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About the developer

280north
175 Stars 76 Forks 1.8K Commits 8 Opened issues

Description

A JavaScript standard library, package manager, and more. [deprecated]

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Narwhal

A general purpose JavaScript platform

Narwhal is a cross-platform, multi-interpreter, general purpose JavaScript platform. It aims to provide a solid foundation for building JavaScript applications, primarily outside the web browser. Narwhal includes a package manager, module system, and standard library for multiple JavaScript interpreters. Currently Narwhal's Rhino support is the most complete, but other engines are available too.

Narwhal's standard library conforms to the CommonJS standard. It is designed to work with multiple JavaScript interpreters, and to be easy to add support for new interpreters. Wherever possible, it is implemented in pure JavaScript to maximize reuse of code among engines.

Combined with Jack, a Rack-like JSGI compatible library, Narwhal provides a platform for creating server-side JavaScript web applications and frameworks such as Nitro.

Homepage:

Source & Download:

Mailing list:

IRC:

Documentation

Note: If you are viewing this on GitHub, the links below will not work. Find the pages listed below in the docs/ directory of this repository.

Quick Start

Download Narwhal.

  • download and extract the zip or tar archive, or
  • git clone git://github.com/280north/narwhal.git

Put Narwhal on your

PATH
environment variable.
  • export PATH=$PATH:~/narwhal/bin
    , or
  • source narwhal/bin/activate

Run

narwhal
or
js
(they are equivalent).
  • js narwhal/examples/hello

Look at the options for Narwhal.

  • js --help

And for Tusk, the package manager and virtual environment tool.

  • tusk help

My First Web Server

Create a project "hello-web".

tusk init hello-web
cd hello-web

Enter your project as a "virtual environment" using

activate
or
sea
so that its libraries, binaries, and packages get automatically installed when you run Narwhal.
source bin/activate

or

bin/sea

Install some packages you will need, like Jack, the JSGI standard library for interoperable web services.

tusk install jack

Tusk gets downloaded and installed at "hello-web/packages/jack".

Create your

jackconfig.js
.
exports.app = function(env) {
    var text = "Hello, Web!";
    return {
        status : 200,
        headers : {
            "Content-Type" : "text/plain",
            "Content-Length" : String(text.length)
        },
        body : [text]
    };
};

Run it!

jackup

jackup
looks for a file called
jackconfig.js
in the current directory, or you can specify a path to a Jack application.

Open http://localhost:8080/ in your web browser.

Module System Basics

Narwhal "scripts" are CommonJS compatible modules, much like Python or Ruby modules. You do not have to use module pattern boilerplate; every module has its own local scope. You can get the exports object of another module by calling

require
.
var FS = require("file");
FS.isFile("foo.txt");

Module identifiers for

require
come in three flavors: "top-level", "relative", and "absolute". In the above case,
file
is a "top-level" identifier, so it will load any module called
file.js
in the
lib
directory of whichever package comes first in the load path. Relative identifiers have
.
or
..
as their first term, and terms are delimited with
/
. So, in the
foo/bar
module,
require('./baz')
will load
foo/baz
. Absolute module identifiers should not be used directly, but are produced when you execute a program module outside the module path. The module is identified by its fully-qualified path, starting with
/
.

You can export an object by assigning it to

exports
.
exports.foo = function () {
    return "Hello";
};

In a module, you also get a

module
object that has
module.id
and
module.path
properties so you can inspect your own top-level module identifier, and the path of your own module file. You also get a
require.main
property that tells you the top-level module identifier of the module that started the program.
if (require.main == module)
    main();

var settings = require(require.main);

var FS = require("file"); var path = FS.path(module.path); var indexHtml = path.resolve("./template/index.html").read();

Beyond the CommonJS specification, you also get the

print
function and the
system
module object for free. The
print
function accepts variadic arguments and writes a single line containing the arguments delimited by spaces to standard output and flushes. The
system
module can be explicitly required with
require("system")
as is encouraged since it is necessary for CommonJS compliance. Do not use
print
or
system
in standard libraries.

Summary of Included Modules

  • system
    :
    args
    ,
    env
    ,
    stdin
    ,
    stdout
    ,
    stderr
  • io
    :
    ByteIO
    (
    read
    ,
    write
    ,
    toByteString
    ,
    toString
    ),
    StringIO
    (
    read
    ,
    write
    ,
    copy
    ,
    flush
    ,
    iterator
    ,
    forEach
    ,
    readLine
    ,
    readLines
    ,
    next
    ,
    print
    ,
    toString
    ,
    substring
    ,
    slice
    ,
    substr
    ),
    IO
    (
    read
    ,
    write
    ,
    copy
    ,
    flush
    ,
    close
    ,
    isatty
    ),
    TextInputStream
    (
    raw
    ,
    readLine
    ,
    next
    ,
    iterator
    ,
    forEach
    ,
    close
    ),
    TextOutputStream
    (
    write
    ,
    writeLine
    ,
    writeLines
    ,
    print
    ,
    flush
    ,
    close
    )
  • file
    :
    open
    ,
    read
    ,
    write
    ,
    copy
    ,
    link
    ,
    symlink
    ,
    rename
    ,
    move
    ,
    remove
    ,
    mkdir
    ,
    mkdirs
    ,
    rmdir
    ,
    rmtree
    ,
    touch
    ,
    chmod
    ,
    chown
    ,
    list
    ,
    listTree
    ,
    listDirectoryTree
    ,
    copyTree
    ,
    isAbsolute
    ,
    isRelative
    ,
    isDrive
    ,
    isReadable
    ,
    isWritable
    ,
    glob
    ,
    globPaths
    ,
    fnmatch
    ,
    match
    ,
    cwd
    ,
    cwdPath
    ,
    join
    ,
    split
    ,
    resolve
    ,
    relative
    ,
    absolute
    ,
    normal
    ,
    canonical
    ,
    root
    ,
    dirname
    ,
    basename
    ,
    extension
    ,
    path
    ,
    new Path
    (
    to
    ,
    from
    , ...)
  • os
    :
    exit
    ,
    sleep
    ,
    popen
    (
    wait
    ,
    stdin
    ,
    stdout
    ,
    stderr
    ,
    communicate
    (
    status
    ,
    stdin
    ,
    stdout
    ,
    stderr
    )),
    system
    ,
    command
    ,
    status
    ,
    enquote
  • binary
    :
    Binary
    (
    toArray
    ,
    toByteArray
    ,
    toByteString
    ,
    indexOf
    ,
    lastIndexOf
    ,
    valueOf
    ),
    ByteString
    (
    length
    ,
    toString
    ,
    split
    ,
    slice
    ,
    substr
    ,
    substring
    ,
    toSource
    ),
    ByteArray
    (
    toString
    ,
    pop
    ,
    push
    ,
    extendRight
    ,
    unshift
    ,
    extendLeft
    ,
    reverse
    ,
    slice
    ,
    splice
    ,
    split
    ,
    forEach
    ,
    every
    ,
    some
    ,
    map
    ,
    reduce
    ,
    reduceRight
    ,
    displace
    ,
    toSource
    )
  • assert
    :
    AssertionError
    ,
    fail
    ,
    ok
    ,
    equal
    ,
    notEqual
    ,
    deepEqual
    ,
    notDeepEqual
    ,
    strictEqual
    ,
    notStrictEqual
    ,
    throws
    ,
    Assert
    (
    pass
    ,
    error
    ,
    section
    )
  • test
    :
    run
    ,
    Log
    (
    flush
    ,
    pass
    ,
    fail
    ,
    error
    ,
    begin
    ,
    end
    ,
    report
    ,
    print
    ,
    section
    ,
    Assert
    ),
    Section
    (
    print
    )
  • util
    :
    operator
    ,
    no
    ,
    object
    ,
    array
    ,
    string
    ,
    apply
    ,
    copy
    ,
    deepCopy
    ,
    repr
    ,
    keys
    ,
    values
    ,
    items
    ,
    len
    ,
    has
    ,
    get
    ,
    set
    ,
    getset
    ,
    cut
    ,
    put
    ,
    first
    ,
    last
    ,
    update
    ,
    deepUpdate
    ,
    complete
    ,
    deepComplete
    ,
    remove
    ,
    range
    ,
    forEach
    ,
    forEachApply
    ,
    map
    ,
    mapApply
    ,
    every
    ,
    some
    ,
    all
    ,
    any
    ,
    reduce
    ,
    reduceRight
    ,
    zip
    ,
    transpose
    ,
    enumerate
    ,
    is
    ,
    eq
    ,
    ne
    ,
    lt
    ,
    gt
    ,
    le
    ,
    ge
    ,
    mul
    ,
    by
    ,
    compare
    ,
    sort
    ,
    sorted
    ,
    reverse
    ,
    reversed
    ,
    hash
    ,
    unique
    ,
    escape
    ,
    enquote
    ,
    expand
    ,
    trim
    ,
    trimBegin
    ,
    trimEnd
    ,
    padBegin
    ,
    padEnd
    ,
    splitName
    ,
    joinName
    ,
    lower
    ,
    upper
    ,
    camel
    ,
    title
  • http
    :
    open
    ,
    read
  • sha
    ,
    sha256
    ,
    md5
    ,
    md4
    ,
    crc32
    :
    hash
  • utf8
    ,
    base64
    ,
    base16
    :
    encode
    ,
    decode
  • jsmin
    :
    encode
  • jsonpath
    :
    resolve
  • logger
    :
    Logger
    (
    add
    ,
    format
    )
  • args
    :
    Parser
    (
    parse
    ,
    option
    , (
    _
    ,
    __
    ,
    name
    ,
    displayName
    ,
    getName
    ,
    getDisplayName
    ,
    action
    ,
    set
    ,
    push
    ,
    inc
    ,
    dec
    ,
    choices
    ,
    def
    ,
    validate
    ,
    input
    ,
    output
    ,
    number
    ,
    oct
    ,
    hex
    ,
    integer
    ,
    natural
    ,
    whole
    ,
    bool
    ,
    todo
    ,
    inverse
    ,
    help
    ,
    halt
    ,
    hidden
    ),
    group
    (
    option
    ),
    def
    ,
    reset
    ,
    command
    ,
    arg
    ,
    args
    ,
    act
    ,
    action
    ,
    helpful
    ,
    usage
    ,
    help
    ,
    printHelp
    ,
    printUsage
    ,
    printCommands
    ,
    printOption
    ,
    printOptions
    ,
    error
    ,
    exit
    ,
    print
    ,
    check
    ),
    UsageError
    ,
    ConfigurationError
  • term
    :
    Stream
    (
    enable
    ,
    disable
    ,
    writeCode
    ,
    print
    ,
    printError
    ,
    write
    ,
    update
    ,
    moveTo
    ,
    moveBy
    ,
    home
    ,
    clear
    ,
    clearUp
    ,
    clearDown
    ,
    clearLine
    ,
    clearRight
    ,
    error
    (
    print
    ,
    write
    )),
    colors
    ,
    stream
  • uuid
    :
    uuid
  • mime
    :
    bestMatch
    ,
    parseMimeType
    ,
    parseMediaRange
    ,
    fitnessAndQualityParsed
    ,
    qualityParsed
    ,
    quality
  • html
    :
    escapeHTML
    ,
    stripTags
  • ref-send
    ,
    promise
    ,
    events
    :
    when
    ,
    defer
    (
    resolve
    ,
    reject
    ,
    promise
    ),
  • event-loop
    :
    enqueue
  • printf
    :
    printf
    ,
    fprintf
    ,
    sprintf
  • querystring
    :
    unescape
    ,
    escape
    ,
    stringify
    ,
    parseQuery
  • sandbox
    :
    Sandbox
  • loader
    :
    Loader
    (
    resolve
    ,
    resolvePkg
    ,
    find
    ,
    fetch
    ,
    load
    ,
    reload
    ,
    isLoaded
    ,
    hasChanged
    ,
    paths
    ,
    extensions
    ),
    resolve
    ,
    resolvePkg
  • packages
    :
    order
    ,
    catalog
  • interpreter
    :
    Context
    (
    eval
    ,
    importScript
    ,
    importScripts
    ,
    Module
    ,
    Function
    )
  • zip
    :
    unzip
    ,
    Unzip
    (
    iterator
    ,
    forEach
    ,
    close
    ),
    Entry
    (
    getName
    ,
    isDirectory
    ,
    open
    ,
    read
    ,
    copy
    )

Contributors

License

Copyright (c) 2009, 280 North Inc. <280north.com>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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