fix(watchman): Fix watchman checks on Windows#5553
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@@ Coverage Diff @@
## master #5553 +/- ##
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- Coverage 61.71% 61.7% -0.01%
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Files 213 213
Lines 7149 7150 +1
Branches 3 3
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Hits 4412 4412
- Misses 2736 2737 +1
Partials 1 1
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Awesome, thank you so much for fixing this! |
jessecarfb
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Feb 14, 2018
BYK
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Feb 19, 2018
…sues **Summary** Watchman crawler was ignoring the `relative_path` field in the response of a `watch-project` call, requiring it to match watch roots with the actual project roots afterwards. Not only this was inefficient, it was also faulty due to the naive `.startsWith()` check in `isDescendant()`. This was causing issues both with Windows file paths (#5553) and after that with case-insensitive file systems where the names from Watchman did not match the casing of the passed roots. This patch replaces all that logic by taking the `relative_path` field into account and does some consolidation along with using `async`/`await` instead of promises. **Test plan** Run the updated test suite on all platforms and make sure it passes. I've also verified this on some internal Windows repos by manually patching the built module and making sure there are no warnings regarding duplicated haste names due to incorrect crawling of project root siblings.
BYK
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Feb 19, 2018
…5615) **Summary** Watchman crawler was ignoring the `relative_path` field in the response of a `watch-project` call, requiring it to match watch roots with the actual project roots afterward. Not only this was inefficient, it was also faulty due to the naive `.startsWith()` check in `isDescendant()`. This was causing issues both with Windows file paths (#5553) and after that with case-insensitive file systems where the names from Watchman did not match the casing of the passed roots. This patch replaces all that logic by taking the `relative_path` field into account and does some consolidation along with using `async`/`await` instead of promises. **Test plan** Run the updated test suite on all platforms and make sure it passes. I've also verified this on some internal Windows repos by manually patching the built module and making sure there are no warnings regarding duplicated haste names due to incorrect crawling of project root siblings.
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Summary
This patch fixes a long-standing issue with the watchman crawler. Watchman always returns POSIX-style paths with forward-slashes in it and Jest uses the "raw"
rootsarray which has Windows-style paths in it. This makes the fast but naiveisDescendantcheck that simply does a.startsWithcheck and causes failures in listening folders or checks.Test plan
Run the test suite on Windows. If you keep the updated tests and undo the changes in the
watchmancrawler, the tests fail on Windows. With the fix in place, tests pass.