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src/util.rs: No need to list

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This commit is contained in:
Zhaofeng Li 2021-10-28 14:09:35 -07:00
parent 0e0a1e84f0
commit 58f2bf391f
1 changed files with 8 additions and 30 deletions
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38
src/util.rs
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@ -1,5 +1,4 @@
use std::collections::HashMap;
use std::fs;
use std::path::PathBuf;
use std::process::Stdio;
@ -87,36 +86,15 @@ pub async fn hive_from_args(args: &ArgMatches<'_>) -> NixResult<Hive> {
let mut file_path = None;
loop {
let mut listing = match fs::read_dir(&cur) {
Ok(listing) => listing,
Err(e) => {
// This can very likely fail in shared environments
// where users aren't able to list /home. It's not
// unexpected.
//
// It may not be immediately obvious to the user that
// we are traversing upwards to find hive.nix.
log::warn!("Could not traverse up ({:?}) to find hive.nix: {}", cur, e);
break;
},
};
let flake = cur.join("flake.nix");
if flake.is_file() {
file_path = Some(flake);
break;
}
let found = listing.find_map(|rdirent| {
match rdirent {
Err(e) => Some(Err(e)),
Ok(f) => {
if f.file_name() == "flake.nix" || f.file_name() == "hive.nix" {
Some(Ok(f))
} else {
None
}
}
}
});
if let Some(rdirent) = found {
let dirent = rdirent?;
file_path = Some(dirent.path());
let legacy = cur.join("hive.nix");
if legacy.is_file() {
file_path = Some(legacy);
break;
}