macos - Should the .bashrc in the home directory load automatically?

Question

I added scala in my .bashrc file, but when I shut off my mac and turn it back on it does not find it. When i do

source ~/.bashrc 

all is back to normal. I would say the issue is with the whole file in general, but the problem, is I have other things in there that have worked just fine before, but the problem is persistent with scala. Anybody know why this is and explain why I am getting the problem? This is whats in my .bashrc file, which runs rvm and mysql correctly, but not scala:

PATH=$PATH:$HOME/.rvm/bin # Add RVM to PATH for scripting
export PATH="/usr/local/mysql/bin:$PATH"
export PATH="/Users/Zeroe/scala-2.9.1-1/bin:$PATH"

Answer 1

I figured out this diagram by adding echo "${BASH_SOURCE[0]}" to those scripts.

                     +-----------------+   +------FIRST-------+   +-----------------+
                     |                 |   | ~/.bash_profile  |   |                 |
login shell -------->|  /etc/profile   |-->| ~/.bash_login ------>|  ~/.bashrc      |
                     |                 |   | ~/.profile       |   |                 |
                     +-----------------+   +------------------+   +-----------------+
                     +-----------------+   +-----------------+
                     |                 |   |                 |
interactive shell -->|  ~/.bashrc -------->| /etc/bashrc     |
                     |                 |   |                 |
                     +-----------------+   +-----------------+
                     +-----------------+
                     |                 |
logout shell ------->|  ~/.bash_logout |
                     |                 |
                     +-----------------+

Note

1. []-->[] means source by workflow (Automatically).
2. [--->[] means source by convention （Manually. If not, nothing happen.）.
3. FIRST means find the first available, ignore rest