slog v2

Status

Slog v2 is striving to be usable and in good shape now. API breaking changes between 2.0.0-x versions are possible, but if you use ~ operator you should not have to deal with unexpected breakage.

Latest set of ported core crates

# all core improvements and ideas implemented; hopefully no more breaking changes coming;
slog = "2.0.0-2.0"
slog-async = "2.0.0-2.0"
slog-scope = "2.0.0-2.0"
slog-json = "2.0.0-2.0"
slog-bunyan = "2.0.0-1.0"
# some breaking changes still possible
slog-term = "2.0.0-2.0"
slog-stdlog = "2.0.0-0.2"
slog-envlogger = "2.0.0-1.0"

Using slog v2 and versioning

Slog v2 will is being developed in the 0.x.y model, that was used to release 1.0.0. slog 2.0.0-1.0 should be treated as 0.1.0 version was, just working toward 2.0.0 release.

It's recommended to use the following to specify the dependency on pre-release versions of crates ported to slog. eg.

slog = ~2.0.0-1"

Changes overview

Core crate:

• Refactored key-value pairs traits and structures
• Renamed some types
• Support chaining of OwnedKVLists
• Added associated Ok type to Drain
• Refactored Record to optimize performance on async operations
• Minimal rustc version required: 1.15.0
• DrainExt has been removed and utility methods moved directly to Drain

Other crates

• slog-extra has been renamed to slog-async since that's the only functionality it contained.
• slog-stream is obsoleted and won't be used in slog v2 at all. It was a wrong abstraction. Decorators functionality will be moved directly to slog-term.
• slog-term will provide open io traits to allow multiple terminal / file writing backends.