From 35e74c3b4730129806b6edd85ea90991a2ddbca6 Mon Sep 17 00:00:00 2001
From: Bastian Ahrens <bahrens@compeon.de>
Date: Thu, 20 Apr 2023 12:05:40 +0200
Subject: [PATCH 1/6] feat: Allow for placement of diagnostic icons

Similar to the other icons there's now an option `diagnostic_placement`
that can either be "signcolumn" (default), "before" or "after".
---
 lua/nvim-tree.lua                  |  4 +-
 lua/nvim-tree/diagnostics.lua      | 78 +++++++++++-------------------
 lua/nvim-tree/renderer/builder.lua | 57 +++++++++++++++++-----
 lua/nvim-tree/renderer/init.lua    |  2 +-
 4 files changed, 78 insertions(+), 63 deletions(-)

diff --git a/lua/nvim-tree.lua b/lua/nvim-tree.lua
index d97f3c71d1d..ecec543da99 100644
--- a/lua/nvim-tree.lua
+++ b/lua/nvim-tree.lua
@@ -304,14 +304,14 @@ local function setup_autocommands(opts)
     create_nvim_tree_autocmd("DiagnosticChanged", {
       callback = function()
         log.line("diagnostics", "DiagnosticChanged")
-        require("nvim-tree.diagnostics").update()
+        reloaders.reload_explorer()
       end,
     })
     create_nvim_tree_autocmd("User", {
       pattern = "CocDiagnosticChange",
       callback = function()
         log.line("diagnostics", "CocDiagnosticChange")
-        require("nvim-tree.diagnostics").update()
+        reloaders.reload_explorer()
       end,
     })
   end
diff --git a/lua/nvim-tree/diagnostics.lua b/lua/nvim-tree/diagnostics.lua
index 95f76031472..ef47d468fc8 100644
--- a/lua/nvim-tree/diagnostics.lua
+++ b/lua/nvim-tree/diagnostics.lua
@@ -15,7 +15,15 @@ local sign_names = {
   { "NvimTreeSignHint", "NvimTreeLspDiagnosticsHint" },
 }
 
-local function add_sign(linenr, severity)
+function M.get_sign(severity)
+  if not severity then
+    return nil
+  end
+
+  return M.diagnostic_icons[severity]
+end
+
+function M.add_sign(linenr, severity)
   local buf = view.get_bufnr()
   if not vim.api.nvim_buf_is_valid(buf) or not vim.api.nvim_buf_is_loaded(buf) then
     return
@@ -86,53 +94,16 @@ function M.clear()
   vim.fn.sign_unplace(GROUP)
 end
 
-function M.update()
+function M.get_diagnostics()
   if not M.enable or not core.get_explorer() or not view.is_buf_valid(view.get_bufnr()) then
-    return
+    return {}
   end
-  utils.debounce("diagnostics", M.debounce_delay, function()
-    local profile = log.profile_start "diagnostics update"
-    log.line("diagnostics", "update")
-
-    local buffer_severity
-    if is_using_coc() then
-      buffer_severity = from_coc()
-    else
-      buffer_severity = from_nvim_lsp()
-    end
 
-    M.clear()
-
-    local nodes_by_line = utils.get_nodes_by_line(core.get_explorer().nodes, core.get_nodes_starting_line())
-    for _, node in pairs(nodes_by_line) do
-      node.diag_status = nil
-    end
-
-    for bufname, severity in pairs(buffer_severity) do
-      local bufpath = utils.canonical_path(bufname)
-      log.line("diagnostics", " bufpath '%s' severity %d", bufpath, severity)
-      if 0 < severity and severity < 5 then
-        for line, node in pairs(nodes_by_line) do
-          local nodepath = utils.canonical_path(node.absolute_path)
-          log.line("diagnostics", "  %d checking nodepath '%s'", line, nodepath)
-          if
-            M.show_on_dirs
-            and vim.startswith(bufpath:gsub("\\", "/"), nodepath:gsub("\\", "/") .. "/")
-            and (not node.open or M.show_on_open_dirs)
-          then
-            log.line("diagnostics", " matched fold node '%s'", node.absolute_path)
-            node.diag_status = severity
-            add_sign(line, severity)
-          elseif nodepath == bufpath then
-            log.line("diagnostics", " matched file node '%s'", node.absolute_path)
-            node.diag_status = severity
-            add_sign(line, severity)
-          end
-        end
-      end
-    end
-    log.profile_end(profile)
-  end)
+  if is_using_coc() then
+    return from_coc()
+  else
+    return from_nvim_lsp()
+  end
 end
 
 local links = {
@@ -146,6 +117,19 @@ function M.setup(opts)
   M.enable = opts.diagnostics.enable
   M.debounce_delay = opts.diagnostics.debounce_delay
   M.severity = opts.diagnostics.severity
+  M.diagnostic_icons = {
+    { str = opts.diagnostics.icons.error, hl = sign_names[1][2] },
+    { str = opts.diagnostics.icons.warning, hl = sign_names[2][2] },
+    { str = opts.diagnostics.icons.info, hl = sign_names[3][2] },
+    { str = opts.diagnostics.icons.hint, hl = sign_names[4][2] },
+  }
+
+  if opts.renderer.icons.diagnostic_placement == "signcolumn" then
+    vim.fn.sign_define(sign_names[1][1], { text = opts.diagnostics.icons.error, texthl = sign_names[1][2] })
+    vim.fn.sign_define(sign_names[2][1], { text = opts.diagnostics.icons.warning, texthl = sign_names[2][2] })
+    vim.fn.sign_define(sign_names[3][1], { text = opts.diagnostics.icons.info, texthl = sign_names[3][2] })
+    vim.fn.sign_define(sign_names[4][1], { text = opts.diagnostics.icons.hint, texthl = sign_names[4][2] })
+  end
 
   if M.enable then
     log.line("diagnostics", "setup")
@@ -153,10 +137,6 @@ function M.setup(opts)
 
   M.show_on_dirs = opts.diagnostics.show_on_dirs
   M.show_on_open_dirs = opts.diagnostics.show_on_open_dirs
-  vim.fn.sign_define(sign_names[1][1], { text = opts.diagnostics.icons.error, texthl = sign_names[1][2] })
-  vim.fn.sign_define(sign_names[2][1], { text = opts.diagnostics.icons.warning, texthl = sign_names[2][2] })
-  vim.fn.sign_define(sign_names[3][1], { text = opts.diagnostics.icons.info, texthl = sign_names[3][2] })
-  vim.fn.sign_define(sign_names[4][1], { text = opts.diagnostics.icons.hint, texthl = sign_names[4][2] })
 
   for lhs, rhs in pairs(links) do
     vim.cmd("hi def link " .. lhs .. " " .. rhs)
diff --git a/lua/nvim-tree/renderer/builder.lua b/lua/nvim-tree/renderer/builder.lua
index 04e0ec48f62..f95298aba81 100644
--- a/lua/nvim-tree/renderer/builder.lua
+++ b/lua/nvim-tree/renderer/builder.lua
@@ -1,6 +1,7 @@
 local utils = require "nvim-tree.utils"
 local core = require "nvim-tree.core"
 
+local diagnostics = require "nvim-tree.diagnostics"
 local git = require "nvim-tree.renderer.components.git"
 local pad = require "nvim-tree.renderer.components.padding"
 local icons = require "nvim-tree.renderer.components.icons"
@@ -72,6 +73,14 @@ function Builder:configure_git_icons_placement(where)
   return self
 end
 
+function Builder:configure_diagnostic_icons_placement(where)
+  if where ~= "after" and where ~= "before" and where ~= "signcolumn" then
+    where = "signcolumn" -- default before
+  end
+  self.diagnostic_placement = where
+  return self
+end
+
 function Builder:configure_modified_placement(where)
   if where ~= "after" and where ~= "before" and where ~= "signcolumn" then
     where = "after" -- default after
@@ -225,6 +234,20 @@ function Builder:_get_modified_icon(node)
   return modified_icon
 end
 
+---@param node table
+---@return HighlightedString|nil icon
+function Builder:_get_diagnostic_icon(node, diagnostic_severity)
+  local diagnostic_icon = diagnostics.get_sign(diagnostic_severity)
+
+  if self.diagnostic_placement == "signcolumn" and diagnostic_severity then
+    node.diag_status = diagnostic_severity
+    diagnostics.add_sign(self.index + 1, diagnostic_severity)
+    diagnostic_icon = nil
+  end
+
+  return diagnostic_icon
+end
+
 ---@param node table
 ---@return string icon_highlight, string name_highlight
 function Builder:_get_highlight_override(node, unloaded_bufnr)
@@ -272,9 +295,9 @@ end
 ---@param git_icons HighlightedString[]|nil
 ---@param modified_icon HighlightedString|nil
 ---@return HighlightedString[]
-function Builder:_format_line(padding, icon, name, git_icons, modified_icon)
+function Builder:_format_line(padding, icon, name, git_icons, modified_icon, diagnostic_icon)
   local added_len = 0
-  local function add_to_end(t1, t2)
+  local function append_to_line(t1, t2)
     for _, v in ipairs(t2) do
       if added_len > 0 then
         table.insert(t1, { str = self.icon_padding })
@@ -291,29 +314,39 @@ function Builder:_format_line(padding, icon, name, git_icons, modified_icon)
   end
 
   local line = { padding }
-  add_to_end(line, { icon })
+  append_to_line(line, { icon })
+
   if git_icons and self.git_placement == "before" then
-    add_to_end(line, git_icons)
+    append_to_line(line, git_icons)
   end
   if modified_icon and self.modified_placement == "before" then
-    add_to_end(line, { modified_icon })
+    append_to_line(line, { modified_icon })
   end
-  add_to_end(line, { name })
+  if diagnostic_icon and self.diagnostic_placement == "before" then
+    append_to_line(line, { diagnostic_icon })
+  end
+
+  append_to_line(line, { name })
+
   if git_icons and self.git_placement == "after" then
-    add_to_end(line, git_icons)
+    append_to_line(line, git_icons)
   end
   if modified_icon and self.modified_placement == "after" then
-    add_to_end(line, { modified_icon })
+    append_to_line(line, { modified_icon })
+  end
+  if diagnostic_icon and self.diagnostic_placement == "after" then
+    append_to_line(line, { diagnostic_icon })
   end
 
   return line
 end
 
-function Builder:_build_line(node, idx, num_children, unloaded_bufnr)
+function Builder:_build_line(node, idx, num_children, unloaded_bufnr, diagnostic_severity)
   -- various components
   local padding = pad.get_padding(self.depth, idx, num_children, node, self.markers)
   local git_icons = self:_get_git_icons(node)
   local modified_icon = self:_get_modified_icon(node)
+  local diagnostic_icon = self:_get_diagnostic_icon(node, diagnostic_severity)
 
   -- main components
   local is_folder = node.nodes ~= nil
@@ -336,7 +369,7 @@ function Builder:_build_line(node, idx, num_children, unloaded_bufnr)
     name.hl = name_hl
   end
 
-  local line = self:_format_line(padding, icon, name, git_icons, modified_icon)
+  local line = self:_format_line(padding, icon, name, git_icons, modified_icon, diagnostic_icon)
   self:_insert_line(self:_unwrap_highlighted_strings(line))
 
   self.index = self.index + 1
@@ -364,10 +397,12 @@ end
 
 function Builder:build(tree, unloaded_bufnr)
   local num_children = self:_get_nodes_number(tree.nodes)
+  local _diagnostics = diagnostics.get_diagnostics()
   local idx = 1
   for _, node in ipairs(tree.nodes) do
     if not node.hidden then
-      self:_build_line(node, idx, num_children, unloaded_bufnr)
+      local nodepath = utils.canonical_path(node.absolute_path)
+      self:_build_line(node, idx, num_children, unloaded_bufnr, _diagnostics[nodepath])
       idx = idx + 1
     end
   end
diff --git a/lua/nvim-tree/renderer/init.lua b/lua/nvim-tree/renderer/init.lua
index 3a61adcf240..7d4d1f443b4 100644
--- a/lua/nvim-tree/renderer/init.lua
+++ b/lua/nvim-tree/renderer/init.lua
@@ -68,6 +68,7 @@ function M.draw(unloaded_bufnr)
     :configure_modified_highlighting(M.config.highlight_modified)
     :configure_icon_padding(M.config.icons.padding)
     :configure_git_icons_placement(M.config.icons.git_placement)
+    :configure_diagnostic_icons_placement(M.config.icons.diagnostic_placement)
     :configure_modified_placement(M.config.icons.modified_placement)
     :configure_symlink_destination(M.config.symlink_destination)
     :configure_filter(live_filter.filter, live_filter.prefix)
@@ -83,7 +84,6 @@ function M.draw(unloaded_bufnr)
     vim.api.nvim_win_set_cursor(view.get_winnr(), cursor)
   end
 
-  diagnostics.update()
   marks.draw()
 
   view.grow_from_content()

From 016640f78996d975409985db727bafecca0c52f4 Mon Sep 17 00:00:00 2001
From: Bastian Ahrens <bahrens@compeon.de>
Date: Thu, 20 Apr 2023 12:34:27 +0200
Subject: [PATCH 2/6] fix: Add default diagnostic_placement option

---
 lua/nvim-tree.lua | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lua/nvim-tree.lua b/lua/nvim-tree.lua
index ecec543da99..9f8b5c53320 100644
--- a/lua/nvim-tree.lua
+++ b/lua/nvim-tree.lua
@@ -406,6 +406,7 @@ local DEFAULT_OPTS = { -- BEGIN_DEFAULT_OPTS
     },
     icons = {
       webdev_colors = true,
+      diagnostic_placement = "signcolumn",
       git_placement = "before",
       modified_placement = "after",
       padding = " ",

From 6f309c44e5765c0785aed7130f357524de1b798a Mon Sep 17 00:00:00 2001
From: Bastian Ahrens <bahrens@compeon.de>
Date: Thu, 20 Apr 2023 12:34:43 +0200
Subject: [PATCH 3/6] fix: Linting

---
 lua/nvim-tree/diagnostics.lua      | 1 -
 lua/nvim-tree/renderer/builder.lua | 2 +-
 lua/nvim-tree/renderer/init.lua    | 1 -
 3 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/lua/nvim-tree/diagnostics.lua b/lua/nvim-tree/diagnostics.lua
index ef47d468fc8..e375d2686c5 100644
--- a/lua/nvim-tree/diagnostics.lua
+++ b/lua/nvim-tree/diagnostics.lua
@@ -1,4 +1,3 @@
-local utils = require "nvim-tree.utils"
 local view = require "nvim-tree.view"
 local core = require "nvim-tree.core"
 local log = require "nvim-tree.log"
diff --git a/lua/nvim-tree/renderer/builder.lua b/lua/nvim-tree/renderer/builder.lua
index f95298aba81..a8c8e4aa66e 100644
--- a/lua/nvim-tree/renderer/builder.lua
+++ b/lua/nvim-tree/renderer/builder.lua
@@ -75,7 +75,7 @@ end
 
 function Builder:configure_diagnostic_icons_placement(where)
   if where ~= "after" and where ~= "before" and where ~= "signcolumn" then
-    where = "signcolumn" -- default before
+    where = "signcolumn"
   end
   self.diagnostic_placement = where
   return self
diff --git a/lua/nvim-tree/renderer/init.lua b/lua/nvim-tree/renderer/init.lua
index 7d4d1f443b4..9363e6bfce0 100644
--- a/lua/nvim-tree/renderer/init.lua
+++ b/lua/nvim-tree/renderer/init.lua
@@ -1,5 +1,4 @@
 local core = require "nvim-tree.core"
-local diagnostics = require "nvim-tree.diagnostics"
 local log = require "nvim-tree.log"
 local view = require "nvim-tree.view"
 local modified = require "nvim-tree.renderer.components.modified"

From 52ea93eab9d3ed8e564fe32a4f765715277b28d5 Mon Sep 17 00:00:00 2001
From: Bastian Ahrens <bahrens@compeon.de>
Date: Mon, 24 Apr 2023 21:03:24 +0200
Subject: [PATCH 4/6] fix: Redraw the tree on diagnostic change

Also make sure the diagnostics are cleared correctly
---
 lua/nvim-tree.lua                  | 4 ++--
 lua/nvim-tree/renderer/builder.lua | 9 +++++++--
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/lua/nvim-tree.lua b/lua/nvim-tree.lua
index 9f8b5c53320..911a84a4e6d 100644
--- a/lua/nvim-tree.lua
+++ b/lua/nvim-tree.lua
@@ -304,14 +304,14 @@ local function setup_autocommands(opts)
     create_nvim_tree_autocmd("DiagnosticChanged", {
       callback = function()
         log.line("diagnostics", "DiagnosticChanged")
-        reloaders.reload_explorer()
+        require("nvim-tree.renderer").draw()
       end,
     })
     create_nvim_tree_autocmd("User", {
       pattern = "CocDiagnosticChange",
       callback = function()
         log.line("diagnostics", "CocDiagnosticChange")
-        reloaders.reload_explorer()
+        require("nvim-tree.renderer").draw()
       end,
     })
   end
diff --git a/lua/nvim-tree/renderer/builder.lua b/lua/nvim-tree/renderer/builder.lua
index a8c8e4aa66e..8e8146174c7 100644
--- a/lua/nvim-tree/renderer/builder.lua
+++ b/lua/nvim-tree/renderer/builder.lua
@@ -397,12 +397,17 @@ end
 
 function Builder:build(tree, unloaded_bufnr)
   local num_children = self:_get_nodes_number(tree.nodes)
-  local _diagnostics = diagnostics.get_diagnostics()
+  local all_diagnostics = diagnostics.get_diagnostics()
+
+  if self.diagnostic_placement == "signcolumn" then
+    diagnostics.clear()
+  end
+
   local idx = 1
   for _, node in ipairs(tree.nodes) do
     if not node.hidden then
       local nodepath = utils.canonical_path(node.absolute_path)
-      self:_build_line(node, idx, num_children, unloaded_bufnr, _diagnostics[nodepath])
+      self:_build_line(node, idx, num_children, unloaded_bufnr, all_diagnostics[nodepath])
       idx = idx + 1
     end
   end

From 29ff2c302b17be25992ce86bde1b5fef87b9b6bd Mon Sep 17 00:00:00 2001
From: Bastian Ahrens <bahrens@compeon.de>
Date: Mon, 24 Apr 2023 22:25:45 +0200
Subject: [PATCH 5/6] feat: Add diagnostics signs for folders

---
 lua/nvim-tree/diagnostics.lua      |  3 ---
 lua/nvim-tree/renderer/builder.lua | 38 +++++++++++++++++++++++++-----
 lua/nvim-tree/renderer/init.lua    |  3 +++
 3 files changed, 35 insertions(+), 9 deletions(-)

diff --git a/lua/nvim-tree/diagnostics.lua b/lua/nvim-tree/diagnostics.lua
index e375d2686c5..cca11378247 100644
--- a/lua/nvim-tree/diagnostics.lua
+++ b/lua/nvim-tree/diagnostics.lua
@@ -134,9 +134,6 @@ function M.setup(opts)
     log.line("diagnostics", "setup")
   end
 
-  M.show_on_dirs = opts.diagnostics.show_on_dirs
-  M.show_on_open_dirs = opts.diagnostics.show_on_open_dirs
-
   for lhs, rhs in pairs(links) do
     vim.cmd("hi def link " .. lhs .. " " .. rhs)
   end
diff --git a/lua/nvim-tree/renderer/builder.lua b/lua/nvim-tree/renderer/builder.lua
index 8e8146174c7..848130caba1 100644
--- a/lua/nvim-tree/renderer/builder.lua
+++ b/lua/nvim-tree/renderer/builder.lua
@@ -24,6 +24,16 @@ function Builder.new(root_cwd)
   }, Builder)
 end
 
+function Builder:configure_show_on_open_dirs(show_on_open_dirs)
+  self.show_on_open_dirs = show_on_open_dirs
+  return self
+end
+
+function Builder:configure_show_on_dirs(show_on_dirs)
+  self.show_on_dirs = show_on_dirs
+  return self
+end
+
 function Builder:configure_root_label(root_folder_label)
   self.root_folder_label = root_folder_label or DEFAULT_ROOT_FOLDER_LABEL
   return self
@@ -237,15 +247,13 @@ end
 ---@param node table
 ---@return HighlightedString|nil icon
 function Builder:_get_diagnostic_icon(node, diagnostic_severity)
-  local diagnostic_icon = diagnostics.get_sign(diagnostic_severity)
-
   if self.diagnostic_placement == "signcolumn" and diagnostic_severity then
     node.diag_status = diagnostic_severity
     diagnostics.add_sign(self.index + 1, diagnostic_severity)
-    diagnostic_icon = nil
+    return nil
   end
 
-  return diagnostic_icon
+  return diagnostics.get_sign(diagnostic_severity)
 end
 
 ---@param node table
@@ -397,17 +405,35 @@ end
 
 function Builder:build(tree, unloaded_bufnr)
   local num_children = self:_get_nodes_number(tree.nodes)
-  local all_diagnostics = diagnostics.get_diagnostics()
+  local diagnostic_severities_by_path = diagnostics.get_diagnostics()
 
   if self.diagnostic_placement == "signcolumn" then
     diagnostics.clear()
   end
 
   local idx = 1
+
   for _, node in ipairs(tree.nodes) do
     if not node.hidden then
+      local is_folder = node.nodes ~= nil
       local nodepath = utils.canonical_path(node.absolute_path)
-      self:_build_line(node, idx, num_children, unloaded_bufnr, all_diagnostics[nodepath])
+
+      local severity = nil
+      if is_folder then
+        for bufname, buf_severity in pairs(diagnostic_severities_by_path) do
+          local bufpath = utils.canonical_path(bufname)
+          if
+            self.show_on_dirs
+            and vim.startswith(bufpath:gsub("\\", "/"), nodepath:gsub("\\", "/") .. "/")
+            and (not node.open or self.show_on_open_dirs)
+          then
+            severity = buf_severity
+          end
+        end
+      elseif diagnostic_severities_by_path[nodepath] then
+        severity = diagnostic_severities_by_path[nodepath]
+      end
+      self:_build_line(node, idx, num_children, unloaded_bufnr, severity)
       idx = idx + 1
     end
   end
diff --git a/lua/nvim-tree/renderer/init.lua b/lua/nvim-tree/renderer/init.lua
index 9363e6bfce0..ca4a7a65905 100644
--- a/lua/nvim-tree/renderer/init.lua
+++ b/lua/nvim-tree/renderer/init.lua
@@ -68,6 +68,8 @@ function M.draw(unloaded_bufnr)
     :configure_icon_padding(M.config.icons.padding)
     :configure_git_icons_placement(M.config.icons.git_placement)
     :configure_diagnostic_icons_placement(M.config.icons.diagnostic_placement)
+    :configure_show_on_dirs(M.config.diagnostics.show_on_dirs)
+    :configure_show_on_open_dirs(M.config.diagnostics.show_on_open_dirs)
     :configure_modified_placement(M.config.icons.modified_placement)
     :configure_symlink_destination(M.config.symlink_destination)
     :configure_filter(live_filter.filter, live_filter.prefix)
@@ -92,6 +94,7 @@ end
 
 function M.setup(opts)
   M.config = opts.renderer
+  M.config.diagnostics = opts.diagnostics
   M.config.modified = opts.modified
 
   _padding.setup(opts)

From aa597b4ec97af1f71ee44df05d38046c0f461f15 Mon Sep 17 00:00:00 2001
From: Bastian Ahrens <bahrens@compeon.de>
Date: Mon, 24 Apr 2023 22:36:04 +0200
Subject: [PATCH 6/6] feat: Add profiling to diagnostic update

---
 lua/nvim-tree/renderer/builder.lua | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lua/nvim-tree/renderer/builder.lua b/lua/nvim-tree/renderer/builder.lua
index 848130caba1..7b24130f869 100644
--- a/lua/nvim-tree/renderer/builder.lua
+++ b/lua/nvim-tree/renderer/builder.lua
@@ -1,6 +1,7 @@
 local utils = require "nvim-tree.utils"
 local core = require "nvim-tree.core"
 
+local log = require "nvim-tree.log"
 local diagnostics = require "nvim-tree.diagnostics"
 local git = require "nvim-tree.renderer.components.git"
 local pad = require "nvim-tree.renderer.components.padding"
@@ -413,6 +414,8 @@ function Builder:build(tree, unloaded_bufnr)
 
   local idx = 1
 
+  local profile = log.profile_start "diagnostic update"
+  log.line("diagnostics", "update")
   for _, node in ipairs(tree.nodes) do
     if not node.hidden then
       local is_folder = node.nodes ~= nil
@@ -422,21 +425,25 @@ function Builder:build(tree, unloaded_bufnr)
       if is_folder then
         for bufname, buf_severity in pairs(diagnostic_severities_by_path) do
           local bufpath = utils.canonical_path(bufname)
+          log.line("diagnostics", " %d checking nodepath '%s'", idx, nodepath)
           if
             self.show_on_dirs
             and vim.startswith(bufpath:gsub("\\", "/"), nodepath:gsub("\\", "/") .. "/")
             and (not node.open or self.show_on_open_dirs)
           then
+            log.line("diagnostics", " matched folder node '%s'", nodepath)
             severity = buf_severity
           end
         end
       elseif diagnostic_severities_by_path[nodepath] then
+        log.line("diagnostics", " matched file node '%s'", nodepath)
         severity = diagnostic_severities_by_path[nodepath]
       end
       self:_build_line(node, idx, num_children, unloaded_bufnr, severity)
       idx = idx + 1
     end
   end
+  log.profile_end(profile)
 
   return self
 end