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Author SHA1 Message Date
Sébastien Deleuze 22a750f378 Replace build-time initialization by constant fields
This commit leverages a subset of @philwebb initial experimentation
to compute at build time the value of specific boolean static fields
in native images. This enhancement is implemented for now as a
GraalVM feature.

The goal here is to keep an optimized footprint via build time code
removal without leveraging build-time class initialization which is known
for the blocking compatibility issues it introduces due to its viral nature.

For now, the static fields initialized at build time with native are:
 - NativeDetector#imageCode
 - Fields with a name ending by "Present" in "org.springframework" package
   typically used for classpath check with ClassUtils#isPresent

Closes gh-28624
2022-06-24 13:54:20 +02:00