Anybody know how to use a bash variable in an

Exec

task’s command? Escaping the dollar sign doesn’t seem to work. For example:

commandLine = listOf("echo", "Declared in env GOOGLE_APPLICATION_CREDENTIALS=\$GOOGLE_APPLICATION_CREDENTIALS")

Output:

Declared in env GOOGLE_APPLICATION_CREDENTIALS=$GOOGLE_APPLICATION_CREDENTIALS

call bash with

-c

, rather than using exec directly

Everything inside the list you create is escaped, no matter what you do. It's equivalent to the following Bash line

'echo' 'Declared in env GOOGLE_APPLICATION_CREDENTIALS=$GOOGLE_APPLICATION_CREDENTIALS'

and nothing gets interpreted. Do what @octylFractal said or use

System.getenv

.

realistically, it's not equivalent to a bash anything, it's likely doing something similar to

execve

& friends -- that means that it's not using any bash builtins such as

echo

or

cd

Equivalence depends on how you exactly define it. The observable side effects and logical interpretation is equivalent. 😉

I suppose that depends on what you mean by "observable side effects" -- builtin echo and e.g.

/usr/bin/echo

can behave differently, but don't in most cases 😛

They all print something to STDOUT.

Thank you both! :)