Opening a file returns ErrorKind::Other 'Error: Os, code: 20, message: "Not a directory"' - file-io

Question

I'm trying to open a file, and if it doesn't exist create it. But for some reason I'm getting an error of ErrorKind::Other with the message "Not a directory". Here is the full error I'm getting:
thread 'main' panicked at 'Unknown error when opening file: Os { code: 20, kind: Other, message: "Not a directory" }', src/main.rs:53:17
Here is my code:
let mut filepath = std::env::current_exe()?;
filepath.push("days");
filepath.set_extension("toml");
let mut file = match File::open(filepath.clone()) {
Ok(f) => f,
Err(e) => match e.kind() {
ErrorKind::NotFound => {
{
let mut create_file = File::create(filepath.clone());
create_file.write_all(...); // Dummy data
}
File::open(filepath.clone())?
},
_ => {
panic!("Unknow error when opening file: {:?}", e); // This is line 53
}
}
};
When I print the filepath to the console to check it I get "/mnt/c/Projects/Other/random/hmdict/target/debug/hmdict/days.toml", which is correct.
Does anyone know why I'm getting os error 20 "Not a directory"?
P.S I'm using Rust nightly-x86_64-unknown-linux-gnu with rustc version 1.46.0-nightly in WSL running on Windows 10 build 18363 Version 1909

Answer 1

The problem is push creates a seperate path. If your executable location was <what_ever>/hmdict, your code creates a path <whatever>/hmdict/days.toml. Obviously, this path doesn't exist because hmdict is a executable file and not a directory.