fstdout-logger 0.2.2

An implementation of the log crate that logs to stdout and to an optional log file with configurable options.
Documentation 
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

use colored::Colorize;

/// Display example log messages with colors to demonstrate the output format
pub fn show_colored_log_examples() {
    println!("=== COLORED LOG EXAMPLES ===");

    let timestamp = chrono::Local::now().format("%H:%M:%S");
    let colored_time = timestamp.to_string().bright_black();

    println!(
        "[{} {}] This is a TRACE message",
        colored_time,
        "TRACE".normal()
    );

    println!(
        "[{} {}] This is a DEBUG message",
        colored_time,
        "DEBUG".green()
    );

    println!(
        "[{} {}] This is an INFO message",
        colored_time,
        "INFO".blue().bold()
    );

    println!(
        "[{} {}] This is a WARNING message",
        colored_time,
        "WARN".yellow().bold()
    );

    println!(
        "[{} {}] This is an ERROR message",
        colored_time,
        "ERROR".red().bold()
    );

    println!(" ");
}

/// Display example log messages without colors to demonstrate the output format.
///
/// Shows how log messages appear in plain text without any color formatting.
/// This is similar to how logs would appear in a terminal with colors disabled.
pub fn show_plain_log_examples() {
    println!("=== PLAIN TEXT LOG EXAMPLES ===");

    let timestamp = chrono::Local::now().format("%H:%M:%S");

    println!("[{timestamp} TRACE] This is a TRACE message");

    println!("[{timestamp} DEBUG] This is a DEBUG message");

    println!("[{timestamp} INFO] This is an INFO message");

    println!("[{timestamp} WARN] This is a WARNING message");

    println!("[{timestamp} ERROR] This is an ERROR message");

    println!(" ");
}

/// Display example log messages with file information.
///
/// Compares how logs appear with and without file/line information.
/// This helps visualize the difference between development logs (with file info)
/// and production logs (without file info).
pub fn show_file_info_examples() {
    println!("=== LOGS WITH FILE INFO ===");

    let timestamp = chrono::Local::now().format("%H:%M:%S");
    let file = "examples/show_colors.rs";
    let line = 42;

    println!(
        "[{} {} {}:{}] This is a log message with file info",
        timestamp.to_string().bright_black(),
        "INFO".blue().bold(),
        file.bright_black(),
        line
    );

    println!("=== LOGS WITHOUT FILE INFO ===");

    println!(
        "[{} {}] This is a log message without file info",
        timestamp.to_string().bright_black(),
        "INFO".blue().bold()
    );

    println!(" ");
}