#!/bin/sh -e

# Copyright (c) 2014 The crouton Authors. All rights reserved.

# Use of this source code is governed by a BSD-style license that can be

# found in the LICENSE file of the source repository, which has been replicated

# below for convenience of distribution:

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions are

# met:

#

# * Redistributions of source code must retain the above copyright

# notice, this list of conditions and the following disclaimer.

# * Redistributions in binary form must reproduce the above

# copyright notice, this list of conditions and the following disclaimer

# in the documentation and/or other materials provided with the

# distribution.

# * Neither the name of Google Inc. nor the names of its

# contributors may be used to endorse or promote products derived from

# this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# This is an indirect script. The actual installer will be downloaded, cached,

# and run with any parameters provided. Cached installer will be retained for

# 30 minutes unless this downloader is newer than the timestamp of the cache.

# Set CROUTON_BRANCH to change the branch downloaded.

set -e

CROUTON_BRANCH="${CROUTON_BRANCH#master}"

INSTALLER="crouton${CROUTON_BRANCH:+-}${CROUTON_BRANCH:-}"

URL="https://github.com/dnschneid/crouton/raw/releases/$INSTALLER"

CACHEDIR="/tmp/${0##*/}-installer-cache"

CACHEFILE="$CACHEDIR/$INSTALLER"

MAXAGE="$((30*60))"

# Process arguments

while getopts ':a:f:k:m:M:n:p:P:r:s:t:T:' f; do

if [ "$f" = 'P' ]; then

export http_proxy="$OPTARG" https_proxy="$OPTARG" ftp_proxy="$OPTARG"

fi

done

# Check dates and update the cache

(umask 000; mkdir -p "$CACHEDIR")

if [ ! -s "$CACHEFILE" -o ! "$CACHEFILE" -nt "$0" ] || \

[ "`date -r "$CACHEFILE" '+%s'`" -lt "$((`date '+%s'`-$MAXAGE))" ]; then

if [ ! -f "$CACHEFILE" -o -w "$CACHEFILE" ]; then

echo "Downloading latest $INSTALLER installer..." 1>&2

trap "rm -f '$CACHEFILE'; exit 1" INT HUP TERM 0

if ! (umask 022; \

curl -# -L --connect-timeout 60 --max-time 300 --retry 2 \

"$URL" -o "$CACHEFILE"); then

echo "Failed to download $INSTALLER installer.

Check your internet connection or proxy settings (-P) and try again." 1>&2

exit 1

fi

trap - INT HUP TERM 0

else

echo "Insufficient permissions to refresh $INSTALLER installer." 1>&2

fi

fi

# If this script was called with '-x' or '-v', pass that along.

SETOPTIONS="-e"

if set -o | grep -q '^xtrace.*on$'; then

SETOPTIONS="$SETOPTIONS -x"

fi

if set -o | grep -q '^verbose.*on$'; then

SETOPTIONS="$SETOPTIONS -v"

fi

# Launch the real script

exec sh $SETOPTIONS "$CACHEFILE" "$@"

# Some junk to fix the MIME type

: ''