Modify a Gradle plugin classpath - kotlin

I've written a new generator for openapi:
https://openapi-generator.tech/docs/customization
and I've published it to my local maven repository. I'm running into a problem incorporating my custom generator into the the openapi generator plugin. Basically, according to the link above i can run
java -cp "path_to_my_gen.jar;path_to_openapi.jar" (openApi args)
and it works no problem. I don't know how to replicate this in gradle. I'd like to be able to keep using the gradle plugin for openapi-generator with my new custom generator. To achieve that i think i need to add my now packaged custom generator to the plugin? Or maybe the openapi-generator .jar under the plugin? I'm not sure if that's possible, there is:
https://github.com/OpenAPITools/openapi-generator/issues/6190
which has two solutions that seem promising, but the version of gradle i'm using seems to not recognize some of the keywords, "classpath" in particular. Any suggestions are appreciated.

Related

Intellij Idea 12 gradle build

I am trying to build a project with gradle from within Intellij Idea 12 (commercial editon) but this keeps failing. I have the gradle plugin enabled and also the gradle gui plugin. The native project gradle import is working. (I'm not using gradle idea btw.)
When using the bash I only run gradle war to build my web application. Now I want to do the same from within Intellij.
The gradle gui plugin seems to be using the wrong JDK (I guess it's the one Idea uses, a 1.6 JDK) and therefor fails to compile because this is a JDK 1.7 project. And it doesn't integrate well into Idea because it seems like an external build process (like triggering external ant tasks).
What I have done so far is to configure my own artifact in a way that is equivalent to the one gradle war would have build. But that means a lot of configuration and simply feels wrong. There should be a better way?
So what do I have to do to make Idea compile a project in a way similar to the command line gradle task?
JetGradle plugin doesn't provide native tasks support at the moment. It's scheduled for v.12.1 - IDEA-95897. Feel free to track the plugin's news and update it manually as soon as corresponding support is provided.

Migration from Maven 2/3 to Gradle

I have been looking into Gradle and looks pretty interesting. I think being able to write your scripts in any other language than XML is pretty cool, and it is not clear to me whether polyglot Maven POM files are still a feasible option.
I am working on a project that uses Maven 2.2.1 as build tool. This project:
is multi-module
uses (also our own) plugins
relies on an Artifactory proxy repository
Are there any experiences out there on migrations from Maven to Gradle? Gotchas, pain points, corner cases? Any sort of experience is very welcome.
The migration from Maven to Gradle isn't as easy as from Ant to Maven (at the least at the moment). You can easily reuse Ant scripts and make them first class citizens in your Gradle build. There's a task on the Gradle roadmap for deep import of Maven builds as well.
So far I migrated two enterprise Maven builds to Gradle. Both of them were multi-module projects using standard Maven plugins. I basically rewrote the builds the Gradle way which requires at least some knowledge about Gradle. Based on my experience you can easily get the same build running in Gradle as well. Gradle doesn't really box you in here and is fairly flexible. Along the way you might find yourself having to write a custom plugin that doesn't exist yet depending on what Maven plugins you are using. However, there's already a wide breath of plugins out there. So far I haven't run into a real roadblock yet. Even though the Gradle documentation is pretty good you might find yourself reading a lot of Gradle forum posts to find the solution to one of your problems. Some of the standard Maven features are not supported out-of-the-box e.g. a provided scope or WAR inplace. However, there're easy ways around it. I haven't used Artifactory repositories. The ones I dealt with were Nexus repositories. As far as I know the Gradle guys have good support for Artifactory though. Edit: JFrog provides a Artifactory Gradle plugin.
A good way to start is to use the migration tool Maven2Gradle which let's you generate a Gradle script from your Maven build. Personally, I didn't use it yet. I developed the Gradle build side-by-side with the Maven build which didn't cause any trouble. Maven put its
output under target, Gradle under build. Make sure you prepare your team for the change. Let them try out the Gradle build and get familiar with the tool.
Once you are fully migrated you'll be very happy about the maintainability and extensibility of your build. It's very easy to add custom build logic and you're going to be grateful that you left XML-land. In terms of performance you are not going to make a step back as well. The incremental build feature does its job very well.
You may also want to read through this write-up of my experience porting a maven project to gradle.
In the directory where you have pom.xml just run the below command:
gradle init --type pom
This should convert your maven pom.xml to build.gradle
You can always change the buildDir to be 'target' under gradle if you want the build output to go under 'target' instead of 'build' like maven:
buildDir = 'target'
maven2Gradle seems to have been replaced with being able to run gradle init from the command line (though it's a rather experimental feature). It seems to work ok for doing some basic Gradle setup from a Maven project.

Binary output and testing for Eclipse plugins

I am developing an Eclipse plugin and I use maven to coordinate my source structure. In order to compile the plugin I use the tycho extension for maven. However, I was wondering how to execute unitests.
I want to use the surefire plugin for testing as I additionally use a sonar server for source code quality management. Unitests are applyed if I use eclipse-test-plugin as package target. However, I want to make use of the default surefire plugin for applying unitests.
Now I figured out that the src/test/java that contains my unittest packages is read and compiled correctly but written into the wrong output folder. I need to have the tests in target/test-classes. However they are compiled to target/classes.
As I am new to Eclipse plugin development and maven I could not find out how to write the tests to the correct output folder. I've already tried adding and and changing the build.properties of the eclipse-plugin project. It works also fine for other projects that aren't plugin projects and do not make use of tycho.
Any help appreciated.
Regards,
Florian
Unlike standard maven projects, the convention for eclipse plugins/OSGi bundles is to have tests reside in separate projects. This is because there is no such thing as a maven dependency scope "test" in OSGi.
Thus keeping your tests inside the same project as your code under test would force you to mix up test code/dependencies an productive code/dependencies.
As you mentioned, Tycho provides a separate maven packaging type "eclipse-test-plugin" which you should use for dedicated test plugins/fragments. See https://docs.sonatype.org/display/TYCHO/PackagingTypes
There is no support in Tycho for plain unit tests residing in the same project.

How well does m2eclipse deal with maven plugins?

In general, how well does m2eclipse deal with Maven plugins that modify or amend lifecycle phases?
In particular, I have a project that has a maven-clean-plugin extension to remove an extra generated directory (not in target/) using the configuration filesets tag. This works when running mvn at the command line but not when doing a clean in Eclipse. Is there any way to get m2eclipse to process that plugin?
Another example is flexmojos; there's a lot that can be configured with the flexmojo plugin but those parameters don't seem to get imported by m2eclipse.
Is the integration solely ad-hoc? If m2eclipse embeds Maven, why can't the plugins be executed directly using the underlying pom.xml configuration?
In general, how well does m2eclipse deal with Maven plugins that modify or amend lifecycle phases?
Decently, to my experience. At least for plugin bound to phases from the default lifecycle.
In particular, I have a project that has a maven-clean-plugin extension (...). This works when running mvn at the command line but not when doing a clean in Eclipse. Is there any way to get m2eclipse to process that plugin?
What the clean plugin "extension" is doing and what you're doing (calling mvn clean from Eclipse? calling Project > Clean?) is unclear - at least for me. But maybe have a look at MNGECLIPSE-823 or MNGECLIPSE-156. And don't hesitate to clarify :)
Another example is flexmojos; there's a lot that can be configured with the flexmojo plugin but those parameters don't seem to get imported by m2eclipse.
I don't do flex so the above is too vague for me. But providing a more concrete example might help.

How to use Grails Dependency cache in IDE?

Is there a way to use the ivy cache grails dependency DSL creates within an IDE like eclipse or netbeans? Or must I manually add all dependencies to the IDE lib folder?
I've looked into plugins like ivybeans and ivyde, but they seem to require ivy.xml and ivysettings.xml files, which grails does not produce.
The Grails tooling provided by the SpringSource Tool Suite plugin for Eclipse has the functionality you desire. It reads BuildConfig.groovy and modifies the project classpath accordingly.
I just attached the following to the Jira bug.
In snooping around the STS distribution, I found the following code in
C:\springsource\sts-2.3.2.RELEASE\configuration\org.eclipse.osgi\bundles\898\1.cp\src\com\springsource\sts\grails\core\model\GrailsBuildConfig.java
// make sure that we use the Ivy dependency resolution strategy for Grails 1.2
// TODO CD make version number detection more flexible
if (settings.getGrailsVersion().startsWith("1.2")) {
jarFiles.addAll(settings.getTestDependencies());
jarFiles.addAll(settings.getProvidedDependencies());
Based on this find, I tried downgrading my project from Grails 1.3.2 to Grails 1.2 and ran "refresh dependencies". Sure enough, the dependencies were correctly loaded from Ivy.
Looks like someone needs to do the TODO. I can take a stab at it once I figure out how to check out the source code...
IntelliJ syncs dependencies between Grails (form application.properties and BuildConfig.groovy) and the IDE very nicely.