I start learning packaging for several distros (currently Cygwin and Debian).
They have requirement to build system to allow out-of-tree build (synonym out-of-source build):
http://wiki.debian.org/UpstreamGuide#Out-of-Tree_Builds
To work-around "dumb" build system for example cygport recommend use lndir (from xutils project):
lndir ${S} ${B}
cd {B}
...build-commands...
I read mvn(1) man page but doesn't found anything appropriated. Next I just try:
$ mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
...
$ pwd
/maven/simple
$ ls
my-app
$ mvn -f my-app/pom.xml compile
...
[INFO] --- maven-compiler-plugin:2.0.2:compile (default-compile) # my-app ---
[INFO] Compiling 1 source file to /maven/simple/my-app/target/classes
As you can see target directory created in source root hierarchy while I look for a way to avoid this.
Is it possible out-of-tree build with maven? And how?
You could do like this to get it in your current working directory:
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.stackoverflow</groupId>
<artifactId>Q13173063</artifactId>
<version>1.0-SNAPSHOT</version>
<name>${project.artifactId}-${project.version}</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<buildDir>${user.dir}</buildDir>
</properties>
<build>
<directory>${buildDir}</directory>
</build>
</project>
Then you can issue
mvn -f my-app/pom.xml compile
And it will give you your classes in the current working directory.
And easily change to another output directory:
mvn -f my-app/pom.xml -DbuildDir=/tmp/build compile
It might be as simple as having a
<build>
<directory>/your/build/directory</directory>
</build>
in your pom.xml. /your/build/directory need not be in the source tree and can be parameterized using the usual ${...} syntax.
Cheers,
Related
I built a server template in java and now i need to compile and run it using MAVEN.
this is my POM:
<?xml version="1.0" encoding="UTF-8"?>
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0">
<modelVersion>4.0.0</modelVersion>
<groupId>bgu.spl</groupId>
<artifactId>spl-net</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
-<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<name>spl-net</name>
</project
When I run mvn compile it all works. but then i go to test it with: mvn exec:java - Dexec.mainClass=”bgu.spl.net.impl.BGRSServer.ReactorMain” - Dexec.args=”<port> <No of threads>” and it gives me a class not found exception. I looked in the target directory and this exact main was indeed there, it just refuses to run.
Turns out there was nothing wrong with my code. I failed to realize that in ubuntu, the command: mvn exec:java - Dexec.mainClass=”bgu.spl.net.impl.BGRSServer.ReactorMain” - Dexec.args=”<port> <No of threads>” simply doesn't work. the correct command would be: mvn exec:java - Dexec.mainClass=bgu.spl.net.impl.BGRSServer.ReactorMain - Dexec.args=<port> <No of threads>
I want to print out a String that contains Cyrillic letters (for the sake of example). The problem is that on my output the string will show '?' characters instead. This problem only occurs if I try to print on stdout in a (fresh or not) Neatbeans Maven project.
Below you can see that Maven puts the "-Dfile.encoding=UTF-8" parameter in, so I dont understand why is my encoding not UTF-8. When I create a fresh Neatbeans project (without Maven) the encoding shows UTF-8 and the output is fine.
package com.trashmaven;
import java.nio.charset.Charset;
public class TrashMaven {
public static void main(String[] args) {
System.out.println("file.encoding=" + System.getProperty("file.encoding"));
System.out.println("defaultCharset: " + Charset.defaultCharset());
String myString = "мусор";
System.out.println("Russian letters: " + myString);
}
}
My pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com</groupId>
<artifactId>TrashMaven</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>10</maven.compiler.source>
<maven.compiler.target>10</maven.compiler.target>
</properties>
</project>
The output is the following:
cd C:\Asztal\0Java Projekts\Testing stuff\TrashMaven; "JAVA_HOME=C:\\Program Files\\Java\\jdk-10.0.2" "M2_HOME=C:\\Program Files (x86)\\Maven\\apache-maven-3.6.0" cmd /c "\"\"C:\\Program Files (x86)\\Maven\\apache-maven-3.6.0\\bin\\mvn.cmd\" -Dexec.args=\"-classpath %classpath com.trashmaven.TrashMaven\" -Dexec.executable=\"C:\\Program Files\\Java\\jdk-10.0.2\\bin\\java.exe\" -Dmaven.ext.class.path=\"C:\\Asztal\\0Java Projekts\\00netbeans\\netbeans\\java\\maven-nblib\\netbeans-eventspy.jar\" -Dfile.encoding=UTF-8 org.codehaus.mojo:exec-maven-plugin:1.5.0:exec\""
Running NetBeans Compile On Save execution. Phase execution is skipped and output directories of dependency projects (with Compile on Save turned on) will be used instead of their jar artifacts.
Scanning for projects...
---------------------------< com:TrashMaven >---------------------------
Building TrashMaven 1.0-SNAPSHOT
--------------------------------[ jar ]---------------------------------
--- exec-maven-plugin:1.5.0:exec (default-cli) # TrashMaven ---
file.encoding=Cp1252
defaultCharset: windows-1252
Russian letters: ?????
------------------------------------------------------------------------
BUILD SUCCESS
Set the environment variable JAVA_TOOL_OPTIONS=-Dfile.encoding=UTF8, restart Netbeans and try again. Check the value "defaultCharset" that you're logging (It should be UTF-8 then).
I have source code for a framework, let's call it my-framework. It provides various packages, including com.not_telling.framework.db.
I have a pom.xml file for this framework:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.not_telling</groupId>
<artifactId>my-famework</artifactId>
<packaging>jar</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>my-framework Maven Library</name>
<url>http://maven.apache.org</url>
<!-- more things here... -->
</project>
I can compile this and install it to my local repository cache, using this command:
mvn install
End of the install log:
[INFO] Installing C:\Users\MyUserName\my-framework\backend\target\my-framework.jar to C:\Users\MyUserName\.m2\repository\com\not_telling\my-famework\0.0.1-SNAPSHOT\my-famework-0.0.1-SNAPSHOT.jar
[INFO] Installing C:\Users\MyUserName\my-framework\backend\pom.xml to C:\Users\MyUserName\.m2\repository\com\not_telling\my-famework\0.0.1-SNAPSHOT\my-famework-0.0.1-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
Then I have another project, that tries to use this as a dependency:
<dependency>
<groupId>com.not_telling</groupId>
<artifactId>my-famework</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
The compilation phase of this project fails with this message:
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project my-project: Compilation failure: Compilation failure:
[ERROR] /C:/Users/MyUserName/workspace/my-project/backend/src/main/java/com/not_telling/some_example.java:[13,17] package com.not_telling.framework.db does not exist
Why is that? Maybe because the jar is in the repository cache, but not in a local repository?
This question is a follow up of absolute maven pomderived entry added to classpath - I realized that instead of doing magic with relative source directory references, I need to make a separate module, but I'm facing this problem.
It was bleeding from numerous wounds. These needed to be fixed:
move source files from under src/ to under src/main/java, in both the framework and the application project
change the group and the artifact id to match the package name E.g. for a package that is named "com.not_telling.framework" I had to use groupId=com.not_telling and name=framework.
The dependency scope was wrong in the application's pom file. I had to remove test
Now it works from command line I can do "mvn install" for the framework, and then "mvn package" for the applications.
The only problem left is that the application cannot be compiled from eclipse, I had to remove all linked source folders / build paths in the application project to the framework.
I am looking to start a project using Vaadin and I want to use Maven as the repository manager, but I am having a lot of trouble starting the Maven project.
I tried creating a project in IntelliJ using the vaadin-archetype-application-example and it doesn't create any directory.
I also tried creating the project with the mvn commands and I found a lot of troubles too. When I create the Maven project this error is shown in the log:
-Dmaven.multiModuleProjectDirectory system propery is not set. Check $M2_HOME environment variable and mvn script match.
[ERROR] Maven execution terminated abnormally (exit code 1)
How can I deploy a Maven project with IntelliJ? I have the Maven plugin installed and the mvn command seems to work just fine.
This is my pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.imtoolazytoadmin</groupId>
<artifactId>ImTooLazyToAdmin-master</artifactId>
<version>1.0-SNAPSHOT</version>
</project>
Use this command to create your project and then import it to your IDE.
$ mvn archetype:generate \
-DarchetypeGroupId=com.vaadin \
-DarchetypeArtifactId=vaadin-archetype-application \
-DarchetypeVersion=7.5.9 \
-DgroupId=your.company \
-DartifactId=project-name \
-Dversion=1.0 \
-Dpackaging=war
More info about creating Vaadin projects in IntelliJ here.
I am using testng-6.8.21.jar for writing test case from the following link:
http://www.tutorialspoint.com/testng/testng_tutorial.pdf
I am able to compile the java file TestNGSimpleTest.java
but when I try to use this command:
java -cp "C:\TestNG_WORKSPACE" org.testng.TestNG testng.xml
it says:
could not find or load main class org.tesng.TestNG
You must provide full path to the jars in the classpath. For example :
java -cp '/path/to/testng-6.8.8.jar' org.testng.TestNG testng.xml
But testng requires other dependencies that you also must include in the classpath :
\- org.testng:testng:jar:6.1.1:test
+- junit:junit:jar:3.8.1:test
+- org.beanshell:bsh:jar:2.0b4:test
+- com.beust:jcommander:jar:1.12:test
\- org.yaml:snakeyaml:jar:1.6:test
The easiest way is to use a dependency manager. For example, Maven.
Briefly, you need (not required but it makes everything easier) to have a standard project structure :
main-directory
pom.xml <- File required by maven. It always has this name.
-src
-main
-java <- Place your Java classes here
-resources <- Place your images, conf files here etc.
-test
-java <- Place your java test classes here
-resources <- Place your test resources here.
Then, with this simple pom.xml, Maven understand that you want testng and downloads testNG's dependencies :
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany</groupId>
<artifactId>my-app-name</artifactId>
<version>1.0.0-SNAPSHOT</version>
<!-- Declare your dependencies here-->
<dependencies>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.1.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
Then launch :
mvn test
And if you want to have a view on the dependencies, use :
mvn dependency:tree
(This is how I got the preceding dependency tree)