How can I make bash wait for a process to finish before continuing on with a script? [closed]

Answer 1

You don't have to do anything else than :

sed -e 's/:[^:\/\/]/="/g;s/$/"/g;s/ *=/=/g' in.yaml > /path/to/out.sh
source /path/to/out.sh

the shell by default run commands one by ones, so it will run source when sed will finish.

For your error, you should put the full path of out.sh in your source command.

Answer 2

The source commands looks for the sourced file on your PATH when its name contains no slashes (but it only has to be readable; it does not have to be executable). You probably don't have the current directory on your PATH.

Try:

source ./out.sh