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| use std::path::Path; | |
| use std::fs::ReadDir; | |
| //#[derive(Debug)] | |
| //#[allow(dead_code)] | |
| struct Walk { | |
| rds: Vec<ReadDir>, | |
| } | |
| impl Walk { | |
| fn new(root: &str) -> Result<Walk, Box<dyn std::error::Error>> { | |
| let path = Path::new(root); | |
| match path.read_dir() { | |
| Ok(rd) => { | |
| let w = Walk { | |
| rds: vec![rd], | |
| }; | |
| std::result::Result::Ok(w) | |
| }, | |
| Err(err) => { | |
| println!("Could not open dir '{}': {}", root, err); | |
| Err(Box::new(err)) | |
| }, | |
| } | |
| } | |
| } | |
| impl Iterator for Walk { | |
| type Item = String; | |
| fn next(&mut self) -> Option<Self::Item> { | |
| if self.rds.len() == 0 { | |
| //println!("empty rds"); | |
| return None; | |
| } | |
| let count = self.rds.len(); | |
| let entry = self.rds[count - 1].next(); | |
| match entry { | |
| Some(result) => { | |
| match result { | |
| Ok(dir_entry) => { | |
| if dir_entry.path().is_dir() { | |
| match dir_entry.path().read_dir() { | |
| Ok(rd) => { | |
| self.rds.push(rd); | |
| } | |
| Err(err) => { | |
| println!("Could not open dir {}", err); | |
| } | |
| } | |
| } | |
| return Some(dir_entry.path().to_str().unwrap().to_string()); | |
| }, | |
| Err(_err) => { | |
| return None | |
| }, | |
| } | |
| }, | |
| None => { | |
| self.rds.pop(); | |
| self.next() | |
| } | |
| } | |
| } | |
| } | |
| fn main() { | |
| let args: Vec<String> = std::env::args().collect(); | |
| if args.len() != 2 { | |
| eprintln!("Usage: {} PATH", args[0]); | |
| std::process::exit(1); | |
| } | |
| let path_from_user = &args[1]; | |
| let tree = match Walk::new(path_from_user) { | |
| Ok(tree) => tree, | |
| Err(err) => { | |
| println!("Error: {}", err); | |
| std::process::exit(1); | |
| } | |
| }; | |
| //println!("{:?}", &tree); | |
| for entry in tree { | |
| println!("{:?}", entry); | |
| } | |
| } |
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