logman

8.12

logman🔗ℹ

package: logman

logman is a package with small formatting additions to base logging. In particular, it specifies the message’s level and the time it was output. Note that it uses date-display-format for its time formatting, which is recommended to be set to 'iso-8601.

procedure
(log-debug message) → void?
message : any/c

procedure
(log-info message) → void?
message : any/c

procedure
(log-warning message) → void?
message : any/c

procedure
(log-error message) → void?
message : any/c

procedure
(log-fatal message) → void?
message : any/c

Example:

> (parameterize ([date-display-format 'iso-8601])
   (with-logging-to-port (current-output-port)
     (lambda ()
       (log-debug "debug information")
       (log-info "regular information")
       (log-warning "warnings")
       (log-error "errors")
       (log-fatal "fatal errors"))
     'debug))
[DEBUG] 2024-02-07T13:42:04 - debug information
[INFO ] 2024-02-07T13:42:04 - regular information
[WARN ] 2024-02-07T13:42:04 - warnings
[ERROR] 2024-02-07T13:42:04 - errors
[FATAL] 2024-02-07T13:42:04 - fatal errors