Current problem with pre-build scripts?

[schox]

If you are looking for help, please confirm the following...

• I confirm I have searched the Docs, Codemagic Sample Projects, and GitHub Discussions.
• I confirm the software versions on my local computer match the ones in CI environment (e.g. Xcode version, Gradle version). See here
• I confirm I am able to do a fresh clone of the repository and build the project on my local computer.

Which mobile framework are you using?

Flutter (Dart)

Steps to reproduce

Pre-build script appears to have stopped working?

It was working fine yesterday and then a subsequent build generated the error:

Error (Xcode): lib/env/envied.dart:3:6: Error: Error when reading 'lib/env/envied.g.dart': No such file or directory

On inspection of the build script logs I see:

[INFO] Generating build script...
[INFO] Generating build script completed, took 176ms
[INFO] Precompiling build script......
[INFO] Precompiling build script... completed, took 2.1s
[INFO] Initializing inputs
[INFO] Building new asset graph...
[INFO] Building new asset graph completed, took 1.0s
[INFO] Checking for unexpected pre-existing outputs....
[INFO] Checking for unexpected pre-existing outputs. completed, took 0ms
[INFO] Running build...
[INFO] Running build completed, took 2ms
[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 52ms
[INFO] Succeeded after 59ms with 0 outputs (0 actions)

So no actual file generation appears to have happened.

Yesterday, I was using this version of envied.dart (which should get picked up by build_runner to generate envied.g.dart.

import 'package:envied/envied.dart';

part 'envied.g.dart';

@Envied(
  path: bool.fromEnvironment('CI') ? null : '.env.prod',
)
abstract class Env {
    @EnviedField(varName: 'ONESIGNAL_APP_ID')
    static const String ONESIGNAL_APP_ID = _Env.ONESIGNAL_APP_ID;

…

}

And in the Pre-build script I was just calling:

dart run build_runner build --delete-conflicting-outputs

Once the error occured I changed envied.dart to:

import 'package:envied/envied.dart';

part 'envied.g.dart';

@Envied(path: '.env.prod')
abstract class Env {
    @EnviedField(varName: 'ONESIGNAL_APP_ID')
    static const String ONESIGNAL_APP_ID = _Env.ONESIGNAL_APP_ID;

…

}

And tried this instead in the script:

#!/usr/bin/env bash

# Clean previous build artifacts
flutter clean

# Create the .env.prod file with environment variables
tee -a .env.prod << EOF
ONESIGNAL_APP_ID=$ONESIGNAL_APP_ID
RC_GOOGLE_API_KEY=$RC_GOOGLE_API_KEY
RC_APPLE_API_KEY=$RC_APPLE_API_KEY
SUPABASE_URL=$SUPABASE_URL
SUPABASE_ANON_KEY=$SUPABASE_ANON_KEY
SUPABASE_BASE_URL=$SUPABASE_BASE_URL
SENTRY_DSN=$SENTRY_DSN
EOF

# Output the .env.prod file for verification
echo "Contents of .env.prod:"
cat .env.prod

# Install dependencies
flutter pub get

# Run build_runner to generate the necessary files
dart run build_runner build --delete-conflicting-outputs

In both cases the project builds and funs fine locally on a simulator.

Expected results

The build script should run build_runner and generate the necessary .g.dart file.

Actual results

No output is generated, which gives rise to the file not found error in the build process.

Build id (optional)

No response

[himesh-cm]

Hey @schox,
Can you please share the build ID with me? You can find it under your build details page's 'ID' section. 
Navigate to the 'Builds' section on the left-hand menu, select the build you want to view, and click the copy icon.

[himesh-cm]

Please share the build ID with me. The one you shared earlier uses dart instead of flutter.

[schox]

Here it is: 66d1bfd2bc682c6ea1d4b060

[himesh-cm]

Hey @schox,

I noticed that your latest build was successful. Are you still in need of assistance? Also, could you please share the solution that worked for you? It might be helpful for others who encounter similar issues.

[schox]

Yes it is now successfully building, using both versions of the pre-build script I originally described in the issue:

I'm not certain what fixed it, but I have noticed that I occasionally need to run:

flutter pub run build_runner clean

before:

flutter pub run build_runner build --delete-conflicting-outputs

on local builds if the envied.g.dart does not get generated correctly. Perhaps this applies to Codemagic builds too. I haven't found a repeatable pattern here.

Also the only other file I edited during this period was pubspec.yaml. Maybe there was an extraneous character under here somewhere:

dev_dependencies:
build_runner: ^2.4.9
custom_lint: ^0.6.4
flutter_launcher_icons: ^0.13.1
envied_generator: ^0.5.4+1

Sorry to not have more a specific, repeatable solution.

[himesh-cm]

Thanks for sharing the feedback.
While I’m closing our discussion for now, if you have any other questions or suggestions, feel free to reply back or start a new discussion anytime. Have a nice day!