autocommand to disable diagnostics on git conflict

lua/custom/plugins/conflictmarker.lua

@@ -12,4 +12,32 @@ vim.cmd 'highlight ConflictMarkerTheirs guibg=#344f69'
 vim.cmd 'highlight ConflictMarkerEnd guibg=#2f628e'
 vim.cmd 'highlight ConflictMarkerCommonAncestorsHunk guibg=#754a81'
 
-return { 'rhysd/conflict-marker.vim' }
+-- Git conflict marker management plugin
+return {
+  'rhysd/conflict-marker.vim',
+  config = function()
+    -- Read all lines in buffer, check if there is any conflict marker
+    function git_conflict_detection()
+      local lines = vim.api.nvim_buf_get_lines(0, 0, -1, false)
+      -- Check if strict regex is contained in any line
+      local beginning = vim.fn.match(lines, vim.g.conflict_marker_begin)
+      local ending = vim.fn.match(lines, vim.g.conflict_marker_end)
+      if beginning > -1 or ending > -1 then
+        vim.diagnostic.enable(false)
+      else
+        vim.diagnostic.enable(true)
+      end
+    end
+
+    -- Autocommand to disable diagnostics on buffer enter
+    vim.api.nvim_create_autocmd('BufRead', {
+      group = vim.api.nvim_create_augroup('git-conflict-lsp-disable', { clear = true }),
+      callback = git_conflict_detection,
+    })
+    -- Autocommand to disable diagnostics on save
+    vim.api.nvim_create_autocmd('BufWritePre', {
+      group = vim.api.nvim_create_augroup('git-conflict-lsp-disable', { clear = false }),
+      callback = git_conflict_detection,
+    })
+  end,
+}