When I run flutter change channel or flutter doctor, the CMD show me this:
C:\Users\MyUser>flutter doctor -v
Checking Dart SDK version...
Building flutter tool...
Running pub upgrade...
/C:/src/flutter/packages/flutter_tools/lib/src/aot.dart:144:5: Warning: Must explicitly return a value from a non-void function.
return;
^
When I run:
git clean -xfd
git pull
flutter doctor
The CDM show me this:
fatal: not a git repository (or any of the parent directories): .git
How can I solve it? Thank you
Had the same issue...Copied the flutter_tools from flutter download and replaced with the same folder in my installation then ran flutter doctor from command in administrator mode.
Funny the issue started 3 days ago for me too.
1.Go the Flutter install directory and please run (in cmd)
git clean -xfd
git stash save --keep-index
git stash drop
git pull
2.and restart your computer
then run
flutter doctor
3.then go to your project path run
flutter packages get
flutter run
I had the exact same problem yesterday, i tired to run
git clean -xfd
git pull
flutter doctor
in cmd and i kept getting:
fatal: not a git repository (or any of the parent directories): .git
eventually i gave up and i deleted the old flutter sdk directory from my PC as well as the path from Enviroment Variables and i downloded the new sdk and setup flutter again and now it's running fine
https://docs.flutter.dev/get-started/install
On windows, delete flutter folder C:\Users\User\AppData\Local\Pub
This is the flutter temp/cache folder and may contain outdated versions of the libraries
unfortunately none of the given solution so far works for me..
I had to the following steps, which was the only solution for me:
delete the whole flutter folder
extract (or copy) it from the zip-file to your installation directory (in my case I just downloaded the latest flutter version, because I didn't have access to the previous downloaded zip-file anymore)
open the IDE in the installation directory (or open the associated project)
run flutter pub get
Related
I upgraded my Flutter SDK and now my project is broken. I need to basically revert back to a Flutter SDK which uses Dart 1.x.
I tried the following in the pubspec.yaml,
environment:
sdk: ">=1.19.0 <2.0.0"
flutter: "^0.1.2"
dependencies:
flutter:
sdk: flutter
but now the project just simply doesn't build.
Running "flutter packages get" in binformed...
Package binformed requires Flutter SDK version ^0.1.2 but the current SDK is 0.2.5-pre.38.
pub get failed (1)
Do i need to uninstall the SDK and reinstall it?
Flutter is versioned using git. Changing the Flutter version is as simple as changing git branch.
There are 2 different ways:
flutter channel <branch> (example: flutter channel stable)
This command is used to change between branches – usually stable/dev/beta/master.
We can also put a specific commit id from git.
flutter downgrade <version> (example: flutter downgrade v1.2.1)
This command will use a specific version number.
You can have the list of the available version numbers using flutter downgrade or here
After this, run any Flutter command (such as flutter doctor), and Flutter will take care of downloading/compiling everything required to run this version.
Run the following command to see a list of available versions.
flutter version
Then choose a version you want to switch to by running
flutter version v1.2.1
To undo and revert back to stable
flutter channel stable
flutter upgrade
In the Flutter install directory execute
git checkout v0.1.9
then run
flutter doctor
You can check which versions are available in the Flutter GitHub repository https://github.com/flutter/flutter
There is an open feature request to make this easier https://github.com/flutter/flutter/issues/14230
Don't use flutter version vX.X.X, use flutter downgrade instead.
Warning: "flutter version" will leave the SDK in a detached HEAD state. If you are using the command to return to a previously installed SDK version consider using the "flutter downgrade" command instead.
So, you should use
flutter downgrade
Edit:
If there had been no previous versions installed, the above command would fail. So, if you have a specific version of Flutter that you’d like to switch to, you can use the flutter version command:
flutter downgrade v1.17.0
You can find list of versions here
To downgrade there are many deprecated commands.
The two that actually work, and I've tested them, are:
flutter downgrade v[flutter build version]
For instance:
flutter downgrade v1.22.6
And the other one: go to your flutter sdk folder, that is your folder named "flutter" and inside it open a new terminal. Then type:
git checkout [flutter build version]
For instance:
git checkout 1.22.3
Then do flutter doctor and you'll confirm you switched correctly.
You can check the versions on: https://flutter.dev/docs/development/tools/sdk/releases?tab=macos
And for details at: https://flutter.dev/docs/release/breaking-changes
If you happen to want to switch channel, just do:
flutter channel [channel]
For instance (choose one of master, stable, dev, beta):
flutter channel stable
And if you want to upgrade again:
flutter upgrade
Inorder for a proper downgrade to any version.
Change to Dev mode
flutter channel dev
flutter downgrade v(type your version number) eg below.
flutter downgrade v2.0.6
This worked for me !
Go to the terminal and type the specific version number, for eg -
flutter downgrade v1.22.3
Then just press enter.
After fetching the files from the internet, it will ask,
Downgrade flutter to version 1.22.5
? [y|n]:
Type y and it will downgrade to the specific version.
Restart the IDE for the settings to take place.
To solve these errors:
$ flutter version
Could not find a command named "version".
$ flutter downgrade v1.22.6
There is no previously recorded version for channel "stable".
Delete old flutter folder
Download the archive and unzip instead of deleted flutter folder
OR
cd "$(dirname $(which flutter))" then
git checkout . (optional)
git pull origin (optional)
git checkout v1.22.6
flutter doctor
p.s.
Don't forget to restart your android studio
At the moment, the easiest way to manage flutter versions is through fvm.
Install fvm
brew tap leoafarias/fvm
brew install fvm
Install your version
fvm install x.x.x
Install your version globally (if desired)
fvm global x.x.x
Here's a link to the app guide
https://fvm.app/docs/getting_started/installation
Just use flutter downgrade v2.8.0
then flutter ask for confirmation
Downgrade flutter to version 1.22.5
? [y|n]:
Type y for Yes to confirm changes
Download Flutter SDK release: flutter_windows_1.17.0-stable: https://flutter.dev/docs/development/tools/sdk/releases
Replace the existing Flutter folder to this version
Make sure that environment variables and Flutter + Dart Settings on your IDE
are still tied to this folder/path
Just flutter downgrade is enough, it will downgrade to previous stable version.
I find it a little tough to switch (upgrade/downgrade) to a specific Flutter version from the command line. Some of the answers here are outdated.
I prefer to download the SDKs for different versions from here manually.
Let's say I download 2.0.1, 2.0.5 and 2.0.6.
2.0.1 is the current Flutter SDK version for me.
To switch to 2.0.5, delete the current Flutter SDK (the one with the blue icon) and unzip flutter_macos_2.0.5-stable.zip. Then run flutter clean followed by flutter doctor to confirm that everything worked correctly.
This has the benefit of not having to change any paths or having to re-download the entire SDK every time you want to switch.
On macOS, if you get system warnings for not being able to run dart or gentool, then press Allow anyway under System Preferences > Security & Privacy
The simplest way to change your flutter version is to:
Navigate to this link and download the flutter version you want.
Extract the files and replace your older flutter directory with them.
If you were using flutter already then no need to redefine the PATH, else, make sure that environment variables are still tied to this folder/path.
Run flutter --version or flutter doctor to check that everything went ok.
I found 2-steps easy solution to migrate to any specific version of Flutter.
Navigate to Flutter repo path (Yes, the one we download from official website and unzipped it) in a terminal
Run the following command : git checkout 2.10.5 && flutter precache
Note: Verify & change the Flutter version from here
Open Terminal and Navigate to Flutter folder
Run the following command with the Flutter version you want to switch to:
git checkout 2.10.5 && flutter precache
Reference: https://github.com/flutter/flutter/issues/64238#issuecomment-678605514
All the answers are outdated and not working after the release of flutter 3.0.
My solution is somewhat complicated but will still work in May 2022 and after.
I will show you how to downgrade from flutter 3 to Flutter 1.22.6.
the first step is to locate where you have to install flutter files when you have installed them for the 1st time. Like mine is located in c:\src\flutter.
Cut the flutter folder and paste it somewhere. (note:- you have shutdown your android studio/vs code if running)
go to Flutter SDK releases and download the desired flutter version you want. I choose flutter 1.22.6 for windows.
now extract the downloaded flutter zip and paste in c:\src\flutter (or wherever your flutter was installed previously). (don't worry if you're thinking that your Environment Variables path will change, so that is not true, it will still work. you don't have to change anything in Environment variables)
After pasting the flutter extracted folder open android studio and go to File/Setting/language and framework/flutter and correct the Flutter SDK path to C:\src\flutter.(as shown in the image).
6. Now press apply and run flutter --version
if you are using brew (macos)
you can create rb file and use brew to install or downgrade flutter
create file with name flutter.rb
cask "flutter" do
version "2.2.0"
url "https://storage.googleapis.com/flutter_infra_release/releases/stable/macos/flutter_macos_#{version}-st$
verified: "storage.googleapis.com/flutter_infra_release/"
name "Flutter SDK"
desc "UI toolkit for building applications for mobile, web and desktop"
homepage "https://flutter.dev/"
livecheck do
url "https://storage.googleapis.com/flutter_infra_release/releases/releases_macos.json"
regex(%r{/flutter[._-]macos[._-]v?(\d+(?:\.\d+)+)[._-]stable\.zip}i)
end
auto_updates true
binary "flutter/bin/dart"
binary "flutter/bin/flutter"
end
then use brew install ./flutter.rb to install flutter or downgrade flutter version
This solutions works in 2021
Go to your flutter SDK folder, which is your folder named "flutter" and inside it open a new terminal. Then type:
git checkout (your flutter version)
then,
run flutter doctor
After this check your version.
To downgrade your flutter version:
Run flutter downgrade v2.5.3 or whatever flutter version you want from here.
If it resulted in any error like
There is no previously recorded version for channel "stable".
or that there is no previous version,
then, make sure to switch to the correct branch {stable, master, dev, beta} using the following command:
flutter channel master
Finally, Run flutter doctor to check that everthing went well.
These are the flowing step to downgrade any flutter version:
Step 1:
cd [your flutter sdk path]
Step 2:
git checkout [ enter your version ref ]
To get ref goto the url and copy your desired version ref.
https://docs.flutter.dev/development/tools/sdk/releases
Suppose I downgrade version 3.3.2
Step 3:
flutter doctor or flutter --version
Downgrade to a specific version on stable channel
Locate flutter path:
whereis flutter
On flutter folder execute
# clean the repo
git clean -fdx
git reset --hard
git fetch --all --prune
# list available tags starting with 2.10
git tag | grep 2.10
# checkout to stable on tag
git checkout stable
git reset --hard 2.10.5
Finally download the flutter tools
flutter doctor
The easiest way is to go to your flutter sdk, if you're on Linux open terminal and run flutter sdk-path then cd to the sdk path.
run git checkout <ref_of_sdk_you_want>. access the sdk versions here. after the switch, run flutter doctor and restart your IDE, that's it.
You can switch between versions using this way.
Steps to change the Flutter version is as simple as changing the git branch.
flutter channel <branch> (example: flutter channel stable)
This command is used to change between branches – usually stable/dev/beta/master. We can also put a specific commit id from git.
flutter downgrade <version> (example: flutter downgrade v1.2.1)
This command will use a specific version number. You can have the list of the available version numbers using flutter downgrade
After this, run any Flutter command (such as flutter doctor), and Flutter will take care of downloading/compiling everything required to run this version.
fatal: not a git repository (or any of the parent directories): .git Could not find a file named "pubspec.yaml" in "C:\Windows\System32". pub get failed (66; Could not find a file named "pubspec.yaml" in "C:\Windows\System32".)
hi everyone
I got this error message every time when I tried to create a flutter project by an android studio or by cmd
I checked flutter doctor command and appear no problems about flutter installation
so any advice about this problem?
[error message when I used android studio 1
flutter doctor message
You can try below steps:
First, you reboot(restart) your PC.
Before opening anything, you delete your flutter folder.
Unzipped a new flutter installation into the same directory.
Inside your project directory You run flutter packages get
Then open the IDE and everything will be working.
Refer flutter issue for more information.
I use this line in C:\src
git clone -b stable https://github.com/flutter/flutter.git
And in PATH i type this line:
C:\src\flutter\bin
Then
flutter doctor
but output is :
How can i install Flutter correctly?
some error is:
Error: 'pub upgrade' still failing after 10 tries, giving up.
Error: Error when reading '.packages': The system cannot find the file specified.
Error: Error when reading '../../bin/cache/flutter_tools.snapshot': The system cannot find the file specified.
I had the same problem days ago, what I did is
Remove cache folder inside bin/cache
Run flutter doctor again
Also I just cloned the master branch and then run flutter doctor
git clone -b master https://github.com/flutter/flutter.git
And if it doesn't work, most likely is what #user11945700 is saying, something about Antivirus or Firewall, so I recommend you to disable everything, install it, and then activate again.
Otherwise if you want other version you may use this to dowload Flutter releases versions
Another guess, could you install it if you run the prompt shell as administrator?
I use this link
https://flutter.dev/docs/development/tools/sdk/releases?tab=windows
extract file in C:/src
in
C:/src/flutter/bin
Run:
flutter doctor
This link help you to install Flutter:
https://www.aparat.com/v/Da9IN/%D8%A2%D9%85%D9%88%D8%B2%D8%B4_%DA%A9%D8%A7%D9%85%D9%84_%D9%86%D8%B5%D8%A8_flutter
If in your system antivirus or firewall is there then mostly its due to that. try after suspending antivirus and firewall
You also have one option directly download stable version from here - https://flutter.dev/docs/development/tools/sdk/releases
I follow the flutter documentation correctly. I'm done installing flutter SDK, put it at the correct path(c:\src\flutter[my flutter]), open the flutter_console.bat, locate at the command line cd c:/src/flutter, run flutter doctor, to see if there is anythin I need to do, I found one
And I get this error
Error: The Flutter directory is not a clone of the GitHub project.
The flutter tool requires Git in order to operate properly;
to set up Flutter, run the following command:
git clone -b stable https://github.com/flutter/flutter.git
And run the following command cd c:/src/flutter> git clone -b stable https://github.com/flutter/flutter.git base on what the flutter doctor says
After, I run flutter doctor again, and GET THE SAME ERROR.
Am I wrong?
I have the command prompt and powershell 5.1, my system requirements fits the criteria on running flutter apps.
I expect I don't have any issue running flutter doctor again
It seems you got the wrong path of the SDK.
Maybe this is a bug with flutter doctor.
Check yout flutter SDK version first,the latest version have fixed the issue.
I upgraded my Flutter SDK and now my project is broken. I need to basically revert back to a Flutter SDK which uses Dart 1.x.
I tried the following in the pubspec.yaml,
environment:
sdk: ">=1.19.0 <2.0.0"
flutter: "^0.1.2"
dependencies:
flutter:
sdk: flutter
but now the project just simply doesn't build.
Running "flutter packages get" in binformed...
Package binformed requires Flutter SDK version ^0.1.2 but the current SDK is 0.2.5-pre.38.
pub get failed (1)
Do i need to uninstall the SDK and reinstall it?
Flutter is versioned using git. Changing the Flutter version is as simple as changing git branch.
There are 2 different ways:
flutter channel <branch> (example: flutter channel stable)
This command is used to change between branches – usually stable/dev/beta/master.
We can also put a specific commit id from git.
flutter downgrade <version> (example: flutter downgrade v1.2.1)
This command will use a specific version number.
You can have the list of the available version numbers using flutter downgrade or here
After this, run any Flutter command (such as flutter doctor), and Flutter will take care of downloading/compiling everything required to run this version.
Run the following command to see a list of available versions.
flutter version
Then choose a version you want to switch to by running
flutter version v1.2.1
To undo and revert back to stable
flutter channel stable
flutter upgrade
In the Flutter install directory execute
git checkout v0.1.9
then run
flutter doctor
You can check which versions are available in the Flutter GitHub repository https://github.com/flutter/flutter
There is an open feature request to make this easier https://github.com/flutter/flutter/issues/14230
Don't use flutter version vX.X.X, use flutter downgrade instead.
Warning: "flutter version" will leave the SDK in a detached HEAD state. If you are using the command to return to a previously installed SDK version consider using the "flutter downgrade" command instead.
So, you should use
flutter downgrade
Edit:
If there had been no previous versions installed, the above command would fail. So, if you have a specific version of Flutter that you’d like to switch to, you can use the flutter version command:
flutter downgrade v1.17.0
You can find list of versions here
To downgrade there are many deprecated commands.
The two that actually work, and I've tested them, are:
flutter downgrade v[flutter build version]
For instance:
flutter downgrade v1.22.6
And the other one: go to your flutter sdk folder, that is your folder named "flutter" and inside it open a new terminal. Then type:
git checkout [flutter build version]
For instance:
git checkout 1.22.3
Then do flutter doctor and you'll confirm you switched correctly.
You can check the versions on: https://flutter.dev/docs/development/tools/sdk/releases?tab=macos
And for details at: https://flutter.dev/docs/release/breaking-changes
If you happen to want to switch channel, just do:
flutter channel [channel]
For instance (choose one of master, stable, dev, beta):
flutter channel stable
And if you want to upgrade again:
flutter upgrade
Inorder for a proper downgrade to any version.
Change to Dev mode
flutter channel dev
flutter downgrade v(type your version number) eg below.
flutter downgrade v2.0.6
This worked for me !
Go to the terminal and type the specific version number, for eg -
flutter downgrade v1.22.3
Then just press enter.
After fetching the files from the internet, it will ask,
Downgrade flutter to version 1.22.5
? [y|n]:
Type y and it will downgrade to the specific version.
Restart the IDE for the settings to take place.
To solve these errors:
$ flutter version
Could not find a command named "version".
$ flutter downgrade v1.22.6
There is no previously recorded version for channel "stable".
Delete old flutter folder
Download the archive and unzip instead of deleted flutter folder
OR
cd "$(dirname $(which flutter))" then
git checkout . (optional)
git pull origin (optional)
git checkout v1.22.6
flutter doctor
p.s.
Don't forget to restart your android studio
At the moment, the easiest way to manage flutter versions is through fvm.
Install fvm
brew tap leoafarias/fvm
brew install fvm
Install your version
fvm install x.x.x
Install your version globally (if desired)
fvm global x.x.x
Here's a link to the app guide
https://fvm.app/docs/getting_started/installation
Just use flutter downgrade v2.8.0
then flutter ask for confirmation
Downgrade flutter to version 1.22.5
? [y|n]:
Type y for Yes to confirm changes
Download Flutter SDK release: flutter_windows_1.17.0-stable: https://flutter.dev/docs/development/tools/sdk/releases
Replace the existing Flutter folder to this version
Make sure that environment variables and Flutter + Dart Settings on your IDE
are still tied to this folder/path
Just flutter downgrade is enough, it will downgrade to previous stable version.
I find it a little tough to switch (upgrade/downgrade) to a specific Flutter version from the command line. Some of the answers here are outdated.
I prefer to download the SDKs for different versions from here manually.
Let's say I download 2.0.1, 2.0.5 and 2.0.6.
2.0.1 is the current Flutter SDK version for me.
To switch to 2.0.5, delete the current Flutter SDK (the one with the blue icon) and unzip flutter_macos_2.0.5-stable.zip. Then run flutter clean followed by flutter doctor to confirm that everything worked correctly.
This has the benefit of not having to change any paths or having to re-download the entire SDK every time you want to switch.
On macOS, if you get system warnings for not being able to run dart or gentool, then press Allow anyway under System Preferences > Security & Privacy
The simplest way to change your flutter version is to:
Navigate to this link and download the flutter version you want.
Extract the files and replace your older flutter directory with them.
If you were using flutter already then no need to redefine the PATH, else, make sure that environment variables are still tied to this folder/path.
Run flutter --version or flutter doctor to check that everything went ok.
I found 2-steps easy solution to migrate to any specific version of Flutter.
Navigate to Flutter repo path (Yes, the one we download from official website and unzipped it) in a terminal
Run the following command : git checkout 2.10.5 && flutter precache
Note: Verify & change the Flutter version from here
Open Terminal and Navigate to Flutter folder
Run the following command with the Flutter version you want to switch to:
git checkout 2.10.5 && flutter precache
Reference: https://github.com/flutter/flutter/issues/64238#issuecomment-678605514
All the answers are outdated and not working after the release of flutter 3.0.
My solution is somewhat complicated but will still work in May 2022 and after.
I will show you how to downgrade from flutter 3 to Flutter 1.22.6.
the first step is to locate where you have to install flutter files when you have installed them for the 1st time. Like mine is located in c:\src\flutter.
Cut the flutter folder and paste it somewhere. (note:- you have shutdown your android studio/vs code if running)
go to Flutter SDK releases and download the desired flutter version you want. I choose flutter 1.22.6 for windows.
now extract the downloaded flutter zip and paste in c:\src\flutter (or wherever your flutter was installed previously). (don't worry if you're thinking that your Environment Variables path will change, so that is not true, it will still work. you don't have to change anything in Environment variables)
After pasting the flutter extracted folder open android studio and go to File/Setting/language and framework/flutter and correct the Flutter SDK path to C:\src\flutter.(as shown in the image).
6. Now press apply and run flutter --version
if you are using brew (macos)
you can create rb file and use brew to install or downgrade flutter
create file with name flutter.rb
cask "flutter" do
version "2.2.0"
url "https://storage.googleapis.com/flutter_infra_release/releases/stable/macos/flutter_macos_#{version}-st$
verified: "storage.googleapis.com/flutter_infra_release/"
name "Flutter SDK"
desc "UI toolkit for building applications for mobile, web and desktop"
homepage "https://flutter.dev/"
livecheck do
url "https://storage.googleapis.com/flutter_infra_release/releases/releases_macos.json"
regex(%r{/flutter[._-]macos[._-]v?(\d+(?:\.\d+)+)[._-]stable\.zip}i)
end
auto_updates true
binary "flutter/bin/dart"
binary "flutter/bin/flutter"
end
then use brew install ./flutter.rb to install flutter or downgrade flutter version
This solutions works in 2021
Go to your flutter SDK folder, which is your folder named "flutter" and inside it open a new terminal. Then type:
git checkout (your flutter version)
then,
run flutter doctor
After this check your version.
To downgrade your flutter version:
Run flutter downgrade v2.5.3 or whatever flutter version you want from here.
If it resulted in any error like
There is no previously recorded version for channel "stable".
or that there is no previous version,
then, make sure to switch to the correct branch {stable, master, dev, beta} using the following command:
flutter channel master
Finally, Run flutter doctor to check that everthing went well.
These are the flowing step to downgrade any flutter version:
Step 1:
cd [your flutter sdk path]
Step 2:
git checkout [ enter your version ref ]
To get ref goto the url and copy your desired version ref.
https://docs.flutter.dev/development/tools/sdk/releases
Suppose I downgrade version 3.3.2
Step 3:
flutter doctor or flutter --version
Downgrade to a specific version on stable channel
Locate flutter path:
whereis flutter
On flutter folder execute
# clean the repo
git clean -fdx
git reset --hard
git fetch --all --prune
# list available tags starting with 2.10
git tag | grep 2.10
# checkout to stable on tag
git checkout stable
git reset --hard 2.10.5
Finally download the flutter tools
flutter doctor
The easiest way is to go to your flutter sdk, if you're on Linux open terminal and run flutter sdk-path then cd to the sdk path.
run git checkout <ref_of_sdk_you_want>. access the sdk versions here. after the switch, run flutter doctor and restart your IDE, that's it.
You can switch between versions using this way.
Steps to change the Flutter version is as simple as changing the git branch.
flutter channel <branch> (example: flutter channel stable)
This command is used to change between branches – usually stable/dev/beta/master. We can also put a specific commit id from git.
flutter downgrade <version> (example: flutter downgrade v1.2.1)
This command will use a specific version number. You can have the list of the available version numbers using flutter downgrade
After this, run any Flutter command (such as flutter doctor), and Flutter will take care of downloading/compiling everything required to run this version.