feat(vim.ui.open): support lemonade #30845

runtime/doc/news.txt

@@ -240,6 +240,10 @@ UI
   which controls the tool used to open the given path or URL. If you want to
   globally set this, you can override vim.ui.open using the same approach
   described at |vim.paste()|.
+- `vim.ui.open()` now supports
+  [lemonade](https://github.com/lemonade-command/lemonade) as an option for
+  opening urls/files. This is handy if you are in an ssh connection and use
+  `lemonade`.
 • The |ins-completion-menu| now supports cascading highlight styles.
   |hl-PmenuSel| and |hl-PmenuMatch| both inherit from |hl-Pmenu|, and
   |hl-PmenuMatchSel| inherits highlights from both |hl-PmenuSel| and

runtime/lua/vim/ui.lua

@@ -159,8 +159,10 @@ function M.open(path, opt)
     cmd = { 'wslview', path }
   elseif vim.fn.executable('explorer.exe') == 1 then
     cmd = { 'explorer.exe', path }
+  elseif vim.fn.executable('lemonade') == 1 then
+    cmd = { 'lemonade', 'open', path }
   else
-    return nil, 'vim.ui.open: no handler found (tried: wslview, explorer.exe, xdg-open)'
+    return nil, 'vim.ui.open: no handler found (tried: wslview, explorer.exe, xdg-open, lemonade)'
   end
 
   return vim.system(cmd, job_opt), nil

test/functional/lua/ui_spec.lua

@@ -153,7 +153,7 @@ describe('vim.ui', function()
         vim.fn.executable = function() return 0 end
       ]]
       eq(
-        'vim.ui.open: no handler found (tried: wslview, explorer.exe, xdg-open)',
+        'vim.ui.open: no handler found (tried: wslview, explorer.exe, xdg-open, lemonade)',
         exec_lua [[local _, err = vim.ui.open('foo') ; return err]]
       )
     end)