[tycho-user] Working with 3rd party dependencies

[Filip Krikava <krikava@xxxxxxxxx>]

Hi,

I'm wondering what is the proper way to work with 3rd party 
dependencies. I know there has been already quite a bit of a discussion, 
but I still have not found any easy to use solution.

My requirements are:

1. easy for a developer to add a new dependency (should be comparable 
with the effort one has to do when adding a regular dependency in maven)
2. support source features
3. be usable both in tycho build and in eclipse (without M2E)

I started with [1] and here is my current workflow using tycho only:

1. get the library using maven dependency plugin
2. in eclipse create a new plugin project using existing JAR
3. update MANIFEST.MF, build.properties and pom.xml so it corresponds 
well to the artifact (example is below)
  - tweak transitive dependencies
  - tweak the MANIFEST in cases the artifact is not a proper OSGi bundle
  - sync names and versions
4. update parent project's pom.xml (example is below)
5. update feature.xml
6. build

I ended up using twice the maven dependency plugin to unpack both the 
artifact's classes and sources.

While it works it seems to be overly complicated for something which 
could be very easy. Of cause it can be scripted, but I guess there is an 
easier way to do this?

I found the p2-maven-plugin, but that one does not support source 
bundles neither it can manipulate MANIFEST.MF in cases an artifact is 
not a proper OSGi bundle.

Thanks a lot for any suggestions!
Filip

--

[1] 
http://software.2206966.n2.nabble.com/How-to-manage-dependencies-in-a-manifest-first-build-td5355462.html


org.apache.commons.lang3/pom.xml:
--
<?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="http://maven.apache.org/POM/4.0.0"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
	<modelVersion>4.0.0</modelVersion>

	<parent>
		<groupId>repo</groupId>
		<artifactId>parent</artifactId>
		<version>1.0.0-SNAPSHOT</version>
		<relativePath>../parent</relativePath>
	</parent>

	<artifactId>org.apache.commons.lang3</artifactId>
	<version>3.1.0</version>
	<packaging>eclipse-plugin</packaging>

	<dependencies>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>3.1</version>
		</dependency>
	</dependencies>

</project>

parent/pom.xml
--
<?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="http://maven.apache.org/POM/4.0.0"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
  <modelVersion>4.0.0</modelVersion>

  <groupId>repo</groupId>
  <artifactId>parent</artifactId>
  <version>1.0.0-SNAPSHOT</version>
  <packaging>pom</packaging>

  <properties>
    <tycho.version>0.15.0</tycho.version>
  </properties>

  <modules>
    <module>feature</module>
    <module>site</module>

    <!-- 3rd party modules -->
    <module>../org.apache.commons.lang3</module>
  </modules>

  <build>
    <plugins>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>build-helper-maven-plugin</artifactId>
        <version>1.5</version>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-dependency-plugin</artifactId>
        <version>2.5</version>
        <executions>
          <execution>
            <id>copy-dependencies</id>
            <phase>initialize</phase>
            <goals>
              <goal>unpack-dependencies</goal>
            </goals>
            <configuration>
              <outputDirectory>${project.build.outputDirectory} 
</outputDirectory>
            </configuration>
          </execution>
          <execution>
            <id>copy-dependencie-sources</id>
            <phase>initialize</phase>
            <goals>
              <goal>unpack-dependencies</goal>
            </goals>
            <configuration>

<outputDirectory>${project.build.directory}/src</outputDirectory>
              <classifier>sources</classifier>

<failOnMissingClassifierArtifact>false</failOnMissingClassifierArtifact>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>org.eclipse.tycho</groupId>
        <artifactId>tycho-p2-repository-plugin</artifactId>
        <version>${tycho.version}</version>
      </plugin>
      <plugin>
        <groupId>org.eclipse.tycho</groupId>
        <artifactId>tycho-maven-plugin</artifactId>
        <version>${tycho.version}</version>
        <extensions>true</extensions>
      </plugin>
      <plugin>
				<groupId>org.eclipse.tycho</groupId>
				<artifactId>tycho-compiler-plugin</artifactId>
				<version>${tycho.version}</version>
				<configuration>
					<excludes>
						<exclude>**/*.*</exclude>
					</excludes>
				</configuration>
			</plugin>
      <plugin>
        <groupId>org.eclipse.tycho</groupId>
        <artifactId>tycho-source-plugin</artifactId>
        <version>${tycho.version}</version>
        <executions>
          <execution>
            <id>plugin-source</id>
            <goals>
              <goal>plugin-source</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>