1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
//! Rocket's logging infrastructure.

use std::fmt;
use std::str::FromStr;
use std::sync::atomic::{AtomicBool, Ordering};

use serde::{de, Serialize, Serializer, Deserialize, Deserializer};
use yansi::{Paint, Painted, Condition};

/// Reexport the `log` crate as `private`.
pub use log as private;

// Expose logging macros (hidden) for use by core/contrib codegen.
macro_rules! define_log_macro {
    ($name:ident: $kind:ident, $target:expr, $d:tt) => (
        #[doc(hidden)]
        #[macro_export]
        macro_rules! $name {
            ($d ($t:tt)*) => ($crate::log::private::$kind!(target: $target, $d ($t)*))
        }
    );
    ($name:ident ($indented:ident): $kind:ident, $target:expr, $d:tt) => (
        define_log_macro!($name: $kind, $target, $d);
        define_log_macro!($indented: $kind, concat!($target, "::_"), $d);
    );
    ($kind:ident, $indented:ident) => (
        define_log_macro!($kind: $kind, module_path!(), $);
        define_log_macro!($indented: $kind, concat!(module_path!(), "::_"), $);

        pub use $indented;
    );
}

define_log_macro!(error, error_);
define_log_macro!(warn, warn_);
define_log_macro!(info, info_);
define_log_macro!(debug, debug_);
define_log_macro!(trace, trace_);
define_log_macro!(launch_meta (launch_meta_): info, "rocket::launch", $);
define_log_macro!(launch_info (launch_msg_): warn, "rocket::launch", $);

// `print!` panics when stdout isn't available, but this macro doesn't. See
// rwf2/Rocket#2019 and rust-lang/rust#46016 for more.
//
// Unfortunately, `libtest` captures output by replacing a special sink that
// `print!`, and _only_ `print!`, writes to. Using `write!` directly bypasses
// this sink. As a result, using this better implementation for logging means
// that test log output isn't captured, muddying `cargo test` output.
//
// As a compromise, we only use this better implementation when we're not
// compiled with `debug_assertions` or running tests, so at least tests run in
// debug-mode won't spew output. NOTE: `cfg(test)` alone isn't sufficient: the
// crate is compiled normally for integration tests.
#[cfg(not(any(debug_assertions, test, doctest)))]
macro_rules! write_out {
    ($($arg:tt)*) => ({
        use std::io::{Write, stdout, stderr};
        let _ = write!(stdout(), $($arg)*).or_else(|e| write!(stderr(), "{}", e));
    })
}

#[cfg(any(debug_assertions, test, doctest))]
macro_rules! write_out {
    ($($arg:tt)*) => (print!($($arg)*))
}

#[derive(Debug)]
struct RocketLogger;

/// Defines the maximum level of log messages to show.
#[derive(PartialEq, Eq, Debug, Clone, Copy)]
pub enum LogLevel {
    /// Only shows errors and warnings: `"critical"`.
    Critical,
    /// Shows everything except debug and trace information: `"normal"`.
    Normal,
    /// Shows everything: `"debug"`.
    Debug,
    /// Shows nothing: "`"off"`".
    Off,
}

pub trait PaintExt: Sized {
    fn emoji(self) -> Painted<Self>;
}

// Whether a record is a special `launch_{meta,info}!` record.
fn is_launch_record(record: &log::Metadata<'_>) -> bool {
    record.target().contains("rocket::launch")
}

impl log::Log for RocketLogger {
    #[inline(always)]
    fn enabled(&self, record: &log::Metadata<'_>) -> bool {
        match log::max_level().to_level() {
            Some(max) => record.level() <= max || is_launch_record(record),
            None => false
        }
    }

    fn log(&self, record: &log::Record<'_>) {
        // Print nothing if this level isn't enabled and this isn't launch info.
        if !self.enabled(record.metadata()) {
            return;
        }

        // Don't print Hyper, Rustls or r2d2 messages unless debug is enabled.
        let max = log::max_level();
        let from = |path| record.module_path().map_or(false, |m| m.starts_with(path));
        let debug_only = from("hyper") || from("rustls") || from("r2d2");
        if log::LevelFilter::from(LogLevel::Debug) > max && debug_only {
            return;
        }

        // In Rocket, we abuse targets with suffix "_" to indicate indentation.
        let indented = record.target().ends_with('_');
        if indented {
            write_out!("   {} ", ">>".bold());
        }

        // Downgrade a physical launch `warn` to logical `info`.
        let level = is_launch_record(record.metadata())
            .then(|| log::Level::Info)
            .unwrap_or_else(|| record.level());

        match level {
            log::Level::Error if !indented => {
                write_out!("{} {}\n", "Error:".red().bold(), record.args().red().wrap());
            }
            log::Level::Warn if !indented => {
                write_out!("{} {}\n", "Warning:".yellow().bold(), record.args().yellow().wrap());
            }
            log::Level::Info => write_out!("{}\n", record.args().blue().wrap()),
            log::Level::Trace => write_out!("{}\n", record.args().magenta().wrap()),
            log::Level::Warn => write_out!("{}\n", record.args().yellow().wrap()),
            log::Level::Error => write_out!("{}\n", &record.args().red().wrap()),
            log::Level::Debug => {
                write_out!("\n{} ", "-->".blue().bold());
                if let Some(file) = record.file() {
                    write_out!("{}", file.blue());
                }

                if let Some(line) = record.line() {
                    write_out!(":{}\n", line.blue());
                }

                write_out!("\t{}\n", record.args());
            }
        }
    }

    fn flush(&self) {
        // NOOP: We don't buffer any records.
    }
}

pub(crate) fn init_default() {
    crate::log::init(&crate::Config::debug_default())
}

pub(crate) fn init(config: &crate::Config) {
    static ROCKET_LOGGER_SET: AtomicBool = AtomicBool::new(false);

    // Try to initialize Rocket's logger, recording if we succeeded.
    if log::set_boxed_logger(Box::new(RocketLogger)).is_ok() {
        ROCKET_LOGGER_SET.store(true, Ordering::Release);
    }

    // Always disable colors if requested or if the stdout/err aren't TTYs.
    let should_color = config.cli_colors && Condition::stdouterr_are_tty();
    yansi::whenever(Condition::cached(should_color));

    // Set Rocket-logger specific settings only if Rocket's logger is set.
    if ROCKET_LOGGER_SET.load(Ordering::Acquire) {
        log::set_max_level(config.log_level.into());
    }
}

impl From<LogLevel> for log::LevelFilter {
    fn from(level: LogLevel) -> Self {
        match level {
            LogLevel::Critical => log::LevelFilter::Warn,
            LogLevel::Normal => log::LevelFilter::Info,
            LogLevel::Debug => log::LevelFilter::Trace,
            LogLevel::Off => log::LevelFilter::Off
        }
    }
}

impl LogLevel {
    fn as_str(&self) -> &str {
        match self {
            LogLevel::Critical => "critical",
            LogLevel::Normal => "normal",
            LogLevel::Debug => "debug",
            LogLevel::Off => "off",
        }
    }
}

impl FromStr for LogLevel {
    type Err = &'static str;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let level = match &*s.to_ascii_lowercase() {
            "critical" => LogLevel::Critical,
            "normal" => LogLevel::Normal,
            "debug" => LogLevel::Debug,
            "off" => LogLevel::Off,
            _ => return Err("a log level (off, debug, normal, critical)")
        };

        Ok(level)
    }
}

impl fmt::Display for LogLevel {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.as_str())
    }
}

impl Serialize for LogLevel {
    fn serialize<S: Serializer>(&self, ser: S) -> Result<S::Ok, S::Error> {
        ser.serialize_str(self.as_str())
    }
}

impl<'de> Deserialize<'de> for LogLevel {
    fn deserialize<D: Deserializer<'de>>(de: D) -> Result<Self, D::Error> {
        let string = String::deserialize(de)?;
        LogLevel::from_str(&string).map_err(|_| de::Error::invalid_value(
            de::Unexpected::Str(&string),
            &figment::error::OneOf( &["critical", "normal", "debug", "off"])
        ))
    }
}

impl PaintExt for &str {
    /// Paint::masked(), but hidden on Windows due to broken output. See #1122.
    fn emoji(self) -> Painted<Self> {
        #[cfg(windows)] { Paint::new("").mask() }
        #[cfg(not(windows))] { Paint::new(self).mask() }
    }
}