op-geth/swarm/dev/scripts/util.sh

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# shared shell functions
info() {
local msg="$@"
local timestamp="$(date +%H:%M:%S)"
say "===> ${timestamp} ${msg}" "green"
}
warn() {
local msg="$@"
local timestamp=$(date +%H:%M:%S)
say "===> ${timestamp} WARN: ${msg}" "yellow" >&2
}
fail() {
local msg="$@"
say "ERROR: ${msg}" "red" >&2
exit 1
}
# say prints the given message to STDOUT, using the optional color if
# STDOUT is a terminal.
#
# usage:
#
# say "foo" - prints "foo"
# say "bar" "red" - prints "bar" in red
# say "baz" "green" - prints "baz" in green
# say "qux" "red" | tee - prints "qux" with no colour
#
say() {
local msg=$1
local color=$2
if [[ -n "${color}" ]] && [[ -t 1 ]]; then
case "${color}" in
red)
echo -e "\033[1;31m${msg}\033[0m"
;;
green)
echo -e "\033[1;32m${msg}\033[0m"
;;
yellow)
echo -e "\033[1;33m${msg}\033[0m"
;;
*)
echo "${msg}"
;;
esac
else
echo "${msg}"
fi
}