Asynchronize file copies (#882)

src/Library/Library.js

@@ -80,7 +80,7 @@ export function getDemo(name) {
 
 async function openDemo({ application, demo_name, language }) {
   const demo = getDemo(demo_name);
-  const session = createSessionFromDemo(demo);
+  const session = await createSessionFromDemo(demo);
 
   if (language) {
     session.settings.set_int("code-language", language.index);

src/PanelCode.js

@@ -2,8 +2,13 @@ import Gio from "gi://Gio";
 import GObject from "gi://GObject";
 
 import { settings as global_settings, makeDropdownFlat } from "./util.js";
+import { setupRustProject } from "./langs/rust/rust.js";
 
-export default function PanelCode({ builder, previewer, settings }) {
+export default function PanelCode({
+  builder,
+  previewer,
+  session: { settings, file },
+}) {
   const panel_code = builder.get_object("panel_code");
   const button_code = builder.get_object("button_code");
   const stack_code = builder.get_object("stack_code");
@@ -47,6 +52,10 @@ export default function PanelCode({ builder, previewer, settings }) {
     panel.language = dropdown_code_lang.selected_item?.string;
     stack_code.visible_child_name = panel.language;
     previewer.useInternal().catch(console.error);
+
+    if (panel.language.toLowerCase() === "rust") {
+      setupRustProject(file).catch(console.error);
+    }
   }
   switchLanguage();
 

src/application.js

@@ -75,14 +75,11 @@ function setColorScheme() {
 setColorScheme();
 settings.connect("changed::color-scheme", setColorScheme);
 
-// We are not using async otherwise the app segfaults
-// does not like opening a window in a promise
-// TODO: make a reproducer and file a GJS bug
 function restoreSessions() {
   const sessions = getSessions();
 
   if (sessions.length < 1) {
-    bootstrap();
+    bootstrap().catch(console.error);
   } else {
     sessions.forEach((session) => {
       const { load } = Window({
@@ -94,15 +91,15 @@ function restoreSessions() {
   }
 }
 
-function bootstrap() {
+async function bootstrap() {
   const first_run = settings.get_boolean("first-run");
   if (!first_run) {
     application.activate_action("library", null);
     return;
   }
 
   const demo = getDemo("Welcome");
-  const session = createSessionFromDemo(demo);
+  const session = await createSessionFromDemo(demo);
   const { load, window } = Window({
     application,
     session,

src/init.js

@@ -96,3 +96,5 @@ Gio._promisify(
   "next_files_async",
   "next_files_finish",
 );
+
+Gio._promisify(Gio.File.prototype, "copy_async", "copy_finish");

src/langs/rust/Compiler.js

@@ -1,8 +1,8 @@
 import Gio from "gi://Gio";
 import GLib from "gi://GLib";
 import dbus_previewer from "../../Previewer/DBusPreviewer.js";
-import { copyDirectory, decode, encode } from "../../util.js";
-import { rust_template_dir } from "./rust.js";
+import { decode, encode } from "../../util.js";
+import { installRustLibraries } from "./rust.js";
 
 export default function Compiler({ session }) {
   const { file } = session;
@@ -16,7 +16,7 @@ export default function Compiler({ session }) {
   let savedRustcVersion;
 
   async function compile() {
-    copyDirectory(rust_template_dir, file);
+    await installRustLibraries(file);
 
     rustcVersion ||= await getRustcVersion();
     savedRustcVersion ||= await getSavedRustcVersion({ rustcVersionFile });

src/langs/rust/rust.js

@@ -1,4 +1,5 @@
 import Gio from "gi://Gio";
+import GLib from "gi://GLib";
 
 import { createLSPClient } from "../../common.js";
 import { getLanguage } from "../../util.js";
@@ -32,6 +33,43 @@ export function setup({ document }) {
   return lspc;
 }
 
-export const rust_template_dir = Gio.File.new_for_path(
+const rust_template_dir = Gio.File.new_for_path(
   pkg.pkgdatadir,
 ).resolve_relative_path("langs/rust/template");
+
+export async function setupRustProject(destination) {
+  return Promise.all([
+    copy("Cargo.toml", rust_template_dir, destination, Gio.FileCopyFlags.NONE),
+    copy("Cargo.lock", rust_template_dir, destination, Gio.FileCopyFlags.NONE),
+  ]);
+}
+
+export async function installRustLibraries(destination) {
+  return Promise.all([
+    copy("lib.rs", rust_template_dir, destination, Gio.FileCopyFlags.OVERWRITE),
+    copy(
+      "workbench.rs",
+      rust_template_dir,
+      destination,
+      Gio.FileCopyFlags.OVERWRITE,
+    ),
+  ]);
+}
+
+async function copy(filename, source_dir, dest_dir, flags) {
+  const file = source_dir.get_child(filename);
+  try {
+    await file.copy_async(
+      dest_dir.get_child(file.get_basename()),
+      flags,
+      GLib.PRIORITY_DEFAULT,
+      null,
+      null,
+      null,
+    );
+  } catch (err) {
+    if (!err.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.EXISTS)) {
+      throw err;
+    }
+  }
+}

src/sessions.js

@@ -13,7 +13,6 @@ import {
   copyDirectory,
 } from "./util.js";
 import { languages } from "./common.js";
-import { rust_template_dir } from "./langs/rust/rust.js";
 
 export const sessions_dir = data_dir.get_child("sessions");
 
@@ -57,16 +56,16 @@ function createSession() {
   return session;
 }
 
-export function createSessionFromDemo(demo) {
+export async function createSessionFromDemo(demo) {
   const { name, panels } = demo;
 
   const session = createSession();
   const demo_dir = demos_dir.get_child(name);
 
   const { file, settings } = session;
-  copyDirectory(demo_dir, file);
-  copyDirectory(rust_template_dir, file);
+  await copyDirectory(demo_dir, file);
 
+  settings.delay();
   settings.set_string("name", name);
   settings.set_boolean("show-code", panels.includes("code"));
   settings.set_boolean("show-style", panels.includes("style"));
@@ -76,6 +75,7 @@ export function createSessionFromDemo(demo) {
     "code-language",
     global_settings.get_int("recent-code-language"),
   );
+  settings.apply();
 
   return session;
 }
@@ -84,7 +84,13 @@ export async function deleteSession(session) {
   // There is no method to recursively delete a folder so we trash instead
   // https://github.com/flatpak/xdg-desktop-portal/issues/630 :/
   // portal.trash_file(file.get_path(), null).catch(console.error);
-  session.file.trash(null);
+  try {
+    session.file.trash(null);
+  } catch (err) {
+    if (!err.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.EXISTS)) {
+      throw err;
+    }
+  }
 }
 
 export async function saveSessionAsProject(session, destination) {

src/util.js

@@ -104,19 +104,23 @@ export const demos_dir = Gio.File.new_for_path(
 ).resolve_relative_path("demos");
 
 // There is no copy directory function
-export function copyDirectory(source, destination) {
-  for (const file_info of source.enumerate_children(
-    "",
+export async function copyDirectory(source, destination) {
+  const enumerator = await source.enumerate_children_async(
+    "standard::name",
     Gio.FileQueryInfoFlags.NOFOLLOW_SYMLINKS,
+    GLib.PRIORITY_DEFAULT,
     null,
-  )) {
+  );
+
+  for await (const file_info of enumerator) {
     if (file_info.get_file_type() === Gio.FileType.DIRECTORY) continue;
     const child = source.get_child(file_info.get_name());
 
     try {
-      child.copy(
+      await child.copy_async(
         destination.get_child(child.get_basename()),
         Gio.FileCopyFlags.NONE,
+        GLib.PRIORITY_DEFAULT,
         null,
         null,
       );

src/window.js

@@ -154,7 +154,7 @@ export default function Window({ application, session }) {
   const panel_code = PanelCode({
     builder,
     previewer,
-    settings,
+    session,
   });
 
   previewer.setPanelCode(panel_code);