A stupid CLI to interact with the Marathon API

ma-cli.sh

#!/bin/bash -eu

help() {
  echo '
A cli to interact with the Marathon API

Usage:
  ma-cli.sh [command]

Available Commands:
  apps:ls             List all apps
  apps:show           Show an app
  apps:restart        Restart an app
  apps:delete         Delete an app
  deployments:ls      List all deployments
  deploy <jsonFile>   Deploy or redeploy an application
'
}

api() {
  declare uri=$1 && shift
  curl -s \
    -H "Authorization: Basic $MARATHON_AUTH" "$MARATHON_API/$uri" \
    -H 'content-type: application/json' \
     $@
}

apps:ls() {
  api v2/apps | jq '[.apps[] | {id:.id}]'
}

apps:show() {
  declare appID=$1
  api v2/apps/$appID | jq '.app | {
    id: .id, cmd: .cmd, container: .container, labels: .labels, constraints: .constraints
  }'
}

apps:restart() {
  declare appID=$1
  api v2/apps/$appID/restart | jq .
}

apps:delete() {
  declare appID=$1
  api v2/apps/$appID -XDELETE | jq .
}

apps:deploy() {
  declare jsonFile=$1 options=${2:-}
  local appID=$(jq -r ".id" $jsonFile)

  # Replace secrets
  cp $jsonFile $jsonFile.tmp
  for var in $(grep = secrets/vars.env); do
    key=$(cut -d '=' -f1 <<< $var)
    value=$(cut -d '=' -f2 <<< $var)
    sed -i "s|\$$key|$value|g" $jsonFile.tmp
  done

  api "v2/apps/$appID$options" -XPUT -d @$jsonFile.tmp
  rm $jsonFile.tmp
}

deployments() {
  api v2/deployments | jq -c '.[] | .currentActions'
}


main() {
  declare cmd=${1:-""} && shift || true
  case $cmd in

    ls|apps:ls               ) apps:ls           ;;
    apps:show                ) apps:show $1      ;;
    apps:restart             ) apps:restart $1   ;;
    apps:delete              ) apps:delete  $1   ;;
    deployments:ls           ) deployments       ;;

    d|deploy )
      declare jsonFile=$1 options=${2:-}
      apps:deploy $jsonFile $options ;;

    h|help ) help ;;
    ""|* ) echo "err: unknown command. Try apps:ls." ;;
  esac
}

main "$@"

> tree
.
├── apps
│   ├── api.json
│   ├── db.json
│   └── front.json
├── ma-cli.sh
├── Makefile
├── README.md
└── secrets
    ├── vars.env
    └── vars.env.encrypt