Hi Bindul,
sadly it's not that easy (or it's so easy that I don't see the
solution...). As a default and for compatibility reasons I'd like to
declare the dependencies of the Neo4j 2.x artifacts for my Maven plugin:
- org.neo4j:neoj
- org.neo4j.app:neo4j-server
- org.neo4j.app:neo4j-server:static *
For a user it would be possible to override only the first two
dependencies with the Neo4j 3.x versions: the third artifact (*) does
not exist for Neo4j 3.x (the Neo guys merged the static content into
neo4j-server.jar, i.e. into the main artifact without classifier). In
this case I would need to exclude "org.neo4j.app:neo4j-server:static"
which is still there as a 2.x artifact and pulls in some other deps that
are conflicting with the 3.x stuff. Any idea?
Cheers,
Dirk
------ Originalnachricht ------
Von: "Bindul Bhowmik" <bindulbhow...@gmail.com>
An: "Maven Developers List" <dev@maven.apache.org>; "Dirk Mahler"
<dirk.mah...@buschmais.com>
Gesendet: 12.04.2017 20:28:16
Betreff: Re: Configurable Dependencies for Maven Plugins?
Dirk,
On Wed, Apr 12, 2017 at 7:06 AM, Dirk Mahler
<dirk.mah...@buschmais.com> wrote:
Hi all,
is there a way to provide users of a plugin a way of easily switching
dependencies of it?
Background: I'm developing a Maven plugin (jQAssistant) that comes
with a
dependency to Neo4j (graph database). Currently I'm using Neo4j 2.3.x
which
has been compiled against Java 7 but I would like to offer users of
the
Maven plugin an easy option to use the newer Neo4j 3.x releases which
offer
some new features but require Java 8.
I know that it's possible to overwrite an existing dependency for a
plugin,
e.g.
<plugin>
<groupId>com.buschmais.jqassistant</groupId>
<artifactId>jqassistant-maven-plugin</artifactId>
<version>1.3.0</version>
<dependencies>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>3.1.3</version> <!-- instead of the default 2.3.10 -->
</dependency>
</dependencies>
</plugin>
As long as your code can handle the different versions of the
dependency, I think this is absolutely doable. In fact the Maven
Checkstyle Plugin uses the same approach to allow upgrading checkstyle
versions without upgrading the plugin version [1].
The problem is that in my case the old version comes with another set
of
dependencies than the new one:
I do not think this will be a problem.
old:
<dependencies>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>2.3.10</version>
</dependency>
<dependency>
<groupId>org.neo4j.app</groupId>
<artifactId>neo4j-server</artifactId>
<version>2.3.10</version>
</dependency>
<dependency>
<groupId>org.neo4j.app</groupId>
<artifactId>neo4j-server</artifactId>
<classifier>static-web</classifier>
<version>2.3.10</version>
</dependency>
</dependencies>
new:
<dependencies>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>3.1.3</version>
</dependency>
<dependency>
<groupId>org.neo4j.app</groupId>
<artifactId>neo4j-server</artifactId>
<version>3.1.3</version>
</dependency>
</dependencies>
Is there a good way to deal with it such that a user of the
jqassistant-maven-plugin can easily switch between both variants?
Cheers,
Dirk
Senior Consultant IT
buschmais GbR
- Bindul
[1]
http://maven.apache.org/plugins/maven-checkstyle-plugin/examples/upgrading-checkstyle.html
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