No this isn't possible, it's a JVM limitation. You can however spawn a new bb process within a new directory, if that helps.

Thank you I thought so… It wouldn’t really help I made a script that clone git repos into the file structure I like. I wanted it to also be able to jump to the new dir.

That's not even possible in bash, you can't change the cwd of the parent process

you can however create a new shell within a new directory after you clone

No makes sense. Thank you for the, as always, quick response!

yes, cd is a bash built-in. There is no binary called cd on your computer. Try which cd and it will come back blank.

you can use source perhaps to achieve what you want

crispin@vash:~$ echo "cd /etc" > test.sh
crispin@vash:~$ chmod a+x test.sh
crispin@vash:~$ ./test.sh 
crispin@vash:~$ source test.sh 
crispin@vash:/etc$ 

running ./test.sh runs it in a subshell

but running source test.sh evaluates the bash commands in the present shell context

your programme would have to spit out bash for you to source though... might be tricky

Thanks crispin! So I guess I would write a bash wrapper that calls my clone script that returns the path to cd to.

I think spawning a new shell from your script is easier though.

bb -e '(babashka.process/shell {:dir "/tmp"} (System/getenv "SHELL"))'

some virtual language wrappers (like virtualenv in python or rbenv in ruby) spit out a script that you source to "activate" the virtual env

@U04V15CAJ I get an Exception when I try to ^D out of the shell that command starts. Is that expected?

it's probably not an exception but just the printed process

you can also use exec to replace bb with the shell:

bb -e '(babashka.process/exec [(System/getenv "SHELL")] {:dir "/tmp"})'

Nice, that one shuts down nicely.

another way:

crispin@vash:~$ `bb -e '(println "cd /etc")'`
crispin@vash:/etc$ 

ah, exec doesn't allow changing directories

I think $() is the modern backticks

@U021UJJ3CQ6 This should work:

bb -e '(do (babashka.process/shell {:dir "/tmp"} (System/getenv "SHELL")) nil)'

this won't print the process

crispin@vash:~$ $(bb -e '(println "cd /etc")')
crispin@vash:/etc$ 

@U04V15CAJ Thank you very much the both of you. It now works as I wanted! See the full script here if you want: https://gist.github.com/zoren/371baf6afbc2327832bb86ae70d5c4cd