# A Lightweight, Modern and Flexible Logging Utility

## Documentation for package ‘logger’ version 0.4.2

- DESCRIPTION file
- User guides, package vignettes and other documentation
- Package NEWS
- Package README

## Help Pages

%except% | Try to evaluate an expressions and evaluate another expression on exception
appender_async | Delays executing the actual appender function to the future in a background process to avoid blocking the main R session
appender_console | Append log record to stderr
appender_file | Append log messages to a file
appender_kinesis | Send log messages to a Amazon Kinesis stream
appender_ntfy | Send log messages to ntfy
appender_pushbullet | Send log messages to Pushbullet
appender_slack | Send log messages to a Slack channel
appender_stderr | Append log record to stderr
appender_stdout | Append log record to stdout
appender_syslog | Send log messages to the POSIX system log
appender_syslognet | Send log messages to a network syslog server
appender_tee | Append log messages to a file and stdout as well
appender_telegram | Send log messages to a Telegram chat
appender_void | Dummy appender not delivering the log record to anywhere
as.loglevel | Convert R object into a logger log-level
colorize_by_log_level | Color string by the related log level
DEBUG | Log levels
delete_logger_index | Delete an index from a logger namespace
deparse_to_one_line | Deparse and join all lines into a single line
ERROR | Log levels
fail_on_missing_package | Check if R package can be loaded and fails loudly otherwise
FATAL | Log levels
formatter_cli | Apply 'cli::cli_text()' to format string with cli syntax
formatter_glue | Apply 'glue::glue()' to convert R objects into a character vector
formatter_glue_or_sprintf | Apply 'glue::glue()' and 'sprintf()'
formatter_glue_safe | Apply 'glue::glue_safe()' to convert R objects into a character vector
formatter_json | Transforms all passed R objects into a JSON list
formatter_logging | Mimic the default formatter used in the 'logging' package
formatter_pander | Formats R objects with pander
formatter_paste | Concatenate R objects into a character vector via 'paste'
formatter_sprintf | Apply 'sprintf()' to convert R objects into a character vector
get_logger_meta_variables | Collect useful information about the logging environment to be used in log messages
grayscale_by_log_level | Color string by the related log level
INFO | Log levels
layout_blank | Format a log record by including the raw message without anything added or modified
layout_gha | Format a log record for github actions
layout_glue | Format a log message with 'glue::glue()'
layout_glue_colors | Format a log message with 'glue::glue()' and ANSI escape codes to add colors
layout_glue_generator | Generate log layout function using common variables available via glue syntax
layout_json | Generate log layout function rendering JSON
layout_json_parser | Generate log layout function rendering JSON after merging meta fields with parsed list from JSON message
layout_logging | Format a log record as the logging package does by default
layout_simple | Format a log record by concatenating the log level, timestamp and message
layout_syslognet | Format a log record for syslognet
logger | Generate logging utility
log_appender | Get or set log record appender function
log_chunk_time | Automatically log execution time of knitr chunks
log_debug | Log a message with given log level
log_elapsed | Log cumulative running time
log_elapsed_start | Log cumulative running time
log_error | Log a message with given log level
log_errors | Injects a logger call to standard errors
log_eval | Evaluate an expression and log results
log_failure | Logs the error message to console before failing
log_fatal | Log a message with given log level
log_formatter | Get or set log message formatter
log_indices | Returns number of currently active indices
log_info | Log a message with given log level
log_layout | Get or set log record layout
log_level | Log a message with given log level
log_levels | Log levels
log_messages | Injects a logger call to standard messages
log_namespaces | Looks up logger namespaces
log_separator | Logs a long line to stand out from the console
log_shiny_input_changes | Auto logging input changes in Shiny app
log_success | Log a message with given log level
log_threshold | Get or set log level threshold
log_tictoc | Tic-toc logging
log_trace | Log a message with given log level
log_warn | Log a message with given log level
log_warnings | Injects a logger call to standard warnings
log_with_separator | Logs a message in a very visible way
OFF | Log levels
skip_formatter | Skip the formatter function
SUCCESS | Log levels
TRACE | Log levels
WARN | Log levels
with_log_threshold | Evaluate R expression with a temporarily updated log level threshold