(n) abort
+  let l:w = {}
+  if exists('g:nuwiki_wikis') && len(g:nuwiki_wikis) > a:n
+    let l:w = g:nuwiki_wikis[a:n]
+  endif
+  let l:root  = expand(get(l:w, 'root',
+        \ get(g:, 'nuwiki_wiki_root', '~/vimwiki')))
+  let l:ext   = get(l:w, 'file_extension',
+        \ get(g:, 'nuwiki_file_extension', '.wiki'))
   if l:ext[0] !=# '.' | let l:ext = '.' . l:ext | endif
-  execute (a:tab ? 'tabedit' : 'edit') . ' ' . fnameescape(l:root . '/index' . l:ext)
+  let l:idx       = get(l:w, 'index', 'index')
+  let l:diary_rel = get(l:w, 'diary_rel_path',
+        \ get(g:, 'nuwiki_diary_rel_path', 'diary'))
+  let l:diary_idx = get(l:w, 'diary_index', 'diary')
+  return { 'root': l:root, 'ext': l:ext, 'idx': l:idx,
+        \  'diary_rel': l:diary_rel, 'diary_idx': l:diary_idx }
+endfunction
+
+function! nuwiki#commands#open_wiki_path(tab) abort
+  let l:c = s:wiki_cfg(0)
+  execute (a:tab ? 'tabedit' : 'edit') . ' '
+        \ . fnameescape(l:c.root . '/' . l:c.idx . l:c.ext)
 endfunction
 
 function! nuwiki#commands#open_diary_path(day_offset) abort
-  let l:root  = expand(get(g:, 'nuwiki_wiki_root', '~/vimwiki'))
+  let l:c    = s:wiki_cfg(0)
-  let l:ext   = get(g:, 'nuwiki_file_extension', '.wiki')
+  let l:date = strftime('%Y-%m-%d', localtime() + a:day_offset * 86400)
-  if l:ext[0] !=# '.' | let l:ext = '.' . l:ext | endif
+  execute 'edit ' . fnameescape(l:c.root . '/' . l:c.diary_rel
-  let l:diary = get(g:, 'nuwiki_diary_rel_path', 'diary')
+        \ . '/' . l:date . l:c.ext)
-  let l:date  = strftime('%Y-%m-%d', localtime() + a:day_offset * 86400)
-  execute 'edit ' . fnameescape(l:root . '/' . l:diary . '/' . l:date . l:ext)
 endfunction
 
 function! nuwiki#commands#open_diary_index_path() abort
-  let l:root  = expand(get(g:, 'nuwiki_wiki_root', '~/vimwiki'))
+  let l:c = s:wiki_cfg(0)
-  let l:ext   = get(g:, 'nuwiki_file_extension', '.wiki')
+  execute 'edit ' . fnameescape(l:c.root . '/' . l:c.diary_rel
-  if l:ext[0] !=# '.' | let l:ext = '.' . l:ext | endif
+        \ . '/' . l:c.diary_idx . l:c.ext)
-  let l:diary = get(g:, 'nuwiki_diary_rel_path', 'diary')
-  execute 'edit ' . fnameescape(l:root . '/' . l:diary . '/diary' . l:ext)
 endfunction
 
 " ===== List + heading editing =====

lua/nuwiki/init.lua

@@ -18,32 +18,48 @@ local function _open(path, open_cmd)
   vim.cmd((open_cmd or 'edit') .. ' ' .. vim.fn.fnameescape(vim.fn.expand(path)))
 end
 
+-- Return the config dict for wiki #n (0-based).
+-- Priority: setup() opts.wikis → g:nuwiki_wikis (VimL) → scalar opts/g: vars.
+local function _wiki_cfg(n)
+  local opts  = config.options
+  local wikis = opts.wikis
+                or (vim.g.nuwiki_wikis and vim.g.nuwiki_wikis or nil)
+  local w     = wikis and wikis[(n or 0) + 1] or nil
+  local root  = (w and w.root)
+                or opts.wiki_root
+                or vim.g.nuwiki_wiki_root
+                or '~/vimwiki'
+  local ext   = (w and w.file_extension)
+                or opts.file_extension
+                or vim.g.nuwiki_file_extension
+                or '.wiki'
+  if not ext:match('^%.') then ext = '.' .. ext end
+  return {
+    root      = root,
+    ext       = ext,
+    idx       = (w and w.index) or 'index',
+    diary_rel = (w and w.diary_rel_path)
+                or vim.g.nuwiki_diary_rel_path
+                or 'diary',
+    diary_idx = (w and w.diary_index) or 'diary',
+  }
+end
+
 -- Compute the wiki index path for wiki #n (0-based) from config.
 local function _wiki_index_path(n)
-  local opts = config.options
+  local c = _wiki_cfg(n)
-  local w   = opts.wikis and opts.wikis[(n or 0) + 1]
+  return c.root .. '/' .. c.idx .. c.ext
-  local root = (w and w.root) or opts.wiki_root or '~/vimwiki'
-  local idx  = (w and w.index) or 'index'
-  local ext  = (w and w.file_extension) or opts.file_extension or '.wiki'
-  if not ext:match('^%.') then ext = '.' .. ext end
-  return root .. '/' .. idx .. ext
 end
 
 -- Compute a diary file path from config. day_offset=0 → today.
--- Pass nil for the diary index file itself.
+-- Pass nil to get the diary index file instead.
 local function _diary_path(day_offset)
-  local opts = config.options
+  local c = _wiki_cfg(0)
-  local w    = opts.wikis and opts.wikis[1]
-  local root = (w and w.root) or opts.wiki_root or '~/vimwiki'
-  local rel  = (w and w.diary_rel_path) or 'diary'
-  local ext  = (w and w.file_extension) or opts.file_extension or '.wiki'
-  if not ext:match('^%.') then ext = '.' .. ext end
   if day_offset == nil then
-    local didx = (w and w.diary_index) or 'diary'
+    return c.root .. '/' .. c.diary_rel .. '/' .. c.diary_idx .. c.ext
-    return root .. '/' .. rel .. '/' .. didx .. ext
   end
   local t = os.time() + day_offset * 86400
-  return root .. '/' .. rel .. '/' .. os.date('%Y-%m-%d', t) .. ext
+  return c.root .. '/' .. c.diary_rel .. '/' .. os.date('%Y-%m-%d', t) .. c.ext
 end
 
 -- Register global (non-buffer-local) entry-point keymaps so users can open