1 files changed, 73 insertions, 0 deletions
diff --git a/lua/lspconfig/server_configurations/clangd.lua b/lua/lspconfig/server_configurations/clangd.lua
new file mode 100644
index 00000000..9b4a31c7
--- /dev/null
+++ b/lua/lspconfig/server_configurations/clangd.lua
@@ -0,0 +1,73 @@
+local util = require 'lspconfig/util'
+
+-- https://clangd.llvm.org/extensions.html#switch-between-sourceheader
+local function switch_source_header(bufnr)
+  bufnr = util.validate_bufnr(bufnr)
+  local params = { uri = vim.uri_from_bufnr(bufnr) }
+  vim.lsp.buf_request(
+    bufnr,
+    'textDocument/switchSourceHeader',
+    params,
+    util.compat_handler(function(err, result)
+      if err then
+        error(tostring(err))
+      end
+      if not result then
+        print 'Corresponding file cannot be determined'
+        return
+      end
+      vim.api.nvim_command('edit ' .. vim.uri_to_fname(result))
+    end)
+  )
+end
+
+local root_pattern = util.root_pattern('compile_commands.json', 'compile_flags.txt', '.git')
+
+local default_capabilities = vim.tbl_deep_extend(
+  'force',
+  util.default_config.capabilities or vim.lsp.protocol.make_client_capabilities(),
+  {
+    textDocument = {
+      completion = {
+        editsNearCursor = true,
+      },
+    },
+    offsetEncoding = { 'utf-8', 'utf-16' },
+  }
+)
+
+return {
+  default_config = {
+    cmd = { 'clangd', '--background-index' },
+    filetypes = { 'c', 'cpp', 'objc', 'objcpp' },
+    root_dir = function(fname)
+      local filename = util.path.is_absolute(fname) and fname or util.path.join(vim.loop.cwd(), fname)
+      return root_pattern(filename)
+    end,
+    single_file_support = true,
+    capabilities = default_capabilities,
+  },
+  commands = {
+    ClangdSwitchSourceHeader = {
+      function()
+        switch_source_header(0)
+      end,
+      description = 'Switch between source/header',
+    },
+  },
+  docs = {
+    description = [[
+https://clangd.llvm.org/installation.html
+
+**NOTE:** Clang >= 9 is recommended! See [this issue for more](https://github.com/neovim/nvim-lsp/issues/23).
+
+clangd relies on a [JSON compilation database](https://clang.llvm.org/docs/JSONCompilationDatabase.html) specified
+as compile_commands.json or, for simpler projects, a compile_flags.txt.
+For details on how to automatically generate one using CMake look [here](https://cmake.org/cmake/help/latest/variable/CMAKE_EXPORT_COMPILE_COMMANDS.html). Alternatively, you can use [Bear](https://github.com/rizsotto/Bear).
+]],
+    default_config = {
+      root_dir = [[root_pattern("compile_commands.json", "compile_flags.txt", ".git") or dirname]],
+      capabilities = [[default capabilities, with offsetEncoding utf-8]],
+    },
+  },
+}