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Read File List

Read the entire contents of each file in a file list.

Installation

npm install @stdlib/fs-read-file-list

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
• To use as a general utility for the command line, install the corresponding CLI package globally.

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

var readFileList = require( '@stdlib/fs-read-file-list' );

readFileList( filepaths[, options], clbk )

Asynchronously reads the entire contents of each file in a file list.

readFileList( [ __filename ], onFiles );

function onFiles( error, files ) {
    if ( error ) {
        throw error;
    }
    console.dir( files );
    // => [{...}]
}

Each file is represented by an object with the following fields:

• file: file path.
• data: file contents as either a Buffer or string.

The function accepts the same options as readFile().

readFileList.sync( filepaths[, options] )

Synchronously reads the entire contents of each file in a file list.

var out = readFileList.sync( [ __filename ] );
if ( out instanceof Error ) {
    throw out;
}
console.dir( out );
// => [{...}]

The function accepts the same options as readFile.sync().

Examples

var readFileList = require( '@stdlib/fs-read-file-list' );

/* Sync */

var files = readFileList.sync( [ __filename ], 'utf8' );
// returns <ObjectArray>

console.log( files instanceof Error );
// => false

files = readFileList.sync( [ 'beepboop' ], {
    'encoding': 'utf8'
});
// returns <Error>

console.log( files instanceof Error );
// => true

/* Async */

readFileList( [ __filename ], onFiles );
readFileList( [ 'beepboop' ], onFiles );

function onFiles( error, files ) {
    if ( error ) {
        if ( error.code === 'ENOENT' ) {
            console.error( 'A file does not exist.' );
        } else {
            throw error;
        }
    } else {
        console.dir( files );
    }
}

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CLI

Installation

To use as a general utility, install the CLI package globally

npm install -g @stdlib/fs-read-file-list-cli

Usage

Usage: read-file-list [options] <filepath1> <filepath2> ...

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.
  --enc, --encoding encoding   Encoding.
         --flag flag           Flag. Default: 'r'.

Notes

• Relative file paths are resolved relative to the current working directory.
• Errors are written to stderr.
• File contents are written to stdout as newline-delimited JSON (NDJSON).

Examples

$ read-file-list ./README.md ./package.json
{"file":"...","data":"..."}
{"file":"...","data":"..."}

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Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.