I have M2Eclipse plugin installed on my eclipse, and now I am reading a book that says to use the mvn command, I think that I could use eclipse IDE to follow the book, but I want to know a little more about maven. Of course, the command "mvn" is not recognized, I need to edit my PATH variable.
I googled where is maven installed, and the answer is that it is an apache tool and the path is where you want to unzip the package.
BUT, what if I don´t want to install the apache project?? Is there any other option, because how I say at the beginning, I have M2Eclipse plugin installed, so I image that the executable file must to be in some folder into the plugin eclipse path... or does it use only java jar libraries without a binary??
Thank you very much.
M2E is a plugin in Eclipse and not Maven. You are using an embedded Maven version which is part of Ecilpse. You should always install Maven to be useable via command line cause there are difference between M2E/Eclipse and command line.
You can run any mvn goal by clicking on a maven project, than right click and select Run As -> Maven Build... and type any goal you want.
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As far as I know eclipse ships with maven already installed. But in order to set up my M2_HOME in order to work with maven from the command line I need to know where eclipse stores it?
I don't want to download maven separate and have 2 instances of that on my PC. That can only create headaches.
In Eclipse there is only installed a maven-embedder which is a part of Maven which means you have to install maven for the command line separately.
Maven plugin, uses java implementation for calling maven.
What you can do is download and unzip/untar maven for mvn command-line scripts and bin, later you can configure eclipse to point to your created maven home.
Eclipse Embedded Maven is installed into:
\plugins\org.eclipse.m2e.maven.runtime_XXX
Where XXX - version and timestamp
I am already using maven outside of eclipse, but would like to use Eclipse as my main editor. I don't want to use the maven already embedded with M2E. I want to use mine located at /usr/bin/mvn.
Under Window > Preferences, I try to add a maven installation at /usr/bin/mvn (clicking Ok does nothing; stays at the same window) and at /usr/bin (gives the error: The selected directory is not a valid Maven directory..
Ask your maven where is Maven Home
$ mvn -V
Apache Maven 3.0.5 (r01de14724cdef164cd33c7c8c2fe155faf9602da; 2013-02-19 14:51:28+0100)
Maven home: /home/myuser/maven
and in Eclipse add Maven Home to Maven Installation settings.
But better solution is to use Maven distribution from http://maven.apache.org/. Simply unpack this and configure in Eclipse. Maven from system distribution work great with application installed from system and is not good for development.
/usr/bin/mvn is where the binary is placed, actual maven installation directory might be at /usr/share/maven
I have been trying to deploy a project that I created within eclipse but when I right click on the tomcat server and click "Add and Remove...", I got the message "There are no resources that can be added or removed from the server".
From what I understand it has something to do with the facets? I am not really sure to understand what is going wrong here.
Here is what I did for know:
I created a Maven project.
executed mvn eclipse:eclipse through the command line on the folder of the project
installed m2e
tried to add the project to the tomcat server
You probably want to use either mvn eclipse:eclipse OR m2e, but not both. m2e has gotten MUCH better in the last couple years, so that's what I would suggest.
Make sure you are using Eclipse for Java EE, otherwise you will need to install other plugins like WTP
Install m2e.
Install maven integration for wtp (from the eclipse marketplace)
make sure the artifact type for your project is war
Import Existing Maven Project in eclipse and browse to your pom to import the project.
It should give the correct facets to your project so it looks like a web project.
I'm using the Indigo Release of eclipse. When I check Window -> Preferences, Maven -> Installations, it confirms that it's using the Embedded (3.0.2/...) installation of Maven.
I want to be able to run maven commands from the command line (Windows Powershell), but when I type, e.g.,
PS C:\> mvn
no executable is found. I did a search for "mvn.exe" and found no results.
I suppose I could install a stand-alone version of Maven 3 and add that to my PATH, but I'd prefer to be using the same Maven installation for command line tasks as well as IDE (eclipse) tasks.
So, where is the embedded maven's mvn.exe hiding?
The simple answer is, cause it's embedded in Eclipse so you can't call it from console. If you like to do this you have to install Maven yourself.
There is no mvn.exe at all. The Maven distro comes with batch or shell scripts. Eclipse runs an embedded version which is called through an API.
remember, embedded maven is not configured to work out of eclipse environment (and terminal usage is out of STS usage).
we have to install maven.
and also note, there is no "mvn.exe"
follow the following to setup maven to work from terminal.
maven download link is here
download latest maven from here
extract it where ever you want.
i extracted as below (see the bin,boot,conf,... folders are shown below as in the image):
as this maven download is extracted from zip file (it is not setup), you will have to add this extracted path to "PATH" variable in windows environment.
follow this to set environment path:
now "mvn" command must work.
in my case, i use STS (spring tool suite)
and i had to restart STS for "mvn" to work in terminal in sts.
check it out with eclipse.
I basically have 2 questions:
Is there a way to invoke maven console from eclipse? (where I could write eclipse:eclipse, and it started building eclipse project)
Where does STS unpack it's maven? I'd like to add that path to env variables, so that I could use it from my windows console.
Is there a way to invoke maven console from eclipse? (where I could write eclipse:eclipse, and it started building eclipse project)
You could open a shell inside eclipse , cd into the right directory and run the maven console from there. But, when using M2Eclipse (see next point), you're not supposed to run eclipse:eclipse.
Where does STS unpack it's maven? I'd like to add that path to env variables, so that I could use it from my windows console.
STS bundles M2Eclipse which comes with an embedded version of Maven (so it doesn't "unpack" Maven). But you can Configure M2Eclipse to use an external version. Go to window > Preference > Maven > Installations and Add... your external install:
Try the m2eclipse plugin from sonatype and you can eliminate use of 'mvn eclipse:eclipse' altogether. After installing m2eclipse and restarting eclipse, select File->Import->Maven->Existing Maven project. Browse to your maven project and select it. The m2eclipse plugin reads the pom and creates an eclipse project (this is the step that 'mvn eclipse:eclipse' gives). There are other useful features of the m2eclipse plugin including pom editor.
m2eclipse project is moving out of sonatype into the eclipse foundation project page and will be released on the Indigo train.
See this page for more info on m2eclipse: http://m2eclipse.sonatype.org/