I downloaded maven gz file, unzipped same, but i dont know where the m2 is stored. I imagine im missing a step but i cant see what one?
Is there aninstall script etc?
[root#atddpvm5 apache-maven-3.5.4]# cd /var/tmp/apache-maven-3.5.4/
[root#atddpvm5 apache-maven-3.5.4]# ls
apache-maven DEPENDENCIES doap_Maven.rdf LICENSE maven-builder-
support maven-core maven-model maven-plugin-api
maven-resolver-provider maven-settings-builder NOTICE README.md
CONTRIBUTING.md deploySite.sh Jenkinsfile maven-artifact maven-compat
maven-embedder maven-model-builder maven-repository-metadata maven-
settings maven-slf4j-provider pom.xml src
By default the .m2 folder is stored in the home folder of the user. In this case since you are using root, the path is most likely /root/.m2. You also have to use the -a switch with ls to see that folder, since it's a hidden folder (it starts with a .). Note that the folder will only be created on the first usage of Maven, i.e. when you call a maven command on a maven project, like mvn clean install.
Additionally it looks like you have downloaded the source distribution of Maven, which only makes sense if you want to work on Maven itself. You might want to download the binary distribution, if you just want to use it.
Related
Please explain what is required to be done stepwise.
How to activate -dist and native-win?
I saw your error contains there is no pom in this directory.
Maven can run only from the location where pom file exists so make sure pom file is there in your project.
For example, your project is inside C:\Users\HP then so maven will consider HP as a project and it will try to find pom file inside HP project.
This error is coming because you didnot place hadoop source package in the C:/User/HP directory. you can download appropriate source package from http://www.apache.org/dist/hadoop/core/
unzip it and place all the files & folder in C:/User/HP then run your maven package command. It should work
We have a maven project for which we have set up jenkins for build. The reporsitory has a large tools folder which i didn't want Jenkins to download.
I just want jenkins to download src folder and pom.xml file.
I added two reporsitory locations in Jenkins - only to learn that Single file checkouts are not possible
This forced me to use shell script option provided by Jenkins for checking out pom .xml . PFB the script outline.
svn checkout $pomUrl . --depth empty
svn update pom.xml
I did not find an option in my scm plugin of Jenkins to do an empty checkout
Checkout one file from Subversion
But POLL SCM of jenkins is only polling the src folder and builds are not triggered if i make some changes to pom.xml. Is there a way to ensure Polling of my pom.xml as well?
No. Jenkins will poll what it knows.
In your scenario:
Jenkins doesn't know about your pom.xml.
Jenkins doesn't work in single file checkouts anyways.
You will have to rearrange your structure, either move the tools folder outside of the main checkout (if it's so large that it's prohibitive, why do you have it in the root location?), or move the pom.xml into the src folder.
Edit:
Here is an idea. Haven't tried so don't know if that will work.
Keep your manual checkout and update of that pom like you currently do.
Setup another SVN Add module....
Enter the root location of SVN where your pom is, give it a non-conflicting folder name
Configure Repository depth for that module as Empty (if you don't see this option, you may need to upgrade your SVN plugin and/or Jenkins).
Click Advanced... section.
Configure Included Regions with the path to your src folder, and the pom only.
Something like:
/trunk/myapp/src/.*
/trunk/myapp/pom.xml
I have imported a existent maven project (swagger for jersey jax-rs) into eclipse.
I get a bunch of errors:
It always has to do with the jackson-databind.jar
Example error:
Archive for required library: '.../.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.1.5/jackson-databind-2.1.5.jar' in project 'swagger-core_2.9.1' cannot be read or is not a valid ZIP file
I cannot find the .m2 folder? I am new to the maven stuff,
do i have to install something extra before i import a maven project into eclipse?
Thx
I cannot find the .m2 folder?
By default the .m2 directory is located at the home directory.
For *Unix operating systems, it will be something like /home/<user_who_fires_maven_commands>/.m2/...
For Windows machines , the m2 will be located at C:\Users\<user>\.m2\...
As for the exception you are getting
Archive for required library: '.../.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.1.5/jackson-databind-2.1.5.jar' in project 'swagger-core_2.9.1' cannot be read or is not a valid ZIP file
It is most probable that the archive file has gotten curropted ( maybe a download issue or might be possible that its sha1 doesn't match with the one that is on the central repo ). So you can try by simply deleting this jar file and then run mvn install and it will re-attempt to download the file again.
Another thing I would like to point out is that since this is a new eclipse installation, I would suggest that you re-index your local m2 folder so that this new eclipse knows about the files and folders inside the original m2 folder. To re-index, goto Window -> preferences --> Maven --> User settings --> there will be a text field stating the path of the .m2 ( make sure its correct ) and then press re-index
I am using Maven 3.0, and my .m2 folder location is C:\Users\me\.m2.
However, I do not have write access to that folder, but I want to change the repository location from the one defined in the settings.xml.
Due to restricted access, I am not able to edit the settings.xml to change the repository location.
How can I override the values of my settings.xml -or change the default location of the .m2 folder- without editing my C:\Users\me\.m2\conf\settings.xml file?
You need to add this line into your settings.xml (or uncomment if it's already there).
<localRepository>C:\Users\me\.m2\repo</localRepository>
Also it's possible to run your commands with mvn clean install -gs C:\Users\me\.m2\settings.xml - this parameter will force maven to use different settings.xml then the default one (which is in $HOME/.m2/settings.xml)
It's funny how other answers ignore the fact that you can't write to that file...
There are a few workarounds that come to my mind which could help use an arbitrary C:\redirected\settings.xml and use the mvn command as usual happily ever after.
mvn alias
In a Unix shell (or on Cygwin) you can create
alias mvn='mvn --global-settings "C:\redirected\settings.xml"'
so when you're calling mvn blah blah from anywhere the config is "automatically" picked up.
See How to create alias in cmd? if you want this, but don't have a Unix shell.
mvn wrapper
Configure your environment so that mvn is resolved to a wrapper script when typed in the command line:
Remove your MVN_HOME/bin or M2_HOME/bin from your PATH so mvn is not resolved any more.
Add a folder to PATH (or use an existing one)
In that folder create an mvn.bat file with contents:
call C:\your\path\to\maven\bin\mvn.bat --global-settings "C:\redirected\settings.xml" %*
Note: if you want some projects to behave differently you can just create mvn.bat in the same folder as pom.xml so when you run plain mvn it resolves to the local one.
Use where mvn at any time to check how it is resolved, the first one will be run when you type mvn.
mvn.bat hack
If you have write access to C:\your\path\to\maven\bin\mvn.bat, edit the file and add set MAVEN_CMD_LINE_ARG to the :runm2 part:
#REM Start MAVEN2
:runm2
set MAVEN_CMD_LINE_ARGS=--global-settings "C:\redirected\settings.xml" %MAVEN_CMD_LINE_ARGS%
set CLASSWORLDS_LAUNCHER=...
mvn.sh hack
For completeness, you can change the C:\your\path\to\maven\bin\mvn shell script too by changing the exec "$JAVACMD" command's
${CLASSWORLDS_LAUNCHER} "$#"
part to
${CLASSWORLDS_LAUNCHER} --global-settings "C:\redirected\settings.xml" "$#"
Suggestion/Rant
As a person in IT it's funny that you don't have access to your own home folder, for me this constitutes as incompetence from the company you're working for: this is equivalent of hiring someone to do software development, but not providing even the possibility to use anything other than notepad.exe or Microsoft Word to edit the source files. I'd suggest to contact your help desk or administrator and request write access at least to that particular file so that you can change the path of the local repository.
Disclaimer: None of these are tested for this particular use case, but I successfully used all of them previously for various other software.
Nobody suggested this, but you can use -Dmaven.repo.local command line argument to change where the repository is at. In addition, according to settings.xml documentation, you can set -Dmaven.home where it looks for the settings.xml file.
See: Settings.xml documentation
Below is the configuration in Maven software by default in MAVEN_HOME\conf\settings.xml.
<settings>
<!-- localRepository
| The path to the local repository maven will use to store artifacts.
|
| Default: ~/.m2/repository
<localRepository>/path/to/local/repo</localRepository>
-->
Add the below line under this configuration, will fulfill the requirement.
<localRepository>custom_path</localRepository>
Ex: <localRepository>D:/MYNAME/settings/.m2/repository</localRepository>
You can change the default location of .m2 directory in m2.conf file. It resides in your maven installation directory.
add modify this line in
m2.conf
set maven.home C:\Users\me\.m2
You can point to a different-settings.xml when you deploy your project. When deployed from the project folder you can have a relative path to get back to your home folder:
mvn clean deploy -s ../../.m2/different-settings.xml
AFAIK maven does not have an installer for Windows, you simply unzip it wherever you like, as explained here.
However in many places there are references to a .m2 folder under the user folder (in Win7 I would guess it to be by default at C:\Users\.m2. Alas I do not have that folder. Is there some command to create this folder? Am I missing something basic?
On a Windows machine, the .m2 folder is expected to be located under ${user.home}. On Windows 7 and Vista this resolves to <root>\Users\<username> and on XP it is <root>\Documents and Settings\<username>\.m2. So you'd normally see it under c:\Users\Jonathan\.m2.
If you want to create a folder with a . prefix on Windows, you can simply do this on the command line.
Go to Start->Run
Type cmd and press Enter
At the command prompt type md c:\Users\Jonathan\.m2 (or equivalent for your ${user.home} value).
Note that you don't actually need the .m2 location unless you want to create a distinct user settings file, which is optional (see the Settings reference for more details).
If you don't need a separate user settings file and don't really want the local repository under your user home you can simply set the location of your repository to a different folder by modifying the global settings file (located in \conf\settings.xml).
The following snippet would set the local repository to c:\Maven\repository for example:
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
http://maven.apache.org/xsd/settings-1.0.0.xsd">
<localRepository>c:\Maven\repository</localRepository>
...
When you first install maven, .m2 folder will not be present in C:\Users\ {user} path.
To generate the folder you have to run any maven command e.g. mvn clean, mvn install etc. so that it searches for settings.xml in .m2 folder and when not found creates one.
So long story cur short,
open cmd -> mvn install
It will show could not find any projects(Don't worry maven is working fine :P)
now check your user folder.
P.S. If still not able to view .m2 folder try unhiding hidden items.
Use mvn -X or mvn --debug to find out from which different locations Maven reads settings.xml. This switch activates debug logging. Just check the first lines of mvn --debug | findstr /i /c:using /c:reading.
Right, Maven uses the Java system property user.home as location for the .m2 folder.
But user.home does not always resolve to %USERPROFILE%\.m2. If you have moved the location of your Desktop folder to another place, user.home might resolve to the parent directory of this new Desktop folder. This happens when using Windows Vista or a more recent Windows together with Java 7 or any older Java version.
The blog post Java’s “user.home” is Wrong on Windows describes it very well and gives links to the official bug reports. The bug is marked as resolved in Java 8. The comment of the blog's visitor Lars proposes a nice workaround.
Do you have the file system display config set up to show hidden files and folders? If I remember correctly, by default it's hidden. Should be under c:\users\username\.m2.
If the default .m2 is unable to find, maybe someone changed the default path. Issue the following command to find out where is the Maven local repository,
mvn help:evaluate -Dexpression=settings.localRepository
The above command will scan for projects and run some tasks.
Final outcome will be like below
As you can see in the picture the maven local repository is C:\Users\X\.m2\repository
Check the configurations in {M2_HOME}\conf\setting.xml as mentioned in the following link.
http://www.mkyong.com/maven/where-is-maven-local-repository/
Hope this helps.
Is there some command to create this folder?
If smb face this issue again, you should know the most simple way to create .m2 folder. If you unzipped maven and set up maven path variable - just try mvn clean command from anywhere you like! Dont be afraid of error messages when running - it works and creates needed directory.
If I'm right, it's just because you are missing the cd command. Try c:\Users\Jonathan\cd .m2/.