workon
is a function. Function definition is local for a shell and not visible in the subshells (same as variables definitions).
You need to export the function, if you want to have it visible in subshells. From manual page for bash
:
export [-fn] [name[=word]] ...
export -p
The supplied names are marked for automatic export to the environment of subsequently executed commands. If the
-f
option is given, the names refer to functions. If no names are given, or if the-p
option is supplied, a list of names of all exported variables is printed. The-n
option causes the export property to be removed from each name. If a variable name is followed by=word
, the value of the variable is set to word.export
returns an exit status of 0 unless an invalid option is encountered, one of the names is not a valid shell variable name, or -f is supplied with a name that is not a function.
Therefore export -f workon
after function definition will solve your problems.