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ask.sh
executable file
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ask.sh
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#!/bin/bash
# Source : https://gist.github.com/davejamesmiller/1965569#file-ask-sh
ask() {
local prompt default reply
if ${SKIP_ASK:-false}; then
return 0
fi
if [[ ${2:-} = 'Y' ]]; then
prompt='Y/n'
default='Y'
elif [[ ${2:-} = 'N' ]]; then
prompt='y/N'
default='N'
else
prompt='y/n'
default=''
fi
while true; do
# Ask the question (not using "read -p" as it uses stderr not stdout)
echo -n "$1 [$prompt] "
# Read the answer (use /dev/tty in case stdin is redirected from somewhere else)
read -r reply </dev/tty
# Default?
if [[ -z $reply ]]; then
reply=$default
fi
# Check if the reply is valid
case "$reply" in
Y*|y*) return 0 ;;
N*|n*) return 1 ;;
esac
done
}