Correctly fall back to home folder if HOME is unset (#533)

CHANGELOG.md

@@ -9,6 +9,8 @@ _Unreleased_
 
 - Fixed default generated script reference.  #527
 
+- Correctly fall back to home folder if HOME is unset.  #533 
+
 <!-- released start -->
 
 ## 0.16.0

rye/src/platform.rs

@@ -15,9 +15,22 @@ pub fn init() -> Result<(), Error> {
     let home = if let Some(rye_home) = env::var_os("RYE_HOME") {
         PathBuf::from(rye_home)
     } else {
-        simple_home_dir::home_dir()
-            .map(|x| x.join(".rye"))
-            .ok_or_else(|| anyhow!("could not determine home folder"))?
+        {
+            // ironically the deprecated home dir implementation is
+            // still the only one that falls back to getpwuid.
+            // Fixes https://github.com/mitsuhiko/rye/issues/532
+            #[cfg(unix)]
+            {
+                #[allow(deprecated)]
+                std::env::home_dir()
+            }
+            #[cfg(not(unix))]
+            {
+                simple_home_dir::home_dir()
+            }
+        }
+        .map(|x| x.join(".rye"))
+        .ok_or_else(|| anyhow!("could not determine home folder"))?
     };
     *APP_DIR.lock().unwrap() = Some(Box::leak(Box::new(home)));
     Ok(())