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watchman_subscribe

Note

This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.

namespace HH;

function watchman_subscribe(
  string $json_query,
  string $path,
  string $sub_name,
  string $callback,
  ?string $socket_name = NULL,
): Awaitable<void>;

Parameters​

  • string $json_query
  • string $path
  • string $sub_name
  • string $callback
  • ?string $socket_name = NULL

Returns​