Why flutter downloads dart sdk when I already have it installed #2055

agauniyal · 2016-02-20T09:13:51Z

I already have dart installed from aur, why is it downloading it again? Just use the system path to find already installed one and build itself.

Steps to Reproduce

git clone https://github.com/flutter/flutter.git -b alpha
modify PATH
flutter --version

Flutter Version

Flutter from https://github.com/flutter/flutter.git (on alpha)
flutter revision: 49c0ec3402a58b670d4eefb8ad500d330da59664 (4 days ago)

[✓] The Android toolchain is fully installed.

Dart version (installed from aur)

Dart VM version: 1.14.2 (Tue Feb 9 15:09:45 2016) on "linux_x64"

The text was updated successfully, but these errors were encountered:

Hixie · 2016-02-20T15:55:51Z

We do this mainly to ensure we have a compatible version.

agauniyal · 2016-02-20T18:26:51Z

makes sense since it is in active development, you could add a check in system path's in future.

hooramin · 2017-10-10T17:03:45Z

I have unstable internet connection and git severs are so slow sometimes, so i should download zip files to prevent my downloads interruption.

Flutter doctor downloads again each time , even when i downloaded and installed the exact SDK version as flutter doctor wants to download...

It's really terrible , please open this issue again and think a solution for us .

eseidelGoogle · 2017-10-16T15:37:05Z

Flutter commonly uses development versions of the Dart toolchain which can sometimes be tightly coupled with the Flutter SDK.

bin/cache/dart-sdk.stamp is the file that we check to make sure we have the right one.

We definitely could build our own copy of the Dart toolchain and have it be much smaller than the ones offered through dart-lang.org. We might already even be doing that? @aam would know.

aam · 2017-10-16T16:15:05Z

Few more details on this: since flutter/engine#3972 Flutter needs two dart sdks:

one used for analysis, pub and otherwise running Flutter tools dart code on your workstation. We want to use rather stable version of dart sdk for that. It is in flutter/bin/cache/dart-sdk downloaded from the cloud per flutter/bin/internal/dart-sdk.stamp. You can download it yourself from http://commondatastorage.googleapis.com/dart-archive/channels/dev/raw/<dev-tag-from-dart-sdk.stamp>/sdk/dartsdk-(windows/linux/macos)-x64-release.zip and put it into that folder. Once it's there and its hash matches contents of dart-sdk.stamp, flutter doctor will be happy, won't download it again.
second is used to compile your Flutter app dart code into binary files that are to be read and loaded by Flutter engine on the device. It is critical that this dart sdk matches what Flutter engine is build on, which can be quite bleeding-edge. That one is downloaded together with rest of Fltuter engine artifacts into flutter/bin/cache/artifacts/engine/(linux-x64/win-x64/darwin-x64)/dart-sdk. It is smaller version of dart sdk as it has only components needed to run relevant Dart code on host machine(at the time of writing it is 84M flutter/bin/cache/artifacts/engine/linux-x64 vs 208M flutter/bin/cache/dart-sdk uncompressed).

hjain1 · 2018-02-28T11:27:34Z

Checking Dart SDK version...
Downloading Dart SDK from Flutter engine 13cf22c
1...
Start-BitsTransfer : The certificate authority is invalid or incorrect
At D:\flutterSDK\flutter\bin\internal\update_dart_sdk.ps1:47 char:1

Start-BitsTransfer -Source $dartSdkUrl -Destination $dartSdkZip

  + CategoryInfo          : InvalidOperation: (:) [Start-BitsTransfer], Exce
 ption
  + FullyQualifiedErrorId : StartBitsTransferCOMException,Microsoft.Backgrou
 ndIntelligentTransfer.Management.NewBitsTransferCommand