How to Configure Maven for Offline Development

How do I configure Maven for offline development?

You can run maven in offline mode mvn -o install. Of course any artifacts not available in your local repository will fail. Maven is not predicated on distributed repositories, but they certainly make things more seamless. Its for this reason that many shops use internal mirrors that are incrementally synced with the central repos.

In addition, the mvn dependency:go-offline can be used to ensure you have all of your dependencies installed locally before you begin to work offline.

Is it possible to run maven in offline mode?

This might be of use: how do i configure maven for offline development

If i had to guess, I'd say that maven central is being blocked by your corp firewall. You're going to want that opened up. Alternatively, your IT group can create an inhouse nexus or artifactory (read maven repo) to get these artifacts.

Even if you run it in offline, you're going to need those dependencies. So if you can't get them on your work laptop, running maven in any mode isn't going to work.

Android Studio: Configure offline build dependencies

You don't need to change anything after configuring offline build
dependencies, the error you getting is by putting comments on
build.gradle file (i think there is exception in this
documentation step 4 (optional) and that exception is [ internet is required one time for "new Android Gradle Plugin" version download if it is not present in local repo or cache ] ).

The Solution is

(If error shows like this with "correct location of our set repo in local repo", then its fine,our setting is working fine)
Uncomment the comments which we commented earlier, classpath and other things should be same ,no need to change.

Notes:- (follow this if offline build failed occurs after doing above steps)

Whichever android gradle plugin version set in CLASSPATH of build.gradle file [internet is required one time for "new Android Gradle Plugin" version download if it is not present in local repo or cache]
“offline.gradle” init scripts in “init.d” directory is executed at the start of the build.
For more details you can read from here https://developer.android.com/studio/build/dependencies
For more details about Maven vs Gradle
https://dzone.com/articles/gradle-vs-maven

Migrate maven project in offline environment

As pointed out by @Thomas, the only way to build a project which needs external dependencies with Maven is to copy the repository in the target environment. Build your project on an online environment, then copy your .m2 folder in the offline one. The build will then find all required libraries locally.
With mvn dependency:go-offline you tell maven to download all the needed plugin dependencies in your local repository.

How to perform Eclipse repository mirroring for offline installation Maven plugin?

I'm guessing that you want to install m2e (maven plugin for eclipse). You should be installing from the following update site:

http://download.eclipse.org/technology/m2e/releases

So, assuming that you want to mirror it at C:\Eclipse\repos, the command will look like this:

$eclipse_home/eclipse.exe -application org.eclipse.equinox.p2.artifact.repository.mirrorApplication \
  -source http://download.eclipse.org/technology/m2e/releases \
  -destination C:\Eclipse\repos

maven: Go online after going offline for remote development

Check dependency:go-offline goal's documentation .

In the description it states:

Goal that resolves all project dependencies, including plugins and
reports and their dependencies.

Emphasis mine.

This goal just tells Maven to resolve everything this project is dependent on (dependencies, plugins, reports) in preparation for going offline. So it just fetches locally all required stuff and nothing more.

Offline mode is enabled only when you provide the -o flag on a appropriate command ex. mvn -o install and for the scope of this command only.

In the above command, if -o is specified, maven will not check online for updates of dependencies,plugins etc and will try to retrieve them from the local repository. That's why you have to execute the aforesaid goal of maven dependency plugin before, in order everything to be available for offline mode.