[BUG] Fixes globbing on windows by consolidating on posix-style paths

src/daft-io/src/azure_blob.rs

@@ -381,10 +381,6 @@ impl AzureBlobSource {
 
 #[async_trait]
 impl ObjectSource for AzureBlobSource {
-    fn delimiter(&self) -> &'static str {
-        AZURE_DELIMITER
-    }
-
     async fn get(&self, uri: &str, range: Option<Range<usize>>) -> super::Result<GetResult> {
         let parsed = url::Url::parse(uri).with_context(|_| InvalidUrlSnafu { path: uri })?;
         let container = match parsed.host_str() {

src/daft-io/src/google_cloud.rs

@@ -362,10 +362,6 @@ impl GCSSource {
 
 #[async_trait]
 impl ObjectSource for GCSSource {
-    fn delimiter(&self) -> &'static str {
-        GCS_DELIMITER
-    }
-
     async fn get(&self, uri: &str, range: Option<Range<usize>>) -> super::Result<GetResult> {
         self.client.get(uri, range).await
     }

src/daft-io/src/http.rs

@@ -169,10 +169,6 @@ impl HttpSource {
 
 #[async_trait]
 impl ObjectSource for HttpSource {
-    fn delimiter(&self) -> &'static str {
-        HTTP_DELIMITER
-    }
-
     async fn get(&self, uri: &str, range: Option<Range<usize>>) -> super::Result<GetResult> {
         let request = self.client.get(uri);
         let request = match range {

src/daft-io/src/local.rs

@@ -17,7 +17,11 @@ use std::sync::Arc;
 use tokio::io::{AsyncReadExt, AsyncSeekExt};
 use url::ParseError;
 
-const PLATFORM_FS_DELIMITER: &str = std::path::MAIN_SEPARATOR_STR;
+/// NOTE: We hardcode this even for Windows
+///
+/// For the most part, Windows machines work quite well with POSIX-style paths
+/// as long as there is no "mix" of "\" and "/".
+const PATH_SEGMENT_DELIMITER: &str = "/";
 
 pub(crate) struct LocalSource {}
 
@@ -107,10 +111,6 @@ pub struct LocalFile {
 
 #[async_trait]
 impl ObjectSource for LocalSource {
-    fn delimiter(&self) -> &'static str {
-        PLATFORM_FS_DELIMITER
-    }
-
     async fn get(&self, uri: &str, range: Option<Range<usize>>) -> super::Result<GetResult> {
         const LOCAL_PROTOCOL: &str = "file://";
         if let Some(uri) = uri.strip_prefix(LOCAL_PROTOCOL) {
@@ -148,6 +148,14 @@ impl ObjectSource for LocalSource {
         let fanout_limit = None;
         let page_size = None;
 
+        // If on Windows, the delimiter provided may be "\" which is treated as an escape character by `glob`
+        // We sanitize our filepaths here but note that on-return we will be received POSIX-style paths as well
+        #[cfg(target_env = "msvc")]
+        {
+            let glob_path = glob_path.replace("\\", "/");
+            return glob(self, glob_path.as_str(), fanout_limit, page_size).await;
+        }
+
         glob(self, glob_path, fanout_limit, page_size).await
     }
 
@@ -208,6 +216,15 @@ impl ObjectSource for LocalSource {
                 let entry = entry.with_context(|_| UnableToFetchDirectoryEntriesSnafu {
                     path: uri.to_string(),
                 })?;
+
+                // NOTE: `entry` returned by ReadDirStream can potentially mix posix-delimiters ("/") and windows-delimiter ("\")
+                // on Windows machines if we naively use `entry.path()`. Manually concatting the entries to the uri is safer.
+                let path = format!(
+                    "{}{PATH_SEGMENT_DELIMITER}{}",
+                    uri.trim_end_matches(PATH_SEGMENT_DELIMITER),
+                    entry.file_name().to_string_lossy()
+                );
+
                 let meta = tokio::fs::metadata(entry.path()).await.with_context(|_| {
                     UnableToFetchFileMetadataSnafu {
                         path: entry.path().to_string_lossy().to_string(),
@@ -217,8 +234,12 @@ impl ObjectSource for LocalSource {
                     filepath: format!(
                         "{}{}{}",
                         LOCAL_PROTOCOL,
-                        entry.path().to_string_lossy(),
-                        if meta.is_dir() { self.delimiter() } else { "" }
+                        path,
+                        if meta.is_dir() {
+                            PATH_SEGMENT_DELIMITER
+                        } else {
+                            ""
+                        }
                     ),
                     size: Some(meta.len()),
                     filetype: meta.file_type().try_into().with_context(|_| {
@@ -348,7 +369,7 @@ mod tests {
         write_remote_parquet_to_local_file(&mut file2).await?;
         let mut file3 = tempfile::NamedTempFile::new_in(dir.path()).unwrap();
         write_remote_parquet_to_local_file(&mut file3).await?;
-        let dir_path = format!("file://{}", dir.path().to_string_lossy());
+        let dir_path = format!("file://{}", dir.path().to_string_lossy().replace("\\", "/"));
         let client = LocalSource::get_client().await?;
 
         let ls_result = client.ls(dir_path.as_ref(), true, None, None).await?;
@@ -357,17 +378,29 @@ mod tests {
         files.sort_by(|a, b| a.filepath.cmp(&b.filepath));
         let mut expected = vec![
             FileMetadata {
-                filepath: format!("file://{}", file1.path().to_string_lossy()),
+                filepath: format!(
+                    "file://{}/{}",
+                    dir.path().to_string_lossy().replace("\\", "/"),
+                    file1.path().file_name().unwrap().to_string_lossy(),
+                ),
                 size: Some(file1.as_file().metadata().unwrap().len()),
                 filetype: FileType::File,
             },
             FileMetadata {
-                filepath: format!("file://{}", file2.path().to_string_lossy()),
+                filepath: format!(
+                    "file://{}/{}",
+                    dir.path().to_string_lossy().replace("\\", "/"),
+                    file2.path().file_name().unwrap().to_string_lossy(),
+                ),
                 size: Some(file2.as_file().metadata().unwrap().len()),
                 filetype: FileType::File,
             },
             FileMetadata {
-                filepath: format!("file://{}", file3.path().to_string_lossy()),
+                filepath: format!(
+                    "file://{}/{}",
+                    dir.path().to_string_lossy().replace("\\", "/"),
+                    file3.path().file_name().unwrap().to_string_lossy(),
+                ),
                 size: Some(file3.as_file().metadata().unwrap().len()),
                 filetype: FileType::File,
             },

src/daft-io/src/object_io.rs

@@ -94,9 +94,6 @@ use async_stream::stream;
 
 #[async_trait]
 pub(crate) trait ObjectSource: Sync + Send {
-    /// Returns the delimiter for the platform (S3 vs GCS vs Azure vs local-unix vs Windows etc)
-    fn delimiter(&self) -> &'static str;
-
     async fn get(&self, uri: &str, range: Option<Range<usize>>) -> super::Result<GetResult>;
     async fn get_range(&self, uri: &str, range: Range<usize>) -> super::Result<GetResult> {
         self.get(uri, Some(range)).await

src/daft-io/src/object_store_glob.rs

@@ -18,6 +18,11 @@ lazy_static! {
 
 const SCHEME_SUFFIX_LEN: usize = "://".len();
 
+/// NOTE: Our globbing logic makes very strong assumptions about the delimiter being used to denote
+/// directories. The concept of a "glob" is a Unix concept anyways, and so even for Windows machines
+/// the `glob` utility can only be used with POSIX-style paths.
+const GLOB_DELIMITER: &str = "/";
+
 #[derive(Clone)]
 pub(crate) struct GlobState {
     // Current path in dirtree and glob_fragments
@@ -153,10 +158,7 @@ impl GlobFragment {
 ///   2. Non-wildcard fragments are joined and coalesced by delimiter
 ///   3. The first fragment is prefixed by "{scheme}://"
 ///   4. Preserves any leading delimiters
-pub(crate) fn to_glob_fragments(
-    glob_str: &str,
-    delimiter: &str,
-) -> super::Result<Vec<GlobFragment>> {
+pub(crate) fn to_glob_fragments(glob_str: &str) -> super::Result<Vec<GlobFragment>> {
     // NOTE: We only use the URL parse library to get the scheme, because it will escape some of our glob special characters
     // such as ? and {}
     let glob_url = url::Url::parse(glob_str).map_err(|e| super::Error::InvalidUrl {
@@ -169,8 +171,8 @@ pub(crate) fn to_glob_fragments(
 
     // NOTE: Leading delimiter may be important for absolute paths on local directory, and is considered
     // part of the first fragment
-    let leading_delimiter = if glob_str_after_scheme.starts_with(delimiter) {
-        delimiter
+    let leading_delimiter = if glob_str_after_scheme.starts_with(GLOB_DELIMITER) {
+        GLOB_DELIMITER
     } else {
         ""
     };
@@ -179,7 +181,7 @@ pub(crate) fn to_glob_fragments(
     let mut coalesced_fragments = vec![];
     let mut nonspecial_fragments_so_far = vec![];
     for fragment in glob_str_after_scheme
-        .split(delimiter)
+        .split(GLOB_DELIMITER)
         .map(GlobFragment::new)
     {
         match fragment {
@@ -188,7 +190,7 @@ pub(crate) fn to_glob_fragments(
                 if !nonspecial_fragments_so_far.is_empty() {
                     coalesced_fragments.push(GlobFragment::join(
                         nonspecial_fragments_so_far.drain(..).as_slice(),
-                        delimiter,
+                        GLOB_DELIMITER,
                     ));
                 }
                 coalesced_fragments.push(fragment);
@@ -201,7 +203,7 @@ pub(crate) fn to_glob_fragments(
     if !nonspecial_fragments_so_far.is_empty() {
         coalesced_fragments.push(GlobFragment::join(
             nonspecial_fragments_so_far.drain(..).as_slice(),
-            delimiter,
+            GLOB_DELIMITER,
         ));
     }
 
@@ -293,6 +295,10 @@ async fn ls_with_prefix_fallback(
 /// Uses the `globset` crate for matching, and thus supports all the syntax enabled by that crate.
 /// See: https://docs.rs/globset/latest/globset/#syntax
 ///
+/// NOTE: Users of this function are responsible for sanitizing their paths and delimiters to follow the `globset` crate's expectations
+/// in terms of delimiters. E.g. on Windows machines, callers of [`glob`] must convert all Windows-style "\" delimiters to "/" because
+/// `globset` treats "\" as escape characters.
+///
 /// Arguments:
 /// * source: the ObjectSource to use for file listing
 /// * glob: the string to glob
@@ -306,9 +312,7 @@ pub(crate) async fn glob(
     glob: &str,
     fanout_limit: Option<usize>,
     page_size: Option<i32>,
-) -> super::Result<BoxStream<super::Result<FileMetadata>>> {
-    let delimiter = source.delimiter();
-
+) -> super::Result<BoxStream<'static, super::Result<FileMetadata>>> {
     // If no special characters, we fall back to ls behavior
     let full_fragment = GlobFragment::new(glob);
     if !full_fragment.has_special_character() {
@@ -331,14 +335,14 @@ pub(crate) async fn glob(
 
     // If user specifies a trailing / then we understand it as an attempt to list the folder(s) matched
     // and append a trailing * fragment
-    let glob = if glob.ends_with(source.delimiter()) {
+    let glob = if glob.ends_with(GLOB_DELIMITER) {
         glob.to_string() + "*"
     } else {
         glob.to_string()
     };
     let glob = glob.as_str();
 
-    let glob_fragments = to_glob_fragments(glob, delimiter)?;
+    let glob_fragments = to_glob_fragments(glob)?;
     let full_glob_matcher = GlobBuilder::new(glob)
         .literal_separator(true)
         .backslash_escape(true)
@@ -468,7 +472,7 @@ pub(crate) async fn glob(
                 let partial_glob_matcher = GlobBuilder::new(
                     GlobFragment::join(
                         &state.glob_fragments[..state.current_fragment_idx + 1],
-                        source.delimiter(),
+                        GLOB_DELIMITER,
                     )
                     .raw_str(),
                 )
@@ -492,7 +496,7 @@ pub(crate) async fn glob(
                         Ok(fm) => match fm.filetype {
                             FileType::Directory
                                 if partial_glob_matcher.is_match(
-                                    fm.filepath.as_str().trim_end_matches(source.delimiter()),
+                                    fm.filepath.as_str().trim_end_matches(GLOB_DELIMITER),
                                 ) =>
                             {
                                 visit(

src/daft-io/src/s3_like.rs

@@ -692,10 +692,6 @@ impl S3LikeSource {
 
 #[async_trait]
 impl ObjectSource for S3LikeSource {
-    fn delimiter(&self) -> &'static str {
-        S3_DELIMITER
-    }
-
     async fn get(&self, uri: &str, range: Option<Range<usize>>) -> super::Result<GetResult> {
         let permit = self
             .connection_pool_sema

tests/io/test_list_files_local.py

@@ -27,6 +27,9 @@ def compare_local_result(daft_ls_result: list, fs_result: list):
     # io_glob does not return directories
     fs_files = [(p, t) for p, t in fs_files if t == "file"]
 
+    # io_glob returns posix-style paths
+    fs_files = [(p.replace("\\", "/"), t) for p, t in fs_files]
+
     assert sorted(daft_files) == sorted(fs_files)
 
 
@@ -134,5 +137,5 @@ def test_missing_file_path(tmp_path, include_protocol):
     p = f"{d}/c/cc/ddd"
     if include_protocol:
         p = "file://" + p
-    with pytest.raises(FileNotFoundError, match=f"File: {d}/c/cc/ddd not found"):
+    with pytest.raises(FileNotFoundError, match=f"/c/cc/ddd not found"):
         io_glob(p)