SDL2/Gradle bootstrap

[tito]

This is a new SDL2 bootstrap, using gradle for building instead of ant. It can handle natively .aars (Android archive fragments), and external dependencies (fetch & compilation).

Because gradle is something new to everyone here (and me), let's just have a note about how the project structure is different:

Files removed:

ant.properties
build.xml
custom_rules.xml

Files/directory moved:

AndroidManifest.xml -> src/main/AndroidManifest.xml
assets -> src/main/assets
libs [.jar] -> src/main/libs
libs [.so] -> src/main/jniLibs
res -> src/main/res
src -> src/main/java

The jni directory in the root folder should stay for the moment (it should be in src/main/jni), but i get ndkBuild works with Android.mk within jni directory (aka, i can't pass any options)).

[tito]

Well, it works with my app that includes aars + specific gradle dependencies.
Woot woot!

Someone care to test if standard build are not broken?
If not, then we could merge this as it is for now :)

[inclement]

Almost everything works fine, but I get an error that seems to be related to a failure to download gradle:

Downloading https://services.gradle.org/distributions/gradle-3.3-all.zip

Exception in thread "main" javax.net.ssl.SSLException: java.security.ProviderException: java.security.InvalidKeyException: EC parameters error
	at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1914)
	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1872)
	at sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1855)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1376)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1353)
	at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1348)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
	at org.gradle.wrapper.Download.downloadInternal(Download.java:56)
	at org.gradle.wrapper.Download.download(Download.java:42)
	at org.gradle.wrapper.Install$1.call(Install.java:57)
	at org.gradle.wrapper.Install$1.call(Install.java:44)
	at org.gradle.wrapper.ExclusiveFileAccessManager.access(ExclusiveFileAccessManager.java:65)
	at org.gradle.wrapper.Install.createDist(Install.java:44)
	at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:126)
	at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:56)
Caused by: java.security.ProviderException: java.security.InvalidKeyException: EC parameters error
	at sun.security.pkcs11.P11Key$P11ECPublicKey.getEncodedInternal(P11Key.java:1024)
	at sun.security.pkcs11.P11Key.equals(P11Key.java:158)
	at java.util.ArrayList.indexOf(ArrayList.java:298)
	at java.util.ArrayList.contains(ArrayList.java:281)
	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:239)
	at sun.security.validator.Validator.validate(Validator.java:260)
	at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:326)
	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:231)
	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:126)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1459)
	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:213)
	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:961)
	at sun.security.ssl.Handshaker.process_record(Handshaker.java:897)
	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1033)
	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1342)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1369)
	... 13 more
Caused by: java.security.InvalidKeyException: EC parameters error
	at sun.security.ec.ECParameters.getAlgorithmParameters(ECParameters.java:284)
	at sun.security.ec.ECPublicKeyImpl.<init>(ECPublicKeyImpl.java:59)
	at sun.security.pkcs11.P11Key$P11ECPublicKey.getEncodedInternal(P11Key.java:1021)
	... 28 more
Caused by: java.security.NoSuchProviderException: no such provider: SunEC
	at sun.security.jca.GetInstance.getService(GetInstance.java:83)
	at sun.security.jca.GetInstance.getInstance(GetInstance.java:206)
	at java.security.Security.getImpl(Security.java:697)
	at java.security.AlgorithmParameters.getInstance(AlgorithmParameters.java:199)
	at sun.security.ec.ECParameters.getAlgorithmParameters(ECParameters.java:279)
	... 30 more

The error persists after I install gradle locally. I'll look into it but I haven't used gradle before and I'm not sure what to look for, did you have any problems like this?

Edit: I got gradle itself to run by installing it locally and running directly 'gradle assembleDebug', but it says I haven't agreed to some license agreements. I'll work out how to do that, but not right now. The above error still stands as well.

[inclement]

Does this function actually get called from somewhere? I see the ant/gradle build stuff is handled elsewhere.

[inclement]

I'm closing this in favour of #1071, which combines everything into the existing sdl2 bootstrap in such a way that both ant and gradle can work. It all seems to work though, and I intend to merge it after doing a release.