Version 0.2.1

- Changed args type to Vec<String> (was VecDeque<String>)
- Added help command support
- Added version command support

Cargo.toml

@@ -1,4 +1,4 @@
 [package]
 name = "mkfile"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"

readme.md

@@ -1,4 +1,4 @@
-# About the project
+# Overview
 
 Minimal Rust CLI app with no external dependencies. Creates text files. May
 create parent directories recursively, override existing files and output
@@ -9,9 +9,11 @@ verbosely.
 mkfile \[OPTION\]... PATH...
 
 Options:
-- -v --verbose - print a message for each file.
-- -p --parents - create parent directories recursively.
-- -o --override - override already existing files.
+- -v --verbose - print a message for each file;
+- -p --parents - create parent directories recursively;
+- -o --override - override already existing files;
+- --help - display help message and exit;
+- --version - display version message and exit.
 
 # Usage example
 
@@ -36,7 +38,7 @@ $ mkfile -v ~/file.txt
 
 # TODO
 
-Add parameters:
-- -T --text=string - include this text in all new files.
-- --help
-- --version
+- Create binary files
+- Default text parameter for all files
+- Default binary parameter for all files in binary mode
+- chmod parameter

src/main.rs

@@ -1,16 +1,15 @@
-use std::collections::VecDeque;
 use std::env;
 use std::fs;
 use std::fs::File;
 use std::path::Path;
 
 fn main() {
-    // Collect args and remove the executable path
-    let mut args: VecDeque<String> = env::args().collect();
-    args.pop_front();
+    // Collect args
+    let args: Vec<String> = env::args().collect();
 
-    // Return if no args
-    if args.is_empty() {
+    // Return if no args and print help message
+    if args.len() <= 1 {
+        print_help_msg();
         return;
     }
 
@@ -23,10 +22,11 @@ fn main() {
     let mut create_parents = false;
     let mut do_override = false;
 
-    for arg in &args {
+    // [1..] since the first arg is the executable path
+    for arg in &args[1..] {
         let a = arg.chars().nth(0);
         let b = arg.chars().nth(1);
-        let c = arg.chars().nth(3);
+        let c = arg.chars().nth(2);
 
         // Long option --option
         if a.eq(&Some('-')) && b.eq(&Some('-')) && c.is_some() {
@@ -53,6 +53,14 @@ fn main() {
             "v" | "verbose" => is_verbose = true,
             "p" | "parents" => create_parents = true,
             "o" | "override" => do_override = true,
+            "help" => {
+                print_help_msg();
+                return;
+            }
+            "version" => {
+                print_version_msg();
+                return;
+            }
             _ => options_wrong.push(opt.to_string()),
         }
     }
@@ -99,3 +107,18 @@ fn main() {
         };
     }
 }
+
+fn print_help_msg() {
+    println!("Usage: mkfile [OPTION]... PATH...");
+    println!("Create file(s), if they do not already exist.\n");
+    println!("Options:");
+    println!("-v --verbose    print a message for each file");
+    println!("-p --parents    create parent directories recursively");
+    println!("-o --override   override already existing files");
+    println!("   --help       display this help and exit");
+    println!("   --version    output version information and exit (todo!)");
+}
+
+fn print_version_msg() {
+    println!("mkfile v{}", env!("CARGO_PKG_VERSION"));
+}