#!/bin/sh

pecho() { printf %s\\n "$*"; }
log() { pecho "$@"; }
error() { log "ERROR: $@" >&2; }
fatal() { error "$@"; exit 1; }
try() { "$@" || fatal "'$@' failed"; }

try cd "${0%/*}"
try mkdir -p m4 build-aux
try autoreconf -fviW all

# Ignore changes to build-aux/tap-driver, but only if we're in a clone
# of the ddclient Git repository. Once CentOS 6 and RHEL 6 reach
# end-of-life we can delete build-aux/tap-driver.sh and this block of
# code. (tap-driver.sh is checked in to this Git repository only
# because we want to support all currently maintained CentOS and RHEL
# releases, and CentoOS 6 and RHEL 6 ship with Automake 1.11 which
# does not come with tap-driver.sh.)
command -v git >/dev/null || exit 0
git rev-parse --is-inside-work-tree >/dev/null 2>&1 || exit 0
cdup=$(try git rev-parse --show-cdup) || exit 1
[ -z "${cdup}" ] || exit 0
try git update-index --assume-unchanged -- build-aux/tap-driver.sh