Remove ccache from compile_commands.json

It confuses vscode's intellisense, causing it to not understand GNUC
syntaxes for example. The bug was reported upstream:
microsoft/vscode-cpptools#7616

src/extension.ts

@@ -16,7 +16,8 @@ import {
  workspaceRelative,
  extensionConfigurationSet,
  getTargetName,
- genEnvFile
+ genEnvFile,
+ patchCompileCommands
 } from "./utils";
 import {
  getMesonTargets,
@@ -39,6 +40,7 @@ import {
 export let extensionPath: string;
 let explorer: MesonProjectExplorer;
 let watcher: vscode.FileSystemWatcher;
+let compileCommandsWatcher: vscode.FileSystemWatcher;
 let mesonWatcher: vscode.FileSystemWatcher;
 let controller: vscode.TestController;
 
@@ -57,6 +59,7 @@ export async function activate(ctx: vscode.ExtensionContext) {
 
  explorer = new MesonProjectExplorer(ctx, root, buildDir);
  watcher = vscode.workspace.createFileSystemWatcher(`${workspaceRelative(extensionConfiguration("buildFolder"))}/build.ninja`, false, false, true);
+ compileCommandsWatcher = vscode.workspace.createFileSystemWatcher(`${workspaceRelative(extensionConfiguration("buildFolder"))}/compile_commands.json`, false, false, true);
  mesonWatcher = vscode.workspace.createFileSystemWatcher("**/meson.build", false, true, false);
  controller = vscode.tests.createTestController('meson-test-controller', 'Meson test controller');
 
@@ -67,6 +70,7 @@ export async function activate(ctx: vscode.ExtensionContext) {
  );
 
  ctx.subscriptions.push(watcher);
+ ctx.subscriptions.push(compileCommandsWatcher);
  ctx.subscriptions.push(mesonWatcher);
  ctx.subscriptions.push(controller);
 
@@ -92,6 +96,13 @@ export async function activate(ctx: vscode.ExtensionContext) {
  watcher.onDidCreate(changeHandler);
  await genEnvFile(buildDir);
 
+ let compileCommandsHandler = async () => {
+ await patchCompileCommands(buildDir);
+ };
+ compileCommandsWatcher.onDidChange(compileCommandsHandler);
+ compileCommandsWatcher.onDidCreate(compileCommandsHandler);
+ await patchCompileCommands(buildDir);
+
  ctx.subscriptions.push(
  vscode.tasks.registerTaskProvider("meson", {
  provideTasks(token) {

src/utils.ts

@@ -166,3 +166,27 @@ export async function genEnvFile(buildDir: string) {
  // Ignore errors, Meson could be too old to support --dump-format.
  }
 }
+
+export async function patchCompileCommands(buildDir: string) {
+ // Remove ccache from compile commands because they confuse Intellisense:
+ // https://github.com/microsoft/vscode-cpptools/issues/7616
+ try {
+ var filePath = path.join(buildDir, "compile_commands.json")
+ var db = JSON.parse(fs.readFileSync(filePath, "utf-8"));
+ } catch {
+ return;
+ }
+ var changed = false;
+ for (var i in db) {
+ // FIXME: This should use proper shlex.split() and shlex.join()
+ var cmd = db[i]['command'].split(" ");
+ if (cmd[0].endsWith("ccache")) {
+ cmd.shift();
+ db[i]["command"] = cmd.join(" ");
+ changed = true;
+ }
+ }
+ if (changed) {
+ fs.writeFileSync(filePath, JSON.stringify(db, null, " "));
+ }
+}