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#!/bin/bash
# Copyright 2021 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.
# Library of useful bash functions and variables.
RED=; GREEN=; YELLOW=; NORMAL=;
MAXWIDTH=0
if tput setaf 1 >& /dev/null; then
RED=$(tput setaf 1)
GREEN=$(tput setaf 2)
YELLOW=$(tput setaf 3)
NORMAL=$(tput sgr0)
MAXWIDTH=$(( $(tput cols) - 2 ))
fi
EXIT_CODE=0
export EXIT_CODE
info() { echo -e "${GREEN}$*${NORMAL}" 1>&2; }
warn() { echo -e "${YELLOW}$*${NORMAL}" 1>&2; }
err() { echo -e "${RED}$*${NORMAL}" 1>&2; EXIT_CODE=1; }
die() {
err "$@"
exit 1
}
dryrun=false
# runcmd prints an info log describing the command that is about to be run, and
# then runs it. It sets EXIT_CODE to non-zero if the command fails, but does not exit
# the script.
runcmd() {
msg="$*"
if $dryrun; then
echo -e "${YELLOW}dryrun${GREEN}\$ $msg${NORMAL}"
return 0
fi
# Truncate command logging for narrow terminals.
# Account for the 2 characters of '$ '.
if [[ $MAXWIDTH -gt 0 && ${#msg} -gt $MAXWIDTH ]]; then
msg="${msg::$(( MAXWIDTH - 3 ))}..."
fi
echo -e "$*\n" 1>&2;
"$@" || err "command failed"
}
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