Chrome 'open tab' reuse an empty tab when possible

[n3tr]

Still WIP: need to clean up duplicated code and found some unexpected behavior (both in master and this branch)

on startscript - If there're no debugging tab (localhost:3000) open, we will try to use empty tab instead of create new one. (fixes #1157)

Test plan

To invoke script, We can use both npm/yarn start or run osascript openChrome.applescript localhost:3000 inside /packages/react-dev-utils folder .

• No open chrome window: When chrome open with an empty tab, use the empty tab instead of create new one.
• Chrome window with debugging tab: Reuse debugging tab.
• Chrome window w/o debugging tab: Create new tab with url.
• Chrome window w/o debugging tab, but have an empty tab: Use empty tab.

# Setup
npm run create-react-app my-app
cd my-app
yarn start

Test env

• Browser: Google Chrome Version 54.0.2840.98
• OS: macOS Sierra 10.12.1

[gaearon]

Nice, thanks for looking into this! Let me know when it's more fleshed out.

[gaearon]

We found a person who knows AppleScript.
😄

[n3tr]

@gaearon I think it's ready for review 👍

Actually, It's my first time with Apple Script and I can't believe in myself I can write this language 😅

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[n3tr]

btw I found an unexpected behavior, if you have 2 windows open and not focus on the window which is running debugging tab. when we run the script, sometime it focuses on wrong window and won't select running tab. It works fine in all case if we're focusing on the debugging window 🙊

It happens in both master and this branch, I have debug the code and nothing wrong with it. maybe it's a bug running Chrome with Apple Script 🍎

[gaearon]

I think I got it working correctly by the last commit.
(Yea it makes no sense, got this combination by trial and error.)

Can you please test that it works for all cases?

[n3tr]

@gaearon tested, all passes!! 👍

[gaearon]

Thanks for fixing this!