Additional detail around individual commands.
The flow command line tool is made to be easy-to-use for simple cases.
Using the command
flow will type-check your current directory if the
.flowconfig file is present. A flow server will automatically be started if
The CLI tool also provides several other options and commands that allow you to control the server and build tools that integrate with Flow. For example, this is how the Nuclide editor integrates with Flow to provide autocompletion, type errors, etc. in its UI.
To find out more about the CLI just type:
This will give you information about everything that flow can do. Running this command should print something like this:
Usage: flow [COMMAND] [PROJECT_ROOT] Valid values for COMMAND: ast Print the AST autocomplete Queries autocompletion information check Does a full Flow check and prints the results check-contents Run typechecker on contents from stdin coverage Shows coverage information for a given file find-module Resolves a module reference to a file get-def Gets the definition location of a variable or property get-importers Gets a list of all importers for one or more given modules get-imports Get names of all modules imported by one or more given modules init Initializes a directory to be used as a flow root directory server Runs a Flow server in the foreground start Starts a Flow server status (default) Shows current Flow errors by asking the Flow server stop Stops a Flow server suggest Shows type annotation suggestions for given files type-at-pos Shows the type at a given file and position version Print version information Default values if unspecified: COMMAND status PROJECT_ROOT current folder Status command options: --color Display terminal output in color. never, always, auto (default: auto) --from Specify client (for use by editor plugins) --help This list of options --json Output results in JSON format --no-auto-start If the server is not running, do not start it; just exit --old-output-format Use old output format (absolute file names, line and column numbers) --one-line Escapes newlines so that each error prints on one line --retries Set the number of retries. (default: 3) --retry-if-init retry if the server is initializing (default: true) --show-all-errors Print all errors (the default is to truncate after 50 errors) --strip-root Print paths without the root --temp-dir Directory in which to store temp files (default: /tmp/flow/) --timeout Maximum time to wait, in seconds --version Print version number and exit
Example with custom project root:
mydir ├── frontend │ ├── .flowconfig │ └── app.js └── backend
flow check frontend
You can then, further dig into particular COMMANDs by adding the
So, for example, if you want to know more about how the autocomplete works, you can use this command:
flow autocomplete --help
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