#!/bin/sh
. $(dirname $0)/settings

TIMESTAMP="`date +%Y%m%d%H%M%S`"

# Expand $2 to $1 digits
# Example: digits 3 4
# Result: 004
digits() {
	local i
	echo -n $(
	 ( for i in `seq 1 $1`; do
		echo -n 0;
	done ; echo -n $2 ) | rev | cut -b1-$1 | rev)
}

# Determine the latest of a list of versions
# Current assumptions for simplicity that might cause problems
# in the future: Version numbers are fully numeric (no 1.2.3a),
# and consist of at most 4 components of at most 3 digits each.
#
# Example: latest 1.2.3 1.2.3.1 1.1.4.99 0.99 1
# Result: 1.2.3.1
latest() {
	local LATEST=0
	local LATESTID=0
	local VERSION
	local VERSIONID
	for VERSION in "$@"; do
		VERSIONID=$(digits 3 $(echo $VERSION |cut -d. -f1))$(digits 3 $(echo $VERSION |cut -d. -f2))$(digits 3 $(echo $VERSION |cut -d. -f3))$(digits 3 $(echo $VERSION |cut -d. -f4))
		[ $VERSIONID -lt $LATESTID ] && continue
		LATEST=$VERSION
		LATESTID=$VERSIONID
	done
	echo -n $LATEST
}

# Check out a Linaro AOSP git repository with
# corresponding upstream
checkout() {
	local D=$(dirname $1)
	local B=$(basename $1)
	[ -d $SRC ] || mkdir -p $SRC
	pushd $SRC
	mkdir -p $D
	cd $D
	rm -rf $B
	git clone ssh://$USER@android-review.linaro.org:29418/$1.git
	cd $B
	[ -n "$NAME" ] && git config user.name $NAME
	[ -n "$EMAIL" ] && git config user.email $EMAIL
	git remote add aosp https://android-review.googlesource.com/$1.git
	git fetch aosp || git remote rm aosp
	[ "$B" = "libpng" ] && git remote add upstream git://git.code.sf.net/p/libpng/code
	[ "$B" = "harfbuzz_ng" ] && git remote add upstream git://anongit.freedesktop.org/harfbuzz.git
	[ "$B" = "fio" ] && git remote add upstream git://git.kernel.dk/fio.git
	[ "$B" = "kmod" ] && git remote add upstream git://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git
	git fetch --all
	git pull
	popd
}

# Display an error
error() {
	echo "ERROR: $@"
}

# Display a warning
warning() {
	echo "WARNING: $@"
}

# Display a notice
notice() {
	echo "NOTICE: $@"
}

# Display something went ok
ok() {
	echo "OK: $@"
}