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