Initial Commit

.gitignore

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+/target

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/minigrep.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="CPP_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/minigrep.iml" filepath="$PROJECT_DIR$/.idea/minigrep.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "minigrep"
+version = "0.1.0"

Cargo.toml

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

poem.txt

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+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!

src/lib.rs

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+use std::error::Error;
+use std::{env, fs};
+
+pub struct Config {
+    pub research: String,
+    pub filename: String,
+    pub verbose: bool
+}
+
+impl Config {
+    pub fn new(args: &[String]) -> Result<Config, &'static str> {
+        if args.len() < 3 {
+            return Err("Not enough arguments !");
+        }
+
+        let research = args[1].clone();
+        let filename = args[2].clone();
+
+        let verbose = env::var("VERBOSE").is_err();
+
+        Ok(Config {
+            research,
+            filename,
+            verbose
+        })
+    }
+}
+
+pub fn search<'a>(
+    research: &str,
+    content: &'a str,
+) -> Vec<&'a str> {
+    let mut result = Vec::new();
+
+    for line in content.lines() {
+        if line.contains(&research) {
+            result.push(line);
+        }
+    }
+
+    result
+}
+
+pub fn search_insensitive_case<'a>(
+    research: &str,
+    content: &'a str,
+) -> Vec<&'a str> {
+    let research = research.to_lowercase();
+    let mut result = Vec::new();
+
+    for line in content.lines() {
+        if line.to_lowercase().contains(&research) {
+            result.push(line);
+        }
+    }
+
+    result
+}
+
+pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
+    let content = fs::read_to_string(config.filename)?;
+
+    println!("Content : \n{}", content);
+
+    let result = if config.verbose {
+        search(&config.research, &content)
+    } else {
+        search_insensitive_case(&config.research, &content)
+    };
+
+    for line in result {
+        println!("{}", line);
+    }
+
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn sensible_casse() {
+        let research = "duct";
+        let content = "\
+Rust:
+sécurité, rapidité, productivité.
+Obtenez les trois en même temps.
+Duck tape.";
+
+        assert_eq!(vec!["sécurité, rapidité, productivité."], search(research, content));
+    }
+
+    #[test]
+    fn insensible_casse() {
+        let research = "rUsT";
+        let content = "\
+Rust:
+sécurité, rapidité, productivité.
+Obtenez les trois en même temps.
+C'est pas rustique.";
+
+        assert_eq!(
+            vec!["Rust:", "C'est pas rustique."],
+            search_insensitive_case(research, content)
+        );
+    }
+}

src/main.rs

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+use std::env::args;
+use std::process;
+
+use minigrep::Config;
+
+fn main() {
+    let args: Vec<String> = args().collect();
+
+    let config = Config::new(&args).unwrap_or_else(|err| {
+        eprintln!("Problème rencontré lors de l'interprétation des arguments : {}", err);
+        process::exit(1);
+    });
+
+    if let Err(e) = minigrep::run(config) {
+        eprintln!("Erreur applicative : {}", e);
+
+        process::exit(1);
+    }
+}