Let gradle cache some build artifacts

[cosven]

Try to fix #153 .

Note that I'm not familiar with Gradle and the code is generated by AI. And the code looks good :)

[CLAassistant]

All committers have signed the CLA.

[FeodorFitsner]

Alright, alright, I've done my homework too and used ChatGPT to check your PR! 😈

Got this:

The pull request #154 introduces changes to the src/serious_python_android/android/build.gradle file to enhance Gradle’s caching of build artifacts. This optimization aims to improve build efficiency by leveraging Gradle’s caching mechanisms.

Key Changes in build.gradle:

Enable Gradle Build Cache:

buildCache {
    local {
        enabled = true
    }
}

I don't know if that setting is real or hallucination, but look at your log in #153 (comment) which says Build cache is disabled.

So, I guess in addition to your changes the build cache should be disabled. Right?

[cosven]

I read the Gradle output carefully and found a way to debug this PR.
I modified the file ~/.pub-cache/hosted/pub.flutter-io.cn/serious_python_android-0.9.2/android/build.gradle and ran flutter run --version again. Unlocky, this PR does not work. The command output looks like the following

[        ]   Gradle does not know how file '/Users/cosven/code/mobile/feeluownx/build/serious_python_android/python-android-arm64-v8a.tar.gz' was created (output property '$1'). Task output caching requires exclusive access to output paths to guarantee correctness (i.e. multiple tasks are not allowed to produce output in the same location).
[        ] Task ':serious_python_android:downloadDistArchive_arm64-v8a' is not up-to-date because:
[        ]   Task.upToDateWhen is false.
[        ] Download https://github.com/flet-dev/python-build/releases/download/v3.12/python-android-dart-3.12-arm64-v8a.tar.gz
[+7549 ms] ensureAnalyticsSent: 252ms
[        ] Running 0 shutdown hooks
[        ] Shutdown hooks complete
[ +108 ms] Running Gradle task 'assembleRelease'... (completed in 12.1s)
[  +31 ms] "flutter apk" took 12,763ms.
[  +93 ms] exiting with code 0

So I spent some time learning the details of the Gradle Download task. There is a parameter named onlyIfModified.

true if the file should only be downloaded if it has been modified on the server since the last download (default: false)

I tried the parameter and it did solve the problem.

[+1989 ms] > Task :serious_python_android:downloadDistArchive_arm64-v8a
[        ] Caching disabled for task ':serious_python_android:downloadDistArchive_arm64-v8a' because:
[        ]   Caching has not been enabled for the task
[        ] Task ':serious_python_android:downloadDistArchive_arm64-v8a' is not up-to-date because:
[        ]   Task.upToDateWhen is false.
[        ] Download https://github.com/flet-dev/python-build/releases/download/v3.12/python-android-dart-3.12-arm64-v8a.tar.gz
[+1004 ms] Not modified. Skipping 'https://github.com/flet-dev/python-build/releases/download/v3.12/python-android-dart-3.12-arm64-v8a.tar.gz'
[        ] > Task :serious_python_android:downloadDistArchive_arm64-v8a UP-TO-DATE

[cosven]

I guess in addition to your changes the build cache should be disabled. Right?

Before, I did not add any settings to disable the Gradle build cache.

I did not modify any settings related to Gradle because I'm not familiar with it :)

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Edit: by the way, I use serious-python in the FeelUOwnX project.