fix: handle relative paths in global builder

Author: roeap

examples/object_store.ipynb

@@ -157,12 +157,12 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.2 (main, Jan 23 2022, 23:15:21) [GCC 9.3.0]"
+   "version": "3.10.6"
   },
   "orig_nbformat": 4,
   "vscode": {
    "interpreter": {
-    "hash": "69ab9af89d9d563f0fb5bfeaa648303cf762996854f981544c3fe8758fe10dff"
+    "hash": "9d6ce819d12cb3dc1d584870253e9f5e189fd2e2773823a6ff4f2c218d69ebab"
    }
   }
  },

object-store/src/builder.rs

@@ -130,10 +130,28 @@ impl ObjectStoreBuilder {
     }
 
     pub fn build(mut self) -> ObjectStoreResult<Arc<DynObjectStore>> {
-        let url = Url::parse(&self.url).map_err(|err| ObjectStoreError::Generic {
-            store: "Generic",
-            source: Box::new(err),
-        })?;
+        let maybe_url = Url::parse(&self.url);
+        let url =
+            match maybe_url {
+                Ok(url) => Ok(url),
+                Err(url::ParseError::RelativeUrlWithoutBase) => {
+                    let abs_path = std::fs::canonicalize(std::path::PathBuf::from(&self.url))
+                        .map_err(|err| ObjectStoreError::Generic {
+                            store: "Generic",
+                            source: Box::new(err),
+                        })?;
+                    Url::parse(&format!("file://{}", abs_path.to_str().unwrap())).map_err(|err| {
+                        ObjectStoreError::Generic {
+                            store: "Generic",
+                            source: Box::new(err),
+                        }
+                    })
+                }
+                Err(err) => Err(ObjectStoreError::Generic {
+                    store: "Generic",
+                    source: Box::new(err),
+                }),
+            }?;
         let root_store = match ObjectStoreKind::parse_url(&url)? {
             ObjectStoreKind::Local => ObjectStoreImpl::Local(LocalFileSystem::new()),
             ObjectStoreKind::InMemory => ObjectStoreImpl::InMemory(InMemory::new()),

object-store/src/file.rs

@@ -28,6 +28,7 @@ impl ArrowFileSystemHandler {
     #[args(options = "None")]
     fn new(root: String, options: Option<HashMap<String, String>>) -> PyResult<Self> {
         let inner = ObjectStoreBuilder::new(root.clone())
+            .with_path_as_prefix(true)
             .with_options(options.clone().unwrap_or_default())
             .build()
             .map_err(ObjectStoreError::from)?;

object-store/src/lib.rs

@@ -230,6 +230,7 @@ impl PyObjectStore {
     /// Create a new ObjectStore instance
     fn new(root: String, options: Option<HashMap<String, String>>) -> PyResult<Self> {
         let inner = ObjectStoreBuilder::new(root.clone())
+            .with_path_as_prefix(true)
             .with_options(options.clone().unwrap_or_default())
             .build()
             .map_err(ObjectStoreError::from)?;