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Tools to facilitate data.world's migration from Flow to TypeScript
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datadotworld/ts-migration
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These are a collection of tools that we used at Quizlet when migrating from Flow to TypeScript. We hope that you find these tools useful when doing your own migration, but keep in mind that they are made for the particularities of Quizlet's large codebase. You may need to modify these tools to suit your needs, but that said, they should be at the very least a good starting point.
The converter uses a fork ofbabel-plugin-flow-to-typescript along withRecast to preserve formatting. As it runs, it will rename files to.ts (or.tsx if it contains React), along with any snaps. In order to preserve the git history, this runs the conversion and commits the changes, and then renames all the files in a separate commit.
or add this indevDependencies:
"ts-migration": "git+https://github.com/datadotworld/ts-migration"and runnpm install.
- TypeScript is installed in your codebase, and you have a
tsconfig.jsonconfigured to suit your needs. - You use prettier, and you have a
.prettierrc.
Once installed, you can access the tools via the binary.
npx ts-migration convert-codebasenpx ts-migration convert-codebase --commitnpx ts-migration ignore-errors [--commit] [--includeJSX]The--includeJSX option can be extremely useful when you have a lot of errors you want to ignore, but will insert ignore comments in such a way that they can appear in the rendered HTML, so be sure to carefully review the output!
npx ts-migration strip-comments [--commit]ts-migration isMIT licensed.