handle multiple code action commands

Handle multiple code action commands that are being returned when trying
to use refactor.rewrite for fillstruct when the struct being filled
results in gopls providing that commannd and a command to split the line
into multiple lines.

autoload/go/lsp.vim

@@ -1639,7 +1639,7 @@ function! go#lsp#Imports() abort
   let l:lsp = s:lspfactory.get()
 
   let l:state = s:newHandlerState('')
-  let l:handler = go#promise#New(function('s:handleCodeAction', ['source.organizeImports', ''], l:state), 10000, '')
+  let l:handler = go#promise#New(function('s:handleCodeAction', ['source.organizeImports', '', ''], l:state), 10000, '')
   let l:state.handleResult = l:handler.wrapper
   let l:state.error = l:handler.wrapper
   let l:state.handleError = function('s:handleCodeActionError', [l:fname], l:state)
@@ -1663,7 +1663,7 @@ function! go#lsp#FillStruct() abort
   let l:lsp = s:lspfactory.get()
 
   let l:state = s:newHandlerState('')
-  let l:handler = go#promise#New(function('s:handleCodeAction', ['refactor.rewrite', 'apply_fix'], l:state), 10000, '')
+  let l:handler = go#promise#New(function('s:handleCodeAction', ['refactor.rewrite', 'apply_fix', 'fillstruct'], l:state), 10000, '')
   let l:state.handleResult = l:handler.wrapper
   let l:state.error = l:handler.wrapper
   let l:state.handleError = function('s:handleCodeActionError', [l:fname], l:state)
@@ -1689,7 +1689,7 @@ function! go#lsp#Extract(line1, line2) abort
   let l:lsp = s:lspfactory.get()
 
   let l:state = s:newHandlerState('')
-  let l:handler = go#promise#New(function('s:handleCodeAction', ['refactor.extract', 'apply_fix'], l:state), 10000, '')
+  let l:handler = go#promise#New(function('s:handleCodeAction', ['refactor.extract', 'apply_fix', ''], l:state), 10000, '')
   let l:state.handleResult = l:handler.wrapper
   let l:state.error = l:handler.wrapper
   let l:state.handleError = function('s:handleCodeActionError', [l:fname], l:state)
@@ -1818,7 +1818,7 @@ function! s:handleFormat(msg) abort dict
   call s:applyTextEdits(bufnr(''), a:msg)
 endfunction
 
-function! s:handleCodeAction(kind, cmd, msg) abort dict
+function! s:handleCodeAction(kind, cmd, fix, msg) abort dict
   if type(a:msg) is type('')
     call self.handleError(a:msg)
     return
@@ -1829,14 +1829,19 @@ function! s:handleCodeAction(kind, cmd, msg) abort dict
   endif
 
   for l:item in a:msg
-    if get(l:item, 'kind', '') is a:kind
+    " TODO(bc): always pass in exactly the right kind and remove the fix
+    " paramter entirely after
+    " https://github.com/golang/go/issues/68791 is merged and released.
+    if get(l:item, 'kind', '') is a:kind || l:item.kind is printf('%s.%s', kind, fix)
       if has_key(l:item, 'disabled') && get(l:item.disabled, 'reason', '') isnot ''
         call go#util#EchoWarning(printf('code action is disabled: %s', l:item.disabled.reason))
         continue
       endif
 
       if has_key(l:item, 'command')
-        if has_key(l:item.command, 'command') && (l:item.command.command is a:cmd || l:item.command.command is printf('gopls.%s', a:cmd))
+        if has_key(l:item['command'], 'command') &&
+            (l:item.command.command is a:cmd ||
+             (l:item.command.command is printf('gopls.%s', a:cmd) && (a:fix is '' || (has_key(l:item.command.arguments, 'Fix') && a:fix == l:item.command.arguments.Fix))))
           call s:executeCommand(l:item.command.command, l:item.command.arguments)
           continue
         endif