add example prompt configuration

Cargo.lock

@@ -45,6 +45,16 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "crsh"
+version = "0.1.0"
+dependencies = [
+ "mlua",
+ "shellexpand",
+ "shlex",
+ "whoami",
+]
+
 [[package]]
 name = "dirs"
 version = "6.0.0"
@@ -245,16 +255,6 @@ dependencies = [
  "thiserror",
 ]
 
-[[package]]
-name = "rush"
-version = "0.1.0"
-dependencies = [
- "mlua",
- "shellexpand",
- "shlex",
- "whoami",
-]
-
 [[package]]
 name = "rustc-hash"
 version = "2.1.1"

Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "rush"
+name = "crsh"
 version = "0.1.0"
 edition = "2024"
 

README.md

@@ -1,3 +1,3 @@
-# RuSH
+# Crab Shell
 
 Learning rust by making a shell.

crsh.lua

@@ -1,6 +1,8 @@
 -- This table will hold the configuration.
 local config = {}
 
+config.prompt = "[${user}@${host}:${dir}$"
+
 config.shellAliases = {
 	ls = "ls --color=auto",
 }

src/inbuilt.rs

@@ -15,7 +15,7 @@ pub fn cd(args: &[String]) {
 }
 
 pub fn help() {
-    println!("RuSH v0.1.0");
+    println!("crsh v0.1.0");
     println!("---------------------");
     println!("Available Commands:");
     println!("  cd            - Change directory");

src/lib.rs

@@ -0,0 +1,52 @@
+pub mod core;
+pub mod inbuilt;
+
+pub use core::*;
+pub use inbuilt::*;
+
+// Helper function for resolving aliases.
+pub fn resolve_alias(config: &mlua::Table, cmd: &str) -> Option<String> {
+    config
+        .get::<mlua::Table>("shellAliases")
+        .ok()
+        .and_then(|aliases| aliases.get(cmd).ok())
+}
+
+// Return prompt from configuration file with expansion performed.
+// Otherwise return default prompt.
+pub fn resolve_prompt(config: &mlua::Table) -> String {
+    let default_prompt = "[${user}@${host}:${dir}]$".to_string();
+
+    let prompt = config
+        .get::<String>("prompt")
+        .unwrap_or(default_prompt)
+        + " ";
+
+    shellexpand::env_with_context_no_errors(&prompt, context).to_string()
+}
+
+// Format current working directory.
+fn fmt_cwd() -> String {
+    let home = std::env::var("HOME").unwrap_or_default();
+    let cwd = std::env::current_dir()
+        .ok()
+        .and_then(|p| p.to_str().map(String::from))
+        .unwrap_or_default();
+
+    // Replace $HOME with ~.
+    if cwd.starts_with(&home) {
+        cwd.replacen(&home, "~", 1)
+    } else {
+        cwd
+    }
+}
+
+// Context for shell expansion.
+fn context(s: &str) -> Option<String> {
+    match s {
+        "user" => Some(whoami::username()),
+        "host" => Some(whoami::devicename()),
+        "dir" => Some(fmt_cwd()),
+        _ => None,
+    }
+}

src/main.rs

@@ -1,64 +1,12 @@
-mod core;
-use core::*;
-
-mod inbuilt;
-use inbuilt::*;
-
+use crsh::*;
 use mlua::prelude::*;
 
-// Helper function for resolving aliases.
-fn resolve_alias(config: &mlua::Table, cmd: &str) -> Option<String> {
-    config
-        .get::<mlua::Table>("shellAliases")
-        .ok()
-        .and_then(|aliases| aliases.get(cmd).ok())
-}
-
-// Return prompt from configuration file with expansion performed.
-// Otherwise return default prompt.
-fn resolve_prompt(config: &mlua::Table) -> String {
-    let default_prompt = "[${user}@${host}:${cwd}]$".to_string();
-
-    let prompt = config
-        .get::<String>("prompt")
-        .unwrap_or(default_prompt)
-        + " ";
-
-    shellexpand::env_with_context_no_errors(&prompt, context).to_string()
-}
-
-// Format current working directory.
-fn fmt_cwd() -> String {
-    let home = std::env::var("HOME").unwrap_or_default();
-    let cwd = std::env::current_dir()
-        .ok()
-        .and_then(|p| p.to_str().map(String::from))
-        .unwrap_or_default();
-
-    // Replace $HOME with ~.
-    if cwd.starts_with(&home) {
-        cwd.replacen(&home, "~", 1)
-    } else {
-        cwd
-    }
-}
-
-// Context for shell expansion.
-fn context(s: &str) -> Option<String> {
-    match s {
-        "user" => Some(whoami::username()),
-        "host" => Some(whoami::devicename()),
-        "cwd" => Some(fmt_cwd()),
-        _ => None,
-    }
-}
-
 fn main() {
     // Create a new Lua state and load the safe subset of the standard libraries.
     let lua = Lua::new();
 
     // Retreive Lua source code from configuration file.
-    lua.load("config = require 'rush'")
+    lua.load("config = require 'crsh'")
         .exec()
         .expect("Failed to load configuration.");