feat: FLAGS_rewrite_prompt_with_search_snippet (#98)

* feat: FLAGS_rewrite_prompt_with_search_snippet

* cleanup

development/Dockerfile

@@ -1 +1,3 @@
 FROM tabbyml/tabby
+
+ARG PYPI_INDEX_URL=https://pypi.org/simple

development/docker-compose.dev.yml

@@ -8,7 +8,6 @@ services:
       dockerfile: ./development/Dockerfile
       args:
         PYPI_INDEX_URL: https://mirrors.aliyun.com/pypi/simple
-        PYTHON_BUILD_MIRROR_URL: https://repo.huaweicloud.com/python
     environment:
       UVICORN_RELOAD: true
       VECTOR_WATCH_CONFIG: true

poetry.lock

@@ -356,6 +356,24 @@ files = [
     {file = "cachetools-5.3.0.tar.gz", hash = "sha256:13dfddc7b8df938c21a940dfa6557ce6e94a2f1cdfa58eb90c805721d58f2c14"},
 ]
 
+[[package]]
+name = "camel-converter"
+version = "3.0.0"
+description = "Converts a string from snake case to camel case or camel case to snake case"
+category = "main"
+optional = false
+python-versions = ">=3.7,<4.0"
+files = [
+    {file = "camel_converter-3.0.0-py3-none-any.whl", hash = "sha256:4b01725c8ccf918752436a8aab595fa153c5123c147225434bf1f40041acb3c7"},
+    {file = "camel_converter-3.0.0.tar.gz", hash = "sha256:7f200e1d1067245f39ae2df6c547dc3de8619060012679702f6471187280e6eb"},
+]
+
+[package.dependencies]
+pydantic = {version = ">=1.8.2", optional = true, markers = "extra == \"pydantic\""}
+
+[package.extras]
+pydantic = ["pydantic (>=1.8.2)"]
+
 [[package]]
 name = "certifi"
 version = "2022.12.7"
@@ -1514,6 +1532,22 @@ files = [
     {file = "mdurl-0.1.2.tar.gz", hash = "sha256:bb413d29f5eea38f31dd4754dd7377d4465116fb207585f97bf925588687c1ba"},
 ]
 
+[[package]]
+name = "meilisearch"
+version = "0.26.0"
+description = "The python client for Meilisearch API."
+category = "main"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "meilisearch-0.26.0-py3-none-any.whl", hash = "sha256:e35ad840a42554b575ddb72c6aa5d9f7202ab2a6777fada5752269fe453379f4"},
+    {file = "meilisearch-0.26.0.tar.gz", hash = "sha256:597ec5eaf6b726428c0e04ecf05af19379aa097093225dab0c6bfb892d03a90d"},
+]
+
+[package.dependencies]
+camel-converter = {version = "*", extras = ["pydantic"]}
+requests = "*"
+
 [[package]]
 name = "mpmath"
 version = "1.3.0"
@@ -3547,4 +3581,4 @@ testing = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10"
-content-hash = "df2b6abe8684f976034d432760b5475e48695b2d2557ca4ddf32cf591c5d4475"
+content-hash = "8ec52f1fb00d48606fd7784f29649d7b9288c2637c6abdd222d331ed61440d96"

pyproject.toml

@@ -22,6 +22,7 @@ peft = {git = "https://github.com/huggingface/peft.git", rev = "v0.2.0"}
 duckdb = "^0.7.1"
 torch = "^2.0.0"
 bitsandbytes = "^0.37.2"
+meilisearch = "^0.26.0"
 
 [tool.poetry.group.dev.dependencies]
 pre-commit = "^3.1.1"

tabby/scripts/flags.sh

@@ -1 +1,5 @@
-export FLAGS_enable_meilisearch=""
+### Experimental feature flags ###
+# export FLAGS_enable_meilisearch="1"
+# export FLAGS_rewrite_prompt_with_search_snippet="1"
+
+### Released feature flags ###

tabby/server/backend/language_presets.py

@@ -1,4 +1,4 @@
-from typing import List
+from typing import List, Optional, Set
 
 from pydantic import BaseModel, Field
 
@@ -8,6 +8,7 @@ from ..models import Language
 class LanguagePreset(BaseModel):
     max_length: int
     stop_words: List[str]
+    reserved_keywords: Optional[Set]
 
 
 LanguagePresets = {
@@ -18,6 +19,45 @@ LanguagePresets = {
     Language.PYTHON: LanguagePreset(
         max_length=128,
         stop_words=["\n\n", "\ndef", "\n#", "\nimport", "\nfrom", "\nclass"],
+        reserved_keywords=set(
+            [
+                "False",
+                "class",
+                "from",
+                "or",
+                "None",
+                "continue",
+                "global",
+                "pass",
+                "True",
+                "def",
+                "if",
+                "raise",
+                "and",
+                "del",
+                "import",
+                "return",
+                "as",
+                "elif",
+                "in",
+                "try",
+                "assert",
+                "else",
+                "is",
+                "while",
+                "async",
+                "except",
+                "lambda",
+                "with",
+                "await",
+                "finally",
+                "nonlocal",
+                "yield",
+                "break",
+                "for",
+                "not",
+            ]
+        ),
     ),
     Language.JAVASCRIPT: LanguagePreset(
         max_length=128, stop_words=["\n\n", "\nfunction", "\n//", "\nimport", "\nclass"]

tabby/server/backend/prompt_rewriter.py

@@ -0,0 +1,74 @@
+import os
+import re
+
+import meilisearch
+from loguru import logger
+
+from .language_presets import LanguagePreset
+
+FLAGS_enable_meilisearch = os.environ.get("FLAGS_enable_meilisearch", None)
+
+
+class PromptRewriter:
+    def __init__(self, meili_addr: str = "http://localhost:8084"):
+        self.meili_client = meilisearch.Client(meili_addr)
+
+    def create_query(self, preset: LanguagePreset, prompt: str):
+        # Remove all punctuations and create tokens.
+        tokens = re.sub(r"[^\w\s]", " ", prompt.lower()).split()
+
+        # Remove short tokens.
+        tokens = [x for x in tokens if len(x) >= 3]
+
+        # Remove tokens in language reserved_keywords.
+        tokens = set([x for x in tokens if x not in preset.reserved_keywords])
+
+        if len(tokens) > 3:
+            return " ".join(tokens)
+        else:
+            raise PromptRewriteFailed("Too few tokens extracted from prompt")
+
+    def rewrite(self, preset: LanguagePreset, prompt: str) -> str:
+        if preset.reserved_keywords is None:
+            raise PromptRewriteFailed("Rewrite requires language keywords list")
+
+        index = self.meili_client.index("dataset")
+        query = self.create_query(preset, prompt)
+        logger.debug("query: {}", query)
+        search_results = index.search(
+            query,
+            {
+                "limit": 3,
+                "attributesToCrop": ["content"],
+                "cropLength": 32,
+                "cropMarker": "",
+                "attributesToRetrieve": ["content"],
+            },
+        )
+
+        if len(search_results["hits"]) == 0:
+            raise PromptRewriteFailed("No related snippets")
+
+        def make_snippet(i, content):
+            content = content["_formatted"]["content"]
+            return f"== snippet {i+1} ==\n{content}"
+
+        snippets = "\n".join(
+            [make_snippet(i, x) for i, x in enumerate(search_results["hits"])]
+        )
+        prompt = f"""Given following relevant code snippet, generate code completion based on context.
+{snippets}
+== context ==
+{prompt}"""
+        logger.debug("prompt: {}", prompt)
+        return prompt
+
+    def __call__(self, preset: LanguagePreset, prompt: str) -> str:
+        try:
+            return self.rewrite(preset, prompt)
+        except PromptRewriteFailed:
+            return prompt
+
+
+class PromptRewriteFailed(Exception):
+    pass

tabby/server/backend/triton.py

@@ -1,3 +1,4 @@
+import os
 import time
 from typing import List
 
@@ -8,8 +9,13 @@ from tritonclient.utils import InferenceServerException, np_to_triton_dtype
 
 from ..models import Choice, CompletionRequest, CompletionResponse
 from .language_presets import LanguagePresets
+from .prompt_rewriter import PromptRewriter
 from .utils import random_completion_id, trim_with_stop_words
 
+FLAGS_rewrite_prompt_with_search_snippet = os.environ.get(
+    "FLAGS_rewrite_prompt_with_search_snippet", None
+)
+
 
 class TritonService:
     def __init__(
@@ -24,6 +30,11 @@ class TritonService:
             url=f"{host}:{port}", verbose=verbose
         )
 
+        if FLAGS_rewrite_prompt_with_search_snippet:
+            self.rewriter = PromptRewriter()
+        else:
+            self.rewriter = None
+
     def generate(self, data: CompletionRequest) -> List[Choice]:
         n = 1
         np_type = np.uint32
@@ -31,7 +42,11 @@ class TritonService:
 
         preset = LanguagePresets[data.language]
 
+        if self.rewriter:
+            prompt = self.rewriter(preset, data.prompt)
+        else:
             prompt = data.prompt
+
         input_start_ids = np.expand_dims(self.tokenizer.encode(prompt), 0)
         input_start_ids = np.repeat(input_start_ids, n, axis=0).astype(np_type)
         prompt_len = input_start_ids.shape[1]

tabby/server/events.py

@@ -14,7 +14,6 @@ def setup_logging(logdir):
         pass
 
     # Remove default handler
-    logger.remove()
     logger.add(
         os.path.join(logdir, "events.{time}.log"),
         rotation="1 hours",