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Add 'color-spantrace/' from commit '1a52aac2b55a05efc64807f06b91414550805af8'

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Pavan Kumar Sunkara 2023-10-03 21:11:23 +01:00
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on: [push, pull_request]
name: Continuous integration
jobs:
check:
name: Check
runs-on: ubuntu-latest
strategy:
matrix:
rust:
- stable
steps:
- uses: actions/checkout@v1
- uses: actions-rs/toolchain@v1
with:
toolchain: ${{ matrix.rust }}
override: true
- uses: actions-rs/cargo@v1
with:
command: check
test:
name: Test Suite
runs-on: ubuntu-latest
strategy:
matrix:
rust:
- stable
- nightly
steps:
- uses: actions/checkout@v1
- uses: actions-rs/toolchain@v1
with:
toolchain: ${{ matrix.rust }}
override: true
- uses: actions-rs/cargo@v1
with:
command: test
# - uses: actions-rs/cargo@v1
# with:
# command: test
# args: --no-default-features
fmt:
name: Rustfmt
runs-on: ubuntu-latest
strategy:
matrix:
rust:
- stable
steps:
- uses: actions/checkout@v1
- uses: actions-rs/toolchain@v1
with:
toolchain: ${{ matrix.rust }}
override: true
- run: rustup component add rustfmt
- uses: actions-rs/cargo@v1
with:
command: fmt
args: --all -- --check
clippy:
name: Clippy
runs-on: ubuntu-latest
strategy:
matrix:
rust:
- stable
steps:
- uses: actions/checkout@v1
- uses: actions-rs/toolchain@v1
with:
toolchain: ${{ matrix.rust }}
override: true
- run: rustup component add clippy
- uses: actions-rs/cargo@v1
with:
command: clippy
args: -- -D warnings

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/target
Cargo.lock

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# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
<!-- next-header -->
## [Unreleased] - ReleaseDate
## [0.2.0] - 2022-01-12
### Changed
- Updated dependency versions to match latest tracing versions
## [0.1.6] - 2020-12-02
### Fixed
- Ignore all io errors when resolving source files instead of only file not
found errors
## [v0.1.5] - 2020-12-01
### Added
- Support custom color themes for spantrace format
<!-- next-url -->
[Unreleased]: https://github.com/yaahc/color-spantrace/compare/v0.2.0...HEAD
[0.2.0]: https://github.com/yaahc/color-spantrace/compare/v0.1.6...v0.2.0
[0.1.6]: https://github.com/yaahc/color-spantrace/compare/v0.1.5...v0.1.6
[v0.1.5]: https://github.com/yaahc/color-spantrace/releases/tag/v0.1.5

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[package]
name = "color-spantrace"
version = "0.2.0"
authors = ["Jane Lusby <jlusby@yaah.dev>"]
edition = "2018"
license = "MIT OR Apache-2.0"
description = "A pretty printer for tracing_error::SpanTrace based on color-backtrace"
repository = "https://github.com/yaahc/color-spantrace"
documentation = "https://docs.rs/color-spantrace"
readme = "README.md"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
tracing-error = "0.2.0"
tracing-core = "0.1.21"
owo-colors = "3.2.0"
once_cell = "1.4.1"
[dev-dependencies]
tracing-subscriber = "0.3.4"
tracing = "0.1.29"
ansi-parser = "0.8" # used for testing color schemes
[package.metadata.docs.rs]
all-features = true
rustdoc-args = ["--cfg", "docsrs"]
[package.metadata.release]
dev-version = false
[[package.metadata.release.pre-release-replacements]]
file = "CHANGELOG.md"
search = "Unreleased"
replace="{{version}}"
[[package.metadata.release.pre-release-replacements]]
file = "src/lib.rs"
search = "#!\\[doc\\(html_root_url.*"
replace = "#![doc(html_root_url = \"https://docs.rs/{{crate_name}}/{{version}}\")]"
exactly = 1
[[package.metadata.release.pre-release-replacements]]
file = "CHANGELOG.md"
search = "\\.\\.\\.HEAD"
replace="...{{tag_name}}"
exactly = 1
[[package.metadata.release.pre-release-replacements]]
file = "CHANGELOG.md"
search = "ReleaseDate"
replace="{{date}}"
[[package.metadata.release.pre-release-replacements]]
file="CHANGELOG.md"
search="<!-- next-header -->"
replace="<!-- next-header -->\n\n## [Unreleased] - ReleaseDate"
exactly=1
[[package.metadata.release.pre-release-replacements]]
file="CHANGELOG.md"
search="<!-- next-url -->"
replace="<!-- next-url -->\n[Unreleased]: https://github.com/yaahc/{{crate_name}}/compare/{{tag_name}}...HEAD"
exactly=1

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color-spantrace
===============
[![Build Status][actions-badge]][actions-url]
[![Latest Version](https://img.shields.io/crates/v/color-spantrace.svg)](https://crates.io/crates/color-spantrace)
[![Rust Documentation](https://img.shields.io/badge/api-rustdoc-blue.svg)](https://docs.rs/color-spantrace)
[actions-badge]: https://github.com/yaahc/color-spantrace/workflows/Continuous%20integration/badge.svg
[actions-url]: https://github.com/yaahc/color-spantrace/actions?query=workflow%3A%22Continuous+integration%22
A rust library for colorizing [`tracing_error::SpanTrace`] objects in the style
of [`color-backtrace`].
## Setup
Add the following to your `Cargo.toml`:
```toml
[dependencies]
color-spantrace = "0.2"
tracing = "0.1"
tracing-error = "0.2"
tracing-subscriber = "0.3"
```
Setup a tracing subscriber with an `ErrorLayer`:
```rust
use tracing_error::ErrorLayer;
use tracing_subscriber::{prelude::*, registry::Registry};
Registry::default().with(ErrorLayer::default()).init();
```
Create spans and enter them:
```rust
use tracing::instrument;
use tracing_error::SpanTrace;
#[instrument]
fn foo() -> SpanTrace {
SpanTrace::capture()
}
```
And finally colorize the `SpanTrace`:
```rust
use tracing_error::SpanTrace;
let span_trace = SpanTrace::capture();
println!("{}", color_spantrace::colorize(&span_trace));
```
## Example
This example is taken from `examples/usage.rs`:
```rust
use tracing::instrument;
use tracing_error::{ErrorLayer, SpanTrace};
use tracing_subscriber::{prelude::*, registry::Registry};
#[instrument]
fn main() {
Registry::default().with(ErrorLayer::default()).init();
let span_trace = one(42);
println!("{}", color_spantrace::colorize(&span_trace));
}
#[instrument]
fn one(i: u32) -> SpanTrace {
two()
}
#[instrument]
fn two() -> SpanTrace {
SpanTrace::capture()
}
```
This creates the following output
### Minimal Format
![minimal format](./pictures/minimal.png)
### Full Format
![Full format](./pictures/full.png)
#### License
<sup>
Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.
</sup>
<br>
<sub>
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.
</sub>
[`tracing_error::SpanTrace`]: https://docs.rs/tracing-error/*/tracing_error/struct.SpanTrace.html
[`color-backtrace`]: https://github.com/athre0z/color-backtrace

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use tracing::instrument;
use tracing_error::{ErrorLayer, SpanTrace};
use tracing_subscriber::{prelude::*, registry::Registry};
#[instrument]
fn main() {
Registry::default().with(ErrorLayer::default()).init();
let span_trace = one(42);
println!("{}", color_spantrace::colorize(&span_trace));
}
#[instrument]
fn one(i: u32) -> SpanTrace {
two()
}
#[instrument]
fn two() -> SpanTrace {
SpanTrace::capture()
}

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//! A rust library for colorizing [`tracing_error::SpanTrace`] objects in the style
//! of [`color-backtrace`].
//!
//! ## Setup
//!
//! Add the following to your `Cargo.toml`:
//!
//! ```toml
//! [dependencies]
//! color-spantrace = "0.2"
//! tracing = "0.1"
//! tracing-error = "0.2"
//! tracing-subscriber = "0.3"
//! ```
//!
//! Setup a tracing subscriber with an `ErrorLayer`:
//!
//! ```rust
//! use tracing_error::ErrorLayer;
//! use tracing_subscriber::{prelude::*, registry::Registry};
//!
//! Registry::default().with(ErrorLayer::default()).init();
//! ```
//!
//! Create spans and enter them:
//!
//! ```rust
//! use tracing::instrument;
//! use tracing_error::SpanTrace;
//!
//! #[instrument]
//! fn foo() -> SpanTrace {
//! SpanTrace::capture()
//! }
//! ```
//!
//! And finally colorize the `SpanTrace`:
//!
//! ```rust
//! use tracing_error::SpanTrace;
//!
//! let span_trace = SpanTrace::capture();
//! println!("{}", color_spantrace::colorize(&span_trace));
//! ```
//!
//! ## Output Format
//!
//! Running `examples/usage.rs` from the `color-spantrace` repo produces the following output:
//!
//! <pre><font color="#4E9A06"><b>❯</b></font> cargo run --example usage
//! <font color="#4E9A06"><b> Finished</b></font> dev [unoptimized + debuginfo] target(s) in 0.04s
//! <font color="#4E9A06"><b> Running</b></font> `target/debug/examples/usage`
//! ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ SPANTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
//!
//! 0: <font color="#F15D22">usage::two</font>
//! at <font color="#75507B">examples/usage.rs</font>:<font color="#75507B">18</font>
//! 1: <font color="#F15D22">usage::one</font> with <font color="#34E2E2">i=42</font>
//! at <font color="#75507B">examples/usage.rs</font>:<font color="#75507B">13</font></pre>
//!
//! [`tracing_error::SpanTrace`]: https://docs.rs/tracing-error/*/tracing_error/struct.SpanTrace.html
//! [`color-backtrace`]: https://github.com/athre0z/color-backtrace
#![doc(html_root_url = "https://docs.rs/color-spantrace/0.2.0")]
#![warn(
missing_debug_implementations,
missing_docs,
rustdoc::missing_doc_code_examples,
rust_2018_idioms,
unreachable_pub,
bad_style,
const_err,
dead_code,
improper_ctypes,
non_shorthand_field_patterns,
no_mangle_generic_items,
overflowing_literals,
path_statements,
patterns_in_fns_without_body,
private_in_public,
unconditional_recursion,
unused,
unused_allocation,
unused_comparisons,
unused_parens,
while_true
)]
use once_cell::sync::OnceCell;
use owo_colors::{style, Style};
use std::env;
use std::fmt;
use std::fs::File;
use std::io::{BufRead, BufReader};
use tracing_error::SpanTrace;
static THEME: OnceCell<Theme> = OnceCell::new();
/// A struct that represents theme that is used by `color_spantrace`
#[derive(Debug, Copy, Clone, Default)]
pub struct Theme {
file: Style,
line_number: Style,
target: Style,
fields: Style,
active_line: Style,
}
impl Theme {
/// Create blank theme
pub fn new() -> Self {
Self::default()
}
/// A theme for a dark background. This is the default
pub fn dark() -> Self {
Self {
file: style().purple(),
line_number: style().purple(),
active_line: style().white().bold(),
target: style().bright_red(),
fields: style().bright_cyan(),
}
}
// XXX same as with `light` in `color_eyre`
/// A theme for a light background
pub fn light() -> Self {
Self {
file: style().purple(),
line_number: style().purple(),
target: style().red(),
fields: style().blue(),
active_line: style().bold(),
}
}
/// Styles printed paths
pub fn file(mut self, style: Style) -> Self {
self.file = style;
self
}
/// Styles the line number of a file
pub fn line_number(mut self, style: Style) -> Self {
self.line_number = style;
self
}
/// Styles the target (i.e. the module and function name, and so on)
pub fn target(mut self, style: Style) -> Self {
self.target = style;
self
}
/// Styles fields associated with a the `tracing::Span`.
pub fn fields(mut self, style: Style) -> Self {
self.fields = style;
self
}
/// Styles the selected line of displayed code
pub fn active_line(mut self, style: Style) -> Self {
self.active_line = style;
self
}
}
/// An error returned by `set_theme` if a global theme was already set
#[derive(Debug)]
pub struct InstallThemeError;
impl fmt::Display for InstallThemeError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str("could not set the provided `Theme` globally as another was already set")
}
}
impl std::error::Error for InstallThemeError {}
/// Sets the global theme.
///
/// # Details
///
/// This can only be set once and otherwise fails.
///
/// **Note:** `colorize` sets the global theme implicitly, if it was not set already. So calling `colorize` and then `set_theme` fails
pub fn set_theme(theme: Theme) -> Result<(), InstallThemeError> {
THEME.set(theme).map_err(|_| InstallThemeError)
}
/// Display a [`SpanTrace`] with colors and source
///
/// This function returns an `impl Display` type which can be then used in place of the original
/// SpanTrace when writing it too the screen or buffer.
///
/// # Example
///
/// ```rust
/// use tracing_error::SpanTrace;
///
/// let span_trace = SpanTrace::capture();
/// println!("{}", color_spantrace::colorize(&span_trace));
/// ```
///
/// **Note:** `colorize` sets the global theme implicitly, if it was not set already. So calling `colorize` and then `set_theme` fails
///
/// [`SpanTrace`]: https://docs.rs/tracing-error/*/tracing_error/struct.SpanTrace.html
pub fn colorize(span_trace: &SpanTrace) -> impl fmt::Display + '_ {
let theme = *THEME.get_or_init(Theme::dark);
ColorSpanTrace { span_trace, theme }
}
struct ColorSpanTrace<'a> {
span_trace: &'a SpanTrace,
theme: Theme,
}
macro_rules! try_bool {
($e:expr, $dest:ident) => {{
let ret = $e.unwrap_or_else(|e| $dest = Err(e));
if $dest.is_err() {
return false;
}
ret
}};
}
struct Frame<'a> {
metadata: &'a tracing_core::Metadata<'static>,
fields: &'a str,
theme: Theme,
}
/// Defines how verbose the backtrace is supposed to be.
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
enum Verbosity {
/// Print a small message including the panic payload and the panic location.
Minimal,
/// Everything in `Minimal` and additionally print a backtrace.
Medium,
/// Everything in `Medium` plus source snippets for all backtrace locations.
Full,
}
impl Verbosity {
fn lib_from_env() -> Self {
Self::convert_env(
env::var("RUST_LIB_BACKTRACE")
.or_else(|_| env::var("RUST_BACKTRACE"))
.ok(),
)
}
fn convert_env(env: Option<String>) -> Self {
match env {
Some(ref x) if x == "full" => Verbosity::Full,
Some(_) => Verbosity::Medium,
None => Verbosity::Minimal,
}
}
}
impl Frame<'_> {
fn print(&self, i: u32, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.print_header(i, f)?;
self.print_fields(f)?;
self.print_source_location(f)?;
Ok(())
}
fn print_header(&self, i: u32, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"{:>2}: {}{}{}",
i,
self.theme.target.style(self.metadata.target()),
self.theme.target.style("::"),
self.theme.target.style(self.metadata.name()),
)
}
fn print_fields(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if !self.fields.is_empty() {
write!(f, " with {}", self.theme.fields.style(self.fields))?;
}
Ok(())
}
fn print_source_location(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if let Some(file) = self.metadata.file() {
let lineno = self
.metadata
.line()
.map_or("<unknown line>".to_owned(), |x| x.to_string());
write!(
f,
"\n at {}:{}",
self.theme.file.style(file),
self.theme.line_number.style(lineno),
)?;
} else {
write!(f, "\n at <unknown source file>")?;
}
Ok(())
}
fn print_source_if_avail(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let (lineno, filename) = match (self.metadata.line(), self.metadata.file()) {
(Some(a), Some(b)) => (a, b),
// Without a line number and file name, we can't sensibly proceed.
_ => return Ok(()),
};
let file = match File::open(filename) {
Ok(file) => file,
// ignore io errors and just don't print the source
Err(_) => return Ok(()),
};
use std::fmt::Write;
// Extract relevant lines.
let reader = BufReader::new(file);
let start_line = lineno - 2.min(lineno - 1);
let surrounding_src = reader.lines().skip(start_line as usize - 1).take(5);
let mut buf = String::new();
for (line, cur_line_no) in surrounding_src.zip(start_line..) {
if cur_line_no == lineno {
write!(
&mut buf,
"{:>8} > {}",
cur_line_no.to_string(),
line.unwrap()
)?;
write!(f, "\n{}", self.theme.active_line.style(&buf))?;
buf.clear();
} else {
write!(f, "\n{:>8} │ {}", cur_line_no, line.unwrap())?;
}
}
Ok(())
}
}
impl fmt::Display for ColorSpanTrace<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let mut err = Ok(());
let mut span = 0;
writeln!(f, "{:━^80}\n", " SPANTRACE ")?;
self.span_trace.with_spans(|metadata, fields| {
let frame = Frame {
metadata,
fields,
theme: self.theme,
};
if span > 0 {
try_bool!(write!(f, "\n",), err);
}
try_bool!(frame.print(span, f), err);
if Verbosity::lib_from_env() == Verbosity::Full {
try_bool!(frame.print_source_if_avail(f), err);
}
span += 1;
true
});
err
}
}

9
color-spantrace/tests/data/theme_control.txt Normal file
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@ -0,0 +1,9 @@
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ SPANTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
0: themes::test_capture with x=42
at tests/themes.rs:42
40 │ use tracing_subscriber::{prelude::*, registry::Registry};
41 │
 42 > #[instrument]
43 │ fn test_capture(x: u8) -> SpanTrace {
44 │ #[allow(clippy::if_same_then_else)]

93
color-spantrace/tests/themes.rs Normal file
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@ -0,0 +1,93 @@
/*
# How this test works:
1) generate a spantrace with `test_capture`
2) convert the spantrace to a string
3) load stored spantrace control to compare to spantrace string (stored in the path of `control_file_path` below)
4) if `control_file_path` doesn't exist, generate corresponding file in the current working directory and request the user to fix the issue (see below)
5) extract ANSI escaping sequences (of control and current spantrace)
6) compare if the current spantrace and the control contains the same ANSI escape sequences
7) If not, fail and show the full strings of the control and the current spantrace
# Re-generating the control
If the control spantrace is lost and/or it needs to be re-generated, do the following:
1) Checkout the `color_spantrace` version from Git that you want to test against
3) Add this test file to '/tests'
4) If `control_file_path` exist, delete it
5) If you now run this test, it will generate a test control file in the current working directory
6) copy this file to `control_file_path` (see instructions that are shown)
*/
use ansi_parser::{AnsiParser, AnsiSequence, Output};
use std::{fs, path::Path};
use tracing::instrument;
use tracing_error::ErrorLayer;
use tracing_error::SpanTrace;
use tracing_subscriber::{prelude::*, registry::Registry};
#[instrument]
fn test_capture(x: u8) -> SpanTrace {
#[allow(clippy::if_same_then_else)]
if x == 42 {
SpanTrace::capture()
} else {
SpanTrace::capture()
}
}
#[test]
fn test_backwards_compatibility() {
std::env::set_var("RUST_LIB_BACKTRACE", "full");
Registry::default().with(ErrorLayer::default()).init();
let spantrace = test_capture(42);
let colored_spantrace = format!("{}", color_spantrace::colorize(&spantrace));
let control_file_name = "theme_control.txt";
let control_file_path = ["tests/data/", control_file_name].concat();
// If `control_file_path` is missing, save corresponding file to current working directory, and panic with the request to move these files to `control_file_path`, and to commit them to Git. Being explicit (instead of saving directly to `control_file_path` to make sure `control_file_path` is committed to Git. These files anyway should never be missing.
if !Path::new(&control_file_path).is_file() {
std::fs::write(control_file_name, &colored_spantrace)
.expect("\n\nError saving `colored_spanntrace` to a file");
panic!("Required test data missing! Fix this, by moving '{}' to '{}', and commit it to Git.\n\nNote: '{0}' was just generated in the current working directory.\n\n", control_file_name, control_file_path);
}
// `unwrap` should never fail with files generated by this test
let colored_spantrace_control =
String::from_utf8(fs::read(control_file_path).unwrap()).unwrap();
fn get_ansi(s: &str) -> impl Iterator<Item = AnsiSequence> + '_ {
s.ansi_parse().filter_map(|x| {
if let Output::Escape(ansi) = x {
Some(ansi)
} else {
None
}
})
}
let colored_spantrace_ansi = get_ansi(&colored_spantrace);
let colored_spantrace_control_ansi = get_ansi(&colored_spantrace_control);
assert!(
colored_spantrace_ansi.eq(colored_spantrace_control_ansi),
"\x1b[0mANSI escape sequences are not identical to control!\n\nCONTROL:\n\n{}\n\n\n\n{:?}\n\nCURRENT:\n\n{}\n\n\n\n{:?}\n\n", &colored_spantrace_control, &colored_spantrace_control, &colored_spantrace, &colored_spantrace
// `\x1b[0m` clears previous ANSI escape sequences
);
}