v1.0.0-rc.2

This is the second release candidate for zap's stable release. It includes two breaking changes.

Breaking changes:

• #316: Zap's global loggers are now fully concurrency-safe (previously, users had to ensure that ReplaceGlobals was called before the loggers were in use). However, they must now be accessed via the L() and S() functions. Users can update their projects with

  gofmt -r "zap.L -> zap.L()" -w .
  gofmt -r "zap.S -> zap.S()" -w .
  

• #309 and #317: RC1 was mistakenly shipped with invalid JSON and YAML struct tags on all config structs. This release fixes the tags and adds static analysis to prevent similar bugs in the future.

Bugfixes:

• #321: Redirecting the standard library's log output now correctly reports the logger's caller.

Enhancements:

• #325 and #333: Zap now transparently supports non-standard, rich errors like those produced by github.com/pkg/errors.
• #326: Though New(nil) continues to return a no-op logger, NewNop() is now preferred. Users can update their projects with gofmt -r 'zap.New(nil) -> zap.NewNop()' -w ..
• #300: Incorrectly importing zap as github.com/uber-go/zap now returns a more informative error.

Thanks to @skipor and @chapsuk for their contributions to this release.