0.5.0-rc.1

Key changes

• Support for using custom environment variables to parse the log level filter
• Added colors and an RFC3339-formatted timestamp to the default format
• Buffer log output so logs over multiple lines won't end up interleaved in multi-threaded applications
• Move the filter parsing into its own module so it's easier to consume in custom loggers
• Documentation!

Breaking changes

• LogTarget has been renamed to Target
• LogBuilder has been renamed to Builder
• The Builder::format method now accepts a F: Fn(&mut Formatter, &Record) -> Result<()> + Sync + Send. This is the new formatting API that writes into a Formatter instead of producing an owned String
• Builder::init will panic if the logger can't be initialised. A new Builder::try_init method has been added with the same semantics as the old Builder::init method

Contributions

• @KodrAus Make the timestamp format more compact
• @mjkillough Allow custom timestamp formats.
• @KodrAus Add rfc3339 timestamps to default format
• @KodrAus Support colors and buffer writes
• @KodrAus Make filtering public
• @FuGangqiang fix doc and reformat code style
• @KodrAus Add examples for custom format and logger impls
• @sfackler Fix std feature name
• @jimmycuadra Adds a new constructor and init functions for custom env vars.
• @jimmycuadra Update to the latest commit of log / deny debug impls, missing docs, and warnings.
• @jethrogb Enable use of Logger as a filter

Thanks to everybody who helped make this release of env_logger happen!

New dependencies

• chrono for the timestamp
• termcolor for record buffering and colors