Merge pull request #32 from coolreader18/fix-native

Fix when the `native` directory isn't present

src/fingerprint.rs

@@ -242,7 +242,11 @@ fn total_disk_space_in_a_profile(dir: &Path) -> Result<HashMap<String, u64>, Err
     total_disk_space_by_hash_in_a_dir(&dir.join("deps"), &mut total_disk_space)?;
     // examples is just final artifacts not tracked by fingerprint so skip that one.
     // incremental is not tracked by fingerprint so skip that one.
-    total_disk_space_by_hash_in_a_dir(&dir.join("native"), &mut total_disk_space)?;
+    // `native` isn't generated by cargo since 1.37.0
+    let native_dir = dir.join("native");
+    if native_dir.exists() {
+        total_disk_space_by_hash_in_a_dir(&native_dir, &mut total_disk_space)?;
+    }
     total_disk_space_by_hash_in_a_dir(dir, &mut total_disk_space)?;
     Ok(total_disk_space)
 }
@@ -262,7 +266,11 @@ fn remove_not_built_with_in_a_profile(
     total_disk_space += remove_not_matching_in_a_dir(&dir.join("deps"), &keep, dry_run)?;
     // examples is just final artifacts not tracked by fingerprint so skip that one.
     // incremental is not tracked by fingerprint so skip that one.
-    total_disk_space += remove_not_matching_in_a_dir(&dir.join("native"), &keep, dry_run)?;
+    // `native` isn't generated by cargo since 1.37.0
+    let native_dir = dir.join("native");
+    if native_dir.exists() {
+        total_disk_space += remove_not_matching_in_a_dir(&native_dir, &keep, dry_run)?;
+    }
     total_disk_space += remove_not_matching_in_a_dir(dir, &keep, dry_run)?;
     Ok(total_disk_space)
 }