allow signcolumn settings (#805)

README.md

@@ -90,7 +90,8 @@ require'nvim-tree'.setup {
       list = {}
     },
     number = false,
-    relativenumber = false
+    relativenumber = false,
+    signcolumn = "yes"
   },
   trash = {
     cmd = "trash",

doc/nvim-tree-lua.txt

@@ -112,6 +112,7 @@ function.
         auto_resize = false,
         number = false,
         relativenumber = false,
+	signcolumn = "yes"
         mappings = {
           custom_only = false,
           list = {}
@@ -303,6 +304,11 @@ Here is a list of the options available in the setup call:
       type: `boolean`
       default: false
 
+  - |view.signcolumn|: show diagnostic sign column. Value  can be `"yes"`,
+    `"auto"`, `"no"`
+      type: `string`
+      default: `"yes"`
+
   - |view.mappings|: configuration options for keymaps
 
     - |view.mappings.custom_only|: will use only the provided user mappings and not the default

lua/nvim-tree/view.lua

@@ -117,7 +117,8 @@ local DEFAULT_CONFIG = {
     list = {}
   },
   number = false,
-  relativenumber = false
+  relativenumber = false,
+  signcolumn = 'yes'
 }
 
 local function merge_mappings(user_mappings)
@@ -152,6 +153,7 @@ function M.setup(opts)
   M.View.auto_resize = opts.auto_resize
   M.View.winopts.number = options.number
   M.View.winopts.relativenumber = options.relativenumber
+  M.View.winopts.signcolumn = options.signcolumn
   if options.mappings.custom_only then
     M.View.mappings = options.mappings.list
   else