Struct LogfmtBuilder

pub struct LogfmtBuilder<W: Write> { /* private fields */ }

A constructor for a Logfmt drain.

Implementations

impl<W: Write> LogfmtBuilder<W>

pub fn build(self) -> Logfmt<W>

Constructs the drain.

pub fn set_prefix( self, prefix: fn(&mut dyn Write, &Record<'_>) -> Result, ) -> Self

Set a function that prints a (not necessarily logfmt-formatted) prefix to the output stream.

pub fn no_prefix(self) -> Self

Sets the logger up to print no prefix, effectively starting the line entirely logfmt field-formatted.

pub fn redact(self, redact: fn(&Key) -> Redaction) -> Self

Sets a function that makes decisions on whether to log a field.

This function must return a Redaction result, which has two variants at the moment: Redact::Skip to not log the field, and Redact::Plain to log the field value in plain text.

pub fn print_msg(self, print: bool) -> Self

Choose whether to print the log message.

The default prefix already prints it, so the default is to skip.

pub fn print_level(self, print: bool) -> Self

Choose whether to print the log level.

The default prefix already prints it, so the default is to skip.

pub fn print_tag(self, print: bool) -> Self

Choose whether to print the log level.

The default prefix already prints it, so the default is to skip.

pub fn force_quotes(self) -> Self

Force quoting field values even if they don’t contain quotable characters.

Setting this option will surround values with quotes like foo="bar".