BREAKING: use environments to get informations

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pay_respect"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2021"
 
 [dependencies]

README.md

@@ -8,10 +8,12 @@ The binary is named `pay-respect`, by adding an alias to your shell
 configuration:
 ``` shell
 # Note: You may need to have the binary exposed in your path
-alias f="pay_respect"
+alias f="$(pay_respect <your_shell_here>)"
 ```
 You can now **press `F` to Pay Respect**!
 
+Currently, only corrections to `bash`, `zsh`, and `fish` are implemented.
+
 ## Installing
 
 If you are using Arch Linux, you can install from AUR directly:

src/args.rs

@@ -0,0 +1,38 @@
+pub fn handle_args() {
+	let args = std::env::args().collect::<Vec<String>>();
+	if args.len() > 1 {
+		let shell = &args[1];
+		let binary_path = &args[0];
+		let last_command;
+		let alias;
+
+		match shell.as_str() {
+			"bash" => {
+				last_command = "$(history 2)";
+				alias = "$(alias)"
+			}
+			"zsh" => {
+				last_command = "$(fc -ln -1)";
+				alias = "$(alias)"
+			}
+			"fish" => {
+				last_command = "$(history | head -n 1)";
+				alias = "$(alias)";
+			}
+			_ => {
+				println!("Unknown shell: {}", shell);
+				std::process::exit(1);
+			}
+		}
+
+		println!(
+			"\
+			_PR_LAST_COMMAND=\"{}\" \
+			_PR_ALIAS=\"{}\" \
+			_PR_SHELL=\"{}\" \
+			\"{}\"",
+			last_command, alias, shell, binary_path
+		);
+		std::process::exit(0);
+	}
+}

src/corrections.rs

@@ -139,9 +139,10 @@ pub fn confirm_correction(shell: &str, command: &str, last_command: &str) {
 	std::io::stdin().read_line(&mut String::new()).unwrap();
 
 	for p in PRIVILEGE_LIST {
-		if command.starts_with(p) {
+		let _p = p.to_owned() + " ";
+		if command.starts_with(&_p) {
 			let command = command.replace(p, "");
-			std::process::Command::new(p.trim())
+			std::process::Command::new(p)
 				.arg(shell)
 				.arg("-c")
 				.arg(command)

src/main.rs

@@ -1,12 +1,16 @@
+mod args;
 mod corrections;
 mod shell;
 mod style;
 
 fn main() {
 	std::env::set_var("LC_ALL", "C");
+	args::handle_args();
 
-	let shell = shell::find_shell();
-	let last_command = shell::find_last_command(&shell);
+	let shell = std::env::var("_PR_SHELL").expect(
+		"No _PR_SHELL in environment. Did you aliased the binary with the correct arguments?",
+	);
+	let last_command = shell::last_command_expanded_alias(&shell);
 	let corrected_command = corrections::correct_command(&shell, &last_command);
 
 	if let Some(corrected_command) = corrected_command {

src/shell.rs

@@ -1,56 +1,6 @@
-use std::{collections::HashMap, fs::read_to_string, process::exit};
+use std::{process::exit};
 
-pub const PRIVILEGE_LIST: [&str; 2] = ["doas ", "sudo "];
-
-pub fn find_shell() -> String {
-	std::env::var("SHELL")
-		.unwrap_or_else(|_| String::from("bash"))
-		.rsplit('/')
-		.next()
-		.unwrap()
-		.to_string()
-		.to_lowercase()
-}
-
-pub fn find_last_command(shell: &str) -> String {
-	let history_env = std::env::var("HISTFILE");
-	let history_file = match history_env {
-		Ok(file) => file,
-		Err(_) => shell_default_history_file(shell),
-	};
-
-	let history = read_to_string(history_file)
-		.expect("Could not read history file. Try setting the HISTFILE environment variable.");
-
-	match shell {
-		"bash" => history.lines().rev().nth(1).unwrap().to_string(),
-		"zsh" => history
-			.lines()
-			.rev()
-			.nth(1)
-			.unwrap()
-			.split_once(';')
-			.unwrap()
-			.1
-			.to_string(),
-		"fish" => {
-			let mut history_lines = history.lines().rev();
-			let mut last_command = String::new();
-			let mut skips = 0;
-			while skips <= 2 {
-				last_command = history_lines.next().unwrap().to_string();
-				if last_command.starts_with("- cmd") {
-					skips += 1;
-				}
-			}
-			last_command.split_once(": ").unwrap().1.to_string()
-		}
-		_ => {
-			println!("Unsupported shell.");
-			exit(1);
-		}
-	}
-}
+pub const PRIVILEGE_LIST: [&str; 2] = ["sudo", "doas"];
 
 pub fn command_output(shell: &str, command: &str) -> String {
 	let output = std::process::Command::new(shell)
@@ -67,13 +17,79 @@ pub fn command_output(shell: &str, command: &str) -> String {
 		.to_lowercase()
 }
 
-fn shell_default_history_file(shell: &str) -> String {
-	let shell_file_map = HashMap::from([
-		("bash", String::from(".bash_history")),
-		("zsh", String::from(".zsh_history")),
-		("fish", String::from(".local/share/fish/fish_history")),
-	]);
-
-	let file = shell_file_map.get(shell).expect("Unsupported shell.");
-	format!("{}/{}", std::env::var("HOME").unwrap(), file)
+fn last_command(shell: &str) -> String {
+	let last_command = std::env::var("_PR_LAST_COMMAND").expect("No _PR_LAST_COMMAND in environment. Did you aliased the command with the correct argument?");
+	println!("last_command: {}", last_command);
+	match shell {
+		"bash" => {
+			let first_line = last_command.lines().next().unwrap();
+			let split = first_line.split_whitespace().collect::<Vec<&str>>();
+			split[1..].join(" ")
+		}
+		"zsh" => last_command,
+		"fish" => last_command,
+		_ => {
+			eprintln!("Unsupported shell: {}", shell);
+			exit(1);
+		}
+	}
+}
+
+pub fn last_command_expanded_alias(shell: &str) -> String {
+	let alias = std::env::var("_PR_ALIAS").expect(
+		"No _PR_ALIAS in environment. Did you aliased the command with the correct argument?",
+	);
+	let last_command = last_command(shell);
+	if alias.is_empty() {
+		return last_command;
+	}
+
+	let split_command = last_command.split_whitespace().collect::<Vec<&str>>();
+	let command;
+	if PRIVILEGE_LIST.contains(&split_command[0]) {
+		command = split_command[1];
+	} else {
+		command = split_command[0];
+	}
+
+	let mut expanded_command = command.to_string();
+
+	match shell {
+		"bash" => {
+			for line in alias.lines() {
+				if line.starts_with(format!("alias {}=", command).as_str()) {
+					let alias = line.replace(format!("alias {}='", command).as_str(), "");
+					let alias = alias.trim_end_matches('\'').trim_start_matches('\'');
+
+					expanded_command = alias.to_string();
+				}
+			}
+		}
+		"zsh" => {
+			for line in alias.lines() {
+				if line.starts_with(format!("{}=", command).as_str()) {
+					let alias = line.replace(format!("{}=", command).as_str(), "");
+					let alias = alias.trim_start_matches('\'').trim_end_matches('\'');
+
+					expanded_command = alias.to_string();
+				}
+			}
+		}
+		"fish" => {
+			for line in alias.lines() {
+				if line.starts_with(format!("alias {} ", command).as_str()) {
+					let alias = line.replace(format!("alias {} ", command).as_str(), "");
+					let alias = alias.trim_start_matches('\'').trim_end_matches('\'');
+
+					expanded_command = alias.to_string();
+				}
+			}
+		}
+		_ => {
+			eprintln!("Unsupported shell: {}", shell);
+			exit(1);
+		}
+	};
+
+	last_command.replacen(command, &expanded_command, 1)
 }