Refactor of c/cpp lsp and formatting (#947)

ftplugin/c.lua

@@ -1,4 +1,4 @@
-require("lang.c").format()
+require("lang.clang").format()
-require("lang.c").lint()
+require("lang.clang").lint()
-require("lang.c").lsp()
+require("lang.clang").lsp()
-require("lang.c").dap()
+require("lang.clang").dap()

lua/default-config.lua

@@ -91,20 +91,6 @@ O = {
         args = {},
       },
     },
-    clang = {
-      diagnostics = {
-        virtual_text = { spacing = 0, prefix = "" },
-        signs = true,
-        underline = true,
-      },
-      cross_file_rename = true,
-      header_insertion = "never",
-      filetypes = { "c", "cpp", "objc" },
-      formatter = {
-        exe = "clang-format",
-        args = {},
-      },
-    },
     css = {
       virtual_text = true,
       formatter = {
@@ -342,3 +328,5 @@ require("core.zen").config()
 require("core.telescope").config()
 require("core.treesitter").config()
 require("core.which-key").config()
+
+require("lang.clang").config()

lua/lang/clang.lua

@@ -0,0 +1,148 @@
+local M = {}
+
+M.config = function()
+  O.lang.clang = {
+    diagnostics = {
+      virtual_text = { spacing = 0, prefix = "" },
+      signs = true,
+      underline = true,
+    },
+    cross_file_rename = true,
+    header_insertion = "never",
+    filetypes = { "c", "cpp", "objc" },
+    formatter = {
+      exe = "clang-format",
+      args = {},
+    },
+    debug = {
+      adapter = {
+        command = "/usr/bin/lldb-vscode",
+      },
+      stop_on_entry = false,
+    },
+  }
+end
+
+M.format = function()
+  local shared_config = {
+    function()
+      return {
+        exe = O.lang.clang.formatter.exe,
+        args = O.lang.clang.formatter.args,
+        stdin = not (O.lang.clang.formatter.stdin ~= nil),
+      }
+    end,
+  }
+  O.formatters.filetype["c"] = shared_config
+  O.formatters.filetype["cpp"] = shared_config
+  O.formatters.filetype["objc"] = shared_config
+
+  require("formatter.config").set_defaults {
+    logging = false,
+    filetype = O.formatters.filetype,
+  }
+end
+
+M.lint = function()
+  -- TODO: implement linters (if applicable)
+  return "No linters configured!"
+end
+
+M.lsp = function()
+  if require("lv-utils").check_lsp_client_active "clangd" then
+    return
+  end
+  local clangd_flags = { "--background-index" }
+
+  if O.lang.clang.cross_file_rename then
+    table.insert(clangd_flags, "--cross-file-rename")
+  end
+
+  table.insert(clangd_flags, "--header-insertion=" .. O.lang.clang.header_insertion)
+
+  require("lspconfig").clangd.setup {
+    cmd = { DATA_PATH .. "/lspinstall/cpp/clangd/bin/clangd", unpack(clangd_flags) },
+    on_attach = require("lsp").common_on_attach,
+    handlers = {
+      ["textDocument/publishDiagnostics"] = vim.lsp.with(vim.lsp.diagnostic.on_publish_diagnostics, {
+        virtual_text = O.lang.clang.diagnostics.virtual_text,
+        signs = O.lang.clang.diagnostics.signs,
+        underline = O.lang.clang.diagnostics.underline,
+        update_in_insert = true,
+      }),
+    },
+  }
+end
+
+M.dap = function()
+  if O.plugin.dap.active then
+    local dap_install = require "dap-install"
+    local dap = require "dap"
+    dap_install.config("ccppr_vsc_dbg", {})
+    dap.adapters.lldb = {
+      type = "executable",
+      command = O.lang.clang.debug.adapter.command,
+      name = "lldb",
+    }
+    local shared_dap_config = {
+      {
+        name = "Launch",
+        type = "lldb",
+        request = "launch",
+        program = function()
+          return vim.fn.input("Path to executable: ", vim.fn.getcwd() .. "/", "file")
+        end,
+        cwd = "${workspaceFolder}",
+        stopOnEntry = O.lang.clang.debug.stop_on_entry,
+        args = {},
+        env = function()
+          local variables = {}
+          for k, v in pairs(vim.fn.environ()) do
+            table.insert(variables, string.format("%s=%s", k, v))
+          end
+          return variables
+        end,
+        runInTerminal = false,
+      },
+      {
+        -- If you get an "Operation not permitted" error using this, try disabling YAMA:
+        --  echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
+        name = "Attach to process",
+        type = "lldb", -- Adjust this to match your adapter name (`dap.adapters.<name>`)
+        request = "attach",
+        pid = function()
+          local output = vim.fn.system { "ps", "a" }
+          local lines = vim.split(output, "\n")
+          local procs = {}
+          for _, line in pairs(lines) do
+            -- output format
+            --    " 107021 pts/4    Ss     0:00 /bin/zsh <args>"
+            local parts = vim.fn.split(vim.fn.trim(line), " \\+")
+            local pid = parts[1]
+            local name = table.concat({ unpack(parts, 5) }, " ")
+            if pid and pid ~= "PID" then
+              pid = tonumber(pid)
+              if pid ~= vim.fn.getpid() then
+                table.insert(procs, { pid = tonumber(pid), name = name })
+              end
+            end
+          end
+          local choices = { "Select process" }
+          for i, proc in ipairs(procs) do
+            table.insert(choices, string.format("%d: pid=%d name=%s", i, proc.pid, proc.name))
+          end
+          local choice = vim.fn.inputlist(choices)
+          if choice < 1 or choice > #procs then
+            return nil
+          end
+          return procs[choice].pid
+        end,
+        args = {},
+      },
+    }
+    dap.configurations.c = shared_dap_config
+    dap.configurations.cpp = shared_dap_config
+  end
+end
+
+return M