rebrowser-parse

walk the dependency graph to generate json output that can be fed into browser-pack

example

var mdeps = require('rebrowser-parse');
var JSONStream = require('JSONStream');

var stringify = JSONStream.stringify();
stringify.pipe(process.stdout);

var file = __dirname + '/files/main.js';
mdeps(file).pipe(stringify);

output:

$ node example/deps.js
[
{"id":"/home/substack/projects/rebrowser-parse/example/files/main.js","source":"var foo = require('./foo');\nconsole.log('main: ' + foo(5));\n","entry":true,"deps":{"./foo":"/home/substack/projects/rebrowser-parse/example/files/foo.js"}}
,
{"id":"/home/substack/projects/rebrowser-parse/example/files/foo.js","source":"var bar = require('./bar');\n\nmodule.exports = function (n) {\n    return n * 111 + bar(n);\n};\n","deps":{"./bar":"/home/substack/projects/rebrowser-parse/example/files/bar.js"}}
,
{"id":"/home/substack/projects/rebrowser-parse/example/files/bar.js","source":"module.exports = function (n) {\n    return n * 100;\n};\n","deps":{}}
]

and you can feed this json data into browser-pack:

$ node example/deps.js | browser-pack | node
main: 1055

usage

usage: rebrowser-parse [files]

  generate json output from each entry file

methods

var mdeps = require('rebrowser-parse')

mdeps(files, opts={})

Return a readable stream of javascript objects from an array of filenames files.

Optionally pass in some opts:

• opts.transform - a string or array of string transforms (see below)

• opts.transformKey - an array path of strings showing where to look in the package.json for source transformations. If falsy, don't look at the package.json at all.

• opts.resolve - custom resolve function using the opts.resolve(id, parent, cb) signature that browser-resolve has

• opts.packageFilter - transform the parsed package.json contents before using the values. opts.packageFilter(pkg) should return the new pkg object to use.

transforms

rebrowser-parse can be configured to run source transformations on files before parsing them for require() calls. These transforms are useful if you want to compile a language like coffeescript on the fly or if you want to load static assets into your bundle by parsing the AST for fs.readFileSync() calls.

If the transform is a function, it should take the file name as an argument and return a through stream that will be written file contents and should output the new transformed file contents.

If the transform is a string, it is treated as a module name that will resolve to a module that is expected to follow this format:

var through = require('through');
module.exports = function (file) { return through() };

You don't necessarily need to use the through module to create a readable/writable filter stream for transforming file contents, but this is an easy way to do it.

When you call mdeps() with an opts.transform, the transformations you specify will not be run for any files in node_modules/. This is because modules you include should be self-contained and not need to worry about guarding themselves against transformations that may happen upstream.

Modules can apply their own transformations by setting a transformation pipeline in their package.json at the opts.transformKey path. These transformations only apply to the files directly in the module itself, not to the module's dependants nor to its dependencies.

install

With npm, to get the module do:

npm install rebrowser-parse

and to get the rebrowser-parse command do:

npm install -g rebrowser-parse

license

MIT