about "flutter.compileSdkVersion"

[otofu128]

(I'm a beginner in development and English. I'm sorry if I said the wrong thing.)

Hello,

sqflite/android/build.gradle
Line 25
compileSdk = flutter.compileSdkVersion

1. Previously it was compileSdk 34. Why did we change it?
2. Is the grammar correct? Is the "=" necessary?

[davidmartos96]

Are you having issues with that? I changed it so that it evolves along the Flutter version you are using.
Which one are you using in your project?

[otofu128]

I found something.

In conclusion, flutter build apk succeeds with Flutter SDK Version 3.27.4 or higher. Build fails with versions lower than 3.27.4.

Here is the repository with the code used in the experiment:
https://github.com/otofu128/some-flutter-versions

I tried the following:

• Create projects with several Flutter SDK Versions
  • Target versions: 3.22.3, 3.24.5, 3.27.4, 3.29.3, 3.32.7
• Add sqflite_sqlcipher to each project
• Build each project with the same Flutter SDK version used when creating it

The results are as follows:

• 3.22.3: NG
• 3.24.5: NG
• 3.27.4: OK
• 3.29.3: OK
• 3.32.7: OK

The NG Flutter SDK versions output the same error log:

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* Where:
Build file '/Users/$USER/.pub-cache/hosted/pub.dev/sqflite_sqlcipher-3.2.0/android/build.gradle' line: 25

* What went wrong:
A problem occurred evaluating project ':sqflite_sqlcipher'.
> Could not get unknown property 'flutter' for extension 'android' of type com.android.build.gradle.LibraryExtension.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
==============================================================================

2: Task failed with an exception.
-----------
* What went wrong:
A problem occurred configuring project ':sqflite_sqlcipher'.
> Failed to notify project evaluation listener.
   > Cannot invoke method substring() on null object
   > compileSdkVersion is not specified. Please add it to build.gradle

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
==============================================================================

BUILD FAILED in 424ms
Running Gradle task 'assembleRelease'...                           897ms
Gradle task assembleRelease failed with exit code 1

Before running flutter build apk, I execute the following commands:

• flutter clean
• flutter pub cache clean -f
• flutter pub get
• rm -rf $HOME/.gradle/caches
• rm -rf $HOME/.gradle/daemon
• (in the android directory) ./gradlew clean

[davidmartos96]

I see. Thank you! I'll revert it.

[davidmartos96]

@otofu128 After some investigation, keeping flutter.compileSdkVersion seems the best option.
On August 31st, apps will require to target Android SDK 35+, and Flutter 3.24 targets version 34.
What I will do is update the plugin to require Flutter version 3.27 so that it doesn't cause confusion when building.

[hammadx02]

Good question! The line:

compileSdk = flutter.compileSdkVersion

is using Gradle's Kotlin DSL syntax. The = is correct here.

Previously, compileSdk 34 was written in Groovy DSL. When migrating to Kotlin DSL, we use = for assignments.

Both set the compile SDK version, but the syntax changes because of the build script language.