dotenv_flow/
find.rs

1use std::fs::File;
2use std::path::{Path, PathBuf};
3use std::{env, fs, io};
4
5use crate::errors::*;
6use crate::iter::Iter;
7
8pub struct Finder<'a> {
9    filename: &'a Path,
10}
11
12impl<'a> Finder<'a> {
13    pub fn new() -> Self {
14        Finder {
15            filename: Path::new(".env"),
16        }
17    }
18
19    pub fn from_path<P:'a + AsRef<Path>>(path: &'a P) -> Self {
20        Finder {
21            filename: path.as_ref().clone(),
22        }
23    }
24
25    pub fn filename(mut self, filename: &'a Path) -> Self {
26        self.filename = filename;
27        self
28    }
29
30    pub fn find(self) -> Result<(PathBuf, Iter<File>)> {
31        let path = find(&env::current_dir().map_err(Error::Io)?, self.filename)?;
32        let file = File::open(&path).map_err(Error::Io)?;
33        let iter = Iter::new(file);
34        Ok((path, iter))
35    }
36}
37
38/// Searches for `filename` in `directory` and parent directories until found or root is reached.
39pub fn find(directory: &Path, filename: &Path) -> Result<PathBuf> {
40    let candidate = directory.join(filename);
41
42    match fs::metadata(&candidate) {
43        Ok(metadata) => {
44            if metadata.is_file() {
45                return Ok(candidate);
46            }
47        }
48        Err(error) => {
49            if error.kind() != io::ErrorKind::NotFound {
50                return Err(Error::Io(error));
51            }
52        }
53    }
54
55    if let Some(parent) = directory.parent() {
56        find(parent, filename)
57    } else {
58        Err(Error::Io(io::Error::new(
59            io::ErrorKind::NotFound,
60            "path not found",
61        )))
62    }
63}
dotenv_flow/find.rs

dotenv_flow/
find.rs
