j143 edited a comment on pull request #1325:
URL: https://github.com/apache/systemds/pull/1325#issuecomment-868991300
Should we use `cd`?
The `pushd` and `popd` may work like, which is a built-in function.
```sh
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"
}
```
Does this spawn a subshell?
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