Merge pull request #2203 from sbromberger/sbromberger/suppress-logging

adds options to suppress/customize delve logging; closes #2200

autoload/go/config.vim

@@ -210,6 +210,10 @@ function! go#config#DebugCommands() abort
   return g:go_debug_commands
 endfunction
 
+function! go#config#DebugLogOutput() abort
+  return get(g:, 'go_debug_log_output', 'debugger, rpc')
+endfunction
+
 function! go#config#LspLog() abort
   " make sure g:go_lsp_log is set so that it can be added to easily.
   let g:go_lsp_log = get(g:, 'go_lsp_log', [])

autoload/go/debug.vim

@@ -617,16 +617,20 @@ function! go#debug#Start(is_test, ...) abort
       let l:args = ['--'] + a:000[1:]
     endif
 
+    let l:debugLogOutput = go#config#DebugLogOutput()
+    let l:shouldLog = debugLogOutput isnot '' ? 1 : 0
     let l:cmd = [
           \ dlv,
           \ (a:is_test ? 'test' : 'debug'),
           \ l:pkgname,
           \ '--output', tempname(),
           \ '--headless',
           \ '--api-version', '2',
-          \ '--log', '--log-output', 'debugger,rpc',
           \ '--listen', go#config#DebugAddress(),
     \]
+    if shouldLog
+      let cmd += ['--log', '--log-output', debugLogOutput]
+    endif
 
     let buildtags = go#config#BuildTags()
     if buildtags isnot ''

doc/vim-go.txt

@@ -2153,6 +2153,16 @@ Defaults to `127.0.0.1:8181`:
   let g:go_debug_address = '127.0.0.1:8181'
 <
 
+                                                     *'g:go_debug_log_output'*
+
+Specifies log output options for `dlv`. Value should be a single string 
+of comma-separated options suitable for passing to `dlv`.  An empty string 
+(`''`) will suppress logging entirely.
+Default: `'debugger, rpc'`:
+>
+  let g:go_debug_log = 'debugger, rpc'
+<
+
                                                      *'g:go_highlight_debug'*
 
 Highlight the current line and breakpoints in the debugger.