ubuntu - Load users environment variables in a cronjob

How can I load the users environment variables in a cronjob?

---

I have a cronjob which should start a script every minute on my Ubuntu machine:

* * * * * /home/user/myscript.sh;

In this script I want to use environment variables like $JAVA_HOME and $M2_HOME to automatically start a build process. The problem is that those variables are set in the .bashrc via export JAVA_HOME=/../...

Therefore I source these files before executing my script:

* * * * * source ~/.bash_profile; source ~/.bashrc; /home/user/myscript.sh;

However, the variables aren't set! To test this I echo the environment variables via env to a log file:

env >> ~/env.log
echo $M2_HOME >> ~/env.log

The log file still doesn't contain the variables. Only the following are appended to the file (no $M2_HOME etc.):

LANGUAGE=en_US:en

HOME=/home/user
LOGNAME=user
PATH=/usr/bin:/bin
LANG=en_US.UTF-8
SHELL=/bin/sh
PWD=/home/user

If I run the script right in my shell all of the variables are print out to env.log.

The same happens when I put the source commands into the script file. Only if I remove the export keyword before the declaration of the variable it is visible by the echo $var command. But this is not a solution because I don't manage these declarations.

---

I tried the solution of @tripplee with the limited sh shell problem, but it still doesn't work. I further reduced it to a very simple cronjob without a second script to show the problematic:

* * * * * . $HOME/.bash_profile; . $HOME/.bashrc; env > $HOME/env.log;

cat /home/user/env.log:

LANGUAGE=en_US:en
HOME=/home/user
LOGNAME=user
PATH=/usr/bin:/bin
LANG=en_US.UTF-8
SHELL=/bin/sh
PWD=/home/user