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#!/bin/bash

# This script will let you upload sources/blobs to new CentOS lookaside cache
# requirements:
#  - curl
#  - valid TLS certs from https://accounts.centos.org (or dev instance for testing)

# Some variables, switch for new url
lookaside_baseurl=$LOOKASIDE_BASEURL
hash_parameter="sha512"

if [ -z $LOOKASIDE_BASEURL ]; then
	lookaside_baseurl="https://git.centos.org"
	echo "Base URL set to default: $lookaside_baseurl"
fi

function usage {

	cat <<EOF

	You need to call the script like this : $0 -arguments
	
			-f : filename/source to upload (required, default:none)
			-n : package name for that source (requred, default:none, example "httpd")
			-h : display this help

	It is also possible to amend the default base url (currently set to https://git.centos.org):
	LOOKASIDE_BASEURL=<urlOfYourChoice> ./lookaside_upload_sig ...
EOF
}

function varcheck {
	if [ -z "$1" ]; then
		usage
		exit 1
	fi

}

function f_log {
	echo "[+] CentOS Lookaside upload tool -> $*"
}

while getopts “hf:n:” OPTION; do
	case $OPTION in
	h)
		usage
		exit 1
		;;
	f)
		file=$OPTARG
		;;
	n)
		pkgname=$OPTARG
		;;
	?)
		usage
		exit
		;;
	esac
done

varcheck $file
varcheck $pkgname

if [ ! -f ~/.centos.cert ]; then
	f_log "No mandatory TLS cert found (~/.centos.cert) .."
	f_log "please use centos-cert to retrieve your ACO TLS cert"
	exit 1
fi

if [ ! -f "${file}" ]; then
	f_log "Source to upload ${file} not found"
	exit 2
fi

checksum="$(${hash_parameter}sum ${file} | awk '{print $1}')"

f_log "Checking if file already uploaded"
local_size=$(stat -c %s ${file})
http_code=$(curl -s -o /dev/null -w "%{http_code}" ${lookaside_baseurl}/sources/${pkgname}/${file}/${hash_parameter}/${checksum}/${file})
remote_size=$(curl --silent -i --head ${lookaside_baseurl}/sources/${pkgname}/${file}/${hash_parameter}/${checksum}/${file} | grep "Content-Length" | cut -f 2 -d ':' | tr -d [:blank:] | tr -d '\r')

if [ "$http_code" -eq 200 ] && [ "$local_size" -eq "$remote_size" ]; then
	f_log "File already uploaded"
	exit 3
fi

f_log "Initialing new upload to lookaside"
f_log "URL : $lookaside_baseurl"
f_log "Source to upload : ${file} "
f_log "Hash parameter : ${hash_parameter}"
f_log "Package name: $pkgname"
f_log "${hash_parameter}sum: ${checksum}"
f_log " ====== Trying to upload ======="
echo ""

# Concatenating sha512
hash_cmd="$(${hash_parameter}sum ${file} | awk '{print $1}')"
curl ${lookaside_baseurl}/sources/upload_sig.cgi \
	--fail \
	--cert ~/.centos.cert \
	--form "name=${pkgname}" \
	--form "hash=${hash_parameter}" \
	--form "${hash_parameter}sum=${hash_cmd}" \
	--form "file=@${file}" \
	--progress-bar | tee /dev/null

upload_result="${PIPESTATUS[0]}"

if [ "$upload_result" -ne "0" ]; then
	f_log "[ERROR] Something didn't work to push to ${lookaside_baseurl}/sources/${pkgname}/${checksum}"
	f_log "[ERROR] Verify at the server side"
	exit 1
fi

f_log "Validating that source was correctly uploaded ...."
remote_size=$(curl --silent -i --head ${lookaside_baseurl}/sources/${pkgname}/${file}/${hash_parameter}/${checksum}/${file} | grep "Content-Length" | cut -f 2 -d ':' | tr -d [:blank:] | tr -d '\r')
if [ "$local_size" -eq "$remote_size" ]; then
	f_log "[SUCCESS] Source should be available at ${lookaside_baseurl}/sources/${pkgname}/${file}/${hash_parameter}/${checksum}/${file}"
else
	f_log "[ERROR] it seems there is a mismatch with source size and remote file size"
fi