I have private Maven repository (Nexus2) that requires a fixed username and password even for reading it.
I am now trying to find an easy way to make this repository accessible by all developers. My first attempt was to define the repository in the parent project's pom.xml (which is only accessible for developers from the SCM) - which does not work as there is no way to specify username and password.
Therefore I have to edit the user specific settings.xml.
Is there a Maven plugin available that allows me to add specific entries to the settings.xml upon execution?
Related
I'm working on some generic template which I need to use Jfrog artifactory for the repository. I have gone through their documents they are specified to use setting.xml (need to add report info) for maven, but I don't want to force down the users to change there settings.xml who are going to use my template.
So i want it should be in my parent pom to access this and use further.
While you can define repositories in (parent) POMs, the settings.xml often overrides these settings.
If the settings.xml has a <mirror>*</mirror> entry, everything from the (parent) POM will be useless.
So the standard way to go is to change the settings.xml.
When I try to build neo4j from sources and deploy it, the deployment phase fails since there is already a repository defined in the grandparent's pom.xml.
Is it possible to redefine (or add) the DistributionManagement properties so that I'll be able to deploy custom neo4j build to an internal non-local repository?
It is possible since maven-deploy-plugin 2.8
Just be sure to use that version of the plugin (by defining it in neo4j's pom if neo4j doesn't already do that by itself)
Then define altReleaseDeploymentRepositoryand/or altSnapshotDeploymentRepository in your maven settings.xml. (Depending on your personal preference you can also define that inside a profile).
The syntax of the alternative repositories is id::layout::url where id must match the id of a server that is also defined in your settings (giving you the chance to give user/pass for that server). Layout is default
Example:
<altReleaseDeploymentRepository>my.nexus::default::https://my.domain.com/nexus/content/repositories/releases/</altReleaseDeploymentRepository>
I see several options:
directly in pom.xml
in company super-pom
in settings.xml (global or user)
in a profile or directly (in settings.xml or pom.xml)
We want our Jenkins to push artifacts to internal repository, and developers to pull missing artifacts from there.
If I put the repository URL in pom.xml, and later the internal repository is moved to a different address, the released versions will all have a broken link.
Super-pom saves some repetition, but in a clean setup you need to somehow know where the repository is to find the parent POM — to tell you where the repository is.
Having the URL in settings allows one to change it without modifying the artifacts, but there are two problems:
build will fail due to unresolved dependencies, if maven settings have no reference to the internal repo
developers have to update their settings.xml files manually
I'm also unsure about the merits of putting repository configuration in profiles. I know it let's you easily switch the repositories on and off, but shouldn't the -o option and snapshot resolution settings be enough for most uses?
What about using a different repository (e.g. with instrumented classes) for integration tests?
Configure a single repository in the users ${HOME}/.m2/settings.xml and configure other needed repositories in your appropriate repository manager either Nexus, Artifactory or Archiva. In Jenkins there is the Config File Provider plugin which exactly handles such situations in a very convinient way.
If you want to have repeatable builds and good control over your organization internally, use a repository manager and use a mirrorOf entry in everyone’s settings.xml to point at that url.
If you are exposing your source and want to make it easy for others to
build, then consider adding a repository entry to your POM, but don’t
pick a URL lightly, think long-term, and use a URL that will always be
under your control.
http://blog.sonatype.com/2009/02/why-putting-repositories-in-your-poms-is-a-bad-idea/
According to the Maven documentation:
You can force Maven to use a single repository by having it mirror all repository requests. The repository must contain all of the desired artifacts, or be able to proxy the requests to other repositories. This setting is most useful when using an internal company repository with the Maven Repository Manager to proxy external requests.
To achieve this, set mirrorOf to *.
This StackOverflow question also suggests that setting mirrorOf is sufficient to block an external repository, so why does the Sonatype documentation suggest overloading central with an unreachable URL?
The bogus URL is really irrelevant - you can set it to the original one if you need to, or the URL of your repository manager - as long as the mirrorOf is applicable, it won't be used.
The reason these examples redefine central is to set policies on artifact requests to the default repositories. By default, Maven does not enable snapshot requests to central, and uses default update and checksum policies. Redeclaring central allows these to be overridden - in this case, to enable snapshot artifacts and plugins, and the mirror then redirects all of these to the repository manager. This avoids the need to declare the repositories in your POM (as long as all users have their settings correct).
I wrote that so I can tell you what I was thinking ;-)
The central repository definition needs to be updated to enable snapshot retrieval for at least one repo, otherwise Maven won't even ask the repository manager (pointed to by the mirrorOf) for any snapshots.
While not required, I like to change the definition of the url to be an invalid one also so if there is a misconfiguration somewhere else in the system, it becomes immediately obvious what is happening. Otherwise Maven may still reach out to Central and mask the problems. It's essentially a fail-fast setup.
There's more information on this topic in an old blog I wrote
maven needs project dependencies to be available locally for it to run. It does not care about how it is made available - whether manually installed (using mvn install:install-file), through a mirror or by from central repository. It will fail to run if it is unable to find dependencies.
The sonatype documentation that you are referring to is on using nexus to mirror/proxy repositories. The url specified should be a valid nexus url and cannot be unreachable.
The same is suggested in the SO question as well.
we have a settings.xml on a build server that restricts access to outside repositories and forces access to a local repository.
with the cooperation of the policy makers behind this, we are investigating the possibility to selectively (from a project's pom.xml) enable outside repository access.
is this possible? if so, would it be as simple as configuring the repository in the pom.xml?
I'm afraid it isn't possible. You need to specify an alternative settings.xml on the command line.