made minigrep project.

This commit is contained in:
gabe 2022-07-29 14:39:04 -05:00
parent 0730e0f871
commit 6d5c9a730c
4 changed files with 125 additions and 0 deletions

View file

@ -0,0 +1,8 @@
[package]
name = "minigrep"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]

View file

@ -0,0 +1,9 @@
I'm nobody! Who are you?
Are you nobody, too?
Then there's a pair of us - don't tell!
They'd banish us, you know.
How dreary to be somebody!
How public, like a frog
To tell your name the livelong day
To an admiring bog!

View file

@ -0,0 +1,90 @@
use std::error::Error;
use std::env;
use std::fs;
pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
let contents = fs::read_to_string(config.filename)?;
let results = if config.ignore_case {
search_case_insensitive(&config.query, &contents)
} else {
search(&config.query, &contents)
};
for line in results {
println!("{}", line);
}
Ok(())
}
pub struct Config {
pub query: String,
pub filename: String,
pub ignore_case: bool,
}
impl Config {
pub fn new(args: &[String]) -> Result<Config, &'static str> {
if args.len() < 3 {
return Err("Not enough arguments");
}
let query = args[1].clone();
let filename = args[2].clone();
let ignore_case = env::var("IGNORE_CASE").is_ok();
Ok(Config { query, filename, ignore_case })
}
}
pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
let mut results = Vec::new();
for line in contents.lines() {
if line.contains(query) {
results.push(line);
}
}
results
}
pub fn search_case_insensitive<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
let query = query.to_lowercase();
let mut results = Vec::new();
for line in contents.lines() {
if line.to_lowercase().contains(&query) {
results.push(line);
}
}
results
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn one_result() {
let query = "duct";
let contents = "\
Rust:
safe, fast, productive.
Pick three.
Duct tape.";
assert_eq!(vec!["safe, fast, productive."], search(query, contents));
}
#[test]
fn case_insensitive() {
let query = "rUsT";
let contents = "\
Rust:
safe, fast, productive.
Pick three.
Trust me.";
assert_eq!(
vec!["Rust:", "Trust me."],
search_case_insensitive(query, contents)
);
}
}

View file

@ -0,0 +1,18 @@
use std::env;
use std::process;
use minigrep::Config;
fn main() {
let args: Vec<String> = env::args().collect();
let config = Config::new(&args).unwrap_or_else(|err| {
eprintln!("Problem parsing arguments: {}", err);
process::exit(1);
});
if let Err(e) = minigrep::run(config){
eprintln!("Application error: {}", e);
process::exit(1);
}
}