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use super::*;
use crate::{
field::{VisitFmt, VisitOutput},
fmt::fmt_layer::{FmtContext, FormattedFields},
registry::LookupSpan,
};
use std::fmt;
use tracing_core::{
field::{self, Field},
Event, Level, Subscriber,
};
#[cfg(feature = "tracing-log")]
use tracing_log::NormalizeEvent;
use nu_ansi_term::{Color, Style};
/// An excessively pretty, human-readable event formatter.
///
/// Unlike the [`Full`], [`Compact`], and [`Json`] formatters, this is a
/// multi-line output format. Each individual event may output multiple lines of
/// text.
///
/// # Example Output
///
/// <pre><font color="#4E9A06"><b>:;</b></font> <font color="#4E9A06">cargo</font> run --example fmt-pretty
/// <font color="#4E9A06"><b> Finished</b></font> dev [unoptimized + debuginfo] target(s) in 0.08s
/// <font color="#4E9A06"><b> Running</b></font> `target/debug/examples/fmt-pretty`
/// 2022-02-15T18:44:24.535324Z <font color="#4E9A06"> INFO</font> <font color="#4E9A06"><b>fmt_pretty</b></font><font color="#4E9A06">: preparing to shave yaks, </font><font color="#4E9A06"><b>number_of_yaks</b></font><font color="#4E9A06">: 3</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt-pretty.rs:16 <font color="#AAAAAA"><i>on</i></font> main
///
/// 2022-02-15T18:44:24.535403Z <font color="#4E9A06"> INFO</font> <font color="#4E9A06"><b>fmt_pretty::yak_shave</b></font><font color="#4E9A06">: shaving yaks</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:41 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535442Z <font color="#75507B">TRACE</font> <font color="#75507B"><b>fmt_pretty::yak_shave</b></font><font color="#75507B">: hello! I'm gonna shave a yak, </font><font color="#75507B"><b>excitement</b></font><font color="#75507B">: "yay!"</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:16 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shave</b> <font color="#AAAAAA"><i>with</i></font> <b>yak</b>: 1
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535469Z <font color="#75507B">TRACE</font> <font color="#75507B"><b>fmt_pretty::yak_shave</b></font><font color="#75507B">: yak shaved successfully</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:25 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shave</b> <font color="#AAAAAA"><i>with</i></font> <b>yak</b>: 1
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535502Z <font color="#3465A4">DEBUG</font> <font color="#3465A4"><b>yak_events</b></font><font color="#3465A4">: </font><font color="#3465A4"><b>yak</b></font><font color="#3465A4">: 1, </font><font color="#3465A4"><b>shaved</b></font><font color="#3465A4">: true</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:46 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535524Z <font color="#75507B">TRACE</font> <font color="#75507B"><b>fmt_pretty::yak_shave</b></font><font color="#75507B">: </font><font color="#75507B"><b>yaks_shaved</b></font><font color="#75507B">: 1</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:55 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535551Z <font color="#75507B">TRACE</font> <font color="#75507B"><b>fmt_pretty::yak_shave</b></font><font color="#75507B">: hello! I'm gonna shave a yak, </font><font color="#75507B"><b>excitement</b></font><font color="#75507B">: "yay!"</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:16 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shave</b> <font color="#AAAAAA"><i>with</i></font> <b>yak</b>: 2
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535573Z <font color="#75507B">TRACE</font> <font color="#75507B"><b>fmt_pretty::yak_shave</b></font><font color="#75507B">: yak shaved successfully</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:25 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shave</b> <font color="#AAAAAA"><i>with</i></font> <b>yak</b>: 2
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535600Z <font color="#3465A4">DEBUG</font> <font color="#3465A4"><b>yak_events</b></font><font color="#3465A4">: </font><font color="#3465A4"><b>yak</b></font><font color="#3465A4">: 2, </font><font color="#3465A4"><b>shaved</b></font><font color="#3465A4">: true</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:46 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535618Z <font color="#75507B">TRACE</font> <font color="#75507B"><b>fmt_pretty::yak_shave</b></font><font color="#75507B">: </font><font color="#75507B"><b>yaks_shaved</b></font><font color="#75507B">: 2</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:55 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535644Z <font color="#75507B">TRACE</font> <font color="#75507B"><b>fmt_pretty::yak_shave</b></font><font color="#75507B">: hello! I'm gonna shave a yak, </font><font color="#75507B"><b>excitement</b></font><font color="#75507B">: "yay!"</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:16 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shave</b> <font color="#AAAAAA"><i>with</i></font> <b>yak</b>: 3
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535670Z <font color="#C4A000"> WARN</font> <font color="#C4A000"><b>fmt_pretty::yak_shave</b></font><font color="#C4A000">: could not locate yak</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:18 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shave</b> <font color="#AAAAAA"><i>with</i></font> <b>yak</b>: 3
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535698Z <font color="#3465A4">DEBUG</font> <font color="#3465A4"><b>yak_events</b></font><font color="#3465A4">: </font><font color="#3465A4"><b>yak</b></font><font color="#3465A4">: 3, </font><font color="#3465A4"><b>shaved</b></font><font color="#3465A4">: false</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:46 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535720Z <font color="#CC0000">ERROR</font> <font color="#CC0000"><b>fmt_pretty::yak_shave</b></font><font color="#CC0000">: failed to shave yak, </font><font color="#CC0000"><b>yak</b></font><font color="#CC0000">: 3, </font><font color="#CC0000"><b>error</b></font><font color="#CC0000">: missing yak, </font><font color="#CC0000"><b>error.sources</b></font><font color="#CC0000">: [out of space, out of cash]</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:51 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535742Z <font color="#75507B">TRACE</font> <font color="#75507B"><b>fmt_pretty::yak_shave</b></font><font color="#75507B">: </font><font color="#75507B"><b>yaks_shaved</b></font><font color="#75507B">: 2</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt/yak_shave.rs:55 <font color="#AAAAAA"><i>on</i></font> main
/// <font color="#AAAAAA"><i>in</i></font> fmt_pretty::yak_shave::<b>shaving_yaks</b> <font color="#AAAAAA"><i>with</i></font> <b>yaks</b>: 3
///
/// 2022-02-15T18:44:24.535765Z <font color="#4E9A06"> INFO</font> <font color="#4E9A06"><b>fmt_pretty</b></font><font color="#4E9A06">: yak shaving completed, </font><font color="#4E9A06"><b>all_yaks_shaved</b></font><font color="#4E9A06">: false</font>
/// <font color="#AAAAAA"><i>at</i></font> examples/examples/fmt-pretty.rs:19 <font color="#AAAAAA"><i>on</i></font> main
/// </pre>
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct Pretty {
display_location: bool,
}
/// The [visitor] produced by [`Pretty`]'s [`MakeVisitor`] implementation.
///
/// [visitor]: field::Visit
/// [`MakeVisitor`]: crate::field::MakeVisitor
#[derive(Debug)]
pub struct PrettyVisitor<'a> {
writer: Writer<'a>,
is_empty: bool,
style: Style,
result: fmt::Result,
}
/// An excessively pretty, human-readable [`MakeVisitor`] implementation.
///
/// [`MakeVisitor`]: crate::field::MakeVisitor
#[derive(Debug)]
pub struct PrettyFields {
/// A value to override the provided `Writer`'s ANSI formatting
/// configuration.
///
/// If this is `Some`, we override the `Writer`'s ANSI setting. This is
/// necessary in order to continue supporting the deprecated
/// `PrettyFields::with_ansi` method. If it is `None`, we don't override the
/// ANSI formatting configuration (because the deprecated method was not
/// called).
// TODO: when `PrettyFields::with_ansi` is removed, we can get rid
// of this entirely.
ansi: Option<bool>,
}
// === impl Pretty ===
impl Default for Pretty {
fn default() -> Self {
Self {
display_location: true,
}
}
}
impl Pretty {
fn style_for(level: &Level) -> Style {
match *level {
Level::TRACE => Style::new().fg(Color::Purple),
Level::DEBUG => Style::new().fg(Color::Blue),
Level::INFO => Style::new().fg(Color::Green),
Level::WARN => Style::new().fg(Color::Yellow),
Level::ERROR => Style::new().fg(Color::Red),
}
}
/// Sets whether the event's source code location is displayed.
///
/// This defaults to `true`.
#[deprecated(
since = "0.3.6",
note = "all formatters now support configurable source locations. Use `Format::with_source_location` instead."
)]
pub fn with_source_location(self, display_location: bool) -> Self {
Self {
display_location,
..self
}
}
}
impl<C, N, T> FormatEvent<C, N> for Format<Pretty, T>
where
C: Subscriber + for<'a> LookupSpan<'a>,
N: for<'a> FormatFields<'a> + 'static,
T: FormatTime,
{
fn format_event(
&self,
ctx: &FmtContext<'_, C, N>,
mut writer: Writer<'_>,
event: &Event<'_>,
) -> fmt::Result {
#[cfg(feature = "tracing-log")]
let normalized_meta = event.normalized_metadata();
#[cfg(feature = "tracing-log")]
let meta = normalized_meta.as_ref().unwrap_or_else(|| event.metadata());
#[cfg(not(feature = "tracing-log"))]
let meta = event.metadata();
write!(&mut writer, " ")?;
// if the `Format` struct *also* has an ANSI color configuration,
// override the writer...the API for configuring ANSI color codes on the
// `Format` struct is deprecated, but we still need to honor those
// configurations.
if let Some(ansi) = self.ansi {
writer = writer.with_ansi(ansi);
}
self.format_timestamp(&mut writer)?;
let style = if self.display_level && writer.has_ansi_escapes() {
Pretty::style_for(meta.level())
} else {
Style::new()
};
if self.display_level {
write!(
writer,
"{} ",
super::FmtLevel::new(meta.level(), writer.has_ansi_escapes())
)?;
}
if self.display_target {
let target_style = if writer.has_ansi_escapes() {
style.bold()
} else {
style
};
write!(
writer,
"{}{}{}:",
target_style.prefix(),
meta.target(),
target_style.infix(style)
)?;
}
let line_number = if self.display_line_number {
meta.line()
} else {
None
};
// If the file name is disabled, format the line number right after the
// target. Otherwise, if we also display the file, it'll go on a
// separate line.
if let (Some(line_number), false, true) = (
line_number,
self.display_filename,
self.format.display_location,
) {
write!(
writer,
"{}{}{}:",
style.prefix(),
line_number,
style.infix(style)
)?;
}
writer.write_char(' ')?;
let mut v = PrettyVisitor::new(writer.by_ref(), true).with_style(style);
event.record(&mut v);
v.finish()?;
writer.write_char('\n')?;
let dimmed = if writer.has_ansi_escapes() {
Style::new().dimmed().italic()
} else {
Style::new()
};
let thread = self.display_thread_name || self.display_thread_id;
if let (Some(file), true, true) = (
meta.file(),
self.format.display_location,
self.display_filename,
) {
write!(writer, " {} {}", dimmed.paint("at"), file,)?;
if let Some(line) = line_number {
write!(writer, ":{}", line)?;
}
writer.write_char(if thread { ' ' } else { '\n' })?;
} else if thread {
write!(writer, " ")?;
};
if thread {
write!(writer, "{} ", dimmed.paint("on"))?;
let thread = std::thread::current();
if self.display_thread_name {
if let Some(name) = thread.name() {
write!(writer, "{}", name)?;
if self.display_thread_id {
writer.write_char(' ')?;
}
}
}
if self.display_thread_id {
write!(writer, "{:?}", thread.id())?;
}
writer.write_char('\n')?;
}
let bold = writer.bold();
let span = event
.parent()
.and_then(|id| ctx.span(id))
.or_else(|| ctx.lookup_current());
let scope = span.into_iter().flat_map(|span| span.scope());
for span in scope {
let meta = span.metadata();
if self.display_target {
write!(
writer,
" {} {}::{}",
dimmed.paint("in"),
meta.target(),
bold.paint(meta.name()),
)?;
} else {
write!(
writer,
" {} {}",
dimmed.paint("in"),
bold.paint(meta.name()),
)?;
}
let ext = span.extensions();
let fields = &ext
.get::<FormattedFields<N>>()
.expect("Unable to find FormattedFields in extensions; this is a bug");
if !fields.is_empty() {
write!(writer, " {} {}", dimmed.paint("with"), fields)?;
}
writer.write_char('\n')?;
}
writer.write_char('\n')
}
}
impl<'writer> FormatFields<'writer> for Pretty {
fn format_fields<R: RecordFields>(&self, writer: Writer<'writer>, fields: R) -> fmt::Result {
let mut v = PrettyVisitor::new(writer, true);
fields.record(&mut v);
v.finish()
}
fn add_fields(
&self,
current: &'writer mut FormattedFields<Self>,
fields: &span::Record<'_>,
) -> fmt::Result {
let empty = current.is_empty();
let writer = current.as_writer();
let mut v = PrettyVisitor::new(writer, empty);
fields.record(&mut v);
v.finish()
}
}
// === impl PrettyFields ===
impl Default for PrettyFields {
fn default() -> Self {
Self::new()
}
}
impl PrettyFields {
/// Returns a new default [`PrettyFields`] implementation.
pub fn new() -> Self {
// By default, don't override the `Writer`'s ANSI colors
// configuration. We'll only do this if the user calls the
// deprecated `PrettyFields::with_ansi` method.
Self { ansi: None }
}
/// Enable ANSI encoding for formatted fields.
#[deprecated(
since = "0.3.3",
note = "Use `fmt::Subscriber::with_ansi` or `fmt::Layer::with_ansi` instead."
)]
pub fn with_ansi(self, ansi: bool) -> Self {
Self {
ansi: Some(ansi),
..self
}
}
}
impl<'a> MakeVisitor<Writer<'a>> for PrettyFields {
type Visitor = PrettyVisitor<'a>;
#[inline]
fn make_visitor(&self, mut target: Writer<'a>) -> Self::Visitor {
if let Some(ansi) = self.ansi {
target = target.with_ansi(ansi);
}
PrettyVisitor::new(target, true)
}
}
// === impl PrettyVisitor ===
impl<'a> PrettyVisitor<'a> {
/// Returns a new default visitor that formats to the provided `writer`.
///
/// # Arguments
/// - `writer`: the writer to format to.
/// - `is_empty`: whether or not any fields have been previously written to
/// that writer.
pub fn new(writer: Writer<'a>, is_empty: bool) -> Self {
Self {
writer,
is_empty,
style: Style::default(),
result: Ok(()),
}
}
pub(crate) fn with_style(self, style: Style) -> Self {
Self { style, ..self }
}
fn write_padded(&mut self, value: &impl fmt::Debug) {
let padding = if self.is_empty {
self.is_empty = false;
""
} else {
", "
};
self.result = write!(self.writer, "{}{:?}", padding, value);
}
fn bold(&self) -> Style {
if self.writer.has_ansi_escapes() {
self.style.bold()
} else {
Style::new()
}
}
}
impl field::Visit for PrettyVisitor<'_> {
fn record_str(&mut self, field: &Field, value: &str) {
if self.result.is_err() {
return;
}
if field.name() == "message" {
self.record_debug(field, &format_args!("{}", value))
} else {
self.record_debug(field, &value)
}
}
fn record_error(&mut self, field: &Field, value: &(dyn std::error::Error + 'static)) {
if let Some(source) = value.source() {
let bold = self.bold();
self.record_debug(
field,
&format_args!(
"{}, {}{}.sources{}: {}",
value,
bold.prefix(),
field,
bold.infix(self.style),
ErrorSourceList(source),
),
)
} else {
self.record_debug(field, &format_args!("{}", value))
}
}
fn record_debug(&mut self, field: &Field, value: &dyn fmt::Debug) {
if self.result.is_err() {
return;
}
let bold = self.bold();
match field.name() {
"message" => self.write_padded(&format_args!("{}{:?}", self.style.prefix(), value,)),
// Skip fields that are actually log metadata that have already been handled
#[cfg(feature = "tracing-log")]
name if name.starts_with("log.") => self.result = Ok(()),
name if name.starts_with("r#") => self.write_padded(&format_args!(
"{}{}{}: {:?}",
bold.prefix(),
&name[2..],
bold.infix(self.style),
value
)),
name => self.write_padded(&format_args!(
"{}{}{}: {:?}",
bold.prefix(),
name,
bold.infix(self.style),
value
)),
};
}
}
impl VisitOutput<fmt::Result> for PrettyVisitor<'_> {
fn finish(mut self) -> fmt::Result {
write!(&mut self.writer, "{}", self.style.suffix())?;
self.result
}
}
impl VisitFmt for PrettyVisitor<'_> {
fn writer(&mut self) -> &mut dyn fmt::Write {
&mut self.writer
}
}