CODEWITHSUNDEEP
rust
qweruiop
qweruiop

Reputation: 3266

Inconsistent behavior of `mktemp` crate in Rust

If I call .to_path_buf() immediately after expect, the temporary directory will not be created. Is this a bug or a Rust feature?

extern crate mktemp;                                                                                                                                                                                        

use std::path::Path;                                                                                                                                                                                        

fn main() {                                                                                                                                                                                                 
    let temp_dir = mktemp::Temp::new_dir().expect("Failed to create a temp directory");                                                                                                                     
    let temp_dir_path = temp_dir.to_path_buf();                                                                                                                                                             
    println!("tmp path exists: {}", Path::exists(&temp_dir_path));                                                                                                                                          

    let temp_dir_path = mktemp::Temp::new_dir().expect("Failed to create a temp directory").to_path_buf();                                                                                                  
    println!("tmp path exists: {}", Path::exists(&temp_dir_path));                                                                                                                                          
}

Which outputs:

tmp path exists: true
tmp path exists: false

Upvotes: 3

Views: 258

Answers (1)

DK.
DK.

Reputation: 59065

I don't know, but I wonder if there's something in the mktemp documentation about this...

Once the variable goes out of scope, the underlying file system resource is removed.

You're not storing the Temp in a variable, so it goes out of scope immediately. It's creating the directory and then immediately destroying it.

Upvotes: 10

Related Questions