VSCodeでFlutterのNewProjectコマンドを実行すると失敗する。

Question

Visual Studio CodeのコマンドパレットでFlutter:New Projectを実行すると/root/.pub-cache/hosted/pub.dartlang.org/flutter_template_images-1.0.0/lib/にアクセス権限がなく失敗する。

/rootにアクセスできるよう権限を変更する方法もあるがそれはセキュリティの問題でそれ以外の解決案を提案していただけるとありがたいです。
できれば、/home/<user>/.pub-cache/hosted/pub.dartlang.org/flutter_template_images-1.0.0/lib/にパスを変更できるといいのですが。

flutter_01.log

command

flutter create --ios-language swift --android-language kotlin .

exception

FileSystemException: FileSystemException: Exists failed, path = '/root/.pub-cache/hosted/pub.dartlang.org/flutter_template_images-1.0.0/lib/' (OS Error: Permission denied, errno = 13)

#0      _Directory.existsSync (dart:io/directory_impl.dart:101:7)
#1      ForwardingFileSystemEntity.existsSync (package:file/src/forwarding/forwarding_file_system_entity.dart:45:33)
#2      _templateImageDirectory (package:flutter_tools/src/template.dart:253:79)
#3      Template.fromName (package:flutter_tools/src/template.dart:63:38)
#4      CreateCommand._renderTemplate (package:flutter_tools/src/commands/create.dart:629:46)
#5      CreateCommand._generateApp (package:flutter_tools/src/commands/create.dart:543:29)
#6      CreateCommand.runCommand (package:flutter_tools/src/commands/create.dart:380:37)
#7      _rootRunUnary (dart:async/zone.dart:1192:38)
#8      _CustomZone.runUnary (dart:async/zone.dart:1085:19)
#9      _FutureListener.handleValue (dart:async/future_impl.dart:141:18)
#10     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
#11     Future._propagateToListeners (dart:async/future_impl.dart:711:32)
#12     Future._completeWithValue (dart:async/future_impl.dart:526:5)
#13     _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:36:15)
#14     _completeOnAsyncReturn (dart:async-patch/async_patch.dart:298:13)
#15     FlutterProject.organizationNames (package:flutter_tools/src/project.dart)
#16     _rootRunUnary (dart:async/zone.dart:1192:38)
#17     _CustomZone.runUnary (dart:async/zone.dart:1085:19)
#18     _FutureListener.handleValue (dart:async/future_impl.dart:141:18)
#19     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
#20     Future._propagateToListeners (dart:async/future_impl.dart:711:32)
#21     Future._completeWithValue (dart:async/future_impl.dart:526:5)
#22     _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:36:15)
#23     _completeOnAsyncReturn (dart:async-patch/async_patch.dart:298:13)
#24     IosProject.productBundleIdentifier (package:flutter_tools/src/project.dart)
#25     _rootRunUnary (dart:async/zone.dart:1192:38)
#26     _CustomZone.runUnary (dart:async/zone.dart:1085:19)
#27     _FutureListener.handleValue (dart:async/future_impl.dart:141:18)
#28     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
#29     Future._propagateToListeners (dart:async/future_impl.dart:711:32)
#30     Future._completeWithValue (dart:async/future_impl.dart:526:5)
#31     Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:556:7)
#32     _rootRun (dart:async/zone.dart:1184:13)
#33     _CustomZone.run (dart:async/zone.dart:1077:19)
#34     _CustomZone.runGuarded (dart:async/zone.dart:979:7)
#35     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1019:23)
#36     _microtaskLoop (dart:async/schedule_microtask.dart:43:21)
#37     _startMicrotaskLoop (dart:async/schedule_microtask.dart:52:5)
#38     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
#39     _Timer._runTimers (dart:isolate-patch/timer_impl.dart:405:11)
#40     _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429:5)
#41     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

flutter doctor

[✓] Flutter (Channel stable, v1.17.5, on Linux, locale ja_JP.UTF-8)
    • Flutter version 1.17.5 at /opt/flutter
    • Framework revision 8af6b2f038 (11 days ago), 2020-06-30 12:53:55 -0700
    • Engine revision ee76268252
    • Dart version 2.8.4

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.0)
    • Android SDK at /opt/android-sdk
    • Platform android-30, build-tools 30.0.0
    • ANDROID_HOME = /opt/android-sdk
    • Java binary at: /usr/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_252-b09)
    • All Android licenses accepted.

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).

[!] Connected device
    ! No devices available

! Doctor found issues in 2 categories.

Answer 1

これはArchLinuxを使っている場合に有効です。
FlutterをAURヘルパーでインストールすると今回の問題が発生するようです。
当方はaurmanを使っていたのでまず、
$ aurman -Rs flutter
でflutterをアンインストールしてからFlutter公式のインストール方法に従って進めればOKでした。

Answer 2

PUB_CACHE環境変数で、pathを変更することができるようです。
※通常はホームディレクトリにできるようですが...

https://dart.dev/tools/pub/environment-variables

Comments

[rtgsdfsdg]

ターミナル上で`export PUB_CACHE=$HOME`を実行し`flutter create hello_world`を実行してみましたが同じエラーが発生しました。