I would like to “extend”, in one maven project, an ant target defined in another Maven Project.
The base project “Project 1” defines an ant build file, with target “BaseDB” that invokes a set of SQL scripts that create a database schema. This project gets built by Maven to a Jar containing the ant build.xml and the dependent SQL scripts.
I would like to define a “Project 2” with an ant build file with a target “ExtensionDB” with depends =”BaseDB,LocalUpdateDB”. That is, ExtensionDB incorporates the BaseDB definitions by reference.
Ive played around with the dependency extensions provided by xmlns:artifact="antlib:org.apache.maven.artifact.ant" without ever being able to resolve anything in Project1/Build.xml (let alone the SQL scripts upon which it is dependent)
Any ideas
I would try to have a lifecycle hook that extract the original Project1/Build.xml from its jar and put it in a place where you can refer it from Project2 build.xml.
(I'm not sure that I fully understand what you're trying to do, but I'd expect the ant extension to resolve the tasks (Java code), not the build.xml file itself.)
Related
I know I should be working with my build.gradle and init.gradle files but I don't know what to write or how to point to my project folder with the pom.xml file.
The first step is to run gradle init in the directory containing the (master) POM. This will convert the Maven build to a Gradle build, generating a settings.gradle file and one or more build.gradle files. For simpler Maven builds, this is all you need to do. For more complex Maven builds, it may be necessary to manually add functionality on the Gradle side that couldn't be converted automatically.
https://guides.gradle.org/migrating-from-maven/
as Peter Niederwieser said:
For more complex Maven builds, it may be necessary to manually add
functionality on the Gradle side that couldn't be converted
automatically.
although you have to write some parts manually by your self. there is an online service that may be an useful tool For complex Maven builds. maven2gradle is a project on github which can convert online dependencies element automatically from maven to gradle scripts.
for using it,
get to maven2gradle . URL
open and select contains of your maven file.
Paste your maven dependencies on the text box in that web page (with
or without the dependencies root element).
click Convert button.
for more information http://sagioto.github.io/maven2gradle/
Is it possible to combine the capabilities of an archetype and a normal Maven plugin into a single plugin?
I have a custom language which I can compile into Java source code. I've written a Maven plugin which does this in the generate-sources phase, adds the Java source to the project, and builds the project. It works as I'd expect.
However, to use it, I need to first write out a pom.xml file referencing my plugin and describing where the input files live. I'd like to be able to go straight from raw input files to compiled code in a single maven command.
For example, suppose I have this directory structure:
my-project/
some-input-file.dsl
I want to run
bash$ mvn com.waisbrot.plugin:generate -DgroupID=com.waisbrot package
and after Maven's done running have:
my-project/
some-input-file.dsl
pom.xml
target/
generated-sources/
plugin/
SomeInputFile.java
classes/
com/
waisbrot/
SomeInputFile.class
some-input-file-1.0.jar
Actually, the integration testing of the archetype allows you to declare the parameter and goals. So do this:
Pick the template project you want to create
mvn archetype:create-from-project. It will create a new archetype
Review src/test/resources/projects, especially goal.txt and archetype.properties (source: http://maven.apache.org/archetype/maven-archetype-plugin/integration-test-mojo.html). Tweak so install will be implicity
mvn verify will be able to build the archetype, run the it, and get it installed
Hope it helps
I have a maven project which is configured (via the use of pom.xml and assembly.xml) to package a zip file containing both the compiled webapp (war file) and all files under src/main/folder alongside it whenever we run mvn clean package assembly:single.
This project imports/uses another maven project (which becomes a jar file) and that project in turn also imports/uses a third maven project (again a jar file).
The third project also contains some files inside src/main/folder as well which I'd like to be placed alongside the other files in the zip file whenever I build the main project (the one on top of the chain that becomes a war file).
Is it possible somehow to tell maven to include all files in a specific folder inside all it's dependencies (Or in one specific dependency) alongside in the zip file?
Start here: Maven: The Complete Reference - 8.5. Controlling the Contents of an Assembly
Note that if you deploy a Maven project with assembly:assembly (which you really should configure as a <build> plugin, not use on the command line), the assemblies get "attached" to the project and installed in the repository. You can then reach them using the Maven dependency notation, i.e. mygroup:myartifact:extrafiles:zip
I've found the Assembly descriptor <dependencySets> cumbersome to configure. They really are for the simple case (including the JAR files your application needs at runtime).
Here is the general approach I would take for your desired outcome:
Use Maven Dependency Plugin dependency:copy to download the specific files from the other projects, placing them under a sub-directory of target/
Configure your assembly descriptor to add those downloaded/extracted files to your final assembly artifact.
Alternatively, hack something together using Maven Ant Run Plugin.
You will need to produce an additional assembly from the third project to package up the extra files. Append the assembly id so it produces a package named something like third-1.0.0-extrafiles.zip
Then add this as a dependency of your first project using <type>extrafiles</type> in the dependency descriptor. In the assembly for the first project you'll have to tell it to "unpack" the dependencies of this type (so you don't get a zip in a zip)
I'm building a maven archetype project. As parameter (serviceDescriptor), I'm passing path to an xml file. When the generate goal is successfully executed, I would like to have the serviceDescriptor file in src/main/resources. Based on maven archetype documentation, it seems that is not possible but, there should be a way to do it.
I have spent couple of days on this and I think that I have found a reasonable solution.
As I mention in the question, I'm passing the file path as required property to the archetype:generate.
I had to implement a simple plug-in that is executed after archetype generate is finishing. This plug-in is coping the file into src/main/resources, read some data from the file and update the pom.xml setting some properties. In order to be able to modify the pom.xml file I'm using maven-model-2.0 archetype as dependency in maven plug-in. It offers Maven MvenXpp3Reader and MavenXpp3Writer classes that allows to safe modify pom.xml.
In order to tell to archetype project to execute plug-in at the end of generate phase of archetype:
mvn archetype:generate -goals=plugin_groupId:plugin_artifactId:goal
The downside is that the plug-in should be available in a accessible repository or local repo.
how do i get maven to run a specific method of mine before it creates the jar file?
basically, i have java code in my junits folder (not a test, just a class with a
main([path to save to])
) that generates an xml file that must be included in the jar. how do i get maven to follow this flow?
compile
run custom method to create xml file passing it the path of the build folder (this method needs the full classpath of the project to run)
jar classes
Bind the maven exec plugin to the generate-resources phase. And your are done.
In short, make it a plugin/MOJO.
In long, philosophy of Maven is not having you to write the build logic inside. It is a more declarative approach.
Anyway, you still have a last resort: use maven-antrun plugin to write a short logic to call whatever u need as ant target.