[eprh] Remove hermes-parser #34719
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[eprh] Remove hermes-parser #34719
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We will be focusing eslint-plugin-react-hooks as the primary OSS-only package for our lint plugin. eslint-plugin-react-compiler will remain as a Meta only package as some limitations of our internal infra require us to use packages that aren't widely adopted by the rest of the industry. This PR removes `hermes-parser`, which was meant to support parsing Flow syntax.
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Comparing: 85c427d...4de48af Critical size changesIncludes critical production bundles, as well as any change greater than 2%:
Significant size changesIncludes any change greater than 0.2%: (No significant changes) |
josephsavona
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Oct 3, 2025
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We will be focusing eslint-plugin-react-hooks as the primary OSS-only package for our lint plugin. eslint-plugin-react-compiler will remain as a Meta only package as some limitations of our internal infra require us to use packages that aren't widely adopted by the rest of the industry. This PR removes `hermes-parser`, which was meant to support parsing Flow syntax. DiffTrain build for [71753ac](71753ac)
github-actions bot
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We will be focusing eslint-plugin-react-hooks as the primary OSS-only package for our lint plugin. eslint-plugin-react-compiler will remain as a Meta only package as some limitations of our internal infra require us to use packages that aren't widely adopted by the rest of the industry. This PR removes `hermes-parser`, which was meant to support parsing Flow syntax. DiffTrain build for [71753ac](71753ac)
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Hi, just to be sure, does this change have any ramifications for projects using Flow? |
poteto
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Oct 6, 2025
Adds back HermesParser to eslint-plugin-react-hooks. There are still [external users of Flow](#34719 (comment)) using the plugin, so we shouldn't break the plugin for them. However, we still have the problem of double parsing: once from eslint (which we discard) and then another via babel/hermes parser. In the long run we should investigate a translation layer from estree to babel (or alternatively, update the compiler to take estree as input). For now I am reverting that PR. This does mean that [Sandpack in react.dev](https://github.com/reactjs/react.dev/blob/11cb6b591571caf5fa2a192117b6a6445c3f2027/src/components/MDX/Sandpack/runESLint.tsx#L31) cannot update to the latest eprh as HermesParser does not appear to be able to be run in a browser. I discovered this while trying to update eprh on react.dev last week, but didn't investigate deeply. I'll need to double check that again to find out more.
poteto
added a commit
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Oct 6, 2025
Adds back HermesParser to eslint-plugin-react-hooks. There are still [external users of Flow](#34719 (comment)) using the plugin, so we shouldn't break the plugin for them. However, we still have the problem of double parsing: once from eslint (which we discard) and then another via babel/hermes parser. In the long run we should investigate a translation layer from estree to babel (or alternatively, update the compiler to take estree as input). But for now, I am reverting the PR. This does mean that [Sandpack in react.dev](https://github.com/reactjs/react.dev/blob/11cb6b591571caf5fa2a192117b6a6445c3f2027/src/components/MDX/Sandpack/runESLint.tsx#L31) cannot update to the latest eprh as HermesParser does not appear to be able to be run in a browser. I discovered this while trying to update eprh on react.dev last week, but didn't investigate deeply. I'll need to double check that again to find out more.
github-actions bot
pushed a commit
that referenced
this pull request
Oct 6, 2025
Adds back HermesParser to eslint-plugin-react-hooks. There are still [external users of Flow](#34719 (comment)) using the plugin, so we shouldn't break the plugin for them. However, we still have the problem of double parsing: once from eslint (which we discard) and then another via babel/hermes parser. In the long run we should investigate a translation layer from estree to babel (or alternatively, update the compiler to take estree as input). But for now, I am reverting the PR. This does mean that [Sandpack in react.dev](https://github.com/reactjs/react.dev/blob/11cb6b591571caf5fa2a192117b6a6445c3f2027/src/components/MDX/Sandpack/runESLint.tsx#L31) cannot update to the latest eprh as HermesParser does not appear to be able to be run in a browser. I discovered this while trying to update eprh on react.dev last week, but didn't investigate deeply. I'll need to double check that again to find out more. DiffTrain build for [b65e6fc](b65e6fc)
github-actions bot
pushed a commit
that referenced
this pull request
Oct 6, 2025
Adds back HermesParser to eslint-plugin-react-hooks. There are still [external users of Flow](#34719 (comment)) using the plugin, so we shouldn't break the plugin for them. However, we still have the problem of double parsing: once from eslint (which we discard) and then another via babel/hermes parser. In the long run we should investigate a translation layer from estree to babel (or alternatively, update the compiler to take estree as input). But for now, I am reverting the PR. This does mean that [Sandpack in react.dev](https://github.com/reactjs/react.dev/blob/11cb6b591571caf5fa2a192117b6a6445c3f2027/src/components/MDX/Sandpack/runESLint.tsx#L31) cannot update to the latest eprh as HermesParser does not appear to be able to be run in a browser. I discovered this while trying to update eprh on react.dev last week, but didn't investigate deeply. I'll need to double check that again to find out more. DiffTrain build for [b65e6fc](b65e6fc)
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We will be focusing eslint-plugin-react-hooks as the primary OSS-only package for our lint plugin. eslint-plugin-react-compiler will remain as a Meta only package as some limitations of our internal infra require us to use packages that aren't widely adopted by the rest of the industry.
This PR removes
hermes-parser, which was meant to support parsing Flow syntax.