joyful_minigrep 0.1.3

grep but mini and colored though
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

//! # Minigrep
//!
//! `minigrep` is the best, it's just the best what should I say?

use std::{env::Args, error::Error, fs};
pub mod core;
mod utils;
pub use utils::*;

#[derive(Eq, PartialEq, Debug)]
pub struct Config {
    query: String,
    file_location: String,
    case_sensitive: bool,
}

impl Config {
    pub fn new(mut args: Args, env_case_sensitive: bool) -> Result<Config, String> {
        // Skip first arg which is binary name
        args.next();

        let query = match args.next() {
            Some(arg) => arg,
            None => return Err(help_msg()),
        };
        let file_location = match args.next() {
            Some(arg) => arg,
            None => return Err(help_msg()),
        };

        let case_sensitive = args.next();

        let case_sensitive = if let Some(v) = case_sensitive {
            v != "i"
        } else {
            env_case_sensitive
        };

        Ok(Config {
            query,
            file_location,
            case_sensitive,
        })
    }
}

pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
    let file = fs::read_to_string(&config.file_location)?;

    let matches = if config.case_sensitive {
        core::search(&config.query, &file)
    } else {
        core::search_insensitive(&config.query, &file)
    };

    let colorized_matches = core::colorize_matches(matches);

    utils::print_success_msg(config, colorized_matches.len());

    for line in colorized_matches {
        println!("{}", line)
    }

    Ok(())
}