RFR: 8289689: (fs) Re-examine the need for normalization to Unicode Normalization Format D (macOS)

[Alan Bateman]

On Thu, 27 Oct 2022 15:50:56 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> On macOS, perform file name normalization if and only if a specific system property is set.

src/java.base/macosx/classes/sun/nio/fs/MacOSXFileSystem.java line 42:

> 40: 
> 41:     private static final boolean ENCODE_FILE_NAMES =
> 42:         Boolean.getBoolean(PROPERTY_ENABLE_FILE_NAME_ENCODING);

APFS is the default since macOS 10.13 but I agree, it's safer to have a system property for a few releases in case anything is relying on this.

I assume you'll need to use GetPropertyAction.privilegedGetProperty so that it works when there is a security manager set.

As regards the property name then it will need to be jdk.something because it's JDK specific rather than a standard property. Maybe something like -Djdk.nio.path.useNormalizationFormD ?

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PR: https://git.openjdk.org/jdk/pull/10885