logger 0.2.0 (2021-03-03)

Breaking changes

• appender_console writes to stderr by default instead of stdout (#28)

Fixes

• default date format in glue layouts (#44, @burgikukac)
• fn reference in loggers will not to a Cartesian join on the log lines and message, but merge (and clean up) the fn even for large anonymous functions (#20)

New features

• allow defining the log level threshold as a string (#13, @artemklevtsov)
• allow updating the log level threshold, formatter, layout and appender in all namespaces with a single call (#50)
• new argument to appender_file to optionally truncate before appending (#24, @eddelbuettel)
• new arguments to appender_file to optionally rotate the log files after appending (#42)
• new meta variables for logging in custom layouts: R version and calling package's version
• improved performance by not evaluating arguments when the log record does not meet the log level threshold (#27, @jozefhajnala)
• logger in now part of the Mikata Project: https://mikata.dev

New helper functions

• %except%: evaluate an expression with fallback
• log_separator: logging with separator lines (#16)
• log_tictoc: tic-toc logging (#16, @nfultz)
• log_failure: log error before failing (#19, @amy17519)
• log_messages, log_warnings, log_errors: optionally auto-log messages, warnings and errors using globalCallingHandlers on R 4.0.0 and above, and injecting logger calls to message, warnings and stop below R 4.0.0
• log_shiny_input_changes: auto-log input changes in Shiny apps (#25)

New formatter functions

• layout_pander: transform R objects into markdown before logging (#22)

New layout functions

• layout_blank: blank log messages without any modification
• layout_json_parser: render the layout as a JSON blob after merging with requested meta fields

New appender functions

• appender_telegram: deliver log records to Telegram (#14, @artemklevtsov)
• appender_syslog: deliver log records to syslog (#30, @atheriel)
• appender_kinesis: deliver log records to Amazon Kinesis (#35)
• appender_async: wrapper function for other appender functions to deliver log records in a background process asynchronously without blocking the master process (#35)