Executes code for each line of a file

foreach-line.sh

#!/bin/sh

# we use a heredoc for inliling the lines in the script, but they can be obtained from a file as well
# IMPORTANT: heredocs MUST use tabs, they cannot use space indentation
LINES=$(
	cat <<- EOF
		line1
		line2
		line3
	EOF
)

# prints:
# -line1-
# -line3-
# -line3-
echo "$LINES" | while IFS= read -r LINE
do
	echo "-$LINE-"
done