Duplicate Maven Dependencies with scope "test" cause build failures

[Patrick Waldschmitt]

Hi,
I just tried to create a sample Project using IntelliJ with the KTor Init Tools.

Creating any Project led to having most dependencies twice in my pom.xml, such as "ktor-server-core" .
One without scope, one with scope "test".
This causes maven to use the test-scoped dependencies only and it won't build the sample application which is not in the test-scope.
Removing the duplictes makes the application build as supposed.

Please provide the dependencies just once in the pom.xml without a scope.
Regards Patrick

[Sergey Mashkov]

Just tried it and it seems to work well, no duplication generated. Tested both IDEA plugin and start.ktor.io

[Patrick Waldschmitt]

I managed to reproduce the issue and will describe it more detailled:
IntelliJ IDEA 2018.2.5 Community Edition on Windows 10 + KTOR Plugin 0.3.4 + Bundled Maven 3.3.9:

1. Generated a Maven Project with Netty, KTOR 1.0.0-beta-3. I also enabled the Wrapper-Checkbox.
2. I selected a few additional Server-Dependencies (Freemarker + Static Content + Metrics).

This leads to a pom.xml that contains one normal dependency and one dependency with scope "test" for each additional ktor-dependency except the netty dependency.

Example:

...
        <dependency>
            <groupId>io.ktor</groupId>
            <artifactId>ktor-server-core</artifactId>
            <version>${ktor_version}</version>
        </dependency>
...
        <dependency>
            <groupId>io.ktor</groupId>
            <artifactId>ktor-server-core</artifactId>
            <version>${ktor_version}</version>
            <scope>test</scope>
        </dependency>
...

This leads to the following error on "mvn clean install":

...
[WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: io.ktor:ktor-server-core:jar -> duplicate declaration of version ${ktor_version} @ line 79, column 21
...
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
...
[ERROR] Failed to execute goal org.jetbrains.kotlin:kotlin-maven-plugin:1.3.0:compile (compile) on project example: Compilation failure: Compilation failure:
[ERROR] C:\Users\neo\IdeaProjects\init-test\src\Application.kt:[3,16] Unresolved reference: application

When I manually remove all test-dependencies that already exist as non-test-dependencies, the build works well.

I'd recommend removing the duplicate test-dependencies from the generated pom.xml, as these are already available as non-test-dependencies and therefore are not needed.

Maybe it's already fixed with the newer version but I'd be glad if you'd check it.

[Sergey Mashkov]

Most likely it is fixed already in the latest plugin 1.0.0

[Patrick Waldschmitt]

Fix confirmed. Version 1.0.0 works. Good work.