ssh-key: use std::env::home_dir instead of home crate (#415)

Prior to Rust 1.86, `std::env::home_dir` was deprecated in favor of the
`home` crate. However, Rust 1.86 fixed the behavior of the function on
Windows to use the `USERPROFILE` environment variable with a fallback to
`GetUserProfileDirectory`, meaning we no longer need to use a crate for
this purpose.

Also, `home` now has an MSRV of 1.88, which would complicate our plans
to launch with an MSRV of 1.85.

Author: tarcieri

Cargo.lock

@@ -32,7 +32,6 @@ dsa = { version = "0.7.0-rc.6", optional = true, default-features = false, featu
 ed25519-dalek = { version = "=3.0.0-pre.1", optional = true, default-features = false }
 hex = { version = "0.4", optional = true, default-features = false, features = ["alloc"] }
 hmac = { version = "0.13.0-rc.2", optional = true }
-home = { version = "0.5", optional = true }
 p256 = { version = "0.14.0-pre.11", optional = true, default-features = false, features = ["ecdsa"] }
 p384 = { version = "0.14.0-pre.11", optional = true, default-features = false, features = ["ecdsa"] }
 p521 = { version = "0.14.0-pre.11", optional = true, default-features = false, features = ["ecdsa"] }
@@ -49,7 +48,7 @@ rand_chacha = "0.9"
 [features]
 default = ["ecdsa", "rand_core", "std"]
 alloc = ["encoding/alloc", "signature/alloc", "zeroize/alloc", ]
-std = ["alloc", "dep:home"]
+std = ["alloc"]
 
 crypto = ["ed25519", "p256", "p384", "p521", "rsa"] # NOTE: `dsa` is obsolete/weak
 dsa = ["dep:dsa", "dep:sha1", "alloc", "encoding/bigint", "signature/rand_core"]

ssh-key/Cargo.toml

@@ -2,6 +2,7 @@
 
 use crate::{Fingerprint, PrivateKey, PublicKey, Result};
 use std::{
+    env,
     fs::{self, ReadDir},
     path::{Path, PathBuf},
 };
@@ -17,7 +18,8 @@ impl DotSsh {
     ///
     /// Returns `None` if the home directory couldn't be located.
     pub fn new() -> Option<Self> {
-        home::home_dir().map(|path| Self::open(path.join(".ssh")))
+        #[allow(deprecated)] // NOTE: no longer deprecated as of Rust 1.86
+        env::home_dir().map(|path| Self::open(path.join(".ssh")))
     }
 
     /// Open a `~/.ssh`-structured directory.