rust: create multi-file run loader

tensorboard/data/server/BUILD

@@ -31,6 +31,7 @@ rust_library(
         "event_file.rs",
         "masked_crc.rs",
         "reservoir.rs",
+        "run.rs",
         "scripted_reader.rs",
         "tf_record.rs",
         "types.rs",
@@ -50,6 +51,9 @@ rust_library(
 rust_test(
     name = "rustboard_core_test",
     crate = ":rustboard_core",
+    deps = [
+        "//third_party/rust:tempfile",
+    ],
 )
 
 rust_doc_test(

tensorboard/data/server/data_compat.rs

@@ -18,7 +18,7 @@ limitations under the License.
 use crate::proto::tensorboard as pb;
 use pb::{summary::value::Value, summary_metadata::PluginData};
 
-const SCALARS_PLUGIN_NAME: &str = "scalars";
+pub(crate) const SCALARS_PLUGIN_NAME: &str = "scalars";
 
 /// Determines the metadata for a time series given its first event.
 ///

tensorboard/data/server/lib.rs

@@ -19,6 +19,7 @@ pub mod data_compat;
 pub mod event_file;
 pub mod masked_crc;
 pub mod reservoir;
+pub mod run;
 pub mod tf_record;
 pub mod types;