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John Doty 2024-03-08 11:03:01 -08:00
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1
third-party/vendor/env_logger/.cargo-checksum.json vendored Normal file
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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
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# with all versions of Cargo and also rewrite `path` dependencies
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#
# If you are reading this file be aware that the original Cargo.toml
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# See Cargo.toml.orig for the original contents.
[package]
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Apache License
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http://www.apache.org/licenses/
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has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright {yyyy} {name of copyright owner}
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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Copyright (c) Individual contributors
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# env_logger
[![crates.io](https://img.shields.io/crates/v/env_logger.svg)](https://crates.io/crates/env_logger)
[![Documentation](https://docs.rs/env_logger/badge.svg)](https://docs.rs/env_logger)
Implements a logger that can be configured via environment variables.
## Usage
### In libraries
`env_logger` makes sense when used in executables (binary projects). Libraries should use the [`log`](https://docs.rs/log) crate instead.
### In executables
It must be added along with `log` to the project dependencies:
```console
$ cargo add log env_logger
```
`env_logger` must be initialized as early as possible in the project. After it's initialized, you can use the `log` macros to do actual logging.
```rust
use log::info;
fn main() {
env_logger::init();
info!("starting up");
// ...
}
```
Then when running the executable, specify a value for the **`RUST_LOG`**
environment variable that corresponds with the log messages you want to show.
```bash
$ RUST_LOG=info ./main
[2018-11-03T06:09:06Z INFO default] starting up
```
The letter case is not significant for the logging level names; e.g., `debug`,
`DEBUG`, and `dEbuG` all represent the same logging level. Therefore, the
previous example could also have been written this way, specifying the log
level as `INFO` rather than as `info`:
```bash
$ RUST_LOG=INFO ./main
[2018-11-03T06:09:06Z INFO default] starting up
```
So which form should you use? For consistency, our convention is to use lower
case names. Where our docs do use other forms, they do so in the context of
specific examples, so you won't be surprised if you see similar usage in the
wild.
The log levels that may be specified correspond to the [`log::Level`][level-enum]
enum from the `log` crate. They are:
* `error`
* `warn`
* `info`
* `debug`
* `trace`
[level-enum]: https://docs.rs/log/latest/log/enum.Level.html "log::Level (docs.rs)"
There is also a pseudo logging level, `off`, which may be specified to disable
all logging for a given module or for the entire application. As with the
logging levels, the letter case is not significant.
`env_logger` can be configured in other ways besides an environment variable. See [the examples](https://github.com/rust-cli/env_logger/tree/main/examples) for more approaches.
### In tests
Tests can use the `env_logger` crate to see log messages generated during that test:
```toml
[dependencies]
log = "0.4.0"
[dev-dependencies]
env_logger = "0.10.0"
```
```rust
fn add_one(num: i32) -> i32 {
info!("add_one called with {}", num);
num + 1
}
#[cfg(test)]
mod tests {
use super::*;
use log::info;
fn init() {
let _ = env_logger::builder().is_test(true).try_init();
}
#[test]
fn it_adds_one() {
init();
info!("can log from the test too");
assert_eq!(3, add_one(2));
}
#[test]
fn it_handles_negative_numbers() {
init();
info!("logging from another test");
assert_eq!(-7, add_one(-8));
}
}
```
Assuming the module under test is called `my_lib`, running the tests with the
`RUST_LOG` filtering to info messages from this module looks like:
```bash
$ RUST_LOG=my_lib=info cargo test
Running target/debug/my_lib-...
running 2 tests
[INFO my_lib::tests] logging from another test
[INFO my_lib] add_one called with -8
test tests::it_handles_negative_numbers ... ok
[INFO my_lib::tests] can log from the test too
[INFO my_lib] add_one called with 2
test tests::it_adds_one ... ok
test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured
```
Note that `env_logger::try_init()` needs to be called in each test in which you
want to enable logging. Additionally, the default behavior of tests to
run in parallel means that logging output may be interleaved with test output.
Either run tests in a single thread by specifying `RUST_TEST_THREADS=1` or by
running one test by specifying its name as an argument to the test binaries as
directed by the `cargo test` help docs:
```bash
$ RUST_LOG=my_lib=info cargo test it_adds_one
Running target/debug/my_lib-...
running 1 test
[INFO my_lib::tests] can log from the test too
[INFO my_lib] add_one called with 2
test tests::it_adds_one ... ok
test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured
```
## Configuring log target
By default, `env_logger` logs to stderr. If you want to log to stdout instead,
you can use the `Builder` to change the log target:
```rust
use std::env;
use env_logger::{Builder, Target};
let mut builder = Builder::from_default_env();
builder.target(Target::Stdout);
builder.init();
```
## Stability of the default format
The default format won't optimise for long-term stability, and explicitly makes no guarantees about the stability of its output across major, minor or patch version bumps during `0.x`.
If you want to capture or interpret the output of `env_logger` programmatically then you should use a custom format.

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/*!
Disabling parts of the default format.
Before running this example, try setting the `MY_LOG_LEVEL` environment variable to `info`:
```no_run,shell
$ export MY_LOG_LEVEL='info'
```
Also try setting the `MY_LOG_STYLE` environment variable to `never` to disable colors
or `auto` to enable them:
```no_run,shell
$ export MY_LOG_STYLE=never
```
If you want to control the logging output completely, see the `custom_logger` example.
*/
use log::info;
use env_logger::{Builder, Env};
fn init_logger() {
let env = Env::default()
.filter("MY_LOG_LEVEL")
.write_style("MY_LOG_STYLE");
Builder::from_env(env)
.format_level(false)
.format_timestamp_nanos()
.init();
}
fn main() {
init_logger();
info!("a log from `MyLogger`");
}

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/*!
Changing the default logging format.
Before running this example, try setting the `MY_LOG_LEVEL` environment variable to `info`:
```no_run,shell
$ export MY_LOG_LEVEL='info'
```
Also try setting the `MY_LOG_STYLE` environment variable to `never` to disable colors
or `auto` to enable them:
```no_run,shell
$ export MY_LOG_STYLE=never
```
If you want to control the logging output completely, see the `custom_logger` example.
*/
#[cfg(all(feature = "color", feature = "humantime"))]
fn main() {
use env_logger::{fmt::Color, Builder, Env};
use std::io::Write;
fn init_logger() {
let env = Env::default()
.filter("MY_LOG_LEVEL")
.write_style("MY_LOG_STYLE");
Builder::from_env(env)
.format(|buf, record| {
let mut style = buf.style();
style.set_bg(Color::Yellow).set_bold(true);
let timestamp = buf.timestamp();
writeln!(
buf,
"My formatted log ({}): {}",
timestamp,
style.value(record.args())
)
})
.init();
}
init_logger();
log::info!("a log from `MyLogger`");
}
#[cfg(not(all(feature = "color", feature = "humantime")))]
fn main() {}

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/*!
Using `env_logger` to drive a custom logger.
Before running this example, try setting the `MY_LOG_LEVEL` environment variable to `info`:
```no_run,shell
$ export MY_LOG_LEVEL='info'
```
If you only want to change the way logs are formatted, look at the `custom_format` example.
*/
use env_logger::filter::{Builder, Filter};
use log::{info, Log, Metadata, Record, SetLoggerError};
const FILTER_ENV: &str = "MY_LOG_LEVEL";
struct MyLogger {
inner: Filter,
}
impl MyLogger {
fn new() -> MyLogger {
let mut builder = Builder::from_env(FILTER_ENV);
MyLogger {
inner: builder.build(),
}
}
fn init() -> Result<(), SetLoggerError> {
let logger = Self::new();
log::set_max_level(logger.inner.filter());
log::set_boxed_logger(Box::new(logger))
}
}
impl Log for MyLogger {
fn enabled(&self, metadata: &Metadata) -> bool {
self.inner.enabled(metadata)
}
fn log(&self, record: &Record) {
// Check if the record is matched by the logger before logging
if self.inner.matches(record) {
println!("{} - {}", record.level(), record.args());
}
}
fn flush(&self) {}
}
fn main() {
MyLogger::init().unwrap();
info!("a log from `MyLogger`");
}

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/*!
Using `env_logger`.
Before running this example, try setting the `MY_LOG_LEVEL` environment variable to `info`:
```no_run,shell
$ export MY_LOG_LEVEL='info'
```
Also try setting the `MY_LOG_STYLE` environment variable to `never` to disable colors
or `auto` to enable them:
```no_run,shell
$ export MY_LOG_STYLE=never
```
*/
use log::{debug, error, info, trace, warn};
use env_logger::Env;
fn main() {
// The `Env` lets us tweak what the environment
// variables to read are and what the default
// value is if they're missing
let env = Env::default()
.filter_or("MY_LOG_LEVEL", "trace")
.write_style_or("MY_LOG_STYLE", "always");
env_logger::init_from_env(env);
trace!("some trace log");
debug!("some debug log");
info!("some information log");
warn!("some warning log");
error!("some error log");
}

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/*!
Using `env_logger::Logger` and the `log::Log` trait directly.
This example doesn't rely on environment variables, or having a static logger installed.
*/
use env_logger::{Builder, WriteStyle};
use log::{Level, LevelFilter, Log, MetadataBuilder, Record};
fn record() -> Record<'static> {
let error_metadata = MetadataBuilder::new()
.target("myApp")
.level(Level::Error)
.build();
Record::builder()
.metadata(error_metadata)
.args(format_args!("Error!"))
.line(Some(433))
.file(Some("app.rs"))
.module_path(Some("server"))
.build()
}
fn main() {
let stylish_logger = Builder::new()
.filter(None, LevelFilter::Error)
.write_style(WriteStyle::Always)
.build();
let unstylish_logger = Builder::new()
.filter(None, LevelFilter::Error)
.write_style(WriteStyle::Never)
.build();
stylish_logger.log(&record());
unstylish_logger.log(&record());
}

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/*!
Specify logging filters in code instead of using an environment variable.
*/
use env_logger::Builder;
use log::{debug, error, info, trace, warn, LevelFilter};
fn main() {
Builder::new().filter_level(LevelFilter::max()).init();
trace!("some trace log");
debug!("some debug log");
info!("some information log");
warn!("some warning log");
error!("some error log");
}

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/*!
Using `env_logger` in tests.
Log events will be captured by `cargo` and only printed if the test fails.
You can run this example by calling:
```text
cargo test --example in_tests
```
You should see the `it_does_not_work` test fail and include its log output.
*/
fn main() {}
#[cfg(test)]
mod tests {
use log::debug;
fn init_logger() {
let _ = env_logger::builder()
// Include all events in tests
.filter_level(log::LevelFilter::max())
// Ensure events are captured by `cargo test`
.is_test(true)
// Ignore errors initializing the logger if tests race to configure it
.try_init();
}
#[test]
fn it_works() {
init_logger();
let a = 1;
let b = 2;
debug!("checking whether {} + {} = 3", a, b);
assert_eq!(3, a + b);
}
#[test]
fn it_does_not_work() {
init_logger();
let a = 1;
let b = 2;
debug!("checking whether {} + {} = 6", a, b);
assert_eq!(6, a + b);
}
}

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use std::io::Write;
fn main() {
match std::env::var("RUST_LOG_STYLE") {
Ok(s) if s == "SYSTEMD" => env_logger::builder()
.format(|buf, record| {
writeln!(
buf,
"<{}>{}: {}",
match record.level() {
log::Level::Error => 3,
log::Level::Warn => 4,
log::Level::Info => 6,
log::Level::Debug => 7,
log::Level::Trace => 7,
},
record.target(),
record.args()
)
})
.init(),
_ => env_logger::init(),
};
}

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//! Filtering for log records.
//!
//! This module contains the log filtering used by `env_logger` to match records.
//! You can use the `Filter` type in your own logger implementation to use the same
//! filter parsing and matching as `env_logger`. For more details about the format
//! for directive strings see [Enabling Logging].
//!
//! ## Using `env_logger` in your own logger
//!
//! You can use `env_logger`'s filtering functionality with your own logger.
//! Call [`Builder::parse`] to parse directives from a string when constructing
//! your logger. Call [`Filter::matches`] to check whether a record should be
//! logged based on the parsed filters when log records are received.
//!
//! ```
//! extern crate log;
//! extern crate env_logger;
//! use env_logger::filter::Filter;
//! use log::{Log, Metadata, Record};
//!
//! struct MyLogger {
//! filter: Filter
//! }
//!
//! impl MyLogger {
//! fn new() -> MyLogger {
//! use env_logger::filter::Builder;
//! let mut builder = Builder::new();
//!
//! // Parse a directives string from an environment variable
//! if let Ok(ref filter) = std::env::var("MY_LOG_LEVEL") {
//! builder.parse(filter);
//! }
//!
//! MyLogger {
//! filter: builder.build()
//! }
//! }
//! }
//!
//! impl Log for MyLogger {
//! fn enabled(&self, metadata: &Metadata) -> bool {
//! self.filter.enabled(metadata)
//! }
//!
//! fn log(&self, record: &Record) {
//! // Check if the record is matched by the filter
//! if self.filter.matches(record) {
//! println!("{:?}", record);
//! }
//! }
//!
//! fn flush(&self) {}
//! }
//! ```
//!
//! [Enabling Logging]: ../index.html#enabling-logging
//! [`Builder::parse`]: struct.Builder.html#method.parse
//! [`Filter::matches`]: struct.Filter.html#method.matches
use log::{Level, LevelFilter, Metadata, Record};
use std::env;
use std::fmt;
use std::mem;
#[cfg(feature = "regex")]
#[path = "regex.rs"]
mod inner;
#[cfg(not(feature = "regex"))]
#[path = "string.rs"]
mod inner;
/// A builder for a log filter.
///
/// It can be used to parse a set of directives from a string before building
/// a [`Filter`] instance.
///
/// ## Example
///
/// ```
/// # #[macro_use] extern crate log;
/// # use std::env;
/// use env_logger::filter::Builder;
///
/// let mut builder = Builder::new();
///
/// // Parse a logging filter from an environment variable.
/// if let Ok(rust_log) = env::var("RUST_LOG") {
/// builder.parse(&rust_log);
/// }
///
/// let filter = builder.build();
/// ```
///
/// [`Filter`]: struct.Filter.html
pub struct Builder {
directives: Vec<Directive>,
filter: Option<inner::Filter>,
built: bool,
}
impl Builder {
/// Initializes the filter builder with defaults.
pub fn new() -> Builder {
Builder {
directives: Vec::new(),
filter: None,
built: false,
}
}
/// Initializes the filter builder from an environment.
pub fn from_env(env: &str) -> Builder {
let mut builder = Builder::new();
if let Ok(s) = env::var(env) {
builder.parse(&s);
}
builder
}
/// Insert the directive replacing any directive with the same name.
fn insert_directive(&mut self, mut directive: Directive) {
if let Some(pos) = self
.directives
.iter()
.position(|d| d.name == directive.name)
{
mem::swap(&mut self.directives[pos], &mut directive);
} else {
self.directives.push(directive);
}
}
/// Adds a directive to the filter for a specific module.
pub fn filter_module(&mut self, module: &str, level: LevelFilter) -> &mut Self {
self.filter(Some(module), level)
}
/// Adds a directive to the filter for all modules.
pub fn filter_level(&mut self, level: LevelFilter) -> &mut Self {
self.filter(None, level)
}
/// Adds a directive to the filter.
///
/// The given module (if any) will log at most the specified level provided.
/// If no module is provided then the filter will apply to all log messages.
pub fn filter(&mut self, module: Option<&str>, level: LevelFilter) -> &mut Self {
self.insert_directive(Directive {
name: module.map(|s| s.to_string()),
level,
});
self
}
/// Parses the directives string.
///
/// See the [Enabling Logging] section for more details.
///
/// [Enabling Logging]: ../index.html#enabling-logging
pub fn parse(&mut self, filters: &str) -> &mut Self {
let (directives, filter) = parse_spec(filters);
self.filter = filter;
for directive in directives {
self.insert_directive(directive);
}
self
}
/// Build a log filter.
pub fn build(&mut self) -> Filter {
assert!(!self.built, "attempt to re-use consumed builder");
self.built = true;
let mut directives = Vec::new();
if self.directives.is_empty() {
// Adds the default filter if none exist
directives.push(Directive {
name: None,
level: LevelFilter::Error,
});
} else {
// Consume directives.
directives = mem::take(&mut self.directives);
// Sort the directives by length of their name, this allows a
// little more efficient lookup at runtime.
directives.sort_by(|a, b| {
let alen = a.name.as_ref().map(|a| a.len()).unwrap_or(0);
let blen = b.name.as_ref().map(|b| b.len()).unwrap_or(0);
alen.cmp(&blen)
});
}
Filter {
directives: mem::take(&mut directives),
filter: mem::take(&mut self.filter),
}
}
}
impl Default for Builder {
fn default() -> Self {
Builder::new()
}
}
impl fmt::Debug for Builder {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
if self.built {
f.debug_struct("Filter").field("built", &true).finish()
} else {
f.debug_struct("Filter")
.field("filter", &self.filter)
.field("directives", &self.directives)
.finish()
}
}
}
#[derive(Debug)]
struct Directive {
name: Option<String>,
level: LevelFilter,
}
/// A log filter.
///
/// This struct can be used to determine whether or not a log record
/// should be written to the output.
/// Use the [`Builder`] type to parse and construct a `Filter`.
///
/// [`Builder`]: struct.Builder.html
pub struct Filter {
directives: Vec<Directive>,
filter: Option<inner::Filter>,
}
impl Filter {
/// Returns the maximum `LevelFilter` that this filter instance is
/// configured to output.
///
/// # Example
///
/// ```rust
/// use log::LevelFilter;
/// use env_logger::filter::Builder;
///
/// let mut builder = Builder::new();
/// builder.filter(Some("module1"), LevelFilter::Info);
/// builder.filter(Some("module2"), LevelFilter::Error);
///
/// let filter = builder.build();
/// assert_eq!(filter.filter(), LevelFilter::Info);
/// ```
pub fn filter(&self) -> LevelFilter {
self.directives
.iter()
.map(|d| d.level)
.max()
.unwrap_or(LevelFilter::Off)
}
/// Checks if this record matches the configured filter.
pub fn matches(&self, record: &Record) -> bool {
if !self.enabled(record.metadata()) {
return false;
}
if let Some(filter) = self.filter.as_ref() {
if !filter.is_match(&record.args().to_string()) {
return false;
}
}
true
}
/// Determines if a log message with the specified metadata would be logged.
pub fn enabled(&self, metadata: &Metadata) -> bool {
let level = metadata.level();
let target = metadata.target();
enabled(&self.directives, level, target)
}
}
impl fmt::Debug for Filter {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("Filter")
.field("filter", &self.filter)
.field("directives", &self.directives)
.finish()
}
}
/// Parse a logging specification string (e.g: "crate1,crate2::mod3,crate3::x=error/foo")
/// and return a vector with log directives.
fn parse_spec(spec: &str) -> (Vec<Directive>, Option<inner::Filter>) {
let mut dirs = Vec::new();
let mut parts = spec.split('/');
let mods = parts.next();
let filter = parts.next();
if parts.next().is_some() {
eprintln!(
"warning: invalid logging spec '{}', \
ignoring it (too many '/'s)",
spec
);
return (dirs, None);
}
if let Some(m) = mods {
for s in m.split(',').map(|ss| ss.trim()) {
if s.is_empty() {
continue;
}
let mut parts = s.split('=');
let (log_level, name) =
match (parts.next(), parts.next().map(|s| s.trim()), parts.next()) {
(Some(part0), None, None) => {
// if the single argument is a log-level string or number,
// treat that as a global fallback
match part0.parse() {
Ok(num) => (num, None),
Err(_) => (LevelFilter::max(), Some(part0)),
}
}
(Some(part0), Some(""), None) => (LevelFilter::max(), Some(part0)),
(Some(part0), Some(part1), None) => match part1.parse() {
Ok(num) => (num, Some(part0)),
_ => {
eprintln!(
"warning: invalid logging spec '{}', \
ignoring it",
part1
);
continue;
}
},
_ => {
eprintln!(
"warning: invalid logging spec '{}', \
ignoring it",
s
);
continue;
}
};
dirs.push(Directive {
name: name.map(|s| s.to_string()),
level: log_level,
});
}
}
let filter = filter.and_then(|filter| match inner::Filter::new(filter) {
Ok(re) => Some(re),
Err(e) => {
eprintln!("warning: invalid regex filter - {}", e);
None
}
});
(dirs, filter)
}
// Check whether a level and target are enabled by the set of directives.
fn enabled(directives: &[Directive], level: Level, target: &str) -> bool {
// Search for the longest match, the vector is assumed to be pre-sorted.
for directive in directives.iter().rev() {
match directive.name {
Some(ref name) if !target.starts_with(&**name) => {}
Some(..) | None => return level <= directive.level,
}
}
false
}
#[cfg(test)]
mod tests {
use log::{Level, LevelFilter};
use super::{enabled, parse_spec, Builder, Directive, Filter};
fn make_logger_filter(dirs: Vec<Directive>) -> Filter {
let mut logger = Builder::new().build();
logger.directives = dirs;
logger
}
#[test]
fn filter_info() {
let logger = Builder::new().filter(None, LevelFilter::Info).build();
assert!(enabled(&logger.directives, Level::Info, "crate1"));
assert!(!enabled(&logger.directives, Level::Debug, "crate1"));
}
#[test]
fn filter_beginning_longest_match() {
let logger = Builder::new()
.filter(Some("crate2"), LevelFilter::Info)
.filter(Some("crate2::mod"), LevelFilter::Debug)
.filter(Some("crate1::mod1"), LevelFilter::Warn)
.build();
assert!(enabled(&logger.directives, Level::Debug, "crate2::mod1"));
assert!(!enabled(&logger.directives, Level::Debug, "crate2"));
}
// Some of our tests are only correct or complete when they cover the full
// universe of variants for log::Level. In the unlikely event that a new
// variant is added in the future, this test will detect the scenario and
// alert us to the need to review and update the tests. In such a
// situation, this test will fail to compile, and the error message will
// look something like this:
//
// error[E0004]: non-exhaustive patterns: `NewVariant` not covered
// --> src/filter/mod.rs:413:15
// |
// 413 | match level_universe {
// | ^^^^^^^^^^^^^^ pattern `NewVariant` not covered
#[test]
fn ensure_tests_cover_level_universe() {
let level_universe: Level = Level::Trace; // use of trace variant is arbitrary
match level_universe {
Level::Error | Level::Warn | Level::Info | Level::Debug | Level::Trace => (),
}
}
#[test]
fn parse_default() {
let logger = Builder::new().parse("info,crate1::mod1=warn").build();
assert!(enabled(&logger.directives, Level::Warn, "crate1::mod1"));
assert!(enabled(&logger.directives, Level::Info, "crate2::mod2"));
}
#[test]
fn parse_default_bare_level_off_lc() {
let logger = Builder::new().parse("off").build();
assert!(!enabled(&logger.directives, Level::Error, ""));
assert!(!enabled(&logger.directives, Level::Warn, ""));
assert!(!enabled(&logger.directives, Level::Info, ""));
assert!(!enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_off_uc() {
let logger = Builder::new().parse("OFF").build();
assert!(!enabled(&logger.directives, Level::Error, ""));
assert!(!enabled(&logger.directives, Level::Warn, ""));
assert!(!enabled(&logger.directives, Level::Info, ""));
assert!(!enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_error_lc() {
let logger = Builder::new().parse("error").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(!enabled(&logger.directives, Level::Warn, ""));
assert!(!enabled(&logger.directives, Level::Info, ""));
assert!(!enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_error_uc() {
let logger = Builder::new().parse("ERROR").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(!enabled(&logger.directives, Level::Warn, ""));
assert!(!enabled(&logger.directives, Level::Info, ""));
assert!(!enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_warn_lc() {
let logger = Builder::new().parse("warn").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(!enabled(&logger.directives, Level::Info, ""));
assert!(!enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_warn_uc() {
let logger = Builder::new().parse("WARN").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(!enabled(&logger.directives, Level::Info, ""));
assert!(!enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_info_lc() {
let logger = Builder::new().parse("info").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(enabled(&logger.directives, Level::Info, ""));
assert!(!enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_info_uc() {
let logger = Builder::new().parse("INFO").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(enabled(&logger.directives, Level::Info, ""));
assert!(!enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_debug_lc() {
let logger = Builder::new().parse("debug").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(enabled(&logger.directives, Level::Info, ""));
assert!(enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_debug_uc() {
let logger = Builder::new().parse("DEBUG").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(enabled(&logger.directives, Level::Info, ""));
assert!(enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_trace_lc() {
let logger = Builder::new().parse("trace").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(enabled(&logger.directives, Level::Info, ""));
assert!(enabled(&logger.directives, Level::Debug, ""));
assert!(enabled(&logger.directives, Level::Trace, ""));
}
#[test]
fn parse_default_bare_level_trace_uc() {
let logger = Builder::new().parse("TRACE").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(enabled(&logger.directives, Level::Info, ""));
assert!(enabled(&logger.directives, Level::Debug, ""));
assert!(enabled(&logger.directives, Level::Trace, ""));
}
// In practice, the desired log level is typically specified by a token
// that is either all lowercase (e.g., 'trace') or all uppercase (.e.g,
// 'TRACE'), but this tests serves as a reminder that
// log::Level::from_str() ignores all case variants.
#[test]
fn parse_default_bare_level_debug_mixed() {
{
let logger = Builder::new().parse("Debug").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(enabled(&logger.directives, Level::Info, ""));
assert!(enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
{
let logger = Builder::new().parse("debuG").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(enabled(&logger.directives, Level::Info, ""));
assert!(enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
{
let logger = Builder::new().parse("deBug").build();
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(enabled(&logger.directives, Level::Info, ""));
assert!(enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
{
let logger = Builder::new().parse("DeBuG").build(); // LaTeX flavor!
assert!(enabled(&logger.directives, Level::Error, ""));
assert!(enabled(&logger.directives, Level::Warn, ""));
assert!(enabled(&logger.directives, Level::Info, ""));
assert!(enabled(&logger.directives, Level::Debug, ""));
assert!(!enabled(&logger.directives, Level::Trace, ""));
}
}
#[test]
fn match_full_path() {
let logger = make_logger_filter(vec![
Directive {
name: Some("crate2".to_string()),
level: LevelFilter::Info,
},
Directive {
name: Some("crate1::mod1".to_string()),
level: LevelFilter::Warn,
},
]);
assert!(enabled(&logger.directives, Level::Warn, "crate1::mod1"));
assert!(!enabled(&logger.directives, Level::Info, "crate1::mod1"));
assert!(enabled(&logger.directives, Level::Info, "crate2"));
assert!(!enabled(&logger.directives, Level::Debug, "crate2"));
}
#[test]
fn no_match() {
let logger = make_logger_filter(vec![
Directive {
name: Some("crate2".to_string()),
level: LevelFilter::Info,
},
Directive {
name: Some("crate1::mod1".to_string()),
level: LevelFilter::Warn,
},
]);
assert!(!enabled(&logger.directives, Level::Warn, "crate3"));
}
#[test]
fn match_beginning() {
let logger = make_logger_filter(vec![
Directive {
name: Some("crate2".to_string()),
level: LevelFilter::Info,
},
Directive {
name: Some("crate1::mod1".to_string()),
level: LevelFilter::Warn,
},
]);
assert!(enabled(&logger.directives, Level::Info, "crate2::mod1"));
}
#[test]
fn match_beginning_longest_match() {
let logger = make_logger_filter(vec![
Directive {
name: Some("crate2".to_string()),
level: LevelFilter::Info,
},
Directive {
name: Some("crate2::mod".to_string()),
level: LevelFilter::Debug,
},
Directive {
name: Some("crate1::mod1".to_string()),
level: LevelFilter::Warn,
},
]);
assert!(enabled(&logger.directives, Level::Debug, "crate2::mod1"));
assert!(!enabled(&logger.directives, Level::Debug, "crate2"));
}
#[test]
fn match_default() {
let logger = make_logger_filter(vec![
Directive {
name: None,
level: LevelFilter::Info,
},
Directive {
name: Some("crate1::mod1".to_string()),
level: LevelFilter::Warn,
},
]);
assert!(enabled(&logger.directives, Level::Warn, "crate1::mod1"));
assert!(enabled(&logger.directives, Level::Info, "crate2::mod2"));
}
#[test]
fn zero_level() {
let logger = make_logger_filter(vec![
Directive {
name: None,
level: LevelFilter::Info,
},
Directive {
name: Some("crate1::mod1".to_string()),
level: LevelFilter::Off,
},
]);
assert!(!enabled(&logger.directives, Level::Error, "crate1::mod1"));
assert!(enabled(&logger.directives, Level::Info, "crate2::mod2"));
}
#[test]
fn parse_spec_valid() {
let (dirs, filter) = parse_spec("crate1::mod1=error,crate1::mod2,crate2=debug");
assert_eq!(dirs.len(), 3);
assert_eq!(dirs[0].name, Some("crate1::mod1".to_string()));
assert_eq!(dirs[0].level, LevelFilter::Error);
assert_eq!(dirs[1].name, Some("crate1::mod2".to_string()));
assert_eq!(dirs[1].level, LevelFilter::max());
assert_eq!(dirs[2].name, Some("crate2".to_string()));
assert_eq!(dirs[2].level, LevelFilter::Debug);
assert!(filter.is_none());
}
#[test]
fn parse_spec_invalid_crate() {
// test parse_spec with multiple = in specification
let (dirs, filter) = parse_spec("crate1::mod1=warn=info,crate2=debug");
assert_eq!(dirs.len(), 1);
assert_eq!(dirs[0].name, Some("crate2".to_string()));
assert_eq!(dirs[0].level, LevelFilter::Debug);
assert!(filter.is_none());
}
#[test]
fn parse_spec_invalid_level() {
// test parse_spec with 'noNumber' as log level
let (dirs, filter) = parse_spec("crate1::mod1=noNumber,crate2=debug");
assert_eq!(dirs.len(), 1);
assert_eq!(dirs[0].name, Some("crate2".to_string()));
assert_eq!(dirs[0].level, LevelFilter::Debug);
assert!(filter.is_none());
}
#[test]
fn parse_spec_string_level() {
// test parse_spec with 'warn' as log level
let (dirs, filter) = parse_spec("crate1::mod1=wrong,crate2=warn");
assert_eq!(dirs.len(), 1);
assert_eq!(dirs[0].name, Some("crate2".to_string()));
assert_eq!(dirs[0].level, LevelFilter::Warn);
assert!(filter.is_none());
}
#[test]
fn parse_spec_empty_level() {
// test parse_spec with '' as log level
let (dirs, filter) = parse_spec("crate1::mod1=wrong,crate2=");
assert_eq!(dirs.len(), 1);
assert_eq!(dirs[0].name, Some("crate2".to_string()));
assert_eq!(dirs[0].level, LevelFilter::max());
assert!(filter.is_none());
}
#[test]
fn parse_spec_empty_level_isolated() {
// test parse_spec with "" as log level (and the entire spec str)
let (dirs, filter) = parse_spec(""); // should be ignored
assert_eq!(dirs.len(), 0);
assert!(filter.is_none());
}
#[test]
fn parse_spec_blank_level_isolated() {
// test parse_spec with a white-space-only string specified as the log
// level (and the entire spec str)
let (dirs, filter) = parse_spec(" "); // should be ignored
assert_eq!(dirs.len(), 0);
assert!(filter.is_none());
}
#[test]
fn parse_spec_blank_level_isolated_comma_only() {
// The spec should contain zero or more comma-separated string slices,
// so a comma-only string should be interpreted as two empty strings
// (which should both be treated as invalid, so ignored).
let (dirs, filter) = parse_spec(","); // should be ignored
assert_eq!(dirs.len(), 0);
assert!(filter.is_none());
}
#[test]
fn parse_spec_blank_level_isolated_comma_blank() {
// The spec should contain zero or more comma-separated string slices,
// so this bogus spec should be interpreted as containing one empty
// string and one blank string. Both should both be treated as
// invalid, so ignored.
let (dirs, filter) = parse_spec(", "); // should be ignored
assert_eq!(dirs.len(), 0);
assert!(filter.is_none());
}
#[test]
fn parse_spec_blank_level_isolated_blank_comma() {
// The spec should contain zero or more comma-separated string slices,
// so this bogus spec should be interpreted as containing one blank
// string and one empty string. Both should both be treated as
// invalid, so ignored.
let (dirs, filter) = parse_spec(" ,"); // should be ignored
assert_eq!(dirs.len(), 0);
assert!(filter.is_none());
}
#[test]
fn parse_spec_global() {
// test parse_spec with no crate
let (dirs, filter) = parse_spec("warn,crate2=debug");
assert_eq!(dirs.len(), 2);
assert_eq!(dirs[0].name, None);
assert_eq!(dirs[0].level, LevelFilter::Warn);
assert_eq!(dirs[1].name, Some("crate2".to_string()));
assert_eq!(dirs[1].level, LevelFilter::Debug);
assert!(filter.is_none());
}
#[test]
fn parse_spec_global_bare_warn_lc() {
// test parse_spec with no crate, in isolation, all lowercase
let (dirs, filter) = parse_spec("warn");
assert_eq!(dirs.len(), 1);
assert_eq!(dirs[0].name, None);
assert_eq!(dirs[0].level, LevelFilter::Warn);
assert!(filter.is_none());
}
#[test]
fn parse_spec_global_bare_warn_uc() {
// test parse_spec with no crate, in isolation, all uppercase
let (dirs, filter) = parse_spec("WARN");
assert_eq!(dirs.len(), 1);
assert_eq!(dirs[0].name, None);
assert_eq!(dirs[0].level, LevelFilter::Warn);
assert!(filter.is_none());
}
#[test]
fn parse_spec_global_bare_warn_mixed() {
// test parse_spec with no crate, in isolation, mixed case
let (dirs, filter) = parse_spec("wArN");
assert_eq!(dirs.len(), 1);
assert_eq!(dirs[0].name, None);
assert_eq!(dirs[0].level, LevelFilter::Warn);
assert!(filter.is_none());
}
#[test]
fn parse_spec_valid_filter() {
let (dirs, filter) = parse_spec("crate1::mod1=error,crate1::mod2,crate2=debug/abc");
assert_eq!(dirs.len(), 3);
assert_eq!(dirs[0].name, Some("crate1::mod1".to_string()));
assert_eq!(dirs[0].level, LevelFilter::Error);
assert_eq!(dirs[1].name, Some("crate1::mod2".to_string()));
assert_eq!(dirs[1].level, LevelFilter::max());
assert_eq!(dirs[2].name, Some("crate2".to_string()));
assert_eq!(dirs[2].level, LevelFilter::Debug);
assert!(filter.is_some() && filter.unwrap().to_string() == "abc");
}
#[test]
fn parse_spec_invalid_crate_filter() {
let (dirs, filter) = parse_spec("crate1::mod1=error=warn,crate2=debug/a.c");
assert_eq!(dirs.len(), 1);
assert_eq!(dirs[0].name, Some("crate2".to_string()));
assert_eq!(dirs[0].level, LevelFilter::Debug);
assert!(filter.is_some() && filter.unwrap().to_string() == "a.c");
}
#[test]
fn parse_spec_empty_with_filter() {
let (dirs, filter) = parse_spec("crate1/a*c");
assert_eq!(dirs.len(), 1);
assert_eq!(dirs[0].name, Some("crate1".to_string()));
assert_eq!(dirs[0].level, LevelFilter::max());
assert!(filter.is_some() && filter.unwrap().to_string() == "a*c");
}
}

29
third-party/vendor/env_logger/src/filter/regex.rs vendored Normal file
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@ -0,0 +1,29 @@
extern crate regex;
use std::fmt;
use self::regex::Regex;
#[derive(Debug)]
pub struct Filter {
inner: Regex,
}
impl Filter {
pub fn new(spec: &str) -> Result<Filter, String> {
match Regex::new(spec) {
Ok(r) => Ok(Filter { inner: r }),
Err(e) => Err(e.to_string()),
}
}
pub fn is_match(&self, s: &str) -> bool {
self.inner.is_match(s)
}
}
impl fmt::Display for Filter {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.inner.fmt(f)
}
}

24
third-party/vendor/env_logger/src/filter/string.rs vendored Normal file
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@ -0,0 +1,24 @@
use std::fmt;
#[derive(Debug)]
pub struct Filter {
inner: String,
}
impl Filter {
pub fn new(spec: &str) -> Result<Filter, String> {
Ok(Filter {
inner: spec.to_string(),
})
}
pub fn is_match(&self, s: &str) -> bool {
s.contains(&self.inner)
}
}
impl fmt::Display for Filter {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.inner.fmt(f)
}
}

114
third-party/vendor/env_logger/src/fmt/humantime.rs vendored Normal file
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use std::fmt;
use std::time::SystemTime;
use humantime::{
format_rfc3339_micros, format_rfc3339_millis, format_rfc3339_nanos, format_rfc3339_seconds,
};
use crate::fmt::{Formatter, TimestampPrecision};
impl Formatter {
/// Get a [`Timestamp`] for the current date and time in UTC.
///
/// # Examples
///
/// Include the current timestamp with the log record:
///
/// ```
/// use std::io::Write;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| {
/// let ts = buf.timestamp();
///
/// writeln!(buf, "{}: {}: {}", ts, record.level(), record.args())
/// });
/// ```
///
/// [`Timestamp`]: struct.Timestamp.html
pub fn timestamp(&self) -> Timestamp {
Timestamp {
time: SystemTime::now(),
precision: TimestampPrecision::Seconds,
}
}
/// Get a [`Timestamp`] for the current date and time in UTC with full
/// second precision.
pub fn timestamp_seconds(&self) -> Timestamp {
Timestamp {
time: SystemTime::now(),
precision: TimestampPrecision::Seconds,
}
}
/// Get a [`Timestamp`] for the current date and time in UTC with
/// millisecond precision.
pub fn timestamp_millis(&self) -> Timestamp {
Timestamp {
time: SystemTime::now(),
precision: TimestampPrecision::Millis,
}
}
/// Get a [`Timestamp`] for the current date and time in UTC with
/// microsecond precision.
pub fn timestamp_micros(&self) -> Timestamp {
Timestamp {
time: SystemTime::now(),
precision: TimestampPrecision::Micros,
}
}
/// Get a [`Timestamp`] for the current date and time in UTC with
/// nanosecond precision.
pub fn timestamp_nanos(&self) -> Timestamp {
Timestamp {
time: SystemTime::now(),
precision: TimestampPrecision::Nanos,
}
}
}
/// An [RFC3339] formatted timestamp.
///
/// The timestamp implements [`Display`] and can be written to a [`Formatter`].
///
/// [RFC3339]: https://www.ietf.org/rfc/rfc3339.txt
/// [`Display`]: https://doc.rust-lang.org/stable/std/fmt/trait.Display.html
/// [`Formatter`]: struct.Formatter.html
pub struct Timestamp {
time: SystemTime,
precision: TimestampPrecision,
}
impl fmt::Debug for Timestamp {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
/// A `Debug` wrapper for `Timestamp` that uses the `Display` implementation.
struct TimestampValue<'a>(&'a Timestamp);
impl<'a> fmt::Debug for TimestampValue<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(&self.0, f)
}
}
f.debug_tuple("Timestamp")
.field(&TimestampValue(self))
.finish()
}
}
impl fmt::Display for Timestamp {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let formatter = match self.precision {
TimestampPrecision::Seconds => format_rfc3339_seconds,
TimestampPrecision::Millis => format_rfc3339_millis,
TimestampPrecision::Micros => format_rfc3339_micros,
TimestampPrecision::Nanos => format_rfc3339_nanos,
};
formatter(self.time).fmt(f)
}
}

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//! Formatting for log records.
//!
//! This module contains a [`Formatter`] that can be used to format log records
//! into without needing temporary allocations. Usually you won't need to worry
//! about the contents of this module and can use the `Formatter` like an ordinary
//! [`Write`].
//!
//! # Formatting log records
//!
//! The format used to print log records can be customised using the [`Builder::format`]
//! method.
//! Custom formats can apply different color and weight to printed values using
//! [`Style`] builders.
//!
//! ```
//! use std::io::Write;
//!
//! let mut builder = env_logger::Builder::new();
//!
//! builder.format(|buf, record| {
//! writeln!(buf, "{}: {}",
//! record.level(),
//! record.args())
//! });
//! ```
//!
//! [`Formatter`]: struct.Formatter.html
//! [`Style`]: struct.Style.html
//! [`Builder::format`]: ../struct.Builder.html#method.format
//! [`Write`]: https://doc.rust-lang.org/stable/std/io/trait.Write.html
use std::cell::RefCell;
use std::fmt::Display;
use std::io::prelude::*;
use std::rc::Rc;
use std::{fmt, io, mem};
#[cfg(feature = "color")]
use log::Level;
use log::Record;
#[cfg(feature = "humantime")]
mod humantime;
pub(crate) mod writer;
#[cfg(feature = "color")]
mod style;
#[cfg(feature = "color")]
pub use style::{Color, Style, StyledValue};
#[cfg(feature = "humantime")]
pub use self::humantime::Timestamp;
pub use self::writer::glob::*;
use self::writer::{Buffer, Writer};
pub(crate) mod glob {
pub use super::{Target, TimestampPrecision, WriteStyle};
}
/// Formatting precision of timestamps.
///
/// Seconds give precision of full seconds, milliseconds give thousands of a
/// second (3 decimal digits), microseconds are millionth of a second (6 decimal
/// digits) and nanoseconds are billionth of a second (9 decimal digits).
#[derive(Copy, Clone, Debug)]
pub enum TimestampPrecision {
/// Full second precision (0 decimal digits)
Seconds,
/// Millisecond precision (3 decimal digits)
Millis,
/// Microsecond precision (6 decimal digits)
Micros,
/// Nanosecond precision (9 decimal digits)
Nanos,
}
/// The default timestamp precision is seconds.
impl Default for TimestampPrecision {
fn default() -> Self {
TimestampPrecision::Seconds
}
}
/// A formatter to write logs into.
///
/// `Formatter` implements the standard [`Write`] trait for writing log records.
/// It also supports terminal colors, through the [`style`] method.
///
/// # Examples
///
/// Use the [`writeln`] macro to format a log record.
/// An instance of a `Formatter` is passed to an `env_logger` format as `buf`:
///
/// ```
/// use std::io::Write;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| writeln!(buf, "{}: {}", record.level(), record.args()));
/// ```
///
/// [`Write`]: https://doc.rust-lang.org/stable/std/io/trait.Write.html
/// [`writeln`]: https://doc.rust-lang.org/stable/std/macro.writeln.html
/// [`style`]: #method.style
pub struct Formatter {
buf: Rc<RefCell<Buffer>>,
write_style: WriteStyle,
}
impl Formatter {
pub(crate) fn new(writer: &Writer) -> Self {
Formatter {
buf: Rc::new(RefCell::new(writer.buffer())),
write_style: writer.write_style(),
}
}
pub(crate) fn write_style(&self) -> WriteStyle {
self.write_style
}
pub(crate) fn print(&self, writer: &Writer) -> io::Result<()> {
writer.print(&self.buf.borrow())
}
pub(crate) fn clear(&mut self) {
self.buf.borrow_mut().clear()
}
}
#[cfg(feature = "color")]
impl Formatter {
/// Begin a new [`Style`].
///
/// # Examples
///
/// Create a bold, red colored style and use it to print the log level:
///
/// ```
/// use std::io::Write;
/// use env_logger::fmt::Color;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| {
/// let mut level_style = buf.style();
///
/// level_style.set_color(Color::Red).set_bold(true);
///
/// writeln!(buf, "{}: {}",
/// level_style.value(record.level()),
/// record.args())
/// });
/// ```
///
/// [`Style`]: struct.Style.html
pub fn style(&self) -> Style {
Style {
buf: self.buf.clone(),
spec: termcolor::ColorSpec::new(),
}
}
/// Get the default [`Style`] for the given level.
///
/// The style can be used to print other values besides the level.
pub fn default_level_style(&self, level: Level) -> Style {
let mut level_style = self.style();
match level {
Level::Trace => level_style.set_color(Color::Cyan),
Level::Debug => level_style.set_color(Color::Blue),
Level::Info => level_style.set_color(Color::Green),
Level::Warn => level_style.set_color(Color::Yellow),
Level::Error => level_style.set_color(Color::Red).set_bold(true),
};
level_style
}
/// Get a printable [`Style`] for the given level.
///
/// The style can only be used to print the level.
pub fn default_styled_level(&self, level: Level) -> StyledValue<'static, Level> {
self.default_level_style(level).into_value(level)
}
}
impl Write for Formatter {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
self.buf.borrow_mut().write(buf)
}
fn flush(&mut self) -> io::Result<()> {
self.buf.borrow_mut().flush()
}
}
impl fmt::Debug for Formatter {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("Formatter").finish()
}
}
pub(crate) type FormatFn = Box<dyn Fn(&mut Formatter, &Record) -> io::Result<()> + Sync + Send>;
pub(crate) struct Builder {
pub format_timestamp: Option<TimestampPrecision>,
pub format_module_path: bool,
pub format_target: bool,
pub format_level: bool,
pub format_indent: Option<usize>,
pub custom_format: Option<FormatFn>,
pub format_suffix: &'static str,
built: bool,
}
impl Builder {
/// Convert the format into a callable function.
///
/// If the `custom_format` is `Some`, then any `default_format` switches are ignored.
/// If the `custom_format` is `None`, then a default format is returned.
/// Any `default_format` switches set to `false` won't be written by the format.
pub fn build(&mut self) -> FormatFn {
assert!(!self.built, "attempt to re-use consumed builder");
let built = mem::replace(
self,
Builder {
built: true,
..Default::default()
},
);
if let Some(fmt) = built.custom_format {
fmt
} else {
Box::new(move |buf, record| {
let fmt = DefaultFormat {
timestamp: built.format_timestamp,
module_path: built.format_module_path,
target: built.format_target,
level: built.format_level,
written_header_value: false,
indent: built.format_indent,
suffix: built.format_suffix,
buf,
};
fmt.write(record)
})
}
}
}
impl Default for Builder {
fn default() -> Self {
Builder {
format_timestamp: Some(Default::default()),
format_module_path: false,
format_target: true,
format_level: true,
format_indent: Some(4),
custom_format: None,
format_suffix: "\n",
built: false,
}
}
}
#[cfg(feature = "color")]
type SubtleStyle = StyledValue<'static, &'static str>;
#[cfg(not(feature = "color"))]
type SubtleStyle = &'static str;
/// The default format.
///
/// This format needs to work with any combination of crate features.
struct DefaultFormat<'a> {
timestamp: Option<TimestampPrecision>,
module_path: bool,
target: bool,
level: bool,
written_header_value: bool,
indent: Option<usize>,
buf: &'a mut Formatter,
suffix: &'a str,
}
impl<'a> DefaultFormat<'a> {
fn write(mut self, record: &Record) -> io::Result<()> {
self.write_timestamp()?;
self.write_level(record)?;
self.write_module_path(record)?;
self.write_target(record)?;
self.finish_header()?;
self.write_args(record)
}
fn subtle_style(&self, text: &'static str) -> SubtleStyle {
#[cfg(feature = "color")]
{
self.buf
.style()
.set_color(Color::Black)
.set_intense(true)
.clone()
.into_value(text)
}
#[cfg(not(feature = "color"))]
{
text
}
}
fn write_header_value<T>(&mut self, value: T) -> io::Result<()>
where
T: Display,
{
if !self.written_header_value {
self.written_header_value = true;
let open_brace = self.subtle_style("[");
write!(self.buf, "{}{}", open_brace, value)
} else {
write!(self.buf, " {}", value)
}
}
fn write_level(&mut self, record: &Record) -> io::Result<()> {
if !self.level {
return Ok(());
}
let level = {
#[cfg(feature = "color")]
{
self.buf.default_styled_level(record.level())
}
#[cfg(not(feature = "color"))]
{
record.level()
}
};
self.write_header_value(format_args!("{:<5}", level))
}
fn write_timestamp(&mut self) -> io::Result<()> {
#[cfg(feature = "humantime")]
{
use self::TimestampPrecision::*;
let ts = match self.timestamp {
None => return Ok(()),
Some(Seconds) => self.buf.timestamp_seconds(),
Some(Millis) => self.buf.timestamp_millis(),
Some(Micros) => self.buf.timestamp_micros(),
Some(Nanos) => self.buf.timestamp_nanos(),
};
self.write_header_value(ts)
}
#[cfg(not(feature = "humantime"))]
{
// Trick the compiler to think we have used self.timestamp
// Workaround for "field is never used: `timestamp`" compiler nag.
let _ = self.timestamp;
Ok(())
}
}
fn write_module_path(&mut self, record: &Record) -> io::Result<()> {
if !self.module_path {
return Ok(());
}
if let Some(module_path) = record.module_path() {
self.write_header_value(module_path)
} else {
Ok(())
}
}
fn write_target(&mut self, record: &Record) -> io::Result<()> {
if !self.target {
return Ok(());
}
match record.target() {
"" => Ok(()),
target => self.write_header_value(target),
}
}
fn finish_header(&mut self) -> io::Result<()> {
if self.written_header_value {
let close_brace = self.subtle_style("]");
write!(self.buf, "{} ", close_brace)
} else {
Ok(())
}
}
fn write_args(&mut self, record: &Record) -> io::Result<()> {
match self.indent {
// Fast path for no indentation
None => write!(self.buf, "{}{}", record.args(), self.suffix),
Some(indent_count) => {
// Create a wrapper around the buffer only if we have to actually indent the message
struct IndentWrapper<'a, 'b: 'a> {
fmt: &'a mut DefaultFormat<'b>,
indent_count: usize,
}
impl<'a, 'b> Write for IndentWrapper<'a, 'b> {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
let mut first = true;
for chunk in buf.split(|&x| x == b'\n') {
if !first {
write!(
self.fmt.buf,
"{}{:width$}",
self.fmt.suffix,
"",
width = self.indent_count
)?;
}
self.fmt.buf.write_all(chunk)?;
first = false;
}
Ok(buf.len())
}
fn flush(&mut self) -> io::Result<()> {
self.fmt.buf.flush()
}
}
// The explicit scope here is just to make older versions of Rust happy
{
let mut wrapper = IndentWrapper {
fmt: self,
indent_count,
};
write!(wrapper, "{}", record.args())?;
}
write!(self.buf, "{}", self.suffix)?;
Ok(())
}
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use log::{Level, Record};
fn write_record(record: Record, fmt: DefaultFormat) -> String {
let buf = fmt.buf.buf.clone();
fmt.write(&record).expect("failed to write record");
let buf = buf.borrow();
String::from_utf8(buf.as_bytes().to_vec()).expect("failed to read record")
}
fn write_target(target: &str, fmt: DefaultFormat) -> String {
write_record(
Record::builder()
.args(format_args!("log\nmessage"))
.level(Level::Info)
.file(Some("test.rs"))
.line(Some(144))
.module_path(Some("test::path"))
.target(target)
.build(),
fmt,
)
}
fn write(fmt: DefaultFormat) -> String {
write_target("", fmt)
}
#[test]
fn format_with_header() {
let writer = writer::Builder::new()
.write_style(WriteStyle::Never)
.build();
let mut f = Formatter::new(&writer);
let written = write(DefaultFormat {
timestamp: None,
module_path: true,
target: false,
level: true,
written_header_value: false,
indent: None,
suffix: "\n",
buf: &mut f,
});
assert_eq!("[INFO test::path] log\nmessage\n", written);
}
#[test]
fn format_no_header() {
let writer = writer::Builder::new()
.write_style(WriteStyle::Never)
.build();
let mut f = Formatter::new(&writer);
let written = write(DefaultFormat {
timestamp: None,
module_path: false,
target: false,
level: false,
written_header_value: false,
indent: None,
suffix: "\n",
buf: &mut f,
});
assert_eq!("log\nmessage\n", written);
}
#[test]
fn format_indent_spaces() {
let writer = writer::Builder::new()
.write_style(WriteStyle::Never)
.build();
let mut f = Formatter::new(&writer);
let written = write(DefaultFormat {
timestamp: None,
module_path: true,
target: false,
level: true,
written_header_value: false,
indent: Some(4),
suffix: "\n",
buf: &mut f,
});
assert_eq!("[INFO test::path] log\n message\n", written);
}
#[test]
fn format_indent_zero_spaces() {
let writer = writer::Builder::new()
.write_style(WriteStyle::Never)
.build();
let mut f = Formatter::new(&writer);
let written = write(DefaultFormat {
timestamp: None,
module_path: true,
target: false,
level: true,
written_header_value: false,
indent: Some(0),
suffix: "\n",
buf: &mut f,
});
assert_eq!("[INFO test::path] log\nmessage\n", written);
}
#[test]
fn format_indent_spaces_no_header() {
let writer = writer::Builder::new()
.write_style(WriteStyle::Never)
.build();
let mut f = Formatter::new(&writer);
let written = write(DefaultFormat {
timestamp: None,
module_path: false,
target: false,
level: false,
written_header_value: false,
indent: Some(4),
suffix: "\n",
buf: &mut f,
});
assert_eq!("log\n message\n", written);
}
#[test]
fn format_suffix() {
let writer = writer::Builder::new()
.write_style(WriteStyle::Never)
.build();
let mut f = Formatter::new(&writer);
let written = write(DefaultFormat {
timestamp: None,
module_path: false,
target: false,
level: false,
written_header_value: false,
indent: None,
suffix: "\n\n",
buf: &mut f,
});
assert_eq!("log\nmessage\n\n", written);
}
#[test]
fn format_suffix_with_indent() {
let writer = writer::Builder::new()
.write_style(WriteStyle::Never)
.build();
let mut f = Formatter::new(&writer);
let written = write(DefaultFormat {
timestamp: None,
module_path: false,
target: false,
level: false,
written_header_value: false,
indent: Some(4),
suffix: "\n\n",
buf: &mut f,
});
assert_eq!("log\n\n message\n\n", written);
}
#[test]
fn format_target() {
let writer = writer::Builder::new()
.write_style(WriteStyle::Never)
.build();
let mut f = Formatter::new(&writer);
let written = write_target(
"target",
DefaultFormat {
timestamp: None,
module_path: true,
target: true,
level: true,
written_header_value: false,
indent: None,
suffix: "\n",
buf: &mut f,
},
);
assert_eq!("[INFO test::path target] log\nmessage\n", written);
}
#[test]
fn format_empty_target() {
let writer = writer::Builder::new()
.write_style(WriteStyle::Never)
.build();
let mut f = Formatter::new(&writer);
let written = write(DefaultFormat {
timestamp: None,
module_path: true,
target: true,
level: true,
written_header_value: false,
indent: None,
suffix: "\n",
buf: &mut f,
});
assert_eq!("[INFO test::path] log\nmessage\n", written);
}
#[test]
fn format_no_target() {
let writer = writer::Builder::new()
.write_style(WriteStyle::Never)
.build();
let mut f = Formatter::new(&writer);
let written = write_target(
"target",
DefaultFormat {
timestamp: None,
module_path: true,
target: false,
level: true,
written_header_value: false,
indent: None,
suffix: "\n",
buf: &mut f,
},
);
assert_eq!("[INFO test::path] log\nmessage\n", written);
}
}

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third-party/vendor/env_logger/src/fmt/style.rs vendored Normal file
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use std::borrow::Cow;
use std::cell::RefCell;
use std::fmt;
use std::rc::Rc;
use super::Buffer;
/// A set of styles to apply to the terminal output.
///
/// Call [`Formatter::style`] to get a `Style` and use the builder methods to
/// set styling properties, like [color] and [weight].
/// To print a value using the style, wrap it in a call to [`value`] when the log
/// record is formatted.
///
/// # Examples
///
/// Create a bold, red colored style and use it to print the log level:
///
/// ```
/// use std::io::Write;
/// use env_logger::fmt::Color;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| {
/// let mut level_style = buf.style();
///
/// level_style.set_color(Color::Red).set_bold(true);
///
/// writeln!(buf, "{}: {}",
/// level_style.value(record.level()),
/// record.args())
/// });
/// ```
///
/// Styles can be re-used to output multiple values:
///
/// ```
/// use std::io::Write;
/// use env_logger::fmt::Color;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| {
/// let mut bold = buf.style();
///
/// bold.set_bold(true);
///
/// writeln!(buf, "{}: {} {}",
/// bold.value(record.level()),
/// bold.value("some bold text"),
/// record.args())
/// });
/// ```
///
/// [`Formatter::style`]: struct.Formatter.html#method.style
/// [color]: #method.set_color
/// [weight]: #method.set_bold
/// [`value`]: #method.value
#[derive(Clone)]
pub struct Style {
pub(in crate::fmt) buf: Rc<RefCell<Buffer>>,
pub(in crate::fmt) spec: termcolor::ColorSpec,
}
impl Style {
/// Set the text color.
///
/// # Examples
///
/// Create a style with red text:
///
/// ```
/// use std::io::Write;
/// use env_logger::fmt::Color;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| {
/// let mut style = buf.style();
///
/// style.set_color(Color::Red);
///
/// writeln!(buf, "{}", style.value(record.args()))
/// });
/// ```
pub fn set_color(&mut self, color: Color) -> &mut Style {
self.spec.set_fg(Some(color.into_termcolor()));
self
}
/// Set the text weight.
///
/// If `yes` is true then text will be written in bold.
/// If `yes` is false then text will be written in the default weight.
///
/// # Examples
///
/// Create a style with bold text:
///
/// ```
/// use std::io::Write;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| {
/// let mut style = buf.style();
///
/// style.set_bold(true);
///
/// writeln!(buf, "{}", style.value(record.args()))
/// });
/// ```
pub fn set_bold(&mut self, yes: bool) -> &mut Style {
self.spec.set_bold(yes);
self
}
/// Set the text intensity.
///
/// If `yes` is true then text will be written in a brighter color.
/// If `yes` is false then text will be written in the default color.
///
/// # Examples
///
/// Create a style with intense text:
///
/// ```
/// use std::io::Write;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| {
/// let mut style = buf.style();
///
/// style.set_intense(true);
///
/// writeln!(buf, "{}", style.value(record.args()))
/// });
/// ```
pub fn set_intense(&mut self, yes: bool) -> &mut Style {
self.spec.set_intense(yes);
self
}
/// Set whether the text is dimmed.
///
/// If `yes` is true then text will be written in a dimmer color.
/// If `yes` is false then text will be written in the default color.
///
/// # Examples
///
/// Create a style with dimmed text:
///
/// ```
/// use std::io::Write;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| {
/// let mut style = buf.style();
///
/// style.set_dimmed(true);
///
/// writeln!(buf, "{}", style.value(record.args()))
/// });
/// ```
pub fn set_dimmed(&mut self, yes: bool) -> &mut Style {
self.spec.set_dimmed(yes);
self
}
/// Set the background color.
///
/// # Examples
///
/// Create a style with a yellow background:
///
/// ```
/// use std::io::Write;
/// use env_logger::fmt::Color;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| {
/// let mut style = buf.style();
///
/// style.set_bg(Color::Yellow);
///
/// writeln!(buf, "{}", style.value(record.args()))
/// });
/// ```
pub fn set_bg(&mut self, color: Color) -> &mut Style {
self.spec.set_bg(Some(color.into_termcolor()));
self
}
/// Wrap a value in the style.
///
/// The same `Style` can be used to print multiple different values.
///
/// # Examples
///
/// Create a bold, red colored style and use it to print the log level:
///
/// ```
/// use std::io::Write;
/// use env_logger::fmt::Color;
///
/// let mut builder = env_logger::Builder::new();
///
/// builder.format(|buf, record| {
/// let mut style = buf.style();
///
/// style.set_color(Color::Red).set_bold(true);
///
/// writeln!(buf, "{}: {}",
/// style.value(record.level()),
/// record.args())
/// });
/// ```
pub fn value<T>(&self, value: T) -> StyledValue<T> {
StyledValue {
style: Cow::Borrowed(self),
value,
}
}
/// Wrap a value in the style by taking ownership of it.
pub(crate) fn into_value<T>(self, value: T) -> StyledValue<'static, T> {
StyledValue {
style: Cow::Owned(self),
value,
}
}
}
impl fmt::Debug for Style {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("Style").field("spec", &self.spec).finish()
}
}
/// A value that can be printed using the given styles.
///
/// It is the result of calling [`Style::value`].
///
/// [`Style::value`]: struct.Style.html#method.value
pub struct StyledValue<'a, T> {
style: Cow<'a, Style>,
value: T,
}
impl<'a, T> StyledValue<'a, T> {
fn write_fmt<F>(&self, f: F) -> fmt::Result
where
F: FnOnce() -> fmt::Result,
{
self.style
.buf
.borrow_mut()
.set_color(&self.style.spec)
.map_err(|_| fmt::Error)?;
// Always try to reset the terminal style, even if writing failed
let write = f();
let reset = self.style.buf.borrow_mut().reset().map_err(|_| fmt::Error);
write.and(reset)
}
}
macro_rules! impl_styled_value_fmt {
($($fmt_trait:path),*) => {
$(
impl<'a, T: $fmt_trait> $fmt_trait for StyledValue<'a, T> {
fn fmt(&self, f: &mut fmt::Formatter)->fmt::Result {
self.write_fmt(|| T::fmt(&self.value, f))
}
}
)*
};
}
impl_styled_value_fmt!(
fmt::Debug,
fmt::Display,
fmt::Pointer,
fmt::Octal,
fmt::Binary,
fmt::UpperHex,
fmt::LowerHex,
fmt::UpperExp,
fmt::LowerExp
);
// The `Color` type is copied from https://github.com/BurntSushi/termcolor
/// The set of available colors for the terminal foreground/background.
///
/// The `Ansi256` and `Rgb` colors will only output the correct codes when
/// paired with the `Ansi` `WriteColor` implementation.
///
/// The `Ansi256` and `Rgb` color types are not supported when writing colors
/// on Windows using the console. If they are used on Windows, then they are
/// silently ignored and no colors will be emitted.
///
/// This set may expand over time.
///
/// This type has a `FromStr` impl that can parse colors from their human
/// readable form. The format is as follows:
///
/// 1. Any of the explicitly listed colors in English. They are matched
/// case insensitively.
/// 2. A single 8-bit integer, in either decimal or hexadecimal format.
/// 3. A triple of 8-bit integers separated by a comma, where each integer is
/// in decimal or hexadecimal format.
///
/// Hexadecimal numbers are written with a `0x` prefix.
#[allow(missing_docs)]
#[non_exhaustive]
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum Color {
Black,
Blue,
Green,
Red,
Cyan,
Magenta,
Yellow,
White,
Ansi256(u8),
Rgb(u8, u8, u8),
}
impl Color {
fn into_termcolor(self) -> termcolor::Color {
match self {
Color::Black => termcolor::Color::Black,
Color::Blue => termcolor::Color::Blue,
Color::Green => termcolor::Color::Green,
Color::Red => termcolor::Color::Red,
Color::Cyan => termcolor::Color::Cyan,
Color::Magenta => termcolor::Color::Magenta,
Color::Yellow => termcolor::Color::Yellow,
Color::White => termcolor::Color::White,
Color::Ansi256(value) => termcolor::Color::Ansi256(value),
Color::Rgb(r, g, b) => termcolor::Color::Rgb(r, g, b),
}
}
}

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third-party/vendor/env_logger/src/fmt/writer/atty.rs vendored Normal file
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/*
This internal module contains the terminal detection implementation.
If the `auto-color` feature is enabled then we detect whether we're attached to a particular TTY.
Otherwise, assume we're not attached to anything. This effectively prevents styles from being
printed.
*/
#[cfg(feature = "auto-color")]
mod imp {
use is_terminal::IsTerminal;
pub(in crate::fmt) fn is_stdout() -> bool {
std::io::stdout().is_terminal()
}
pub(in crate::fmt) fn is_stderr() -> bool {
std::io::stderr().is_terminal()
}
}
#[cfg(not(feature = "auto-color"))]
mod imp {
pub(in crate::fmt) fn is_stdout() -> bool {
false
}
pub(in crate::fmt) fn is_stderr() -> bool {
false
}
}
pub(in crate::fmt) use self::imp::*;

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/*
This internal module contains the style and terminal writing implementation.
Its public API is available when the `termcolor` crate is available.
The terminal printing is shimmed when the `termcolor` crate is not available.
*/
#[cfg(feature = "color")]
mod termcolor;
#[cfg(feature = "color")]
pub(in crate::fmt) use self::termcolor::*;
#[cfg(not(feature = "color"))]
mod plain;
#[cfg(not(feature = "color"))]
pub(in crate::fmt) use plain::*;

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use std::{io, sync::Mutex};
use crate::fmt::{WritableTarget, WriteStyle};
pub(in crate::fmt::writer) struct BufferWriter {
target: WritableTarget,
}
impl BufferWriter {
pub(in crate::fmt::writer) fn stderr(is_test: bool, _write_style: WriteStyle) -> Self {
BufferWriter {
target: if is_test {
WritableTarget::PrintStderr
} else {
WritableTarget::WriteStderr
},
}
}
pub(in crate::fmt::writer) fn stdout(is_test: bool, _write_style: WriteStyle) -> Self {
BufferWriter {
target: if is_test {
WritableTarget::PrintStdout
} else {
WritableTarget::WriteStdout
},
}
}
pub(in crate::fmt::writer) fn pipe(pipe: Box<Mutex<dyn io::Write + Send + 'static>>) -> Self {
BufferWriter {
target: WritableTarget::Pipe(pipe),
}
}
pub(in crate::fmt::writer) fn write_style(&self) -> WriteStyle {
WriteStyle::Never
}
pub(in crate::fmt::writer) fn buffer(&self) -> Buffer {
Buffer(Vec::new())
}
pub(in crate::fmt::writer) fn print(&self, buf: &Buffer) -> io::Result<()> {
self.target.print(buf)
}
}
pub(in crate::fmt) struct Buffer(Vec<u8>);
impl Buffer {
pub(in crate::fmt) fn clear(&mut self) {
self.0.clear();
}
pub(in crate::fmt) fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
self.0.extend(buf);
Ok(buf.len())
}
pub(in crate::fmt) fn flush(&mut self) -> io::Result<()> {
Ok(())
}
pub(in crate::fmt) fn as_bytes(&self) -> &[u8] {
&self.0
}
}

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use std::io::{self, Write};
use std::sync::Mutex;
use termcolor::{self, ColorSpec, WriteColor};
use crate::fmt::{WritableTarget, WriteStyle};
pub(in crate::fmt::writer) struct BufferWriter {
inner: termcolor::BufferWriter,
uncolored_target: Option<WritableTarget>,
write_style: WriteStyle,
}
impl BufferWriter {
pub(in crate::fmt::writer) fn stderr(is_test: bool, write_style: WriteStyle) -> Self {
BufferWriter {
inner: termcolor::BufferWriter::stderr(write_style.into_color_choice()),
uncolored_target: if is_test {
Some(WritableTarget::PrintStderr)
} else {
None
},
write_style,
}
}
pub(in crate::fmt::writer) fn stdout(is_test: bool, write_style: WriteStyle) -> Self {
BufferWriter {
inner: termcolor::BufferWriter::stdout(write_style.into_color_choice()),
uncolored_target: if is_test {
Some(WritableTarget::PrintStdout)
} else {
None
},
write_style,
}
}
pub(in crate::fmt::writer) fn pipe(pipe: Box<Mutex<dyn io::Write + Send + 'static>>) -> Self {
let write_style = WriteStyle::Never;
BufferWriter {
// The inner Buffer is never printed from, but it is still needed to handle coloring and other formatting
inner: termcolor::BufferWriter::stderr(write_style.into_color_choice()),
uncolored_target: Some(WritableTarget::Pipe(pipe)),
write_style,
}
}
pub(in crate::fmt::writer) fn write_style(&self) -> WriteStyle {
self.write_style
}
pub(in crate::fmt::writer) fn buffer(&self) -> Buffer {
Buffer {
inner: self.inner.buffer(),
has_uncolored_target: self.uncolored_target.is_some(),
}
}
pub(in crate::fmt::writer) fn print(&self, buf: &Buffer) -> io::Result<()> {
if let Some(target) = &self.uncolored_target {
target.print(buf)
} else {
self.inner.print(&buf.inner)
}
}
}
pub(in crate::fmt) struct Buffer {
inner: termcolor::Buffer,
has_uncolored_target: bool,
}
impl Buffer {
pub(in crate::fmt) fn clear(&mut self) {
self.inner.clear()
}
pub(in crate::fmt) fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
self.inner.write(buf)
}
pub(in crate::fmt) fn flush(&mut self) -> io::Result<()> {
self.inner.flush()
}
pub(in crate::fmt) fn as_bytes(&self) -> &[u8] {
self.inner.as_slice()
}
pub(in crate::fmt) fn set_color(&mut self, spec: &ColorSpec) -> io::Result<()> {
// Ignore styles for test captured logs because they can't be printed
if !self.has_uncolored_target {
self.inner.set_color(spec)
} else {
Ok(())
}
}
pub(in crate::fmt) fn reset(&mut self) -> io::Result<()> {
// Ignore styles for test captured logs because they can't be printed
if !self.has_uncolored_target {
self.inner.reset()
} else {
Ok(())
}
}
}

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mod atty;
mod buffer;
use self::atty::{is_stderr, is_stdout};
use self::buffer::BufferWriter;
use std::{fmt, io, mem, sync::Mutex};
pub(super) mod glob {
pub use super::*;
}
pub(super) use self::buffer::Buffer;
/// Log target, either `stdout`, `stderr` or a custom pipe.
#[non_exhaustive]
pub enum Target {
/// Logs will be sent to standard output.
Stdout,
/// Logs will be sent to standard error.
Stderr,
/// Logs will be sent to a custom pipe.
Pipe(Box<dyn io::Write + Send + 'static>),
}
impl Default for Target {
fn default() -> Self {
Target::Stderr
}
}
impl fmt::Debug for Target {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"{}",
match self {
Self::Stdout => "stdout",
Self::Stderr => "stderr",
Self::Pipe(_) => "pipe",
}
)
}
}
/// Log target, either `stdout`, `stderr` or a custom pipe.
///
/// Same as `Target`, except the pipe is wrapped in a mutex for interior mutability.
pub(super) enum WritableTarget {
/// Logs will be written to standard output.
#[allow(dead_code)]
WriteStdout,
/// Logs will be printed to standard output.
PrintStdout,
/// Logs will be written to standard error.
#[allow(dead_code)]
WriteStderr,
/// Logs will be printed to standard error.
PrintStderr,
/// Logs will be sent to a custom pipe.
Pipe(Box<Mutex<dyn io::Write + Send + 'static>>),
}
impl WritableTarget {
fn print(&self, buf: &Buffer) -> io::Result<()> {
use std::io::Write as _;
let buf = buf.as_bytes();
match self {
WritableTarget::WriteStdout => {
let stream = std::io::stdout();
let mut stream = stream.lock();
stream.write_all(buf)?;
stream.flush()?;
}
WritableTarget::PrintStdout => print!("{}", String::from_utf8_lossy(buf)),
WritableTarget::WriteStderr => {
let stream = std::io::stderr();
let mut stream = stream.lock();
stream.write_all(buf)?;
stream.flush()?;
}
WritableTarget::PrintStderr => eprint!("{}", String::from_utf8_lossy(buf)),
// Safety: If the target type is `Pipe`, `target_pipe` will always be non-empty.
WritableTarget::Pipe(pipe) => {
let mut stream = pipe.lock().unwrap();
stream.write_all(buf)?;
stream.flush()?;
}
}
Ok(())
}
}
impl fmt::Debug for WritableTarget {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"{}",
match self {
Self::WriteStdout => "stdout",
Self::PrintStdout => "stdout",
Self::WriteStderr => "stderr",
Self::PrintStderr => "stderr",
Self::Pipe(_) => "pipe",
}
)
}
}
/// Whether or not to print styles to the target.
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
pub enum WriteStyle {
/// Try to print styles, but don't force the issue.
Auto,
/// Try very hard to print styles.
Always,
/// Never print styles.
Never,
}
impl Default for WriteStyle {
fn default() -> Self {
WriteStyle::Auto
}
}
#[cfg(feature = "color")]
impl WriteStyle {
fn into_color_choice(self) -> ::termcolor::ColorChoice {
match self {
WriteStyle::Always => ::termcolor::ColorChoice::Always,
WriteStyle::Auto => ::termcolor::ColorChoice::Auto,
WriteStyle::Never => ::termcolor::ColorChoice::Never,
}
}
}
/// A terminal target with color awareness.
pub(crate) struct Writer {
inner: BufferWriter,
}
impl Writer {
pub fn write_style(&self) -> WriteStyle {
self.inner.write_style()
}
pub(super) fn buffer(&self) -> Buffer {
self.inner.buffer()
}
pub(super) fn print(&self, buf: &Buffer) -> io::Result<()> {
self.inner.print(buf)
}
}
impl fmt::Debug for Writer {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("Writer").finish()
}
}
/// A builder for a terminal writer.
///
/// The target and style choice can be configured before building.
#[derive(Debug)]
pub(crate) struct Builder {
target: Target,
write_style: WriteStyle,
is_test: bool,
built: bool,
}
impl Builder {
/// Initialize the writer builder with defaults.
pub(crate) fn new() -> Self {
Builder {
target: Default::default(),
write_style: Default::default(),
is_test: false,
built: false,
}
}
/// Set the target to write to.
pub(crate) fn target(&mut self, target: Target) -> &mut Self {
self.target = target;
self
}
/// Parses a style choice string.
///
/// See the [Disabling colors] section for more details.
///
/// [Disabling colors]: ../index.html#disabling-colors
pub(crate) fn parse_write_style(&mut self, write_style: &str) -> &mut Self {
self.write_style(parse_write_style(write_style))
}
/// Whether or not to print style characters when writing.
pub(crate) fn write_style(&mut self, write_style: WriteStyle) -> &mut Self {
self.write_style = write_style;
self
}
/// Whether or not to capture logs for `cargo test`.
#[allow(clippy::wrong_self_convention)]
pub(crate) fn is_test(&mut self, is_test: bool) -> &mut Self {
self.is_test = is_test;
self
}
/// Build a terminal writer.
pub(crate) fn build(&mut self) -> Writer {
assert!(!self.built, "attempt to re-use consumed builder");
self.built = true;
let color_choice = match self.write_style {
WriteStyle::Auto => {
if match &self.target {
Target::Stderr => is_stderr(),
Target::Stdout => is_stdout(),
Target::Pipe(_) => false,
} {
WriteStyle::Auto
} else {
WriteStyle::Never
}
}
color_choice => color_choice,
};
let color_choice = if self.is_test {
WriteStyle::Never
} else {
color_choice
};
let writer = match mem::take(&mut self.target) {
Target::Stderr => BufferWriter::stderr(self.is_test, color_choice),
Target::Stdout => BufferWriter::stdout(self.is_test, color_choice),
Target::Pipe(pipe) => BufferWriter::pipe(Box::new(Mutex::new(pipe))),
};
Writer { inner: writer }
}
}
impl Default for Builder {
fn default() -> Self {
Builder::new()
}
}
fn parse_write_style(spec: &str) -> WriteStyle {
match spec {
"auto" => WriteStyle::Auto,
"always" => WriteStyle::Always,
"never" => WriteStyle::Never,
_ => Default::default(),
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn parse_write_style_valid() {
let inputs = vec![
("auto", WriteStyle::Auto),
("always", WriteStyle::Always),
("never", WriteStyle::Never),
];
for (input, expected) in inputs {
assert_eq!(expected, parse_write_style(input));
}
}
#[test]
fn parse_write_style_invalid() {
let inputs = vec!["", "true", "false", "NEVER!!"];
for input in inputs {
assert_eq!(WriteStyle::Auto, parse_write_style(input));
}
}
}

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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! A simple logger that can be configured via environment variables, for use
//! with the logging facade exposed by the [`log` crate][log-crate-url].
//!
//! Despite having "env" in its name, **`env_logger`** can also be configured by
//! other means besides environment variables. See [the examples][gh-repo-examples]
//! in the source repository for more approaches.
//!
//! By default, `env_logger` writes logs to `stderr`, but can be configured to
//! instead write them to `stdout`.
//!
//! ## Example
//!
//! ```
//! use log::{debug, error, log_enabled, info, Level};
//!
//! env_logger::init();
//!
//! debug!("this is a debug {}", "message");
//! error!("this is printed by default");
//!
//! if log_enabled!(Level::Info) {
//! let x = 3 * 4; // expensive computation
//! info!("the answer was: {}", x);
//! }
//! ```
//!
//! Assumes the binary is `main`:
//!
//! ```{.bash}
//! $ RUST_LOG=error ./main
//! [2017-11-09T02:12:24Z ERROR main] this is printed by default
//! ```
//!
//! ```{.bash}
//! $ RUST_LOG=info ./main
//! [2017-11-09T02:12:24Z ERROR main] this is printed by default
//! [2017-11-09T02:12:24Z INFO main] the answer was: 12
//! ```
//!
//! ```{.bash}
//! $ RUST_LOG=debug ./main
//! [2017-11-09T02:12:24Z DEBUG main] this is a debug message
//! [2017-11-09T02:12:24Z ERROR main] this is printed by default
//! [2017-11-09T02:12:24Z INFO main] the answer was: 12
//! ```
//!
//! You can also set the log level on a per module basis:
//!
//! ```{.bash}
//! $ RUST_LOG=main=info ./main
//! [2017-11-09T02:12:24Z ERROR main] this is printed by default
//! [2017-11-09T02:12:24Z INFO main] the answer was: 12
//! ```
//!
//! And enable all logging:
//!
//! ```{.bash}
//! $ RUST_LOG=main ./main
//! [2017-11-09T02:12:24Z DEBUG main] this is a debug message
//! [2017-11-09T02:12:24Z ERROR main] this is printed by default
//! [2017-11-09T02:12:24Z INFO main] the answer was: 12
//! ```
//!
//! If the binary name contains hyphens, you will need to replace
//! them with underscores:
//!
//! ```{.bash}
//! $ RUST_LOG=my_app ./my-app
//! [2017-11-09T02:12:24Z DEBUG my_app] this is a debug message
//! [2017-11-09T02:12:24Z ERROR my_app] this is printed by default
//! [2017-11-09T02:12:24Z INFO my_app] the answer was: 12
//! ```
//!
//! This is because Rust modules and crates cannot contain hyphens
//! in their name, although `cargo` continues to accept them.
//!
//! See the documentation for the [`log` crate][log-crate-url] for more
//! information about its API.
//!
//! ## Enabling logging
//!
//! **By default all logging is disabled except for the `error` level**
//!
//! The **`RUST_LOG`** environment variable controls logging with the syntax:
//! ```text
//! RUST_LOG=[target][=][level][,...]
//! ```
//! Or in other words, its a comma-separated list of directives.
//! Directives can filter by **target**, by **level**, or both (using `=`).
//!
//! For example,
//! ```text
//! RUST_LOG=data=debug,hardware=debug
//! ```
//!
//! **target** is typically the path of the module the message
//! in question originated from, though it can be overridden.
//! The path is rooted in the name of the crate it was compiled for, so if
//! your program is in a file called, for example, `hello.rs`, the path would
//! simply be `hello`.
//!
//! Furthermore, the log can be filtered using prefix-search based on the
//! specified log target.
//!
//! For example, `RUST_LOG=example` would match the following targets:
//! - `example`
//! - `example::test`
//! - `example::test::module::submodule`
//! - `examples::and_more_examples`
//!
//! When providing the crate name or a module path, explicitly specifying the
//! log level is optional. If omitted, all logging for the item will be
//! enabled.
//!
//! **level** is the maximum [`log::Level`][level-enum] to be shown and includes:
//! - `error`
//! - `warn`
//! - `info`
//! - `debug`
//! - `trace`
//! - `off` (pseudo level to disable all logging for the target)
//!
//! Logging level names are case-insensitive; e.g.,
//! `debug`, `DEBUG`, and `dEbuG` all represent the same logging level. For
//! consistency, our convention is to use the lower case names. Where our docs
//! do use other forms, they do so in the context of specific examples, so you
//! won't be surprised if you see similar usage in the wild.
//!
//! Some examples of valid values of `RUST_LOG` are:
//!
//! - `RUST_LOG=hello` turns on all logging for the `hello` module
//! - `RUST_LOG=trace` turns on all logging for the application, regardless of its name
//! - `RUST_LOG=TRACE` turns on all logging for the application, regardless of its name (same as previous)
//! - `RUST_LOG=info` turns on all info logging
//! - `RUST_LOG=INFO` turns on all info logging (same as previous)
//! - `RUST_LOG=hello=debug` turns on debug logging for `hello`
//! - `RUST_LOG=hello=DEBUG` turns on debug logging for `hello` (same as previous)
//! - `RUST_LOG=hello,std::option` turns on `hello`, and std's option logging
//! - `RUST_LOG=error,hello=warn` turn on global error logging and also warn for `hello`
//! - `RUST_LOG=error,hello=off` turn on global error logging, but turn off logging for `hello`
//! - `RUST_LOG=off` turns off all logging for the application
//! - `RUST_LOG=OFF` turns off all logging for the application (same as previous)
//!
//! ## Filtering results
//!
//! A `RUST_LOG` directive may include a regex filter. The syntax is to append `/`
//! followed by a regex. Each message is checked against the regex, and is only
//! logged if it matches. Note that the matching is done after formatting the
//! log string but before adding any logging meta-data. There is a single filter
//! for all modules.
//!
//! Some examples:
//!
//! * `hello/foo` turns on all logging for the 'hello' module where the log
//! message includes 'foo'.
//! * `info/f.o` turns on all info logging where the log message includes 'foo',
//! 'f1o', 'fao', etc.
//! * `hello=debug/foo*foo` turns on debug logging for 'hello' where the log
//! message includes 'foofoo' or 'fofoo' or 'fooooooofoo', etc.
//! * `error,hello=warn/[0-9]scopes` turn on global error logging and also
//! warn for hello. In both cases the log message must include a single digit
//! number followed by 'scopes'.
//!
//! ## Capturing logs in tests
//!
//! Records logged during `cargo test` will not be captured by the test harness by default.
//! The [`Builder::is_test`] method can be used in unit tests to ensure logs will be captured:
//!
//! ```
//! #[cfg(test)]
//! mod tests {
//! use log::info;
//!
//! fn init() {
//! let _ = env_logger::builder().is_test(true).try_init();
//! }
//!
//! #[test]
//! fn it_works() {
//! init();
//!
//! info!("This record will be captured by `cargo test`");
//!
//! assert_eq!(2, 1 + 1);
//! }
//! }
//! ```
//!
//! Enabling test capturing comes at the expense of color and other style support
//! and may have performance implications.
//!
//! ## Disabling colors
//!
//! Colors and other styles can be configured with the `RUST_LOG_STYLE`
//! environment variable. It accepts the following values:
//!
//! * `auto` (default) will attempt to print style characters, but don't force the issue.
//! If the console isn't available on Windows, or if TERM=dumb, for example, then don't print colors.
//! * `always` will always print style characters even if they aren't supported by the terminal.
//! This includes emitting ANSI colors on Windows if the console API is unavailable.
//! * `never` will never print style characters.
//!
//! ## Tweaking the default format
//!
//! Parts of the default format can be excluded from the log output using the [`Builder`].
//! The following example excludes the timestamp from the log output:
//!
//! ```
//! env_logger::builder()
//! .format_timestamp(None)
//! .init();
//! ```
//!
//! ### Stability of the default format
//!
//! The default format won't optimise for long-term stability, and explicitly makes no
//! guarantees about the stability of its output across major, minor or patch version
//! bumps during `0.x`.
//!
//! If you want to capture or interpret the output of `env_logger` programmatically
//! then you should use a custom format.
//!
//! ### Using a custom format
//!
//! Custom formats can be provided as closures to the [`Builder`].
//! These closures take a [`Formatter`][crate::fmt::Formatter] and `log::Record` as arguments:
//!
//! ```
//! use std::io::Write;
//!
//! env_logger::builder()
//! .format(|buf, record| {
//! writeln!(buf, "{}: {}", record.level(), record.args())
//! })
//! .init();
//! ```
//!
//! See the [`fmt`] module for more details about custom formats.
//!
//! ## Specifying defaults for environment variables
//!
//! `env_logger` can read configuration from environment variables.
//! If these variables aren't present, the default value to use can be tweaked with the [`Env`] type.
//! The following example defaults to log `warn` and above if the `RUST_LOG` environment variable
//! isn't set:
//!
//! ```
//! use env_logger::Env;
//!
//! env_logger::Builder::from_env(Env::default().default_filter_or("warn")).init();
//! ```
//!
//! [gh-repo-examples]: https://github.com/rust-cli/env_logger/tree/main/examples
//! [level-enum]: https://docs.rs/log/latest/log/enum.Level.html
//! [log-crate-url]: https://docs.rs/log
//! [`Builder`]: struct.Builder.html
//! [`Builder::is_test`]: struct.Builder.html#method.is_test
//! [`Env`]: struct.Env.html
//! [`fmt`]: fmt/index.html
#![doc(
html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
html_favicon_url = "https://www.rust-lang.org/static/images/favicon.ico"
)]
#![cfg_attr(docsrs, feature(doc_auto_cfg))]
// When compiled for the rustc compiler itself we want to make sure that this is
// an unstable crate
#![cfg_attr(rustbuild, feature(staged_api, rustc_private))]
#![cfg_attr(rustbuild, unstable(feature = "rustc_private", issue = "27812"))]
#![deny(missing_debug_implementations, missing_docs)]
mod logger;
pub mod filter;
pub mod fmt;
pub use self::fmt::glob::*;
pub use self::logger::*;

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extern crate env_logger;
extern crate log;
use std::env;
use std::process;
use std::str;
fn main() {
if env::var("YOU_ARE_TESTING_NOW").is_ok() {
// Init from the env (which should set the max level to `Debug`)
env_logger::init();
assert_eq!(log::LevelFilter::Debug, log::max_level());
// Init again using a different max level
// This shouldn't clobber the level that was previously set
env_logger::Builder::new()
.parse_filters("info")
.try_init()
.unwrap_err();
assert_eq!(log::LevelFilter::Debug, log::max_level());
return;
}
let exe = env::current_exe().unwrap();
let out = process::Command::new(exe)
.env("YOU_ARE_TESTING_NOW", "1")
.env("RUST_LOG", "debug")
.output()
.unwrap_or_else(|e| panic!("Unable to start child process: {}", e));
if out.status.success() {
return;
}
println!("test failed: {}", out.status);
println!("--- stdout\n{}", str::from_utf8(&out.stdout).unwrap());
println!("--- stderr\n{}", str::from_utf8(&out.stderr).unwrap());
process::exit(1);
}

39
third-party/vendor/env_logger/tests/log-in-log.rs vendored Normal file
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#[macro_use]
extern crate log;
extern crate env_logger;
use std::env;
use std::fmt;
use std::process;
use std::str;
struct Foo;
impl fmt::Display for Foo {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
info!("test");
f.write_str("bar")
}
}
fn main() {
env_logger::init();
if env::var("YOU_ARE_TESTING_NOW").is_ok() {
return info!("{}", Foo);
}
let exe = env::current_exe().unwrap();
let out = process::Command::new(exe)
.env("YOU_ARE_TESTING_NOW", "1")
.env("RUST_LOG", "debug")
.output()
.unwrap_or_else(|e| panic!("Unable to start child process: {}", e));
if out.status.success() {
return;
}
println!("test failed: {}", out.status);
println!("--- stdout\n{}", str::from_utf8(&out.stdout).unwrap());
println!("--- stderr\n{}", str::from_utf8(&out.stderr).unwrap());
process::exit(1);
}

66
third-party/vendor/env_logger/tests/log_tls_dtors.rs vendored Normal file
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#[macro_use]
extern crate log;
extern crate env_logger;
use std::env;
use std::process;
use std::str;
use std::thread;
struct DropMe;
impl Drop for DropMe {
fn drop(&mut self) {
debug!("Dropping now");
}
}
fn run() {
// Use multiple thread local values to increase the chance that our TLS
// value will get destroyed after the FORMATTER key in the library
thread_local! {
static DROP_ME_0: DropMe = DropMe;
static DROP_ME_1: DropMe = DropMe;
static DROP_ME_2: DropMe = DropMe;
static DROP_ME_3: DropMe = DropMe;
static DROP_ME_4: DropMe = DropMe;
static DROP_ME_5: DropMe = DropMe;
static DROP_ME_6: DropMe = DropMe;
static DROP_ME_7: DropMe = DropMe;
static DROP_ME_8: DropMe = DropMe;
static DROP_ME_9: DropMe = DropMe;
}
DROP_ME_0.with(|_| {});
DROP_ME_1.with(|_| {});
DROP_ME_2.with(|_| {});
DROP_ME_3.with(|_| {});
DROP_ME_4.with(|_| {});
DROP_ME_5.with(|_| {});
DROP_ME_6.with(|_| {});
DROP_ME_7.with(|_| {});
DROP_ME_8.with(|_| {});
DROP_ME_9.with(|_| {});
}
fn main() {
env_logger::init();
if env::var("YOU_ARE_TESTING_NOW").is_ok() {
// Run on a separate thread because TLS values on the main thread
// won't have their destructors run if pthread is used.
// https://doc.rust-lang.org/std/thread/struct.LocalKey.html#platform-specific-behavior
thread::spawn(run).join().unwrap();
} else {
let exe = env::current_exe().unwrap();
let out = process::Command::new(exe)
.env("YOU_ARE_TESTING_NOW", "1")
.env("RUST_LOG", "debug")
.output()
.unwrap_or_else(|e| panic!("Unable to start child process: {}", e));
if !out.status.success() {
println!("test failed: {}", out.status);
println!("--- stdout\n{}", str::from_utf8(&out.stdout).unwrap());
println!("--- stderr\n{}", str::from_utf8(&out.stderr).unwrap());
process::exit(1);
}
}
}

57
third-party/vendor/env_logger/tests/regexp_filter.rs vendored Normal file
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#[macro_use]
extern crate log;
extern crate env_logger;
use std::env;
use std::process;
use std::str;
fn main() {
if env::var("LOG_REGEXP_TEST").ok() == Some(String::from("1")) {
child_main();
} else {
parent_main()
}
}
fn child_main() {
env_logger::init();
info!("XYZ Message");
}
fn run_child(rust_log: String) -> bool {
let exe = env::current_exe().unwrap();
let out = process::Command::new(exe)
.env("LOG_REGEXP_TEST", "1")
.env("RUST_LOG", rust_log)
.output()
.unwrap_or_else(|e| panic!("Unable to start child process: {}", e));
str::from_utf8(out.stderr.as_ref())
.unwrap()
.contains("XYZ Message")
}
fn assert_message_printed(rust_log: &str) {
if !run_child(rust_log.to_string()) {
panic!("RUST_LOG={} should allow the test log message", rust_log)
}
}
fn assert_message_not_printed(rust_log: &str) {
if run_child(rust_log.to_string()) {
panic!(
"RUST_LOG={} should not allow the test log message",
rust_log
)
}
}
fn parent_main() {
// test normal log severity levels
assert_message_printed("info");
assert_message_not_printed("warn");
// test of regular expression filters
assert_message_printed("info/XYZ");
assert_message_not_printed("info/XXX");
}