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## Summary Problem #1: Running the `link-compiler.sh` bash script via `"prebuild"` script fails if a developer has cloned the `react` repo into a folder that contains _any_ spaces. 3 tests fail because of this. <img width="1003" alt="fail-1" src="https://github.com/user-attachments/assets/1fbfa9ce-4f84-48d7-b49c-b6e967b8c7ca" /> <img width="1011" alt="fail-2" src="https://github.com/user-attachments/assets/0a8c6371-a2df-4276-af98-38f4784cf0da" /> <img width="1027" alt="fail-3" src="https://github.com/user-attachments/assets/1c4f4429-800c-4b44-b3da-a59ac85a16b9" /> For example, my current folder is: `/Users/wes/Development/Open Source Contributions/react` The link compiler error returns: `./scripts/react-compiler/link-compiler.sh: line 15: cd: /Users/wes/Development/Open: No such file or directory` Problem #2: 1 test in `ReactChildren-test.js` fails due the existing stack trace regex which should be lightly revised. `([^(\[\n]+)[^\n]*/g` is more robust for stack traces: it captures the function/class name (with dots) and does not break on spaces in file paths. `([\S]+)[^\n]*/g` is simpler but breaks if there are spaces and doesn't handle dotted names well. Additionally, we trim the whitespace off the name to resolve extra spaces breaking this test as well: ``` - in div (at **) + in div (at **) ``` <img width="987" alt="fail-4" src="https://github.com/user-attachments/assets/56a673bc-513f-4458-95b2-224129c77144" /> All of the above tests pass if I hyphenate my local folder: `/Users/wes/Development/Open-Source-Contributions/react` I selfishly want to keep spaces in my folder names. 🫣 ## How did you test this change? **npx yarn prebuild** Before: <img width="896" alt="Screenshot at Jun 01 11-42-56" src="https://github.com/user-attachments/assets/4692775c-1e5c-4851-9bd7-e12ed5455e47" /> After: <img width="420" alt="Screenshot at Jun 01 11-43-42" src="https://github.com/user-attachments/assets/4e303c00-02b7-4540-ba19-927b2d7034fb" /> **npx yarn test** **npx yarn test ./packages/react/src/\_\_tests\_\_/ReactChildren-test.js** **npx yarn test -r=xplat --env=development --variant=true --ci --shard=3/5** Before: <img width="438" alt="before" src="https://github.com/user-attachments/assets/f5eedb22-18c3-4124-a04b-daa95c0f7652" /> After: <img width="439" alt="after" src="https://github.com/user-attachments/assets/a94218ba-7c6a-4f08-85d3-57540e9d0029" /> <img width="650" alt="Screenshot at Jun 02 18-03-39" src="https://github.com/user-attachments/assets/3eae993c-a56b-46c8-ae02-d249cb053fe7" /> <img width="685" alt="Screenshot at Jun 03 12-53-47" src="https://github.com/user-attachments/assets/5b2caa33-d3dc-4804-981d-52cb10b6226f" /> |
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React Compiler
React Compiler is a compiler that optimizes React applications, ensuring that only the minimal parts of components and hooks will re-render when state changes. The compiler also validates that components and hooks follow the Rules of React.
More information about the design and architecture of the compiler are covered in the Design Goals.
More information about developing the compiler itself is covered in the Development Guide.