How to add a new library in webauthn-server-core?

[tarun14110]

Hi, I am trying to extend functionality of webauthn-server-core.
I have a local jar that I want to use as a library. I added implementation(files("libtest/target/libtest.jar")) in webauthn-server-core/build.gradle.kts. Then, I added import statement (import org.testlib.*;) in RelyingParty.java.
When I try to build it using ./gradlew build I get error

/Users/java-webauthn-server/webauthn-server-core/src/main/java/com/yubico/webauthn/RelyingParty.java:70: error: package org.testlib does not exist
import org.testlib*;
^
1 error

Task :webauthn-server-core:compileJava FAILED

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':webauthn-server-core:compileJava'.

Compilation failed; see the compiler error output for details.

• 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

Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

See https://docs.gradle.org/8.1.1/userguide/command_line_interface.html#sec:command_line_warnings

BUILD FAILED in 6s
20 actionable tasks: 4 executed, 16 up-to-date

Am I following the right steps to add a dependency?

[emlun]

Hi! I think that should work, assuming your libtest project is a subdirectory of the webauthn-server-core/ directory. Otherwise you'll have to use parent traversal (../../libtest/target/libtest.jar) or an absolute path to your libtest project directory.

You can run Gradle with the --debug option to check if your JAR makes it onto the classpath. For example:

$ ./gradlew :webauthn-server-core:cleanCompileJava
$ ./gradlew :webauthn-server-core:compileJava --debug

For me, this includes one extremely long line that starts with:

2023-05-16T11:10:45.177+0200 [DEBUG] [org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler] Compiler arguments: --release 8 [... rest of line omitted]

and contains a -classpath argument listing the JARs on the classpath during compilation. If your JAR is not listed there, then there's something wrong with the dependency configuration.