phaniarnab commented on pull request #1325:
URL: https://github.com/apache/systemds/pull/1325#issuecomment-869048610
> Should we use `cd`?
>
> The `pushd` and `popd` may work like, which is a built-in function.
>
> ```shell
> pushd ()
> {
> dirname=$1
> DIR_STACK="$dirname ${DIR_STACK:-$PWD' '}"
> cd ${dirname:?"missing directory name."}
> echo "$DIR_STACK"
> }
>
> popd ()
> {
> DIR_STACK=${DIR_STACK#* }
> cd ${DIR_STACK%% *}
> echo "$PWD"
> }
> ```
>
> source:
https://www.oreilly.com/library/view/learning-the-bash/1565923472/ch04s05.html
>
> Does this spawn a subshell?
Yes. Directory stack makes sense when working with multiple directories.
For our use case, you can save the `pwd` in a local variable, use `cd` to
enter your target folder, and later apply something like `cd $pwd` to get back
to your original location if needed.
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