I got this after build succeeded please need your help urgently
-----> Saving Flutter SDK in Cache
-----> dhttpd Found in cache. Restoring.
cp: cannot stat '/tmp/codon/tmp/cache/.pub-cache/*': No such file or directory
! Push rejected, failed to compile https://buildpack-registry.s3.amazonaws.com/buildpacks/diezep/flutter.tgz app.
! Push failed

I use a named routing in my project. If I navigate to the Stacks page, the URL becomes localhost:123/stacks and so on. When I refresh the page locally, the Stacks page opened up. But after deploying to Heroku, after refreshing on stacks page, I get only "Not Found" text.

I think Heroku should redirect all routes to the index.html file.

I found a solution for the Firebase, but can't find one for Heroku:
https://stackoverflow.com/a/51236284/1419756

Thank you!

Compiling the app seems fine:

However in the logs:

2023-05-05T22:56:38.000000+00:00 app[api]: Build succeeded
2023-05-05T22:57:54.483665+00:00 heroku[web.1]: Starting process with command `/app/dart-sdk/bin/dart pub global run dhttpd --host 0.0.0.0 --path /app/`
2023-05-05T22:57:55.455193+00:00 app[web.1]: No active package dhttpd.
2023-05-05T22:57:55.630830+00:00 heroku[web.1]: Process exited with status 65
2023-05-05T22:57:55.672732+00:00 heroku[web.1]: State changed from starting to crashed

Am I missing something?

Not really an issue, just wanted to let you know that we created a Heroku Buildpack for building Flutter Web projects, that is based on Heroku Buildpack Flutter's: Heroku Buildpack Flutter Light.

Initially the idea was to send our changes back to this repo in a Pull Request, but we realized that we needed to make different architectural tradeoffs in a way that's backwards incompatible, which would make it impossible to you to merge the Pull Request (among other things, we removed the server completely). That's why we published this under a different name instead.

Could not find a command named "version".
Run 'flutter -h' (or 'flutter -h') for available flutter commands and options.

Is it possible to turn off null safety in Heroku as some libraries require that?

I found that this pack always try to build the app with the latest flutter version available, tho the docs says that if you set the variable FLUTTER_VERSION it should install it, but it throws an error, out example:

-----> Restoring Flutter SDK from CACHE
Building flutter tool...
-----> Installing Flutter SDK version : 3.13.2
Could not find a command named "version".
Run 'flutter -h' (or 'flutter <command> -h') for available flutter commands and options.

Related to:

• #13
• #12

Idea

The way to install new version of flutter is not using flutter version because that command do not exist, it is bad here:
https://github.com/diezep/heroku-buildpack-flutter/blob/eecebf9581129aa31f587cdf41ec2a3cbf0fdbe4/bin/compile#L48C11-L48C26

Hi,
I am working on a flutter project that i want to deploy on heroku using your buildpack. I followed other steps, after running heroku buildpacks:set diezep/flutter -a and get the meesage
Buildpack set. Next release on herokuappname will use diezep/flutter.
Run git push heroku main to create a new release using this buildpack.
I run this command git push heroku master:main
Results
Enumerating objects: 97, done.
Counting objects: 100% (97/97), done.
Delta compression using up to 8 threads
Compressing objects: 100% (79/79), done.
Writing objects: 100% (97/97), 56.05 KiB | 2.24 MiB/s, done.
Total 97 (delta 7), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Building on the Heroku-20 stack
remote: -----> https://buildpack-registry.s3.amazonaws.com/buildpacks/diezep/flutter.tgz app detected
remote: -----> Installing SDK from Github repository.
remote: -----> Running flutter upgrade command
remote: Downloading Dart SDK from Flutter engine 609036f2bf7cae17a0b88c21fb3bdaff7159b713...
remote: % Total % Received % Xferd Average Speed Time Time Time Current
remote: Dload Upload Total Spent Left Speed
remote: 100 190M 100 190M 0 0 92.6M 0 0:00:02 0:00:02 --:--:-- 92.6M
remote: Building flutter tool...
remote:
remote: ╔════════════════════════════════════════════════════════════════════════════╗
remote: ║ Welcome to Flutter! - https://flutter.dev ║
remote: ║ ║
remote: ║ The Flutter tool uses Google Analytics to anonymously report feature usage ║
remote: ║ statistics and basic crash reports. This data is used to help improve ║
remote: ║ Flutter tools over time. ║
remote: ║ ║
remote: ║ Flutter tool analytics are not sent on the very first run. To disable ║
remote: ║ reporting, type 'flutter config --no-analytics'. To display the current ║
remote: ║ setting, type 'flutter config'. If you opt out of analytics, an opt-out ║
remote: ║ event will be sent, and then no further information will be sent by the ║
remote: ║ Flutter tool. ║
remote: ║ ║
remote: ║ By downloading the Flutter SDK, you agree to the Google Terms of Service. ║
remote: ║ Note: The Google Privacy Policy describes how data is handled in this ║
remote: ║ service. ║
remote: ║ ║
remote: ║ Moreover, Flutter includes the Dart SDK, which may send usage metrics and ║
remote: ║ crash reports to Google. ║
remote: ║ ║
remote: ║ Read about data we send with crash reports: ║
remote: ║ https://flutter.dev/docs/reference/crash-reporting ║
remote: ║ ║
remote: ║ See Google's privacy policy: ║
remote: ║ https://policies.google.com/privacy ║
remote: ╚════════════════════════════════════════════════════════════════════════════╝
remote:
remote: Downloading Material fonts... 502ms
remote: Downloading Gradle Wrapper... 12ms
remote: Downloading package sky_engine... 139ms
remote: Downloading flutter_patched_sdk tools... 1,076ms
remote: Downloading flutter_patched_sdk_product tools... 914ms
remote: Downloading linux-x64 tools... 2,081ms
remote: Downloading linux-x64/font-subset tools... 416ms
remote: Switching to flutter channel 'beta'...
remote: git: Switched to a new branch 'beta'
remote: git: Branch 'beta' set up to track remote branch 'beta' from 'origin'.
remote: Successfully switched to flutter channel 'beta'.
remote: To ensure that you're on the latest build from this channel, run 'flutter upgrade'
remote: Downloading Dart SDK from Flutter engine 7a8f8ca02c276dce02f8dd42a44e776ac03fa9bc...
remote: % Total % Received % Xferd Average Speed Time Time Time Current
remote: Dload Upload Total Spent Left Speed
remote: 100 173M 100 173M 0 0 98.5M 0 0:00:01 0:00:01 --:--:-- 98.4M
remote: Building flutter tool...
remote:
remote: ╔════════════════════════════════════════════════════════════════════════════╗
remote: ║ Welcome to Flutter! - https://flutter.dev ║
remote: ║ ║
remote: ║ The Flutter tool uses Google Analytics to anonymously report feature usage ║
remote: ║ statistics and basic crash reports. This data is used to help improve ║
remote: ║ Flutter tools over time. ║
remote: ║ ║
remote: ║ Flutter tool analytics are not sent on the very first run. To disable ║
remote: ║ reporting, type 'flutter config --no-analytics'. To display the current ║
remote: ║ setting, type 'flutter config'. If you opt out of analytics, an opt-out ║
remote: ║ event will be sent, and then no further information will be sent by the ║
remote: ║ Flutter tool. ║
remote: ║ ║
remote: ║ By downloading the Flutter SDK, you agree to the Google Terms of Service. ║
remote: ║ Note: The Google Privacy Policy describes how data is handled in this ║
remote: ║ service. ║
remote: ║ ║
remote: ║ Moreover, Flutter includes the Dart SDK, which may send usage metrics and ║
remote: ║ crash reports to Google. ║
remote: ║ ║
remote: ║ Read about data we send with crash reports: ║
remote: ║ https://flutter.dev/docs/reference/crash-reporting ║
remote: ║ ║
remote: ║ See Google's privacy policy: ║
remote: ║ https://policies.google.com/privacy ║
remote: ╚════════════════════════════════════════════════════════════════════════════╝
remote:
remote: Flutter is already up to date on channel beta
remote: Flutter 1.25.0-8.3.pre • channel beta • https://github.com/flutter/flutter.git
remote: Framework • revision 5d36f2e7f5 (3 days ago) • 2021-01-14 15:57:49 -0800
remote: Engine • revision 7a8f8ca02c
remote: Tools • Dart 2.12.0 (build 2.12.0-133.7.beta)
remote: -----> Enabling Web support
remote: Setting "enable-web" value to "true".
remote:
remote: You may need to restart any open editors for them to read new settings.
remote: -----> Running flutter clean command.
remote: Downloading package sky_engine... 501ms
remote: Downloading flutter_patched_sdk tools... 1,077ms
remote: Downloading flutter_patched_sdk_product tools... 932ms
remote: Downloading linux-x64 tools... 2,045ms
remote: Downloading linux-x64/font-subset tools... 293ms
remote: -----> Getting packages from Flutter project
remote: Running "flutter pub get" in build_b95615a5... 2,020ms
remote: -----> Compiling the project.
remote: Downloading Web SDK... 3.3s
remote: Missing index.html.
remote: -----> Saving Flutter SDK in Cache
remote: mv: cannot stat 'TO_DELETE/build/web/*': No such file or directory
remote: ! Push rejected, failed to compile https://buildpack-registry.s3.amazonaws.com/buildpacks/diezep/flutter.tgz app.
remote:
remote: ! Push failed
remote: !
remote: ! ## Warning - The same version of this code has already been built: 75d32182cfb0a7726f81e693171f09d0190a4679
remote: !
remote: ! We have detected that you have triggered a build from source code with version 75d32182cfb0a7726f81e693171f09d0190a4679
remote: ! at least twice. One common cause of this behavior is attempting to deploy code from a different branch.
remote: !
remote: ! If you are developing on a branch and deploying via git you must run:
remote: !
remote: ! git push heroku :main
remote: !
remote: ! This article goes into details on the behavior:
remote: ! https://devcenter.heroku.com/articles/duplicate-build-version
remote:
remote: Verifying deploy...
remote:
remote: ! Push rejected to herokuappname.
remote:
To https://git.heroku.com/houseofdani.git
! [remote rejected] master -> main (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/herokuappnamegit'

May you assist

Hello there, I would really appreciate if you'd implement the SUBDIR environment variable soon, because otherwise I can't use this buildpack (and I have to if I want to test with heroku). It would really help alot :)

I keep getting this error when on Flutter 2.10.0-0.2.pre • channel beta and i can't figure out how to switch to the stable version.

I've set the environment variable to the latest stable version and it keeps going back to 2.10.0-0.2.pre.

remote: Target dart2js failed: Exception: /app/.pub-cache/hosted/pub.dartlang.org/platform-3.0.2/lib/src/interface/local_platform.dart:46:19: remote: Error: Member not found: 'packageRoot'. remote: io.Platform.packageRoot; // ignore: deprecated_member_use remote: ^^^^^^^^^^^ remote: Error: Compilation failed.

Any help would be really appreciated.

@diezep

Hi there, I'm trying this build-pack but I have a build error about json_serializable library. It needs to run flutter pub run build_runner build. How can i achieve that? Maybe my app configuration is wrong, i'm also new at flutter.

part 'subscription.g.dart';

     ^

lib/models/subscription.dart:3:6:

Error: Can't use 'lib/models/subscription.g.dart' as a part, because it has no 'part of' declaration.

part 'subscription.g.dart';

     ^

lib/models/subscription.dart:13:7:

Error: Method not found: '_$SubscriptionFromJson'.

      _$SubscriptionFromJson(json);

      ^^^^^^^^^^^^^^^^^^^^^^

lib/models/subscription.dart:15:36:

Error: The method '_$SubscriptionToJson' isn't defined for the class 'Subscription'.

 - 'Subscription' is from 'package:trade_bot/models/subscription.dart' ('lib/models/subscription.dart').

  Map<String, dynamic> toJson() => _$SubscriptionToJson(this);

                                   ^^^^^^^^^^^^^^^^^^^^

Error: Compilation failed.