feat: Support for SUDO_UID as fallback for ownership check on unix.

Author: Byron

git-sec/src/identity.rs

@@ -34,8 +34,19 @@ mod impl_ {
             let uid = unsafe { libc::geteuid() };
             Ok(uid)
         }
-
-        Ok(owner_from_path(path)? == owner_of_current_process()?)
+        use std::str::FromStr;
+
+        let owner_of_path = owner_from_path(path)?;
+        let owner_of_process = owner_of_current_process()?;
+        if owner_of_path == owner_of_process {
+            Ok(true)
+        } else if let Some(sudo_uid) =
+            std::env::var_os("SUDO_UID").and_then(|val| val.to_str().and_then(|val_str| u32::from_str(val_str).ok()))
+        {
+            Ok(owner_of_path == sudo_uid)
+        } else {
+            Ok(false)
+        }
     }
 }