fix(diagnostic): escape special chars in file names (#16527)

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Co-authored-by: Gregory Anders <greg@gpanders.com>

2 files changed, 27 insertions, 2 deletions

diff --git a/runtime/lua/vim/diagnostic.lua b/runtime/lua/vim/diagnostic.lua
index 708ee1727a..2973f293f3 100644
--- a/runtime/lua/vim/diagnostic.lua
+++ b/runtime/lua/vim/diagnostic.lua
@@ -658,7 +658,10 @@ function M.set(namespace, bufnr, diagnostics, opts)
 
   vim.api.nvim_buf_call(bufnr, function()
     vim.api.nvim_command(
-      string.format("doautocmd <nomodeline> DiagnosticChanged %s", vim.api.nvim_buf_get_name(bufnr))
+      string.format(
+        "doautocmd <nomodeline> DiagnosticChanged %s",
+        vim.fn.fnameescape(vim.api.nvim_buf_get_name(bufnr))
+      )
     )
   end)
 end
@@ -1333,7 +1336,7 @@ function M.reset(namespace, bufnr)
   end
 
   vim.api.nvim_command(
-      string.format("doautocmd <nomodeline> DiagnosticChanged %s", vim.api.nvim_buf_get_name(bufnr))
+      string.format("doautocmd <nomodeline> DiagnosticChanged %s", vim.fn.fnameescape(vim.api.nvim_buf_get_name(bufnr)))
   )
 end
 
diff --git a/test/functional/lua/diagnostic_spec.lua b/test/functional/lua/diagnostic_spec.lua
index 927ee8060d..eeb9316b06 100644
--- a/test/functional/lua/diagnostic_spec.lua
+++ b/test/functional/lua/diagnostic_spec.lua
@@ -1918,5 +1918,27 @@ describe('vim.diagnostic', function()
         return {show_called, hide_called}
       ]])
     end)
+
+    it('triggers the autocommand when diagnostics are set', function()
+      eq(1, exec_lua [[
+        vim.g.diagnostic_autocmd_triggered = 0
+        vim.cmd('autocmd DiagnosticChanged * let g:diagnostic_autocmd_triggered = 1')
+        vim.api.nvim_buf_set_name(diagnostic_bufnr, "test | test")
+        vim.diagnostic.set(diagnostic_ns, diagnostic_bufnr, {
+          make_error('Diagnostic', 0, 0, 0, 0)
+        })
+        return vim.g.diagnostic_autocmd_triggered
+      ]])
+      end)
+
+    it('triggers the autocommand when diagnostics are cleared', function()
+      eq(1, exec_lua [[
+        vim.g.diagnostic_autocmd_triggered = 0
+        vim.cmd('autocmd DiagnosticChanged * let g:diagnostic_autocmd_triggered = 1')
+        vim.api.nvim_buf_set_name(diagnostic_bufnr, "test | test")
+        vim.diagnostic.reset(diagnostic_ns, diagnostic_bufnr)
+        return vim.g.diagnostic_autocmd_triggered
+      ]])
+      end)
   end)
 end)