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sfn-cli

Command line interface for inspecting Amazon StepFunctions executions and building state machine definitions.

Installation

npm i -g @mhlabs/sfn-cli

Usage

Usage: sfn [options] [command]

Options:
  -v, --vers         output the current version
  -h, --help         display help for command

Commands:
  build|b [options]  Creates, explores and extends a StepFunctions ASL definition
  help [command]     display help for command

Create / modify a state machine definition

Command: $ sfn build --definition-file my-definition.yaml

If the my-definition.yaml file doesn't exist, you will be prompted to create it. The tool will then create a skeleton of an ASL definition and guide you through creating the initial state.

demo

Browse and inspect state machines

Command: $ sfn inspect

Options:
  -n, --name-prefix [prefix]          Name prefix of state machine (optional) (default: "")
  -s, --status-filter [statusFilter]  Execution status filter. One of RUNNING | SUCCEEDED | FAILED | TIMED_OUT | ABORTED (optional)
  -p, --profile [profile]             AWS profile to use (default: "default")
  --region [region]                   The AWS region to use. Falls back on AWS_REGION environment variable if not specified

demo

Real time sync your local ASL with the cloud

Prerequisites is that the state machine is already deployed and that the local ASL definition matches the one that's deployed. This command supports SAM's DefinitionSubstitutions and a key/value map between substitution keys and actual values will be compiled at start-up.

Command: $ sfn sync

Usage: sfn sync|s [options]

Syncs a StepFunctions ASL file with the cloud

Options:
  -s, --stack-name [stackName]        The name of the deployed stack (required)
  -t, --template-file [templateFile]  Path to SAM template file (default: "template.yaml")
  -p, --profile [profile]             AWS profile to use (default: "default")
  --region [region]                   The AWS region to use. Falls back on AWS_REGION environment variable if not specified
  -h, --help                          display help for command

demo

Known issues

  • Boolean logic in Choice states is not yet implemented
  • By design, the tool will not guide you through adding ARNs and other parameters to SDK integrations. This is best done in a code editor.