1 use std::fs::File;
2 use std::path::{Path, PathBuf};
3 use std::{env, fs, io};
4
5 use crate::errors::*;
6 use crate::iter::Iter;
7
8 pub struct Finder<'a> {
9 filename: &'a Path,
10 }
11
12 impl<'a> Finder<'a> {
new() -> Self13 pub fn new() -> Self {
14 Finder {
15 filename: Path::new(".env"),
16 }
17 }
18
filename(mut self, filename: &'a Path) -> Self19 pub fn filename(mut self, filename: &'a Path) -> Self {
20 self.filename = filename;
21 self
22 }
23
find(self) -> Result<(PathBuf, Iter<File>)>24 pub fn find(self) -> Result<(PathBuf, Iter<File>)> {
25 let path = find(&env::current_dir().map_err(Error::Io)?, self.filename)?;
26 let file = File::open(&path).map_err(Error::Io)?;
27 let iter = Iter::new(file);
28 Ok((path, iter))
29 }
30 }
31
32 /// Searches for `filename` in `directory` and parent directories until found or root is reached.
find(directory: &Path, filename: &Path) -> Result<PathBuf>33 pub fn find(directory: &Path, filename: &Path) -> Result<PathBuf> {
34 let candidate = directory.join(filename);
35
36 match fs::metadata(&candidate) {
37 Ok(metadata) => if metadata.is_file() {
38 return Ok(candidate);
39 },
40 Err(error) => {
41 if error.kind() != io::ErrorKind::NotFound {
42 return Err(Error::Io(error));
43 }
44 }
45 }
46
47 if let Some(parent) = directory.parent() {
48 find(parent, filename)
49 } else {
50 Err(Error::Io(io::Error::new(io::ErrorKind::NotFound, "path not found")))
51 }
52 }
53