https://github.com/MarcoPolo/flowToTs

Flow to Typescript codemod
https://github.com/MarcoPolo/flowToTs

codemod flowtype typescript

Last synced: 11 days ago
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Flow to Typescript codemod

• Host: GitHub
• URL: https://github.com/MarcoPolo/flowToTs
• Owner: MarcoPolo
• Created: 2019-03-09T15:28:28.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2019-10-29T13:34:47.000Z (over 4 years ago)
• Last Synced: 2024-05-22T19:20:42.795Z (24 days ago)
• Topics: codemod, flowtype, typescript
• Language: TypeScript
• Size: 305 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md

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• awesome-codemods - flowToTs - Flow to Typescript codemods. (Typescript)

README

        
# DEPRECATED Check out: Khan Academy's Flow To Ts tool: https://github.com/khan/flow-to-ts

# Intro

Converts flow files to ts using jscodeshift. It isn't perfect, but should get you pretty close. There are a couple of fundamental differences that have to be manually converted.

# Usage

```

$ npx flow-to-ts -o ts /path/to/flow/files # Will convert .js files into .ts files

```

If you're going to be using this tool a couple of times, it's probably best not to use `npx` since it will reinstall everything [everytime](https://github.com/zkat/npx/issues/113) you run it.

instead use `npm install -g flow-to-ts`

## Advanced Usage

### .js files with jsx

```

$ npx flow-to-ts -o tsx /path/to/flow/files # Will convert .js files into .tsx files

```

### .jsx files

```

$ npx flow-to-ts -o tsx /path/to/flow/files # Will convert .jsx files into .tsx files

```

### .js.flow files

```

$ npx flow-to-ts -o d.ts /path/to/flow/files # Will convert .js.flow files into .d.ts files

```

### Dry Mode and passing arguments to jscodeshift

Everything after -- will be forwarded to jscodeshift cli

```

$ npx flow-to-ts -o ts /path/to/flow/files -- --dry # Won't change code

```

## Fundamental Differences

### .js.flow vs .d.ts

In flow, definition files (.js.flow) are looked at with higher precedence over .js files. The reverse is true for typescript.

This is a problem if you do something like: "import {type Foo} from 'foo'" and there exists `foo.js` and `foo.js.flow`. You'll have to manually restructure your code.