fix: JDK version check wouldn't detect JDK 8 correctly #1395
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`envinfo` uses `javac -version` to work out the JDK version number. The doctor command was looking for a semver range of `>= 8` but this won't work for JDK 8 as it uses the old style numbering scheme (e.g. `1.8.x` not `8.x.x`). JDKs 9+ use the new version numbering scheme. Fixes react-native-community#1255
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grabbou
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Jul 6, 2021
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Summary:
envinfousesjavac -versionto work out the JDK version number. The doctor command was looking for a semver range of>= 8but this won't work for JDK 8 as it uses the old style numbering scheme (e.g.1.8.xnot8.x.x). JDKs 9+ use the new version numbering scheme.Fixes #1255
Test Plan:
On macOS, before applying this PR's changes:
brew install openjdk@8export JAVA_HOME=$(/usr/libexec/java_home -v 1.8)javac -versionoutputs something likejavac 1.8.0_282react-native doctorObserve doctor complains about the JDK version:
Apply changes and run
react-native doctoragain, observe 8 is now correctly detected as supported:Repeat the above steps with JDK 9+ to confirm they're still correctly detected.