servant/scripts/lib/common.sh

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#!/bin/bash -
#===============================================================================
#
# FILE: lib/common.sh
#
# DESCRIPTION: Common functions for servant's shell scripts
# Meant to be sourced rather than run.
#
# REQUIREMENTS: bash >= 4
#===============================================================================
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DIR=$( dirname $( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd ))
ROOT=$( dirname $DIR )
DRY_RUN=false
POSITION="none"
SOURCES_TXT="$( dirname $DIR)/sources.txt"
CABAL=${CABAL:-cabal}
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TRAVIS=${TRAVIS:-false}
declare -a SOURCES
SOURCES=$(awk -F= '{print $1}' "$SOURCES_TXT")
join () { local IFS="$1"; shift; echo "$*"; }
versions_equal () {
local NUM=$(cd "$ROOT" && find . -name 'servant*.cabal' | xargs grep "^version:" | awk '{ print $2 }' | uniq -c | wc -l)
if [ 1 -eq $NUM ] ; then
return 0
else
echo "versions of packages are not all the same!" && exit 1
fi
}
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travis_retry() {
# From
# https://github.com/travis-ci/travis-build/blob/18bd04e965b9bfaa49cd6bdcd8dcb1513b8d2fcd/lib/travis/build/templates/header.sh
local result=0
local count=1
while [ $count -le 3 ]; do
[ $result -ne 0 ] && {
echo -e "\n${ANSI_RED}The command \"$@\" failed. Retrying, $count of 3.${ANSI_RESET}\n" >&2
}
"$@"
result=$?
[ $result -eq 0 ] && break
count=$(($count + 1))
sleep 1
done
[ $count -gt 3 ] && {
echo -e "\n${ANSI_RED}The command \"$@\" failed 3 times.${ANSI_RESET}\n" >&2
}
return $result
}