doesn't correctly initialize on windows

[prabirshrestha]

Wrong root path for windows. file:// contains two slashes instead of three.

langserver-go: reading on stdin, writing on stdout
--> request #1: initialize: {"capabilities":{},"rootPath":"file://C:/Users/prabir/go/src/github.com/prabirshrestha/del256"}
<-- error #1: initialize: {"code":0,"message":"invalid root path \"file://C:/Users/prabir/go/src/github.com/prabirshrestha/del256\": must be file:/// URI","data":null}

I think there is also another bug in go-langserver on windows where it doesn't normalize the path correctly. On windows it uses backslash instead of forward slash. Once this is fixed I will file a bug on go-langserver repo

[tjdevries]

It appears t he problem is that on Windows it doesn't have triple slashes. I think the last backslash is escaping the ".

I will investigate this one later. If you want to see if you can fix the langserver#util#get_uri function for windows, that'd be great. I assume that's what is causing the problem. (At least I think that's the function. I can look more later if that doesn't seem correct.)

[prabirshrestha]

It does seem to start if I manually add / for windows.

But then if I don't have set shellslash seems to use \\.

langserver-go: reading on stdin, writing on stdout
--> request #1: initialize: {"capabilities":{},"rootPath":"file:///C:\\Users\\prshrest\\go\\src\\github.com\\prabirshrestha\\del256"}
<-- result #1: initialize: {"capabilities":{"textDocumentSync":1,"hoverProvider":true,"definitionProvider":true,"referencesProvider":true,"documentSymbolProvider":true,"workspaceSymbolProvider":true}}

Here is the patch to correctly start it on windows.

--- a/autoload/langserver/util.vim
+++ b/autoload/langserver/util.vim
@@ -13,7 +13,11 @@ let s:diagnostic_severity = {
 ""
 " Get a uri from a filename
 function! langserver#util#get_uri(name, filename) abort
-  return 'file://' . a:filename
+  if has('win32') || has('win64')
+    return 'file:///' . substitute(a:filename, '\', '/', 'g')
+  else
+    return 'file://' . a:filename
+  endif
 endfunction

 ""

langserver-go: reading on stdin, writing on stdout
--> request #1: initialize: {"capabilities":{},"rootPath":"file:///C:/Users/prabir/go/src/github.com/prabirshrestha/del256"}
<-- result #1: initialize: {"capabilities":{"textDocumentSync":1,"hoverProvider":true,"definitionProvider":true,"referencesProvider":true,"documentSymbolProvider":true,"workspaceSymbolProvider":true}}

[prabirshrestha]

Fixed by https://github.com/tjdevries/nvim-langserver-shim/pull/14