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util.sh
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util.sh
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#!/bin/bash
# Copyright 2016 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
readonly reset=$(tput sgr0)
readonly green=$(tput bold; tput setaf 2)
readonly yellow=$(tput bold; tput setaf 3)
readonly blue=$(tput bold; tput setaf 6)
readonly timeout=$(if [ "$(uname)" == "Darwin" ]; then echo "1"; else echo "0.1"; fi)
function desc() {
maybe_first_prompt
echo "$blue# $@$reset"
prompt
}
function prompt() {
echo -n "$yellow\$ $reset"
}
started=""
function maybe_first_prompt() {
if [ -z "$started" ]; then
prompt
started=true
fi
}
# After a `run` this variable will hold the stdout of the command that was run.
# If the command was interactive, this will likely be garbage.
DEMO_RUN_STDOUT=""
function run() {
maybe_first_prompt
rate=25
if [ -n "$DEMO_RUN_FAST" ]; then
rate=1000
fi
echo "$green$1$reset" | pv -qL $rate
if [ -n "$DEMO_RUN_FAST" ]; then
sleep 0.5
fi
OFILE="$(mktemp -t $(basename $0).XXXXXX)"
script -eq -c "$1" -f "$OFILE"
r=$?
read -d '' -t "${timeout}" -n 10000 # clear stdin
prompt
if [ -z "$DEMO_AUTO_RUN" ]; then
read -s
fi
DEMO_RUN_STDOUT="$(tail -n 2 $OFILE | sed 's/\r//g')"
return $r
}
function relative() {
for arg; do
echo "$(realpath $(dirname $(which $0)))/$arg" | sed "s|$(realpath $(pwd))|.|"
done
}
trap "echo" EXIT