bash script not reading alias in bashrc [duplicate]

Question

I have created an alias in the .bashrc file:

alias java='java -Xmx1200m'

This alias works when I run a java command from my shell directly.

However, when the java command is inside a bash script (script.sh), this alias does not get activated. How do I ensure that the aliases in .bashrc file are accepted in a bash script ??

Answer 1

Alias are not expanded in non-interactive shells.

The only way to make an alias is to source the target script with the one which contains the alias.

$ source .bashrc
$ . custom_script.sh

Answer 2

Quoting from the bash manual:

Aliases are not expanded when the shell is not interactive, unless the expand_aliases shell option is set using shopt (see The Shopt Builtin).

Saying the following in your script should make it work:

shopt -s expand_aliases