Add translation recipe (#644)

src/fairseq2/recipes/__init__.py

@@ -13,6 +13,7 @@
 from fairseq2.recipes.assets import _setup_asset_cli
 from fairseq2.recipes.llama import _setup_llama_cli
 from fairseq2.recipes.lm import _setup_lm_cli
+from fairseq2.recipes.transformer import _setup_transformer_cli
 from fairseq2.recipes.wav2vec2.asr import _setup_wav2vec2_asr_cli
 
 
@@ -38,6 +39,7 @@ def _setup_cli(cli: Cli) -> None:
     _setup_asset_cli(cli)
     _setup_lm_cli(cli)
     _setup_llama_cli(cli)
+    _setup_transformer_cli(cli)
     _setup_wav2vec2_asr_cli(cli)
 
     # Set up 3rd party CLI extensions.

src/fairseq2/recipes/transformer/__init__.py

@@ -0,0 +1,30 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+from fairseq2.recipes.cli import Cli, RecipeCommandHandler
+from fairseq2.recipes.transformer.translate import (
+    load_text_translator,
+    text_translate_presets,
+)
+
+
+def _setup_transformer_cli(cli: Cli) -> None:
+    group = cli.add_group(
+        "transformer", help="Transformer-based machine translation recipes"
+    )
+
+    # Translate
+    text_translate_handler = RecipeCommandHandler(
+        loader=load_text_translator,
+        preset_configs=text_translate_presets,
+        default_preset="nllb_dense_600m",
+    )
+
+    group.add_command(
+        name="translate",
+        handler=text_translate_handler,
+        help="translate text",
+    )