Shell: Check "return" behavior using at top level.

README.md

Check "return" behavior using at top level.

Run with ENV1.

% export ENV1=1
% /bin/sh ./test.sh
ENV1 found
a=1, b=2
% echo $?
0

Run without ENV1

% /bin/sh ./test.sh
Skip
% echo $?
1

source.sh

#!/bin/sh

a=1
b=2

if [[ -z "$ENV1" ]]; then
  echo "ENV1 found"
  return 0
else
  echo "Skip"
fi

exit 1

test.sh

#!/bin/sh

. ./source.sh
echo "a=$a, b=$b"