Working with Multiple Development Environments

Posted bySusan MustafaPosted inUncategorizedTags:, , ,

Requirements: Switch between different JDKs, MVN Versions, and Docker hubs on call

How? We will use Aliases

Prerequisites: Cygwin installed on windows (You can also do this on Linux – though you wont need Cygwin then)

Lets do it:

Install multiple JDK versions,

Install your different MVN versions

Create 2 different settings.xml file. Each of these files represent project specific repo details. Take note that I dont have settings.xml right now.

Install Cygwin:

https://www.cygwin.com/

Read about what .bashrc file is before continuing.

  • Find your .bashrc file, mine is located under C:\cygwin64\home\<username>
  • Update your .bashrc file and add the below code lines to it. Dont remove anything from the file.
  • You should replace <username> and <password> with your username and password
  • Both Mavens are installed under C:/, you can install them anywhere you want, make sure you update the path in .bashrc file.
  • Take note of where your .m2 is, default is under Users/<username>/.m2
  • Make a copy of your existing settings.xml file
  • Each alias will take the custom settings-xzy.xml file and overwrite the main settings.xml that your IDE and your MVN installation look at. 
export user=<username>
export password=<password>

#Defaults
export DEFAULT_PATH=$PATH
export MAVEN_3_5_2_HOME=/cygdrive/c/apache-maven-3.5.2
export MAVEN_3_6_3_HOME=/cygdrive/c/apache-maven-3.6.3
export SHELLOPTS
set -o igncr
 
 

   
export USER_HOME="/cygdrive/c/Users/$user"
 
  
alias uca='
PS1="\[\e]0;\w\a\]\n\[\e[32m\]UCA_\u@\h \[\e[33m\]\w\[\e[0m\]\n\$";
export JAVA_HOME="/cygdrive/c/Program Files/Java/jdk-11.0.7";
export M2_HOME=$MAVEN_3_6_3_HOME; 
export PATH=$M2_HOME/bin:$DEFAULT_PATH; 
export PATH=$JAVA_HOME/bin:$PATH;
cp $USER_HOME/.m2/settings-gcas.xml $USER_HOME/.m2/settings.xml;
docker logout;
docker login --username $user --password $password first.docker.hub;'

 
 
alias vcc='
export PS1="\[\e]0;\w\a\]\n\[\e[32m\]VCC_\u@\h \[\e[33m\]\w\[\e[0m\]\n\$";
export JAVA_HOME="/cygdrive/c/Program Files\Java\jdk1.8.0_201";
export M2_HOME=$MAVEN_3_5_2_HOME;
export PATH=$M2_HOME/bin:$DEFAULT_PATH;
export PATH=$JAVA_HOME/bin:$PATH;
cp $USER_HOME/.m2/settings-vcc.xml $USER_HOME/.m2/settings.xml;
docker logout;
docker login --username $user --password $password second.docker.hub;'

Restart your Cygwin and startup a new window for the .bashrc file to take effect.

Lets test the aliases:

$vcc

$uca



Thats it, easy! You can have as many aliases as you want, and as many versions of Java/MVN as you want for your different projects.

IDEAs such as Eclipse/Intellij allow you to have custom Project/Workspace settings, so I dont have t cover that.

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