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|
#!/bin/sh
set -eu
usage() {
cat <<-'EOF'
Usage:
prompt STRING|-
prompt -h
EOF
}
help() {
cat <<-'EOF'
Options:
-h, --help show this message
STRING the text to be displayed in the prompt
Display a prompt and return a value corresponding to the
response.
EOF
}
assert_arg() {
if [ -z "$1" ]; then
printf 'Missing %s.\n\n' "$2" >&2
usage >&2
exit 2
fi
}
for flag in "$@"; do
case "$flag" in
--)
break
;;
--help)
usage
help
exit
;;
*)
;;
esac
done
while getopts 'h' flag; do
case "$flag" in
h)
usage
help
exit
;;
*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
STRING="${1:-}"
assert_arg "$STRING" 'STRING'
printf '%s' "$STRING"
printf ' [Y/n]: '
read -r yesno
if [ "$yesno" != 'n' ] && [ "$yesno" != 'N' ]; then
exit 0
else
exit 1
fi
|
