Report
Report is a simple logging and error-reporting library. It is designed to be:
- Simple: There is almost no boilerplate required. It is not required to define error enums or implement traits.
- Compatible: This library will work with other libraries that don't use the custom
Result
or Error
types from this crate.
- Efficient: Strings are only formatted when it is clear that they will actually be printed.
Example
use report::{Result, log, report, info, bail};
use std::fs::File;
use std::io::{BufRead, BufReader};
#[report]
#[log("Running experiments")]
fn main() {
let path = "data.txt";
#[report("Running task one on {path}")]
task_one(path).ok();
let path = "Cargo.toml";
#[report("Running task two on {path}")]
task_two(path).ok();
}
fn task_one(file: &str) -> Result {
let _file = File::open(file)?;
bail!("File exists, even though it should not")
}
#[report]
fn task_two(file: &str) -> Result {
let file = File::open(file)?;
let metadata = file.metadata()?;
info!("File size: {}", metadata.len());
for line in BufReader::new(file).lines() {
#[report("Reading line")]
let line = line?;
if line.starts_with("[") {
info!("Found section: {line}");
}
}
Ok(())
}
Output
╭───────────────────────────────────────────────────────────────────────────────────────╮
│ Running experinments │
├─┬─────────────────────────────────────────────────────────────────────────────────────┤
│ ├── Running task one on data.txt │
│ │ ╰── error: No such file or directory (os error 2) │
│ ╰── Running task two on Cargo.toml │
│ ├── info: File size: 552 │
│ ├── info: Found section: [package] │
│ ├── info: Found section: [workspace] │
│ ├── info: Found section: [dependencies] │
│ ╰── info: Found section: [features] │
╰───────────────────────────────────────────────────────────────────────────────────────╯
Feature Flags
Flag |
Description |
unicode |
Use unicode box drawing characters. |
color |
Use colors for the log level. |
frame |
Draw a frame around every report |