Nutritious Pomegranate Muffins

    vfile
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    5.3.6 • Public • Published

    vfile

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    vfile is a small and browser friendly virtual file format that tracks metadata about files (such as its path and value) and lint messages.

    Contents

    unified

    vfile is part of the unified collective.

    What is this?

    This package provides a virtual file format. It exposes an API to access the file value, path, metadata about the file, and specifically supports attaching lint messages and errors to certain places in these files.

    When should I use this?

    The virtual file format is useful when dealing with the concept of files in places where you might not be able to access the file system. The message API is particularly useful when making things that check files (as in, linting).

    vfile is made for unified, which amongst other things checks files. However, vfile can be used in other projects that deal with parsing, transforming, and serializing data, to build linters, compilers, static site generators, and other build tools.

    This is different from the excellent vinyl in that vfile has a smaller API, a smaller size, and focuses on messages.

    Install

    This package is ESM only. In Node.js (version 12.20+, 14.14, 16.0+), install with npm:

    npm install vfile

    In Deno with esm.sh:

    import {VFile} from 'https://esm.sh/vfile@5'

    In browsers with esm.sh:

    <script type="module">
      import {VFile} from 'https://esm.sh/vfile@5?bundle'
    </script>

    Use

    import {VFile} from 'vfile'
    
    const file = new VFile({
      path: '~/example.txt',
      value: 'Alpha *braavo* charlie.'
    })
    
    console.log(file.path) // => '~/example.txt'
    console.log(file.dirname) // => '~'
    
    file.extname = '.md'
    
    console.log(file.basename) // => 'example.md'
    
    file.basename = 'index.text'
    
    console.log(file.history) // => ['~/example.txt', '~/example.md', '~/index.text']
    
    file.message('Unexpected unknown word `braavo`, did you mean `bravo`?', {
      line: 1,
      column: 8
    })
    
    console.log(file.messages)

    Yields:

    [
      [~/index.text:1:8: Unexpected unknown word `braavo`, did you mean `bravo`?] {
        reason: 'Unexpected unknown word `braavo`, did you mean `bravo`?',
        line: 1,
        column: 8,
        source: null,
        ruleId: null,
        position: {start: [Object], end: [Object]},
        file: '~/index.text',
        fatal: false
      }
    ]

    API

    This package exports the identifier VFile. There is no default export.

    VFile(options?)

    Create a new virtual file.

    • if options is string or Buffer, it’s treated as {value: options}
    • if options is a URL, it’s treated as {path: options}
    • if options is a VFile, shallow copies its data over to the new file

    All fields in options are set on the newly created VFile.

    Path related fields are set in the following order (least specific to most specific): history, path, basename, stem, extname, dirname.

    It’s not possible to set either dirname or extname without setting either history, path, basename, or stem as well.

    Example
    new VFile()
    new VFile('console.log("alpha");')
    new VFile(Buffer.from('exit 1'))
    new VFile({path: path.join('path', 'to', 'readme.md')})
    new VFile({stem: 'readme', extname: '.md', dirname: path.join('path', 'to')})
    new VFile({other: 'properties', are: 'copied', ov: {e: 'r'}})

    file.value

    Raw value (Buffer, string, null).

    file.cwd

    Base of path (string, default: process.cwd() or '/' in browsers).

    file.path

    Get or set the full path (string?, example: '~/index.min.js'). Cannot be nullified. You can set a file URL (a URL object with a file: protocol) which will be turned into a path with url.fileURLToPath.

    file.dirname

    Get or set the parent path (string?, example: '~'). Cannot be set if there’s no path yet.

    file.basename

    Get or set the basename (including extname) (string?, example: 'index.min.js'). Cannot contain path separators ('/' on unix, macOS, and browsers, '\' on windows). Cannot be nullified (use file.path = file.dirname instead).

    file.extname

    Get or set the extname (including dot) (string?, example: '.js'). Cannot contain path separators ('/' on unix, macOS, and browsers, '\' on windows). Cannot be set if there’s no path yet.

    file.stem

    Get or set the stem (basename w/o extname) (string?, example: 'index.min'). Cannot contain path separators ('/' on unix, macOS, and browsers, '\' on windows). Cannot be nullified.

    file.history

    List of filepaths the file moved between (Array<string>). The first is the original path and the last is the current path.

    file.messages

    List of messages associated with the file (Array<VFileMessage>).

    file.data

    Place to store custom information (Record<string, unknown>, default: {}). It’s OK to store custom data directly on the file but moving it to data is recommended.

    VFile#toString(encoding?)

    Serialize the file. When value is a Buffer, encoding is a character encoding to understand it as (string, default: 'utf8').

    Returns

    Serialized file (string).

    VFile#message(reason[, position][, origin])

    Constructs a new VFileMessage, where fatal is set to false, and associates it with the file by adding it to file.messages and setting message.file to the current filepath.

    Parameters
    • reason (string or Error) — human readable reason for the message, uses the stack and message of the error if given
    • place (Node, Position, or Point, optional) — place where the message occurred in the file
    • origin (string?, optional, example: 'my-npm-package:my-rule-name') — computer readable reason for the message
    Returns

    Message (VFileMessage).

    VFile#info(reason[, position][, origin])

    Like VFile#message(), but associates an informational message where fatal is set to null.

    Returns

    Message (VFileMessage).

    VFile#fail(reason[, position][, origin])

    Like VFile#message(), but associates a fatal message where fatal is set to true, and then immediately throws it.

    👉 Note: a fatal error means that a file is no longer processable.

    Throws

    Message (VFileMessage).

    Well-known fields

    The following fields are considered “non-standard”, but they are allowed, and some utilities use them:

    • stored (boolean) — whether a file was saved to disk, used by reporters
    • result (unknown) — sometimes files have a non-string, compiled, representation, which can be stored in the result field. One example is when turning markdown into React nodes. unified uses this field to store non-string results
    • map (Map) — sometimes files have a source map associated with them, this should be a Map type, which is equivalent to the RawSourceMap type from the source-map module

    There are also well-known fields on messages, see them in a similar section of vfile-message.

    List of utilities

    👉 Note: see unist for projects that work with nodes.

    Reporters

    👉 Note: want to make your own reporter? Reporters must accept Array<VFile> as their first argument, and return string. Reporters may accept other values too, in which case it’s suggested to stick to vfile-reporters interface.

    Types

    This package is fully typed with TypeScript. It exports the following additional types:

    • BufferEncoding — thing that can be given as x in file.toString(x)
    • Compatible — everything that can be passed as x in new VFile(x)
    • Data — thing at file.data
    • DataMap — interface you can add things to, to type your extensions of file.data
    • Map — source map interface as supported at file.map
    • Options — the fields that can be passed as options to new VFile(x)
    • Reporter — a reporter
    • ReporterSettings — the fields that can be passed to a reporter
    • Value — valid value
    • VFile — class of file itself

    DataMap can be augmented to include your extensions to it:

    declare module 'vfile' {
      interface DataMap {
        // `file.data.name` is typed as `string`.
        name: string
      }
    }

    Compatibility

    Projects maintained by the unified collective are compatible with all maintained versions of Node.js. As of now, that is Node.js 12.20+, 14.14+, and 16.0+. Our projects sometimes work with older versions, but this is not guaranteed.

    Contribute

    See contributing.md in vfile/.github for ways to get started. See support.md for ways to get help.

    This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.

    Sponsor

    Support this effort and give back by sponsoring on OpenCollective!

    Vercel

    Motif

    HashiCorp

    GitBook

    Gatsby

    Netlify

    Coinbase

    ThemeIsle

    Expo

    Boost Note

    Holloway


    You?

    Acknowledgments

    The initial release of this project was authored by @wooorm.

    Thanks to @contra, @phated, and others for their work on Vinyl, which was a huge inspiration.

    Thanks to @brendo, @shinnn, @KyleAMathews, @sindresorhus, and @denysdovhan for contributing commits since!

    License

    MIT © Titus Wormer

    Install

    npm i vfile

    DownloadsWeekly Downloads

    8,823,271

    Version

    5.3.6

    License

    MIT

    Unpacked Size

    61.1 kB

    Total Files

    21

    Last publish

    Collaborators

    • wooorm