I wrote some Groovy code, and I'd like to integrate it with the existing Java code. We'd like to be able to keep our ant scripts, and only add the needed Groovy functionality. Will Gant allow us to keep our existing scripts?
According to the Gant site, no:
Gant is a tool for scripting Ant tasks using Groovy instead of XML to specify the logic. A Gant specification is a Groovy script ...
A Gant build script uses Groovy script, not XML, but it uses the Ant tasks. Therefore if you have any custom Ant tasks you will still be able to use those.
Perhaps you could give more detail about what you want to do.
You can call normal Ant scripts from Gant and vice-versa.
You can also use the groovy ant task to run arbitrary Groovy in your normal (or Gant-flavored) ant builds.
The following doesn't answer the question with respect to Gant,
but it might help with the problem:
Gradle is a Groovy-build tool. It is more sophisticated than Gant.
I've blogged on this here.
From the Gradle FAQ (here):
Gradle can import any Ant build
script. Gradle integrates deeply with
an Ant build. Every Ant target is
represented as a Gradle task. This task
can be further enhanced in your Gradle
build script.
Related
(Gradle version 7.3.3)
I'm following the documentation
regarding the gradle precompiled scripts plugins.
Plugin to use
The groovy-gradle-plugin is used in this case.
I tried with the java-gradle-pluginbut it doesn't seem to generate the plugin classes.
Is this to be expected?
Plugins id's
Following the documentation:
src/main/groovy/my.java-library-convention.gradle would result in a
plugin ID of my.java-library-convention.
I want to prefix my scripts with: com.mycompany.myproject.conventions-java-library
In this case, the generated plugin classes are named with this full name in the default package.
Is this to be expected?
I expected to find a class named JavaLibraryPlugingenerated in the com.mycompany.myproject.conventionspackage
The groovy-gradle-plugin is used in this case. I tried with the java-gradle-plugin but it doesn't seem to generate the plugin classes. Is this to be expected?
Not fully sure what you are asking.
If you meant applying the java-gradle-plugin instead of the groovy-gradle-plugin, this of course will not produce any plugin classes. How should the Java plugin know about Groovy source files?
Why I'm not sure whether that is what you asked is, because the groovy-gradle-plugin already automatically applies the java-gradle-plugin. So if you want to use Groovy DSL precompiled script plugins, just apply the groovy-gradle-plugin as documented.
Plugins id's
For Groovy DSL precompiled script plugins you can only follow that convention if I remember correctly. With Kotlin DSL precompiled script plugins you can either follow that naming convention or you can also use package statements inside the script to "properly model" the plugin id.
I have a legacy java project build with ant, and i need to migrate it to gradle using eclipse.
The thing is that I need to migrate all the project, not only convert the ant targets to gradle tasks.
My question is, where do i start? there's a list of steps to follow?
Have you tried it step by step according to this https://docs.gradle.org/current/userguide/migrating_from_ant.html instruction? There are a lot of examples and it looks pretty clear
Is it possible to have in the same solution a project in Java, another in Python and another in Scala? Or all the projects must be either in Java either in Scala?
You can mix Java and Scala in a single Maven project. Read the following tutorial for more information:
Scala with Maven
Python and Maven: well python doesn't need to be compiled like Java or Scala code does. Instead, python project building is about resolving dependencies, running unit tests, creating installables and so on. Unfortunately, python has its own way of doing these things that different from Maven. To the extent that it probably doesn't make much sense for Maven to manage python code.
Having said that, you can "lightly integrate" python into a Maven build system by having Maven run a setup.py script as an external command. Here is an article that describes this approach:
Python & Java: a unified build process (1/4)
I need to execute a maven plugin on a system that does not have both maven and java installed and installing both of them on the system is not an option. While searching for the ways, I found out that by using gradle we can build executable binaries that does not even require gradle to get executed, which perfectly fits my situation :) . Is there any way to execute maven plugins by using gradle. Thanks in advance
Java is required for Maven and for Gradle too.
You can use Maven Wrapper exactly like with Gradle.
Execute this command in project directory (this creates executable script like in gradle)
mvn -N io.takari:maven:wrapper
To invoke this project without maven installed use:
./mvnw GOAL
Gradle is a build system. You can build anything with it, including native binaries.
And yes, you can call Maven Plugins from Gradle, as Maven Plugins are written in Java and Gradle is based on Groovy and thus on Java.
But both facts have nothing to do with each other.
You can of course also use Gradle (or any other build system including manually stuffing things together) to build a distributable that includes a Java runtime environment. But then Java is, as said, shipped with your result. You cannot run Java code without having Java around, besides porting the Java code to something else like C++ that compiles to a native binary.
Yes, you can also call Java code from native code if you do some glueing, but no, also this will not work without having Java around, because that's the way Java works.
Both Maven and Gradle require java to be installed. See https://docs.gradle.org/current/userguide/installation.html
I'm looking for a plugin that would run in a console continuously to scan a Maven project's test sources directory, and when it detects a change kicks off a test cycle. Something analogous to mvn scala:cc or the Scala Build Tool, but for Java. Can anyone point me towards one?
I have personally used sbt even for a java only project just for continuous test feature.
I added a sbt build file to a maven based project and use sbt when developing, but use maven when building the final package, starting embedded jetty etc and this has worked out quite well.
I've just discovered that the scala-maven-plugin supports both continuous compilation & testing, as well as cross-compilation (Java + Scala). So it's possible to use it over a pure Java build and get all the continuous build goodness.
Recently, I have had a need for a solution to this. Having been learning scala and finding about the goodness of sbt ~test, I want to apply it to Java projects that do not have continuous test.
Using the scala-maven-plugin that you mentioned, I have created a github seed that will run Java Junit tests everytime I save a Java source or a Java test.
Check it out:
https://github.com/ailveen/maven-scala-java-continuous-test
The project is very simple right now (contains only Java files because that is my current need) but in the future I hope to add scala test (or specs2 or scalacheck) so it works with mixed java and scala files.
Hope you find it useful.
It is not exactly for Maven, but JUnit Max does continuous testing and if you're on Eclipse it might be the tool you would like to check out