BigPanda deploy shell script

bigpanda_deploy.sh

#!/bin/bash

function start {
    if [ -z "$BP_API_TOKEN" ]; then
        echo "$0: Please set \$BP_API_TOKEN." >&2
        exit 1
    fi

    cat >$TMPFILE <<EOF
{
  "component": "$1",
  "version": "$2",
  "source_system": "bash",
EOF
    [ -n "$4" ] && echo "  \"env\": \"$4\"," >> $TMPFILE
    [ -n "$5" ] && echo "  \"description\": \"$5\"," >> $TMPFILE
    [ -n "$6" ] && echo "  \"owner\": \"$6\"," >> $TMPFILE

    cat >>$TMPFILE <<EOF
  "hosts": [ $3 ]
}
EOF
    api_call "$BASE_URL/data/events/deployments/start" >/dev/null
        rm $TMPFILE
}

function success {
    if [ -z "$BP_API_TOKEN" ]; then
        echo "$0: Please set \$BP_API_TOKEN." >&2
        exit 1
    fi

    cat >$TMPFILE <<EOF
{ "component": "$1",
"version": "$2",
"hosts": [ $3 ],
"status": "success"
}
EOF
    api_call "$BASE_URL/data/events/deployments/end" >/dev/null
        rm $TMPFILE
}

function fail {
    if [ -z "$BP_API_TOKEN" ]; then
        echo "$0: Please set \$BP_API_TOKEN." >&2
        exit 1
    fi

    cat >$TMPFILE <<EOF
{ "component": "$1",
  "version": "$2",
  "hosts": [ $3 ],
EOF
    [ -n "$4" ] && echo \"errorMessage\": \"$4\", >> $TMPFILE
    cat >>$TMPFILE <<EOF
  "status": "failure"
}
EOF
    api_call "$BASE_URL/data/events/deployments/end" >/dev/null
        rm $TMPFILE
}

function help {
    case "$1" in
        start)
            echo "Usage: start [-e ENV] [-d DESCRIPTION] [-o OWNER] APP_NAME VERSION HOST [HOST [...]]"
            echo
            echo "APP_NAME      Application being deployed"
            echo "VERSION       Version of application being deployed"
            echo "HOST          List of hostnames that are included in the deployment"
            echo "ENV           Optional environment name"
            echo "DESCRIPTION   Optional deployment description"
            echo "OWNER         Optional deployment owner"
            ;;
        success)
            echo "Usage: success APP_NAME VERSION HOST [HOST [...]]"
            echo
            echo "APP_NAME      Application being deployed"
            echo "VERSION       Version of application being deployed"
            echo "HOST          List of hostnames the deployment succeeded on"
            ;;
        fail)
            echo "Usage: fail [-m MESSAGE] APP_NAME VERSION HOST [HOST [...]]"
            echo
            echo "APP_NAME      Application being deployed"
            echo "VERSION       Version of application being deployed"
            echo "HOST          List of hostnames the deployment failed on"
            echo "MESSAGE       Optional error message"
            ;;
        '')
            echo "$0: Send deployment info to BigPanda"
            echo
            echo "List of commands:"
            echo "start         Notify a deployment has started"
            echo "success       Notify a deployment has succeeded"
            echo "fail          Notify a deployment has failed"
            echo "help          Get help about commands."
            echo
            echo "Run '$0 help COMMAND' for info about that command"
            ;;
        *)
            echo "Usage: help COMMAND";
            echo
            echo "COMMAND can be start, success or fail"
            ;;
    esac
}

function usage {
    echo "Usage: $0 COMMAND arguments"
    echo
    echo "Run '$0 help' for more info"
}

function parse_args {
    while [ -n "$1" ]; do
        case "$1" in
            -h|--help)
                help $command
                exit
                ;;
            -e)
                shift
                if [ -z "$1" ]; then
                    echo "$0: missing environment for -e"
                    exit 1
                fi
                ENV=$1
                ;;
            -d)
                shift
                if [ -z "$1" ]; then
                    echo "$0: missing description for -d"
                    exit 1
                fi
                DESCRIPTION=$1
                ;;
            -o)
                shift
                if [ -z "$1" ]; then
                    echo "$0: missing owner for -o"
                    exit 1
                fi
                OWNER=$1
                ;;
            -m)
                shift
                if [ -z "$1" ]; then
                    echo "$0: missing message for -m"
                    exit 1
                fi
                MESSAGE=$1
                ;;
            -*)
                echo "$0: Illegal option: $1"
                exit 1
                ;;
            *)
                if [ -z "$APP_NAME" ]; then
                    APP_NAME=$1
                elif [ -z "$VERSION" ]; then
                    VERSION=$1
                elif [ -z "$HOSTS" ]; then
                    HOSTS="\"$1\""
                else
                    HOSTS="$HOSTS,\"$1\""
                fi
        esac
        shift
    done

    if [ -z "$APP_NAME" -o -z "$VERSION" -o -z "$HOSTS" ]; then
        echo "$0: missing component, version or host" >&2
        exit 1
    fi
}

function api_call {
    curl -# -f -i -X POST -H "Authorization: Bearer $BP_API_TOKEN" -H "Content-Type: application/json" -d "@$TMPFILE" "$@"
}

TMPFILE=/tmp/bigpanda_deployment
BASE_URL="https://api.bigpanda.io"
APP_NAME=
VERSION=
HOSTS=
ENV=
MESSAGE=
OWNER=
DESCRIPTION=

command=$1
shift


case "$command" in
    start)
        parse_args "$@"
        start "$APP_NAME" "$VERSION" "$HOSTS" "$ENV" "$DESCRIPTION" "$OWNER";;
    success)
        parse_args "$@"
        success "$APP_NAME" "$VERSION" "$HOSTS" ;;
    fail)
        parse_args "$@"
        fail "$APP_NAME" "$VERSION" "$HOSTS" "$MESSAGE" ;;
    help)
        help "$@" >&2 ;;
    *)
        usage >&2
        exit 1
    ;;
esac