Re-open watch handlers `b.open()` - resume

[MadLittleMods]

Add b.open() that would re-open/resume watch handlers. This would be useful for re-using the same watchify instance when composing gulp tasks.

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In my current gulp setup, I have the following tasks and I re-use a single watchify instance.

• build: Bundle scripts
• watch: Watch scripts and bundle on changes
• default: Runs build then watch

If watch is run by itself, I execute an initial bundle to get the watch handlers active and ready. But if I am running the default task, I do not make that initial bundle as it was already done in the build task.

When using the build task by itself, it never exits because the file watchers; I can use b.close() in the build task but this results in the default->watch task no longer watching because the file watcher handles were closed earlier in default->build.

I would like to just re-open the file watcher handlers when I run the watch task.

[zertosh]

I really don't understand - I'm sorry. If you make a PR for what you're asking for, I'll gladly take a look.

[zertosh]

Hm I'm guessing this isn't an issue anymore. Closing for lack of activity.

[MadLittleMods]

It is still an issue but the use case can be solved by just using browserify when you want to do a build and exit and watchify for developing and watching.

I was looking to only use watchify and close/open based on whether watching was needed.