Add support for factor-bundle plugin

[gsantiago]

It would be awesome if simplifyify could support the factor bundle plugin. This saves a lot of bytes when We have to include multiple bundles in a same page.

Let's say I have two entry-points: x.js and y.js with both sharing modules in common.

We could run the following command to create the bundles:

simplifyify source/*.js -o dist/*.bundle.js

This will create two bundles: x.bundle.js and y.bundle.js. But both will have the same modules in common in each bundles. This is not good if We need to include both bundles in a same page.

So, we could add the factor-bundle option to resolve this problem:

simplifyify source/*.js -o dist/*.bundle.js --factor-bundle dist/common.bundle.js

This option would extract the common modules between the bundles into the common.bundle.js file.

[stringparser]

Actually I'm in the same situation. Searching for a browserify option for the common bundle end up here.

It might still be possible. In the factor-bundle readme it says:

you can pipe module-deps json directly into the factor-bundle command:

$ module-deps x.js y.js | factor-bundle \
  x.js -o bundle/x.js \
  y.js -o bundle/y.js \
  > bundle/common.js

or factor out an existing bundle already compiled by browserify:

$ browserify x.js y.js > bundle.js
$ browser-unpack < bundle.js | factor-bundle \
  x.js -o bundle/x.js \
  y.js -o bundle/y.js \
  > bundle/common.js

Have to try it.