Adds Flutter Template

[alberrizwan]

This is draft release of Flutter template.
Please note:
To manually attach to the device for debugging, follow these steps:

1. SSH into the device and run docker logs .
2. Find the Observatory URL in the logs.
3. Open another SSH terminal and set up port forwarding using this command: ssh -L port:127.0.0.1:port user@deviceIP, where port corresponds to the one in the Observatory URL.
4. Once port forwarding is established, open the Observatory URL in a web browser.
5. You can now start debugging using the web debugger.

Signed-off-by: alber.rizwan@crossware.io

[andreriesco]

Hello @alberrizwan,
Sorry for taking a bit of time to the PR review, we are on the process of a new major release of Torizon (Torizon 7).
I created a project form the template and tried to build it, but fell into the following issue:

 *  Executing task: DOCKER_HOST= docker compose build --pull --build-arg SSHUSERNAME=torizon --build-arg APP_ROOT=/home/torizon/app --build-arg IMAGE_ARCH=arm64 --build-arg DEBUG_SSH_PORT= --build-arg GPU=-vivante testflutter-debug 

WARN[0000] The "DOCKER_LOGIN" variable is not set. Defaulting to a blank string. 
WARN[0000] /home/andreriesco/Documents/IDE2.0/test-applications/testFlutter/docker-compose.yml: the attribute `version` is obsolete, it will be ignored, please remove it to avoid potential confusion 
[+] Building 2.6s (3/3) FINISHED                                        docker-container:sharp_murdock
 => [testflutter-debug internal] load build definition from Dockerfile.debug                      0.3s
 => => transferring dockerfile: 1.23kB                                                            0.0s
 => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 26)                   0.3s
 => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 36)                   0.3s
 => ERROR [testflutter-debug internal] load metadata for crossware.app:5050/toradex/flutter:runt  2.1s
 => CANCELED [testflutter-debug internal] load metadata for crossware.app:5050/toradex/flutter:e  2.1s
------
 > [testflutter-debug internal] load metadata for crossware.app:5050/toradex/flutter:runtime_debug:
------
failed to solve: crossware.app:5050/toradex/flutter:runtime_debug: failed to resolve source metadata for crossware.app:5050/toradex/flutter:runtime_debug: failed to authorize: failed to fetch anonymous token: unexpected status from GET request to https://crossware.app/jwt/auth?scope=repository%3Atoradex%2Fflutter%3Apull&service=container_registry: 403 Forbidden

 *  The terminal process "/usr/bin/bash '-c', 'DOCKER_HOST= docker compose build --pull --build-arg SSHUSERNAME=torizon --build-arg APP_ROOT=/home/torizon/app --build-arg IMAGE_ARCH=arm64 --build-arg DEBUG_SSH_PORT= --build-arg GPU=-vivante testflutter-debug'" terminated with exit code: 17. 
 *  Terminal will be reused by tasks, press any key to close it. 

It seems that the base container is not publicly available.

[andreriesco]

Hello @alberrizwan,
Any updates on this issue?

[alberrizwan]

Hello @andreriesco,
Sorry for the delayed response, I have made the requested changes please check and let us know if any more changes are required.

[andreriesco]

Hello @alberrizwan,
Thanks, now I was able to get the base images and run the application.
But I have an issue to debug the application. I followed the steps do debug it, but I am falling into the following error:

$ dart devtools http://127.0.0.1:43739/k8IUol2dnPI=/
WebSocketException: Connection to 'http://127.0.0.1:43739/k8IUol2dnPI=/ws#' was not upgraded to websocket, HTTP status code: 403
#0      _WebSocketImpl.connect (dart:_http/websocket_impl.dart:1011:41)
#1      WebSocket.connect (dart:_http/websocket.dart:320:22)
#2      vmServiceConnectUriWithFactory (package:vm_service/vm_service_io.dart:26:44)
#3      vmServiceConnectUri (package:vm_service/vm_service_io.dart:12:10)
#4      DevToolsCommand.maybeStartDDS (package:dartdev/src/commands/devtools.dart:192:29)
#5      DevToolsCommand._performDDSCheck (package:dartdev/src/commands/devtools.dart:106:19)
<asynchronous suspension>
#6      DevToolsCommand.run (package:dartdev/src/commands/devtools.dart:57:21)
<asynchronous suspension>
#7      CommandRunner.runCommand (package:args/command_runner.dart:212:13)
<asynchronous suspension>
#8      DartdevRunner.runCommand (package:dartdev/dartdev.dart:240:18)
<asynchronous suspension>
#9      runDartdev (package:dartdev/dartdev.dart:47:16)
<asynchronous suspension>
#10     main (file:///b/s/w/ir/x/w/sdk/pkg/dartdev/bin/dartdev.dart:13:5)
<asynchronous suspension>

And even if I try to disable-service-auth-codes (and also set a fixed port, as explained in this article), I still get an error (but with error code 200):

dart devtools http://127.0.0.1:12345/k8IUol2dnPI=/
WebSocketException: Connection to 'http://127.0.0.1:12345/k8IUol2dnPI=/ws#' was not upgraded to websocket, HTTP status code: 200
#0      _WebSocketImpl.connect (dart:_http/websocket_impl.dart:1011:41)
#1      WebSocket.connect (dart:_http/websocket.dart:320:22)
#2      vmServiceConnectUriWithFactory (package:vm_service/vm_service_io.dart:26:44)
#3      vmServiceConnectUri (package:vm_service/vm_service_io.dart:12:10)
#4      DevToolsCommand.maybeStartDDS (package:dartdev/src/commands/devtools.dart:192:29)
#5      DevToolsCommand._performDDSCheck (package:dartdev/src/commands/devtools.dart:106:19)
<asynchronous suspension>
#6      DevToolsCommand.run (package:dartdev/src/commands/devtools.dart:57:21)
<asynchronous suspension>
#7      CommandRunner.runCommand (package:args/command_runner.dart:212:13)
<asynchronous suspension>
#8      DartdevRunner.runCommand (package:dartdev/dartdev.dart:240:18)
<asynchronous suspension>
#9      runDartdev (package:dartdev/dartdev.dart:47:16)
<asynchronous suspension>
#10     main (file:///b/s/w/ir/x/w/sdk/pkg/dartdev/bin/dartdev.dart:13:5)
<asynchronous suspension>

Do you know what may be possible issue?