Added help command

Author: typable

README.md

@@ -48,3 +48,4 @@ All arguments can be use independently with each other.
 |**--level [-l]**|Specifies the depth of the tree|`--level=0`|
 |**--out [-o]**|Specifies the output file|`--out=tree.txt`|
 |**--all [-a]**|Shows all `.*` files and directories|`--all`|
+|**--help [-h]**|Shows a list of all commands||

src/main.rs

@@ -57,6 +57,15 @@ fn main() {
  arg if arg.starts_with("-a") || arg.starts_with("--all") => {
  all = true;
  },
+ arg if arg.starts_with("-h") || arg.starts_with("--help") => {
+ println!("A list of all commands:");
+ println!("{}", format!("{: <10}{: <8}{}", "--path", "[-p]", "Specifies the to be used path"));
+ println!("{}", format!("{: <10}{: <8}{}", "--level", "[-l]", "Specifies the depth of the tree"));
+ println!("{}", format!("{: <10}{: <8}{}", "--out", "[-o]", "Specifies the output file"));
+ println!("{}", format!("{: <10}{: <8}{}", "--all", "[-a]", "Shows all '.*' files and directories"));
+ println!("{}", format!("{: <10}{: <8}{}", "--help", "[-h]", "Shows a list of all commands"));
+ return;
+ },
  _ => {
  println!("Error: Unknown argument '{}'!", arg);
  return;