tbdev turndown: replace dev subcommand with shim

tensorboard/BUILD

@@ -29,12 +29,12 @@ py_binary(
         ":assets_lib",  # link dep for webfiles assets
         ":default",
         ":dynamic_plugins",  # loads internal dynamic plugin like projector
+        ":legacy_tbdev_subcommand",
         ":lib",
         ":main_lib",
         ":program",
         "//tensorboard:expect_tensorflow_installed",
         "//tensorboard/plugins:base_plugin",
-        "//tensorboard/uploader:uploader_subcommand",
         "//tensorboard/util:tb_logging",
         "//tensorboard/util:timing",  # non-strict dep, for patching convenience
     ],
@@ -59,10 +59,10 @@ py_binary(
     deps = [
         ":default",
         ":dynamic_plugins",  # loads internal dynamic plugin like projector
+        ":legacy_tbdev_subcommand",
         ":lib",
         ":main_lib",
         ":program",
-        "//tensorboard/uploader:uploader_subcommand",
     ],
 )
 
@@ -647,3 +647,9 @@ py_test(
     tags = ["support_notf"],
     deps = [":lazy"],
 )
+
+py_library(
+    name = "legacy_tbdev_subcommand",
+    srcs = ["legacy_tbdev_subcommand.py"],
+    srcs_version = "PY3",
+)

tensorboard/legacy_tbdev_subcommand.py

@@ -0,0 +1,47 @@
+# Copyright 2023 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+"""Legacy `tensorboard dev` implementation to print shutdown info."""
+
+import sys
+
+from tensorboard import program
+
+
+_SHUTDOWN_MESSAGE = """\
+======================================================================
+ERROR: This command is no longer operational and will be removed.
+
+TensorBoard.dev has been shut down. For further information,
+see the FAQ at <https://tensorboard.dev/>.
+======================================================================
+"""
+
+
+class LegacyTbdevSubcommand(program.TensorBoardSubcommand):
+    """Legacy `tensorboard dev` implementation to print shutdown info."""
+
+    def name(self):
+        return "dev"
+
+    def define_flags(self, parser):
+        pass  # no flags to define
+
+    def run(self, flags):
+        sys.stderr.write(_SHUTDOWN_MESSAGE)
+        sys.stderr.flush()
+        sys.exit(1)
+
+    def help(self):
+        return ""  # omit help to avoid suggesting users should try it

tensorboard/main.py

@@ -25,10 +25,10 @@
 
 from absl import app
 from tensorboard import default
+from tensorboard import legacy_tbdev_subcommand
 from tensorboard import main_lib
 from tensorboard import program
 from tensorboard.plugins import base_plugin
-from tensorboard.uploader import uploader_subcommand
 from tensorboard.util import tb_logging
 
 logger = tb_logging.get_logger()
@@ -40,7 +40,7 @@ def run_main():
 
     tensorboard = program.TensorBoard(
         plugins=default.get_plugins(),
-        subcommands=[uploader_subcommand.UploaderSubcommand()],
+        subcommands=[legacy_tbdev_subcommand.LegacyTbdevSubcommand()],
     )
     try:
         app.run(tensorboard.main, flags_parser=tensorboard.configure)

tensorboard/main_dev.py

@@ -19,10 +19,10 @@
 
 from absl import app
 from tensorboard import default
+from tensorboard import legacy_tbdev_subcommand
 from tensorboard import main_lib
 from tensorboard import program
 from tensorboard.plugins import base_plugin
-from tensorboard.uploader import uploader_subcommand
 
 
 def run_main():
@@ -33,7 +33,7 @@ def run_main():
     tensorboard = program.TensorBoard(
         plugins=default.get_plugins(),
         assets_zip_provider=lambda: open(path, "rb"),
-        subcommands=[uploader_subcommand.UploaderSubcommand()],
+        subcommands=[legacy_tbdev_subcommand.LegacyTbdevSubcommand()],
     )
 
     try: