I am new to maven and have some basical questions.
When I see some projects, there is mvnw file included.
What I know is I dont need to install maven on my local if I use mvnw.
My question is:
what will happen when I firstly execute mvnw install?
maven with certain version is automatically installed on my local?
can I use like mvn compile instead of mvnw compile after executing mvnw install?
Thanks in advance.
what will happen when I firstly execute mvnw install? maven with certain version is automatically installed on my local?
The mvnw command will look for maven-wrapper.jar in the .mvn/wrapper directory. It will automatically download this jar file if it is not present there. We can consider this step as installing maven in the local machine just for this project. And the version of maven-wrapper.jar installed depends on the configuration in the mvnw command. On the other hand, if the maven-wrapper.jar is already present in the ./mvn/wrapper directory, the mvnw command simply uses it.
can I use like mvn compile instead of mvnw compile after executing mvnw install?
If you have maven installed in your local machine, you certainly can use mvn compile instead of mvnw compile, as long as the version of maven installed in the local machine is compatible with the project. However this can cause problems if the maven installed in the local machine is an older version and the project requires a newer version, or the the other way around.
Related
I have installed Drools in my machine and we have m2 repository in our linux machine. Does that mean maven installed in my machine.
If type mvn -v its saying command not found.
I am new to this maven. Kindly help me out
Drools is a library. It does not "install". You add it as a dependency to a Java project. If you "installed" something, it's not Drools. Perhaps it's jBPM or some other application which uses Drools.
Maven is a toolchain. When you install it, the zip file includes a binary that you need to put on your path. That binary (mvn) allows you to run from the commandline.
The two are not related in any way.
If you get an error when trying to run mvn -v that the command is not recognized, that means that the Maven binary is not on your path. Find where you installed Maven, locate the 'bin' directory in that installation, and add that bin directory to your Path environment variable.
If you did not install Maven, and therefore don't have an install directory, you probably want to go do that. Don't forget to put the bin directory on your path after installing.
(A less common way of using Maven involves packaging a mvn.cmd or mvn.sh script with your project itself so that you don't need to have Maven installed globally. If this is what you're doing instead, you need to run the mvn command from the same directory as that script.)
I am trying to update my local gradle(out of ide) from 6.5.1 to 7.0.0.
I try two commands from gradle website and network in cmd and path is the root of one of my project(there are gradlew.bat and gradlew files):
gradle wrapper --gradle-version=7.0 --distribution-type=all
gradlew wrapper --gradle-version=7.0 --distribution-type all
And, i try those commands to check the version
gradle -v
gradlew -v
The gradlew updates sucessfully. It prints version 7.0.0.
However, the version of gradle is still in v6.5.1.
How can I update it without download the v7.0.0 packet and cover the files in disk(I am worrying about that i should download all of my packages again in new gradle)?
ps: the gradle is locating in D:\gradle in my disk and java environment is openJDK 15
Thanks agains
I had the same problem and, in my case, the problem was a running gradle demon using the previous version. Check running demons with:
gradle --status
Stop the demons with
gradle --stop
Also I restarted the console/terminal.
You cannot update your gradle standalone version without downloading it, and with gradle wrapper you cannot upgrade your gradle installation, it always works on your current project folder (command gradlew) only. To upgrade a standalone gradle installation (command gradle without the wrapper prefix w), you have to manually download the binaries, include the new bin directory in your PATH environment as described in the manual on the gradle homepage, or use a package manager like sdk man, chocolatey, brew etc.
If you are using the gradle wrapper gradlew for your builds, it works completely independent from your gradle installation.
My friend and I are working on a project using Maven on Windows.
I want to run the same project on Mac. I do not know where to place the .m2 folder that I copied from Windows on Mac.
I put the .m2 into /Users/.m2. When I run the mvn clean install from the folder with a pom file I get:
Could not resolve dependencies for project ...
First copying the cache is a bad idea...apart from that the cache on Mac is under the appropriate user like /Users/USERNAME/.m2/ ...Just transfer the project (I hope you are working with a version control system like Git/SVN etc.) and just try to build it on the Mac on plain command line mvn clean package. The downloads will be done automatically.
I am creating andromda project using following command
mvn org.andromda.maven.plugins:andromdapp-maven-plugin:3.4-SNAPSHOT:generate
This generates project using the latest version of andromda and using Web. I wish to create and compile andromda Project using downloaded andromda directory jars or binaries. Is it possible??? If yes then how??
To do this download the binaries of andromda version and run mvn install through command line in the main folder of downloaded andromda project. It will start to build and will put all the jars in maven repository. Now when generating the project you have to pass the version of the andromda whose binaries you have built. It will go directly to maven repo.
I am installing and running sakai project from command prompt
mvn install sakai:deploy
but command prompt show me error that 2 artifact missing that is 2 jar files are missing dwnload it manually
i am dwnload it and save it in local system then how i can install and deploy it
When you build Sakai it will generate that missing jar file and place it into the local maven repo. That said, this version of Sakai is very old and you should be running Sakai 10. We suggest you upgrade to Sakai 10 and maven 3. If you do, this issue will go away.
The process for building Sakai is as follows:
Open a command line shell
Change directory to your Sakai source root directory (should contain many directories including the "master" directory)
Execute mvn clean install to build the Sakai source using maven
Note: The build will take an extra 5-10 minutes to download dependencies the first time
Execute mvn sakai:deploy to deploy Sakai to your tomcat using maven
Partial builds are supported by the maven2/3 build system
You can do a "mvn clean install sakai:deploy" from any subdirectory and build just that code
Once you have downloaded the jars you can run maven off-line with mvn -o clean install sakai:deploy
As i can understand you have to manually add the jar in .m2 repository where it needs to be or
add dependency in pom.xml for it(it will automatically add it in repository).
One more thing you can try, go to project>right click>build path> add external jar (it will add the jar to your project).