Make OSSFileSystem works again (#1723)

* make ossfs work again

* make ossfs work again

* make ossfs work again

* fix code style

Author: wujinhu

tensorflow_io/BUILD

@@ -46,7 +46,6 @@ cc_binary(
             "//tensorflow_io/core:elasticsearch_ops",
             "//tensorflow_io/core:genome_ops",
             "//tensorflow_io/core:optimization",
-            "//tensorflow_io/core:oss_ops",
             "//tensorflow_io/core/kernels/gsmemcachedfs:gs_memcached_file_system",
         ],
     }) + select({

tensorflow_io/core/BUILD

@@ -707,22 +707,6 @@ cc_library(
     alwayslink = 1,
 )
 
-cc_library(
-    name = "oss_ops",
-    srcs = [
-        "kernels/oss/oss_file_system.cc",
-        "kernels/oss/oss_file_system.h",
-    ],
-    copts = tf_io_copts(),
-    linkstatic = True,
-    deps = [
-        "@aliyun_oss_c_sdk",
-        "@local_config_tf//:libtensorflow_framework",
-        "@local_config_tf//:tf_header_lib",
-    ],
-    alwayslink = 1,
-)
-
 cc_library(
     name = "sql_ops",
     srcs = [

tensorflow_io/core/filesystems/BUILD

@@ -38,6 +38,7 @@ cc_library(
         "//tensorflow_io/core/filesystems/az",
         "//tensorflow_io/core/filesystems/hdfs",
         "//tensorflow_io/core/filesystems/http",
+        "//tensorflow_io/core/filesystems/oss",
         "//tensorflow_io/core/filesystems/s3",
     ],
     alwayslink = 1,

tensorflow_io/core/filesystems/filesystem_plugins.cc

@@ -29,7 +29,7 @@ limitations under the License.
 TFIO_PLUGIN_EXPORT void TF_InitPlugin(TF_FilesystemPluginInfo* info) {
   info->plugin_memory_allocate = tensorflow::io::plugin_memory_allocate;
   info->plugin_memory_free = tensorflow::io::plugin_memory_free;
-  info->num_schemes = 7;
+  info->num_schemes = 8;
   info->ops = static_cast<TF_FilesystemPluginOps*>(
       tensorflow::io::plugin_memory_allocate(info->num_schemes *
                                              sizeof(info->ops[0])));
@@ -40,4 +40,5 @@ TFIO_PLUGIN_EXPORT void TF_InitPlugin(TF_FilesystemPluginInfo* info) {
   tensorflow::io::hdfs::ProvideFilesystemSupportFor(&info->ops[4], "hdfs");
   tensorflow::io::hdfs::ProvideFilesystemSupportFor(&info->ops[5], "viewfs");
   tensorflow::io::hdfs::ProvideFilesystemSupportFor(&info->ops[6], "har");
+  tensorflow::io::oss::ProvideFilesystemSupportFor(&info->ops[7], "oss");
 }

tensorflow_io/core/filesystems/filesystem_plugins.h

@@ -50,6 +50,12 @@ void ProvideFilesystemSupportFor(TF_FilesystemPluginOps* ops, const char* uri);
 
 }  // namespace s3
 
+namespace oss {
+
+void ProvideFilesystemSupportFor(TF_FilesystemPluginOps* ops, const char* uri);
+
+}  // namespace oss
+
 }  // namespace io
 }  // namespace tensorflow
 

tensorflow_io/core/filesystems/oss/BUILD

@@ -0,0 +1,24 @@
+licenses(["notice"])  # Apache 2.0
+
+package(default_visibility = ["//visibility:public"])
+
+load(
+    "//:tools/build/tensorflow_io.bzl",
+    "tf_io_copts",
+)
+
+cc_library(
+    name = "oss",
+    srcs = [
+        "oss_filesystem.cc",
+        "oss_filesystem.h",
+    ],
+    copts = tf_io_copts(),
+    linkstatic = True,
+    deps = [
+        "//tensorflow_io/core/filesystems:filesystem_plugins_header",
+        "@aliyun_oss_c_sdk",
+        "@local_config_tf//:tf_header_lib",
+    ],
+    alwayslink = 1,
+)