feat(renderer): add ability to set git icons in signcolumn (#1242)

lua/nvim-tree/renderer/builder.lua

@@ -14,6 +14,7 @@ function Builder.new(root_cwd)
     highlights = {},
     lines = {},
     markers = {},
+    signs = {},
     root_cwd = root_cwd,
   }, Builder)
 end
@@ -61,9 +62,11 @@ function Builder:configure_git_icons_padding(padding)
 end
 
 function Builder:configure_git_icons_placement(where)
-  where = where or "before"
-  self.is_git_before = where == "before"
-  self.is_git_after = not self.is_git_before
+  if where == "signcolumn" then
+    vim.fn.sign_unplace(git.SIGN_GROUP)
+    self.is_git_sign = true
+  end
+  self.is_git_after = where == "after" and not self.is_git_sign
   return self
 end
 
@@ -109,7 +112,7 @@ function Builder:_build_folder(node, padding, git_hl, git_icons_tbl)
 
   local foldername = name .. self.trailing_slash
   local git_icons = self:_unwrap_git_data(git_icons_tbl, offset + #icon + (self.is_git_after and #foldername + 1 or 0))
-  local fname_starts_at = offset + #icon + (self.is_git_before and #git_icons or 0)
+  local fname_starts_at = offset + #icon + (self.is_git_after and 0 or #git_icons)
   local line = self:_format_line(padding .. icon, foldername, git_icons)
   self:_insert_line(line)
 
@@ -226,6 +229,12 @@ function Builder:_build_line(tree, node, idx)
   local git_highlight = git.get_highlight(node)
   local git_icons_tbl = git.get_icons(node)
 
+  if self.is_git_sign and git_icons_tbl and #git_icons_tbl > 0 then
+    local git_info = git_icons_tbl[1]
+    table.insert(self.signs, { sign = git_info.hl, lnum = self.index + 1 })
+    git_icons_tbl = {}
+  end
+
   local is_folder = node.nodes ~= nil
   local is_symlink = node.link_to ~= nil
 
@@ -270,7 +279,7 @@ function Builder:build_header(show_header)
 end
 
 function Builder:unwrap()
-  return self.lines, self.highlights
+  return self.lines, self.highlights, self.signs
 end
 
 return Builder