Flow CLI

Flow 命令行工具旨在为简单情况提供易用性。

使用命令 flow 将在当前目录中进行类型检查，前提是存在 .flowconfig 文件。如果需要，将自动启动 Flow 服务器。

CLI 工具还提供其他几个选项和命令，允许您控制服务器和构建工具，这些工具与 Flow 集成。例如，这就是 Nuclide 编辑器如何与 Flow 集成，在其 UI 中提供自动完成、类型错误等功能。

要了解有关 CLI 的更多信息，只需键入

flow --help

这将为您提供有关 Flow 可以执行的所有操作的信息。运行此命令应打印类似以下内容

Usage: flow [COMMAND] [PROJECT_ROOT]

Valid values for COMMAND:
  ast              Print the AST
  autocomplete     Queries autocompletion information
  batch-coverage   Shows aggregate coverage information for a group of files or directories
  check            Does a full Flow check and prints the results
  check-contents   Run typechecker on contents from stdin
  config           Read or write the .flowconfig file
  coverage         Shows coverage information for a given file
  cycle            Output .dot file for cycle containing the given file
  find-module      Resolves a module reference to a file
  find-refs        Gets the reference locations of a variable or property
  force-recheck    Forces the server to recheck a given list of files
  get-def          Gets the definition location of a variable or property
  graph            Outputs dependency graphs of flow repositories
  init             Initializes a directory to be used as a flow root directory
  ls               Lists files visible to Flow
  lsp              Acts as a server for the Language Server Protocol over stdin/stdout [experimental]
  print-signature  Prints the type signature of a file as extracted in types-first mode
  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
  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
  --quiet              Suppresses the server-status information that would have been printed to stderr
  --retries            Set the number of retries. (default: 3)
  --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

使用自定义项目根目录的示例

mydir
├── frontend
│   ├── .flowconfig
│   └── app.js
└── backend

flow check frontend

然后，您可以通过添加 --help 标志进一步深入了解特定命令。

例如，如果您想了解有关自动完成如何工作的更多信息，可以使用以下命令

flow autocomplete --help