Create def script for easier lib def creation

[Brianzchen]

Create a handy script inspired from #4042 that will create a basic structure for new type def configured to an appropriate lowest supported version as recommended in contribution guide.

Comes built with a lib def file plus a test file with base structure

Usage: ./create_def.sh lib-name 1.x.x

Skeleton File/Folder Structure

sample when running ./create_def.sh test 1.x.x

Script Error Handling

[Brianzchen]

@FezVrasta not exactly what you were asking for but what do you think? Should remove a lot of small mistakes with repetition when creating a new lib def

[gantoine]

Could/should this be a command instead of a bash file? That way we can add it to the docs and help menu.

[Brianzchen]

Could/should this be a command instead of a bash file? That way we can add it to the docs and help menu.

Sorry @gantoine what do you mean? Do you want this to be a node command that lives in cli/package.json and then is exposed via a bash script as opposed to being a bash script itself? I was basically copying the way ./quick_run_def_tests.sh gets used.

[gantoine]

Yeah exactly! In the same way you'd run flow-typed create-stub lib-name, you could run flow-typed create-def lib-name 1.x.x. Then we could add it to the help menu and the wiki here on Github.

[Brianzchen]

@gantoine Made a change, let me know if it's what you're looking for. Learnt more about the cli so that was good experience :)

[AndrewSouthpaw]

Looks great. @Brianzchen looks like maybe you didn't push the latest changes turning it into a CLI command?