How can I still run a Flutter app on release mode on my machine?

[mregnauld]

Following the documentation, especially the Signing Android apps using Gradle part, I modified the android/app/build.gradle file.

So now, it looks like the following:

    signingConfigs {
        release {
            if (System.getenv()["CI"]) { // CI=true is exported by Codemagic
                storeFile file(System.getenv()["CM_KEYSTORE_PATH"])
                storePassword System.getenv()["CM_KEYSTORE_PASSWORD"]
                keyAlias System.getenv()["CM_KEY_ALIAS"]
                keyPassword System.getenv()["CM_KEY_PASSWORD"]
            } else {
                keyAlias keystoreProperties['keyAlias']
                keyPassword keystoreProperties['keyPassword']
                storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
                storePassword keystoreProperties['storePassword']
            }
        }
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
        }
    }

But here is my problem now: how can I still run my app on release mode for testing purposes (or run flutter run --release on my machine) without any error?

Thanks.

[mregnauld]

OK so after some research, here is how I managed to make it work:

1. Using the terminal:

cd android
keytool -genkey -v -alias androiddebugkey -keystore keystore.p12 -storetype PKCS12 -storepass android -keypass android -keyalg RSA -keysize 4096 -validity 10000

2. In the android/app/build.gradle file:

    signingConfigs {
        debug {
            keyAlias "androiddebugkey"
            keyPassword "android"
            storeFile file("../keystore.p12")
            storePassword "android"
        }
        release {
            if (System.getenv()["CI"]) // CI=true is exported by Codemagic
            {
                storeFile file(System.getenv()["CM_KEYSTORE_PATH"])
                storePassword System.getenv()["CM_KEYSTORE_PASSWORD"]
                keyAlias System.getenv()["CM_KEY_ALIAS"]
                keyPassword System.getenv()["CM_KEY_PASSWORD"]
            }
            else
            {
                keyAlias "androiddebugkey"
                keyPassword "android"
                storeFile file("../keystore.p12")
                storePassword "android"
            }
        }
    }
    buildTypes {
        debug {
            signingConfig signingConfigs.debug
        }
        profile {
            signingConfig signingConfigs.release
        }
        release {
            signingConfig signingConfigs.release
        }
    }

Now I can run my app in debug, profile and release mode on my computer without any problem.