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logger (development version)

New features

• logo 😻 (#196, @hadley)
• computing metadata lazily, so various expensive computations are only performed if you actually add them to the log (#105, @hadley)
• log_appender(), log_layout() and log_formatter() now check that you are calling them with a function, and return the previously set value (#170, @hadley)
• new function to return number of log indices (#194, @WurmPeter)
• appender_async is now using mirai instead of a custom background process and queue system (#214, @hadley @shikokuchuo)

Fixes

• eval scoping and lazy eval (#178, @hadley)

Housekeeping

• update pkgdown site to Bootstrap 5 and related revamp, e.g. reference index and run/show examples (#159 #165 #193, @hadley)
• roxygen updated to use markdown, general cleanup (#160 #161 #191 #201, @hadley)
• testing improvements, e.g. move to testthat v3 and snapshots, syntactic sugar (#163 #167 #168 #169 #171 #192, @hadley)
• README tweaks (#162 #176, @hadley)
• modernize GitHub Actions (#171, @hadley)
• drop support for R versions below 4.0.0 (#177, @hadley)
• internal function tweaks (#181 #187 #197, @hadley)
• restyle sources (#185 #186 #191 #199, @daroczig and @hadley)

logger 0.3.0 (2024-03-03)

Many unrelated small features, fixes and documentation updates collected over 2+ years.

New features

• update log_* functions to invisibly return the formatted log message and record (#26, @r2evans)
• add namespace argument to log_shiny_input_changes (#93, @kpagacz)
• optionally suppress messages in globalCallingHandlers after being logged (#100, @DanChaltiel)
• as.loglevel helper to convert string/number to loglevel (requested by @tentacles-from-outer-space)
• new formatter function: formatter_glue_safe (#126, @terashim)
• support OFF log level (#138, @pawelru)
• override default INFO log level via env var (#145, requested by sellorm)

Fixes

• handle zero-length messages in formatter_glue_or_sprintf (#74, @deeenes)
• generalize log_separator to work with all layout functions (#96, @Polkas)
• support log levels in log_shiny_input_changes (#103, @taekeharkema)
• fix fn name lookup/reference with nested calls (#120, reported by @averissimo)
• force the file argument of appender_tee (#124, reported by @dbontemps)
• don’t allow stacking logger hooks on messages/warnings/errors (reported by @jkeuskamp)
• improve fragile test case when Hmisc loaded (#131, @r2evans)
• pass index, namespace etc from log_ functions down to log_level (#143, @MichaelChirico)
• refer to the caller function in global message logger hooks (#146, reported by @gabesolomon10)

logger 0.2.2 (2021-10-10)

Maintenance release:

• fix unbalanced code chunk delimiters in vignette (yihui/knitr#2057)

logger 0.2.1 (2021-07-06)

Maintenance release:

• update appender_slack to use slackr_msg instead of text_slackr

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)

logger 0.1 (2018-12-20)

Initial CRAN release after collecting feedback for a month on Twitter at https://twitter.com/daroczig/status/1067461632677330944:

• finalized design of a log request defined by

  • a log level threshold,
  • a formatter function preparing the log message,
  • a layout function rendering the actual log records and
  • an appender function delivering to the log destination

• detailed documentation with 7 vignettes and a lot of examples, even some benchmarks

• ~75% code coverage for unit tests

• 5 formatter functions mostly using paste, sprintf and glue

• 6 layout functions with convenient wrappers to let users define custom layouts via glue or JSON, including colorized output

• 5 appender functions delivering log records to the console, files, Pushbullet and Slack

• helper function to evaluate an expressions with auto-logging both the expression and its result

• helper function to temporarily update the log level threshold

• helper function to skip running the formatter function on a log message

• mostly backward compatibly with the logging and futile.logger packages

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.