I created this profile for deploying artifacts on the server via SCP. I know Ant's scp task is optional, therefore I've added the dependencies.
<profiles>
<profile>
<id>remote-deploy</id>
<build>
<plugins>
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<id>scp</id>
<phase>install</phase>
<configuration>
<tasks>
<scp .../>
<sshexec .../>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.apache.ant</groupId>
<artifactId>ant-jsch</artifactId>
<version>1.7.1</version>
</dependency>
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>0.1.42</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</profile>
</profiles>
However, when I run the profile, I end up with
An Ant BuildException has occured:
Problem: failed to create task or type
scp Cause: the class
org.apache.tools.ant.taskdefs.optional.ssh.Scp
was not found.
This looks like one of Ant's optional components. Action: Check
that the appropriate optional JAR
exists in
-ANT_HOME\lib
-the IDE Ant configuration dialogs
Do not panic, this is a common
problem. The commonest cause is a
missing JAR.
This is not a bug; it is a
configuration problem
Is it possible maven wasn't able to download those dependencies or it just ignores them?
The problem was Maven (2.2.1) didn't download the dependencies. I've found out after I upgraded Maven to version 3. For some reason,the new version downloaded the plugin dependencies and it miraculously started to work.
I have a suspicion the problem was in old version Maven's settings - pluginRepository wasn't configured.
It is likely that maven has downloaded the jars but it is not in ant's classpath. If the objective is to deploy the artifacts using maven, you should probably use Maven Deploy Plugin. What you are doing seems to be a roundabout way.
There is a maven-antrun-plugin bug entry, that could explain why this is happening in Maven-2, they also describe workarounds
In multi-module builds, if there are multiple poms configuring the maven-antrun-plugin, the first(?) seems to win, so that the ones later in the build chain reuse the antrun config from earlier poms, thus missing out on stuff that is different ...
In my problem case, I opted to use Maven-3, where the issue seems to be fixed, instead of workarounds with Maven-2. This had the additional advantage of the build to also speed up - now taking 6min instead of the 10min before.
However, if Maven-3 is not possible for you, I'd try the workarounds...
Related
I have a very simple Tycho reactor with two modules: one is a standard Maven project with this addition to make it a bundle:
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<extensions>true</extensions>
<executions>
<execution>
<id>default-bundle</id>
<phase>package</phase>
<goals>
<goal>bundle</goal>
</goals>
<configuration>
<instructions>
<Export-Package>org.acme.jar</Export-Package>
</instructions>
<manifestLocation>META-INF</manifestLocation>
</configuration>
</execution>
</executions>
</plugin>
The second is a Tycho project that has a dependency to the above JAR in the MANIFEST.MF.
If I start the build, I get the following exception:
[ERROR] Cannot resolve project dependencies:
[ERROR] Software being installed: plugin 0.0.1.qualifier
[ERROR] Missing requirement: plugin 0.0.1.qualifier requires 'bundle org.acme.jar 0.0.1' but it could not be found
Which is really weird, because the bundle is in the same reactor.
But no worries, I can just add the Maven dependency, too:
<!-- parent pom.xml -->
<plugin>
<groupId>org.eclipse.tycho</groupId>
<artifactId>target-platform-configuration</artifactId>
<version>0.26.0</version>
<configuration>
<pomDependencies>consider</pomDependencies>
</configuration>
</plugin>
<!-- plug-in pom.xml -->
<dependencies>
<dependency>
<groupId>org.acme</groupId>
<artifactId>jar</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
Still I get the same exception, which is weird because the documentation claims: Maven resolves the GAV dependencies according to the normal Maven rules.
That's just not true. Evidently org.acme.jar doesn't get resolved. Or maybe Tycho fails to see that it's a bundle.
The JAR module is an API project used for server side components, and we want to drop SWT / Tycho in the long run, so it's not an option to make org.acme.jar an Eclipse plug-in.
How do I define dependencies in the same reactor for Tycho?
I’m afraid that what you ask for is currently not possible. The Tycho Wiki documents this limitation in the dependency on pom-first artifacts HOW-TO.
That being said, if you really want your whole build (maven-bundle-plugin and Tycho parts) to run with a single mvn clean install, then using the maven-invoker-plugin at the end of the “plain Maven” build to fork a “Tycho build” should work. It’s a rather cumbersome workaround, however (example on Github).
This should be pretty simple, but I can't the around to it. I need to create an uberjar using 3rd party jars. I've already followed these instructions: Including a non-Mavenized dependency so it works with maven-shade-plugin and added them to the local repository. But now what? Every Maven tutorial/example is kinda shady (pun intended) and I just don't know how to edit the .pom file properly in order to make it work.
Besides, I'm confused about the shade "plugin" overall. I mean, I followed the basic Maven tutorials and it went all fine and dandy. But when I look into the shade plugin page, I can't find it to download, except for the source code. I mean, isn't it a plugin? Shouldn't I download the binaries and install it into Maven somehow?
Sorry about the extreme noobish question but, needless to say, I know squat about Maven.
To create your shaded (uber) jar, you just need to declare the shade plugin in your pom.xml.
With regards to installation of the shade plugin, simply declaring it in the plugins section of your pom.xml is all you need do. Maven plugins are not installed manually, but are automatically downloaded by Maven (if not already downloaded; just like dependencies), stored in your local repository, and used whenever a project needs them.
As to using it, much like other plugins, declare it in your pom.xml by adding a <plugin> element with your configuration needs. This plugin does nothing automatically (some do, some don't) - you have to specify which "goal" to execute (think "method of a class"), and in which "phase" (think "step" of the build process). Unless you have strange needs, specify the "shade" goal in the "package" phase (see below).
For more configuration possibilities, see the shade usage page, and their examples (especially selecting contents for uber jar). Here is a simple example which, when you run mvn package, replaces your original jar in the target/ directory with the uber jar. It only includes the runtime dependencies, not the ones used at test time (notice the <scope> element of the junit dependency, which is not included in the uber jar).
<project>
<groupId>com.sample</groupId>
<artifactId>test</artifactId>
<version>1.0</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.sample</groupId>
<artifactId>test-core</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
If you have already downloaded the binaries and installed them into your local Maven repository all that remains is to declare them as dependencies in the POM. If the shade plugin is also declared in the POM a simple "mvn install" should generate a standalone JAR in the target directory.
I'd like my Maven build to fail if the same artifact is referenced with different versions in my dependency tree. This would seem like a fairly trivial option, but I can't work out how to do it. Any clues?
The maven-enforcer-plugin has a dependencyConvergence rule which does what you want. Here's an example from the documentation.
This will cause a build to fail:
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-jdk14</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-nop</artifactId>
<version>1.6.0</version>
</dependency>
</dependencies>
With this being logged during compilation:
[ERROR]
Dependency convergence error for org.slf4j:slf4j-api:1.6.1 paths to dependency are:
+-org.myorg:my-project:1.0.0-SNAPSHOT
+-org.slf4j:slf4j-jdk14:1.6.1
+-org.slf4j:slf4j-api:1.6.1
and
+-org.myorg:my-project:1.0.0-SNAPSHOT
+-org.slf4j:slf4j-nop:1.6.0
+-org.slf4j:slf4j-api:1.6.0
The Maven Dependency Plugin will include a new dependency:analyze-duplicate in its version 2.2 and this is IMHO the closest thing you can get without specific development (it won't fail the build but will list duplicate dependencies).
This goal has been added for MDEP-206 (Add new Mojo to find duplicate dependency declared), which is fixed, but the version 2.2 has yet to be released so if you want to use this feature, you'll have to build a SNAPSHOT from the source tree:
https://svn.apache.org/repos/asf/maven/plugins/trunk/maven-dependency-plugin/
If you really want to fail the build in case of duplicate, either write your own mojo (extend the above one) or submit a RFE of the Maven Dependency Plugin.
As a side note, Maven 3 does Throw [a] Validation Error if pom contains a dependency with two different versions out of the box. To be totally accurate, this will be reported as warning in Maven 3.0 to not break existing Maven 2.x builds (see MNG-4005) and will be increased to error in 3.1 (see MNG-4622).
You can have the build fail on dependency analysis warnings using the dependency plugin.
See
http://maven.apache.org/plugins/maven-dependency-plugin/examples/failing-the-build-on-dependency-analysis-warnings.html
Add the following plugin:
Source: http://maven.apache.org/enforcer/enforcer-rules/dependencyConvergence.html
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
<executions>
<execution>
<configuration>
<rules>
<dependencyConvergence/>
</rules>
</configuration>
<goals>
<goal>enforce</goal>
</goals>
</execution>
</executions>
</plugin>
I have a Java EE-web-application and for using my project with oc4j application server it must be patched in my build-lifecycle to avoid several issues. Actually i do this via maven-antrun-plugin which works great. I have to remove, copy some special libraries into WEB-INF/lib and edit the web.xml, to avoid clashes with EL functions and classloading issues.
According to the maven lifecycle phases i chosed the phase prepare-package: this phase is executed before the war file is packaged, but unfortunately also before the (re-)sources are copied into the temporary working dir. I dislike working on the source folders because they're under version control and i don't want to have my coworkers to accidently commit them in cause the build-tool modified them.
So maven copies all the (re-)source stuff to target/__finalName__ where i want to fix the project for the use with oc4j. because this folder is temporary and will be packaged into the war file. Unfortunately the copying and packaging is isolated done in lifecycle package.
So how can i get between the copying of the sources and resources and the real packaging?
Example with prepare-package
This example doesn't work because the ${project.build.directory}/${build.finalName} doesn't exists and the ojdbc14.jar wasn't copied there in this phase.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.4</version>
<executions>
<execution>
<id>patch-oc4j</id>
<phase>prepare-package</phase>
<goals>
<goal>run</goal>
</goals>
<configuration>
<tasks>
<echo>Patching distribution for OC4J</echo>
<echo>Deleting the obsolete OJDBC library</echo>
<delete file="${project.build.directory}/${build.finalName}
/WEB-INF/lib/ojdbc14.jar" />
[... more patching ...]
</tasks>
</configuration>
</execution>
</executions>
</plugin>
Couldn't you use a profile for this? Maybe something like this:
<profiles>
<profile>
<id>oc4j</id>
<dependencies>
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc14</artifactId>
<version>10.2.0.4.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
</profile>
</profiles>
I have to remove, copy some special libraries into WEB-INF/lib and edit the web.xml, to avoid clashes with EL functions and classloading issues.
Sounds like you could, in part at least, do this with Build Profiles instead.. Your motivation for the problem above is a bit short, but if you elaborate we can judge this better..
I'm retrofitting bunch of existing Java projects with unified Maven build. Since each project is mature and has established Ant based build all I'm using maven-antrun-plugin to execute existing build.xml as follows:
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<phase>compile</phase>
<configuration>
<tasks>
<ant antfile="build.xml" target="compile" />
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
When I run mvn compile build fails with this message:
[INFO] An Ant BuildException has occured: The following error occurred
while executing this line:
build.xml:175: Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK.
It is currently set to "C:\Java\jdk1.6.0_13\jre"
What puzzles me is
I have JAVA_HOME=C:\Java\jdk1.6.0_13 as part of my environment setup and when mvn.bat is executed that is exactly value I'm getting, however as you see in the error message it comes up as C:\Java\jdk1.6.0_13\jre
If I run ant compile everything compiles just fine
Does it mean that perhaps maven-antrun-plugin does something like set JAVA_HOME=%JAVA_HOME%\jre? I searched my batch/build files I can't find where that change occurs
Thats the down side of external links in an accepted answer. Codehaus shut down and thus the solution is gone. For reference here's the content behind the link - you basically only need to copy the <dependencies>...</dependencies> block to your antrun plugin...
The maven-antrun-plugin runs ant with JAVA_HOME set to the jre subdirectory of the JDK, even if the JAVA_HOME for the overall run is a JDK.
There is documentation elsewhere about how to create a dependency at the project level for the JDK's tools.jar, but this does not help out antrun, which is a plugin.
The following profile does the job. The '..' in the path hauls up past the 'jre' directory to the lib directory.
<profiles>
<profile>
<id>tools.jar</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<dependencies>
<dependency>
<groupId>com.sun</groupId>
<artifactId>tools</artifactId>
<version>1.5.0</version>
<scope>system</scope>
<systemPath>${java.home}/../lib/tools.jar</systemPath>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</profile>
I was able to fix this by putting the following property definition in my ant build.xml file:
<property name="build.compiler" value="extJavac"/>