create-manifest

#!/usr/bin/env bash
#
# Copyright (c) 2015 Joyent Inc., All rights reserved.
#
# Create an image manifest for a given image file

set -euo pipefail
IFS=$'\n\t'

now=$(date -u +%Y-%m-%dT%TZ)
vm_uuid=$(uuid)
SUM=/usr/bin/sum
description=
filename=
kernel=
min_platform=
name=
os=
version=
homepage=

usage()
{
	cat <<USAGE

Create an image manifest from a given image file

Usage:
  $0 -f <filename> -k <kernel_version> -m <min_platform> -n <name> -v <version>

OPTIONS:
  -d <image description> (optional, default: "<NAME> <VERSION> VM Image")
  -f <filename of VM image> (required)
  -k <kernel version for the VM image> (required)
  -m <min_platform> (required)
  -n <name of VM image> (required)
  -o <the os of VM image> (optional, default: "other")
  -v <version of VM image> (required)
  -h <homepage link> (optional)

Example:

  $0 -f ubuntu-14.04.20150319.zfs.gz -k 3.13.0 -m 20150316T201553Z -n lx-ubuntu-14.04 -v 20150319

USAGE
	exit 1
}

while getopts d:f:k:m:n:o:v:h:? OPTION
do
	case $OPTION in
	d)
		description=${OPTARG}
		;;
	f)
		filename=${OPTARG}
		;;
	k)
		kernel=${OPTARG}
		;;
	m)
		min_platform=${OPTARG}
		;;
	n)
		name=${OPTARG}
		;;
	o)
		os=${OPTARG}
		;;
	v)
		version=${OPTARG}
		;;
	h)
		homepage=${OPTARG}
		;;
	*)
		usage
		;;
	esac
done

if [[ -z ${filename} || -z ${kernel} || -z ${min_platform} || -z ${name} || -z ${version} ]]; then
	echo "FATAL: All of -f, -k, -m, -n and -v are required."
	usage
fi

if [[ -z ${description} ]]; then
	description="${name} ${version} LX-brand image"
fi

if [[ -z ${os} ]]; then
	os="other"
fi

if [[ -z ${homepage} ]]; then
	homepage=https://docs.joyent.com/images
fi

if [[ ! -f ${filename} ]]; then
	echo "FATAL: ${filename} does not exist."
	usage
fi

shasum=$($SUM -x sha1 "${filename}" | cut -d' ' -f1)
filesize=$(wc -c < "${filename}")

cat <<EOF
{
  "v": "2",
  "name": "${name}",
  "version": "${version}",
  "type": "lx-dataset",
  "description": "${description}",
  "homepage": "${homepage}",
  "published_at": "${now}",
  "os": "${os}",
  "files": [
    {
      "sha1": "${shasum}",
      "size": ${filesize},
      "compression": "gzip"
    }
  ],
  "requirements": {
    "networks": [
      {
        "name": "net0",
        "description": "public"
      }
    ],
    "min_platform": {
         "7.0": "${min_platform}"
       },
    "brand": "lx"
  },
  "uuid": "${vm_uuid}",
  "public": false,
  "owner": "00000000-0000-0000-0000-000000000000",
  "tags": {
    "role": "os",
    "kernel_version": "${kernel}"
  }
}
EOF

exit 0