There's a Maven project I want to use as a dependency for one of my projects. I downloaded the project and ran "mvn install", which installed it to my /.m2/repository/ folder. I added the dependency in my POM file. When working in my IDE (IntelliJ IDEA), I can use the dependencies correctly and run my program. Whenever I do a mvn package or mvn install from the command line (for my program), however, I get:
Failed to execute goal on project MyProject: Could not resolve
dependencies for project...
And then it lists each dependency that I specified in my POM.
If I run mvn with -X, I see that it's pointing to the right settings.xml file and .m2 folder for my local repository. Does anyone know why it sees the artifacts correctly when I work in my IDE, but not from the command line?
Related
trying to get onboard at new job. Guide says to add Maven Dependencies into the Deployment Assembly of the project. There should be an option to add java build paths when I press add but no such option appears. Because of this there no maven and i cant launch the local tomcat server. Is there another way to add the Maven Dependencies build path?
https://imgur.com/a/fbGnead
if I understand right you have a maven project?
If is that you must have pom.xml file in your root path project.
If you want to run your maven project:
mvn clean package
mvn install
mvn tomcat:run
If you want to import your maven project in Eclipse
mvn eclipse:eclipse
If doesn't work try with this solution from mkyong
https://www.mkyong.com/maven/no-more-mvn-eclipseeclipse-whats-next/
regards.
I have a maven project in Eclipse and I added some local jar files to the buildpath. If I do not add any dependency to the pom.xml file I am able to execute maven install. Then, if I add those dependencies to the pom the command maven install continues working as well. Now in this situation if I run maven clean then maven install fails. Why?
I also tried to run Maven -> Update Project but the result is the same. What is the problem?
If you are using non maven dependencies then it will fail to build eg from CLI and in your case in Elipse after cleaning the project as well. In order to make it work you have to installl tha JAR you are using as Maven artifact and the ninclude it in POM dependencies like every other library.
Here you have info on how to install 3rd party JARs to local repo
https://maven.apache.org/guides/mini/guide-3rd-party-jars-local.html
I got the same problem and resolved by adding the 3rd party in the pom.xml manually
I have added dependencies in pom.xml and immediately the corresponding jars started to show up in maven dependencies section of dynamic web project.
I just want to know that I have not done mvn install in cmd so how did they get saved in maven repository.
Another query I have, is that since jars are availble in maven dependencies folder of dynamic wep project, so my project runs successfully or not as depndencies are already satisfied without doing mvn install.
When you list a <dependency> in your project's POM, M2Eclipse (Eclipse's plugin in this case) will trigger Maven to resolve that declared dependency...meaning Maven will check your local repo first for that dependency, and if it's not found there it will pull it down from the next highest repo you have configured (possibly an agency-level repo, or Maven's default public repo on the web).
No mvn install is required, as the purpose of that would be to install your current project's packaged artifact into your local repo, rather than install any dependency.
Hope this helps to clarify why an install is not used to copy dependencies into your local repo.
I'm working in eclipse on a java / javascript project, we're using maven to manage our project dependencies, I ran into a issue with maven build (clean install) does not install the dependencies that I specified in the POM.xml file, I tried everything I can find on the internet the whole day today, still no luck, I'll be really appreciate if anyone could kindly take a look at, thank you :)
I got a reuse lib project (lib) and a working project (project), the project should be installing the lib during the maven build, So, here's more detail information on what exactly I did:
I ran maven clean on the lib, then ran maven package, the lib-1.0.0-SNAPSHOT.jar file was generated successfully.
then in the working project POM.xml file, I added the dependency declaration.
I right clicked the working project, maven -> update maven project, where I checked the 'force update of snapshots / releases' checkbox, then -> ok
I right clicked the working project, run as -> maven build (with clean install, and also I checked on the 'Update Snapshots' checkbox) -> apply -> run
In the console, I saw the reuse lib was downloading and then downloaded, but it's never got installed (there should be a line says installing reuse lib...), as the result of it, the reuse lib will not be loaded after I ran my working project, it drives me insane -_-!..
Only your maven projects build output can be installed (in the local repository with mvn install, resp. mvn clean install). During the build it will resolve the dependencies (and the transitive dependencies) to be downloaded and packed to your delivery. Those dependencies of your project will implicitly also be "installed" in your local repository since you will see them in your local repository after the download happened - Maven will however not see that as a install in the meaning of install of the default lifecycle.
To install your "reuse lib"-Maven project you will have to run mvn install or mvn clean install on that project's pom rather than on a project which "just uses it as dependency".
I want to add jpoller.jar as a maven dependency, so I edited my pom.xml file to include it:
<dependency>
<groupId>org.sadun</groupId>
<artifactId>jpoller</artifactId>
<version>1.5.2</version>
</dependency>
Now, as expected, when I compile from the command line I get an error because jpoller isn't in any of the repositories I have listed in my pom, nor could I find one for it. Although I could create a repository for it, I'd rather not at this point. Thus, I get the following error:
[INFO] Failed to resolve artifact.
Missing:
---------- 1) org.sadun:jpoller:jar:1.5.2
Try downloading the file manually
from the project website.
Then, install it using the command:
mvn install:install-file -DgroupId=org.sadun -DartifactId=jpoller -Dversion=1.5.2 -Dpackaging=jar -Dfile=/path/to/file
How can I do this from the M2Eclipse plugin on machines where the maven CLI isn't available?
How can I do this from the M2Eclipse plugin on machines where the maven CLI isn't available?
Well, simply do it from Eclipse. First, get that jpoller jar and save it somewhere on your file system. Then, in Eclipse, from the top bar, Run > Run Configurations... then right-click on Maven Build and configure the New_configuration freshly created:
Select an arbitrary Base directory
Fill the Goals with install:install-file
Add parameters for each required parameters, without the -D prefix (e.g. file as Parameter name and /path/to/file as Value and so on for groupId, artifactId,packaging and version).
And run this configuration. Or... just install Maven.
The install command automates the creation of a folder structure in ~/.m2 and pom.xml file for the dependency artifact. This can be done manually. OR You can simply copy the ~/.m2/{group}/{artifact} folder from a machine that does have mvn installed.
Edit: This tool will help you find public repositories for a given dependency.
Edit2: See http://maven.apache.org/guides/mini/guide-coping-with-sun-jars.html for an explination of the process of installing dependencies manually. Note that most sun jars are now available in the java.net repository http://download.java.net/maven/2/