106 lines
3.0 KiB
Plaintext
106 lines
3.0 KiB
Plaintext
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{{alias}}( path[, options], predicate, clbk )
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Asynchronously resolves a path according to a predicate function by walking
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parent directories.
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When invoked, the predicate function is provided two arguments:
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- `path`: a resolved path
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- `next`: a callback to be invoked after processing a resolved path
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The `next` callback takes two arguments:
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- `error`: error argument
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- `result`: test result
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If a provided predicate function calls the `next` callback with a truthy
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`error` argument, the function suspends execution and immediately calls the
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`done` callback for subsequent `error` handling.
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The function immediately returns upon encountering a non-falsy `result`
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value and calls the `done` callback with `null` as the first argument and
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the resolved path as the second argument.
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If unable to resolve a path, the function returns `null` as the path result.
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Execution is *not* guaranteed to be asynchronous. To guarantee asynchrony,
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wrap the `done` callback in a function which either executes at the end of
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the current stack (e.g., `nextTick`) or during a subsequent turn of the
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event loop (e.g., `setImmediate`, `setTimeout`).
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Parameters
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----------
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path: string
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Path to resolve.
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options: Object (optional)
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Options.
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options.dir: string (optional)
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Base directory from which to search. Default: current working directory.
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predicate: Function
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The test function to invoke for each resolved path.
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clbk: Function
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Callback to invoke after resolving a path.
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Examples
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--------
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> function predicate( path, next ) {
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... setTimeout( onTimeout, path );
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... function onTimeout() {
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... console.log( path );
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... next( null, false );
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... }
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... };
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> function onPath( error, path ) {
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... if ( error ) {
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... console.error( error.message );
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... } else {
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... console.log( path );
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... }
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... };
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> {{alias}}( 'package.json', predicate, onPath );
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{{alias}}.sync( path[, options], predicate )
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Synchronously resolves a path according to a predicate function by walking
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parent directories.
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The predicate function is provided one argument:
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- `path`: a resolved path
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The function immediately returns upon encountering a truthy return value.
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If unable to resolve a path, the function returns `null` as the path result.
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Parameters
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----------
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path: string
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Path to resolve.
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options: Object (optional)
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Options.
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options.dir: string (optional)
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Base directory from which to search. Default: current working directory.
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predicate: Function
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The test function to invoke for each resolved path.
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Returns
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-------
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out: string|null
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Resolved path.
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Examples
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--------
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> function predicate() { return false; };
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> var out = {{alias}}.sync( 'package.json', predicate );
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See Also
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--------
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