fix: always try HOME environment variable first when obtaining the …

…home directory.

This will fix issues like the one described here:

stacked-git/stgit#407

gix-path/src/env/mod.rs

@@ -101,8 +101,16 @@ pub fn home_dir() -> Option<PathBuf> {
     std::env::var("HOME").map(PathBuf::from).ok()
 }
 
+/// Tries to obtain the home directory from `HOME` on all platforms, but falls back to [`home::home_dir()`] for
+/// more complex ways of obtaining a home directory, particularly useful on Windows.
+///
+/// The reason `HOME` is tried first is to allow Windows users to have a custom location for their linux-style
+/// home, as otherwise they would have to accumulate dot files in a directory these are inconvenient and perceived
+/// as clutter.
 #[cfg(not(target_family = "wasm"))]
-pub use home::home_dir;
+pub fn home_dir() -> Option<PathBuf> {
+    std::env::var_os("HOME").map(Into::into).or_else(home::home_dir)
+}
 
 /// Returns the contents of an environment variable of `name` with some special handling
 /// for certain environment variables (like `HOME`) for platform compatibility.