i have following requirement.
i need to download the latest version of artifact from custom nexus repository rather than snapshot repository.
please suggest
Thanks.
To get the latest version of any artifact, just omit the <version> tag from the dependency. This way maven will always fetch the latest version of this artifact from the remote repo.
Warning: Keep in mind that this is not the preferred way to handle dependencies nor it is the proper flow of dependency management. By keeping the version number open ended, there is a very high probability that your project may fetch a particular version of any library that is now not backward compatible and may break your functionality in the project. It is, therefore, always recommended to specify a particular version number of all artifacts that are required for any application and when updating any library version, one should properly test it.
EDIT
For maven3 you can use the facility of an open ended version tag. Something like this
<version>[1.12.4,)</version>
Take a look into this page for further details about version ranges
According to this issue: https://issues.apache.org/jira/browse/MNG-3092 snapshots cannot be excluded (at least until this is fixed).
Related
We are using release plugin to convert snapshots to releases, but snapshots were already added as dependencies in other projects. Do we need to update every project pom, to use the new releases.
Eg: ArtifactA is included in ArtifactB,
ArtifactA is included in ArtifactC
ArtifactB and ArtifactC is included in Artifact D
Is there an alternate way to push dependent releases in place of snapshots
[We use Jenkins to build and push to Nexus]
Our build server runs versions:use-releases followed by a commit to the SVN before the build. This replaces all SNAPSHOT versions by their respective release versions if they exist.
A less cumbersome way of dealing with releases - keep using snapshots. Technically there's nothing wrong with snapshots and there's no need to change them to release versions. Just don't use versions with SNAPSHOT suffix - use resolved snapshots (with timestamp and build number).
As for the dependencies - usually there's no big need to change the version immediately after the release. It's only when clients need the updates - then they should change to newer versions manually.
If we're talking about remote API and its client lib as a dependency - such remote API needs to keep backward compatibility to give some time for others to upgrade.
I'm currently setting up revapi-maven-plugin for a project, using latest version (0.7.0), and we want to check on our jenkins that no regression appears in our API during development.
Then for my process I don't want to check the regression between a snapshot and a release but between two snapshots.
Unfortunately (?) we use a different repository for our snapshots and our releases, and apparently revapi-maven-plugin seems not able to get the latest snapshot version from the snapshot repo.
Or is it and I did not understand how to do that?
I already put those value in my configuration but it does not change anything:
<alwaysCheckForReleaseVersion>false</alwaysCheckForReleaseVersion>
<oldVersion>LATEST</oldVersion>
This is supported since the version 0.8.0 of the revapi-maven-plugin.
The documentation of the oldVersion property reads (https://revapi.org/modules/revapi-maven-plugin/check-mojo.html#oldVersion):
If you don't want to compare a different artifact than the one being built, specifying just the old version is simpler way of specifying the old artifact. The default value is "RELEASE" meaning that the old version is the last released version of the artifact being built (either remote or found locally (to account for artifacts installed into the local repo that are not available in some public remote repository)). The version of the compared artifact will be strictly older than the version of the new artifact. If you specify "LATEST", the old version will be resolved to the newest version available remotely, including snapshots (if found in one of the repositories active in the build). The version of the compared artifact will be either older or equal to the version of the new artifact in this case to account for comparing a locally built snapshot against the latest published snapshot.
In development, I can reference the latest version of an artifact as 1.2.3-SNAPSHOT. Now I need the same behaviour for release candidates, i.e. I would like to be able to depend on the latest release candidate (there should also be a procedure for the developer to declare development versions as release candidates).
I am not sure how to implement this behaviour properly. Should I use an additional repository for release candidates and move development versions to this repository if the developer requests it? Or can I somehow define a "second snapshot list", like 1.2.3-RC?
You can get there be re-configure a few things:
use a version range for the dependency
change the updatePolicy for the repository you store the release candidates. see https://maven.apache.org/settings.html (updatePolicy). If you store the artifacts in a maven proxy usually you need to allow to overwrite releases.
Remember in a multi module build that they might upload modules before detecting a failed build (due to mvn deploy being a phase not a goal). You need to verify the complete build is ok before starting to upload artifacts in the maven repository. Or stage them somehow.
Remember this will most certainly prevent your builds being reproducible. Since an RC dependency might change between builds. You would need to change the version range - which is not always an issue. Ranges may work for you.
I've better experience to let developers stay on snapshots but have the CI server set an explicit version (for example using the versions plugin) prior to deployment / releasing for the dependency the artifact uses.
I use maven version range for the dependencies in my parent pom.It works fine when I do a build on snapshot or a release.
But how should I need to proceed when I want to use the specific version of dependencies in a branch ?
For example: when I use version range such as (1.2.0,) it will always fetch the latest jar from the nexus repository. The latest would be like 1.2.5 as of when I do a release, since the dependencies are getting changed over and over.Now the latest version of my dependencies is 1.2.8-SNAPSHOT
In branch when I want 1.2.5 version for my dependencies, it is always looking for the latest one which is 1.2.5+
How to resolve this, while searching for similar questions I found that it could be resolved using maven-version-plugin. That requires a changes in the pom to add the plugin. But is there a solution without changing the pom and getting exact version for a dependency?
Any suggestions?
There is no solution without changing the pom at this point, if I understand the scenario correctly: In the release of a prior version of your product, the version of one (or more) of its dependencies was not fixated to the version available at the time. Now, in support of that previous release, the build has a different result than at the time of release.
There is no suggestion except to change the branch's pom to use the 'back' version available at the time of the release. Consider it a short term fix to a bug in the release process.
I need to create a maven artifact (org.foo.bar:blarb:1.0.0) that is dependent on exactly two versions of another artifact (org.blab.har:har:1.7.0 and org.blab.har:har:1.8.0, 1.7.1 and 1.8.1 are not allowed).
Others will be consuming my artifact downstream. Unless they explicitly specify, I want the default har artifact used to be 1.7.0. But, there can be something added to the pom to specify 1.8.0. (If it is not possible to specify a lower version as the default, I can live with 1.8.0 being the default, but would prefer not to.)
Can you show me a snippet that I would place in the blarb pom so that this can happen?
One possibility is to use version ranges.
You could try specifying the following in the dependency for org.blab.har:har
<version>[1.7.0],[1.8.0]</version>
This will indicate to maven to pick either 1.7.0 or 1.8.0. I guess the default would 1.8.0 (the higher version)