5c205225d4
* ErrorOut outputs to stderr * Start message is magenta now * Add EvalExAuto which creates end messages from first word in start message Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
89 lines
2.5 KiB
Bash
89 lines
2.5 KiB
Bash
#! /bin/bash
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# common-helpers.inc
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# (c) Copyright 2018 Andreas Müller <schnitzeltony@gmail.com>
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# Licensed under terms of GPLv2
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#
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# This script contains some helper functions and can be sourced by other
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# scripts
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# set terminal styles
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# are we on terrminal?
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if [ -t 1 ] ; then
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# tput available?
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if [ ! "x`which tput 2>/dev/null`" = "x" ] ; then
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# supports colors ?
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ncolors=`tput colors`
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if [ -n "$ncolors" -a $ncolors -ge 8 ] ; then
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style_bold="`tput bold`"
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style_underline="`tput smul`"
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style_standout="`tput smso`"
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style_normal="`tput sgr0`"
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style_black="`tput setaf 0`"
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style_red="`tput setaf 1`"
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style_green="`tput setaf 2`"
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style_yellow="`tput setaf 3`"
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style_blue="`tput setaf 4`"
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style_magenta="`tput setaf 5`"
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style_cyan="`tput setaf 6`"
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style_white="`tput setaf 7`"
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fi
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fi
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fi
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# base tempdir
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base_tempdir=`mktemp -u`
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base_tempdir=`dirname "$base_tempdir"`
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# ErrorOut outputs error text in first param and exits script
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ErrorOut() {
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echo -e "\n${style_red}${style_bold}${1}${style_normal}\n" >&2
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exit -1
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}
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# EvalEx executes a command, checks if it succeeds and ouputs messages
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# It expectes the following parameters:
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# 1. Command
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# 2. Message on start
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# 3. Message on successful end
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# 4. Message on error end
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EvalEx() {
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if [ -n "${2}" ] ; then
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echo -e "${style_magenta}${2}${style_normal}"
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fi
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if eval ${1} ; then
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if [ -n "${3}" ] ; then
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echo -e "${style_green}${3}${style_normal}"
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fi
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else
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if [ -n "${4}" ] ; then
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ErrorOut "${4}"
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else
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ErrorOut "An error occured!"
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fi
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fi
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}
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# EvalExAuto is similar it EvalEx and expectes the following parameters:
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# 1. Command
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# 2. Message on start
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# The end messages are created by extracting first word of start message
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# and appening 'done' respectively 'failed'
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EvalExAuto() {
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# Catch 'Start...' case
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StartAligned=`echo $2 | sed 's:\.: :'`
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EndMessageOk="`echo $StartAligned | awk '{ print $1 }'` done."
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EndMessageFail="`echo $StartAligned | awk '{ print $1 }'` failed!"
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EvalEx "$1" "$2" "$EndMessageOk" "$EndMessageFail"
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}
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# CheckPrerequisite checks if required hosttool is found on host. In case not
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# it outputs a message and exits script.
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CheckPrerequisite() {
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if [ "x`which $1 2>/dev/null`" = "x" ] ; then
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ErrorOut "You need to install $1 first!"
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fi
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}
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