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```python
def function(foo):
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lang-bash
envsubsthelpful - see for example Replace environment variables in a file with their actual values?cat mylist.txtdo i=$(echo $j | envsubst) if [[ -O $i ]] && [[ -d $i ]]; then echo "found it: $i (ie, $j)" break else echo "$i is not it." fi doneenvsubston the whole file - see answer below