Default to formatting current directory and update documentation

Author: NathanLovato

README.md

@@ -35,12 +35,30 @@ You can find binaries for Windows, macOS, and Linux in the [releases tab](https:
 - **Arch Linux:** Community maintained AUR Package [gdscript-formatter-bin](https://aur.archlinux.org/packages/gdscript-formatter-bin).
 - **Windows:** Community maintained Scoop package (`scoop install` [`extras/gdscript-formatter`](https://github.com/ScoopInstaller/Extras/blob/master/bucket/gdscript-formatter.json))
 
+To recursively format all GDScript files in the current folder, run:
+
+```bash
+gdscript-formatter
+```
+
 To format a file, run:
 
 ```bash
 gdscript-formatter path/to/file.gd
 ```
 
+To recursively format all GDScript files in another folder, run:
+
+```bash
+gdscript-formatter path/to/folder
+```
+
+You can also pass multiple files or folders:
+
+```bash
+gdscript-formatter path/to/file.gd path/to/folder
+```
+
 Use the `--safe` flag to add a safety check that prevents overwriting files if the formatter makes unwanted changes (any change that would modify the code meaning, like removing a piece of functional code). This is useful when you use a development version of the formatter or when you want to be extra careful:
 
 ```bash
@@ -53,7 +71,9 @@ Format with check mode, to use in a build system (exit code 1 if changes needed)
 gdscript-formatter --check path/to/file.gd
 ```
 
-To see other possible options, run `gdscript-formatter` without any arguments.
+It will print the files that need to be formatted.
+
+To see other possible options, run `gdscript-formatter --help`.
 
 ## Linting GDScript files
 

src/main.rs

@@ -4,7 +4,7 @@ use std::{
     path::PathBuf,
 };
 
-use clap::{CommandFactory, Parser};
+use clap::Parser;
 use rayon::prelude::*;
 
 use gdscript_formatter::linter::rule_config::{
@@ -128,13 +128,6 @@ enum Commands {
 }
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    // If there are no arguments and nothing piped from stdin, print the help message
-    if env::args().len() == 1 && io::stdin().is_terminal() {
-        Args::command().print_help()?;
-        println!();
-        return Ok(());
-    }
-
     let args = Args::parse();
 
     // Handle lint subcommand
@@ -182,7 +175,9 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         safe: args.safe,
     };
 
-    if args.input.is_empty() {
+    // Is terminal allows us to distinguish between formatting piped code from
+    // stdin automatically finding all gdscript files from the current directory
+    if args.input.is_empty() && !io::stdin().is_terminal() {
         let mut input_content = String::new();
         io::stdin()
             .read_to_string(&mut input_content)
@@ -204,7 +199,15 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         return Ok(());
     }
 
-    let input_gdscript_files = find_gdscript_files(&args.input)?;
+    let input_paths = if args.input.is_empty() {
+        vec![
+            env::current_dir()
+                .map_err(|error| format!("Failed to get current directory: {}", error))?,
+        ]
+    } else {
+        args.input
+    };
+    let input_gdscript_files = find_gdscript_files(&input_paths)?;
 
     let total_files = input_gdscript_files.len();