build: vscode improvements and devcontainer support #15395
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Add devcontainer.json to support one-click development environment. It installs java 25, runs `gradlew eclipse`, and installs the correct extensions. No popups or confirmations required. Only GitHub codespaces has been tested. Set "Standard" launch mode, the "Lightweight" mode initially started by the default "Hybrid" setup will spew nonsensical diagnostic errors. This is very confusing as it makes the setup appear broken, for a potentially long time, until the "Standard" server is finished indexing (takes ~5mins on my machine). Improve the completion speed, by reducing the amount of auto-imported stuff (favorite static members). Enable inlay hints for inferred variable types (`var` keyword), and inferred parameter types (lambdas). Remove telemetry popup for Red Hat Language Server. Local VSCode user must still deal with 3 popups. but 3 is better than 4. Remove @SuppressForbidden from WrapperDownloader which breaks javac when the wrapper is used. This file will need to be excluded via some other mechanism. Fix outdated 'java 23' in gradlew error code.
dweiss
approved these changes
Nov 3, 2025
build-tools/build-infra/src/main/java/org/apache/lucene/gradle/WrapperDownloader.java
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Not sure why this failed, not sure either how it works :)
dweiss
approved these changes
Nov 3, 2025
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Thanks for the assist @dweiss! The same caveats around the vscode setup also exist here:
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Add devcontainer.json to support one-click development environment. It installs java 25, runs
gradlew eclipse, and installs the correct extensions. No popups or confirmations required. Only GitHub codespaces has been tested.Set "Standard" launch mode, the "Lightweight" mode initially started by the default "Hybrid" setup will spew nonsensical diagnostic errors. This is very confusing as it makes the setup appear broken, for a potentially long time, until the "Standard" server is finished indexing (takes ~5mins on my machine).
Improve the completion speed, by reducing the amount of auto-imported stuff (favorite static members).
Enable inlay hints for inferred variable types (
varkeyword), and inferred parameter types (lambdas).Remove telemetry popup for Red Hat Language Server. Local VSCode user must still deal with 3 popups. but 3 is better than 4.
Remove ast-grep extension which errors-out if the binary isn't installed locally. User can install themselves if wanted.
Fix outdated 'java 23' in gradlew error code.