feat(logging): add configurable logging with file output support

Introduce --log-level and --log-file CLI arguments.
Add execution time tracking and detailed logs across all modules.

README.md

@@ -39,6 +39,8 @@ GEMINI_MODEL=gemini-2.5-flash
 - `--model`: 临时覆盖 `.env` 里的模型名
 - `--skip-analysis`: 只做复制、清理和剪枝，不调用 Gemini
 - `--force`: 允许覆盖已有输出目录
+- `--log-level`: 日志级别，支持 `DEBUG` / `INFO` / `WARNING` / `ERROR` / `CRITICAL`
+- `--log-file`: 把完整日志同时写入文件，便于回溯扫描、剪枝和 Gemini 分析过程
 
 ## 输出内容
 
@@ -60,3 +62,24 @@ GEMINI_MODEL=gemini-2.5-flash
 - 只解析能静态识别出来的 `Invoke Workflow` / `Invoke VBA` 文件路径。
 - 对动态拼接路径会记录 warning，但不会猜测。
 - `Invoke VBA` 默认识别常见文本型 VBA 文件扩展名：`.txt`、`.bas`、`.vb`、`.vbs`、`.vba`、`.cls`、`.frm`。
+
+## 日志说明
+
+运行时默认输出 `INFO` 级别日志，会记录：
+
+- CLI 启动参数、配置加载结果、是否启用 Gemini
+- 依赖扫描开始/结束、文件数量、warning 数量
+- 复制、清理 Comment Out、二次扫描、剪枝、生成文档等阶段摘要
+
+如果需要看更细的文件级排查信息，直接把日志级别调到 `DEBUG`：
+
+```bash
+./.venv/bin/python -m uipath_explainator \
+  /path/to/uipath-project \
+  --output-dir workspace/project-bundle \
+  --log-level DEBUG \
+  --log-file workspace/project-bundle/run.log \
+  --force
+```
+
+`DEBUG` 会额外记录每个文件的复制、依赖解析、路径解析、剪枝、分析文档写出等细节。

src/uipath_explainator/cli.py

@@ -2,12 +2,17 @@ from __future__ import annotations
 
 from argparse import ArgumentParser
 from pathlib import Path
+import logging
 
 from .config import Settings
 from .gemini import GeminiAnalyzer
+from .logging_utils import configure_logging
 from .pipeline import ProjectPipeline
 
 
+logger = logging.getLogger(__name__)
+
+
 def build_parser() -> ArgumentParser:
     parser = ArgumentParser(description="Extract and explain UiPath project dependencies.")
     parser.add_argument("project_dir", type=Path, help="UiPath project root directory")
@@ -22,6 +27,13 @@ def build_parser() -> ArgumentParser:
     parser.add_argument("--model", help="Override GEMINI_MODEL")
     parser.add_argument("--skip-analysis", action="store_true", help="Skip Gemini analysis and only prepare files")
     parser.add_argument("--force", action="store_true", help="Overwrite the output directory if it already exists")
+    parser.add_argument(
+        "--log-level",
+        default="INFO",
+        choices=["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"],
+        help="Logging verbosity",
+    )
+    parser.add_argument("--log-file", type=Path, help="Optional file path to write logs to")
     return parser
 
 
@@ -37,7 +49,25 @@ def main(argv: list[str] | None = None) -> int:
     if not output_dir.is_absolute():
         output_dir = Path.cwd() / output_dir
 
-    settings = Settings.from_env(args.env_file if args.env_file.exists() else None, model_override=args.model)
+    log_file = args.log_file.expanduser() if args.log_file else None
+    if log_file is not None and not log_file.is_absolute():
+        log_file = Path.cwd() / log_file
+    configure_logging(level_name=args.log_level, log_file=log_file)
+
+    logger.info(
+        "Starting CLI run: project_root=%s output_dir=%s entry=%s analysis=%s",
+        project_root,
+        output_dir,
+        args.entry,
+        not args.skip_analysis,
+    )
+
+    env_file = args.env_file if args.env_file.exists() else None
+    if args.env_file and env_file is None:
+        logger.warning("Environment file not found, falling back to default dotenv lookup: %s", args.env_file)
+
+    try:
+        settings = Settings.from_env(env_file, model_override=args.model)
         analyzer = None if args.skip_analysis else GeminiAnalyzer(settings)
 
         pipeline = ProjectPipeline(
@@ -47,6 +77,9 @@ def main(argv: list[str] | None = None) -> int:
             force=args.force,
         )
         report = pipeline.run(analyzer=analyzer)
+    except Exception:
+        logger.exception("CLI run failed")
+        return 1
 
     print(f"Output written to: {report.output_root}")
     print(f"Code written to: {report.code_root}")

src/uipath_explainator/config.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 from dataclasses import dataclass
 from pathlib import Path
+import logging
 import re
 from typing import Self
 
@@ -9,6 +10,9 @@ from dotenv import load_dotenv
 import os
 
 
+logger = logging.getLogger(__name__)
+
+
 @dataclass(slots=True)
 class Settings:
     api_key: str | None
@@ -18,19 +22,29 @@ class Settings:
     @classmethod
     def from_env(cls, env_file: Path | None = None, model_override: str | None = None) -> Self:
         if env_file:
+            logger.info("Loading environment variables from %s", env_file)
             load_dotenv(env_file)
         else:
+            logger.debug("Loading environment variables using default dotenv lookup")
             load_dotenv()
 
-        return cls(
+        settings = cls(
             api_key=os.getenv("GEMINI_API_KEY") or os.getenv("GOOGLE_API_KEY"),
             base_url=os.getenv("GEMINI_BASE_URL") or None,
             model=model_override or os.getenv("GEMINI_MODEL") or "gemini-2.5-flash",
         )
+        logger.info(
+            "Configuration loaded: model=%s base_url=%s api_key=%s",
+            settings.model,
+            settings.normalized_base_url() or "<default>",
+            "set" if settings.api_key else "missing",
+        )
+        return settings
 
     def require_api_key(self) -> None:
         if not self.api_key:
             raise ValueError("Missing GEMINI_API_KEY (or GOOGLE_API_KEY) in the environment.")
+        logger.debug("Gemini API key is available")
 
     def normalized_base_url(self) -> str | None:
         if not self.base_url:

src/uipath_explainator/gemini.py

@@ -4,11 +4,14 @@ from dataclasses import dataclass, field
 from pathlib import Path
 from typing import Any
 import json
+import logging
+from time import perf_counter
 
 from .config import Settings
 
 
 UNKNOWN_TEXT = "无法从当前文件确定"
+logger = logging.getLogger(__name__)
 
 
 @dataclass(slots=True)
@@ -30,8 +33,15 @@ class GeminiAnalyzer:
 
         self._types = types
         self._client = genai.Client(api_key=self.settings.api_key, http_options=http_options)
+        logger.info(
+            "Gemini analyzer initialized: model=%s base_url=%s",
+            self.settings.model,
+            base_url or "<default>",
+        )
 
     def analyze(self, relative_path: Path, content: str) -> str:
+        started = perf_counter()
+        logger.info("Submitting Gemini analysis for %s (%d chars)", relative_path.as_posix(), len(content))
         prompt = self._build_prompt(relative_path, content)
         response = self._client.models.generate_content(
             model=self.settings.model,
@@ -43,7 +53,26 @@ class GeminiAnalyzer:
             ),
         )
 
-        payload = json.loads(response.text)
+        response_text = response.text or ""
+        logger.debug(
+            "Gemini response received for %s (%d chars)",
+            relative_path.as_posix(),
+            len(response_text),
+        )
+        try:
+            payload = json.loads(response_text)
+        except json.JSONDecodeError:
+            logger.exception(
+                "Gemini returned invalid JSON for %s. Response snippet: %r",
+                relative_path.as_posix(),
+                response_text[:500],
+            )
+            raise
+        logger.info(
+            "Gemini analysis completed for %s in %.2fs",
+            relative_path.as_posix(),
+            perf_counter() - started,
+        )
         return self._to_markdown(relative_path, payload)
 
     def _response_schema(self) -> dict[str, Any]:

src/uipath_explainator/logging_utils.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+from pathlib import Path
+import logging
+
+
+LOG_FORMAT = "%(asctime)s %(levelname)s [%(name)s] %(message)s"
+
+
+def configure_logging(level_name: str = "INFO", log_file: Path | None = None) -> None:
+    level = getattr(logging, level_name.upper(), logging.INFO)
+    formatter = logging.Formatter(LOG_FORMAT)
+
+    handlers: list[logging.Handler] = [logging.StreamHandler()]
+    if log_file is not None:
+        log_file.parent.mkdir(parents=True, exist_ok=True)
+        handlers.append(logging.FileHandler(log_file, encoding="utf-8"))
+
+    root_logger = logging.getLogger()
+    root_logger.handlers.clear()
+    root_logger.setLevel(level)
+
+    for handler in handlers:
+        handler.setLevel(level)
+        handler.setFormatter(formatter)
+        root_logger.addHandler(handler)
+
+    logging.captureWarnings(True)

src/uipath_explainator/pipeline.py

@@ -4,10 +4,15 @@ from dataclasses import dataclass
 from pathlib import Path
 from shutil import copy2, rmtree
 import json
+import logging
+from time import perf_counter
 
 from .scanner import ScanResult, crawl_dependencies, find_entry_file, read_text, strip_comment_out_blocks
 
 
+logger = logging.getLogger(__name__)
+
+
 @dataclass(slots=True)
 class PipelineReport:
     project_root: Path
@@ -52,19 +57,41 @@ class ProjectPipeline:
         self.force = force
 
     def run(self, analyzer=None) -> PipelineReport:
+        started = perf_counter()
+        logger.info(
+            "Starting pipeline: project_root=%s output_root=%s entry=%s analysis=%s force=%s",
+            self.project_root,
+            self.output_root,
+            self.entry_name,
+            analyzer is not None,
+            self.force,
+        )
         entry_file = find_entry_file(self.project_root, self.entry_name)
         entry_rel = entry_file.relative_to(self.project_root)
+        logger.debug("Using entry file %s", entry_rel.as_posix())
 
         initial_scan = crawl_dependencies(self.project_root, entry_file)
         initial_rel_files = self._relative_files(initial_scan, self.project_root)
+        logger.info(
+            "Initial scan complete: files=%d warnings=%d",
+            len(initial_rel_files),
+            len(initial_scan.warnings),
+        )
 
         self._prepare_output_root()
         self._copy_files(initial_rel_files)
         cleaned_files = self._clean_copied_xaml_files(initial_rel_files)
+        logger.info("Copied %d files and cleaned %d XAML files", len(initial_rel_files), len(cleaned_files))
 
         final_scan = crawl_dependencies(self.code_root, self.code_root / entry_rel)
         final_rel_files = self._relative_files(final_scan, self.code_root)
         pruned_files = self._prune_unused_files(initial_rel_files, final_rel_files)
+        logger.info(
+            "Final scan complete: files=%d warnings=%d pruned=%d",
+            len(final_rel_files),
+            len(final_scan.warnings),
+            len(pruned_files),
+        )
 
         analysis_files = self._write_analysis(final_rel_files, analyzer)
         warnings = initial_scan.warnings + final_scan.warnings
@@ -83,15 +110,24 @@ class ProjectPipeline:
             analysis_files=analysis_files,
         )
         self._write_report_files(report)
+        logger.info(
+            "Pipeline completed in %.2fs: final_files=%d analysis_files=%d warnings=%d",
+            perf_counter() - started,
+            len(report.final_files),
+            len(report.analysis_files),
+            len(report.warnings),
+        )
         return report
 
     def _prepare_output_root(self) -> None:
         if self.output_root.exists():
             if not self.force:
                 raise FileExistsError(f"Output directory already exists: {self.output_root}")
+            logger.info("Removing existing output directory because force=True: %s", self.output_root)
             rmtree(self.output_root)
         self.code_root.mkdir(parents=True, exist_ok=True)
         self.docs_root.mkdir(parents=True, exist_ok=True)
+        logger.debug("Prepared output directories: code=%s docs=%s", self.code_root, self.docs_root)
 
     def _copy_files(self, relative_files: list[Path]) -> None:
         for relative_path in relative_files:
@@ -99,6 +135,7 @@ class ProjectPipeline:
             destination = self.code_root / relative_path
             destination.parent.mkdir(parents=True, exist_ok=True)
             copy2(source, destination)
+            logger.debug("Copied file: %s -> %s", source, destination)
 
     def _clean_copied_xaml_files(self, relative_files: list[Path]) -> list[Path]:
         cleaned: list[Path] = []
@@ -111,6 +148,7 @@ class ProjectPipeline:
             if updated != original:
                 output_file.write_text(updated, encoding="utf-8")
                 cleaned.append(relative_path)
+                logger.debug("Removed CommentOut blocks from %s", output_file)
         return cleaned
 
     def _prune_unused_files(self, initial_files: list[Path], final_files: list[Path]) -> list[Path]:
@@ -123,6 +161,7 @@ class ProjectPipeline:
             if target.exists():
                 target.unlink()
                 pruned.append(relative_path)
+                logger.debug("Pruned unreachable file: %s", target)
         self._cleanup_empty_dirs()
         return pruned
 
@@ -136,9 +175,11 @@ class ProjectPipeline:
             if any(directory.iterdir()):
                 continue
             directory.rmdir()
+            logger.debug("Removed empty directory: %s", directory)
 
     def _write_analysis(self, final_files: list[Path], analyzer) -> list[Path]:
         if analyzer is None:
+            logger.info("Skipping Gemini analysis because analyzer is disabled")
             return []
 
         output_files: list[Path] = []
@@ -149,11 +190,13 @@ class ProjectPipeline:
             analysis_path.parent.mkdir(parents=True, exist_ok=True)
             analysis_path.write_text(analysis, encoding="utf-8")
             output_files.append(Path(f"{relative_path.as_posix()}.analysis.md"))
+            logger.debug("Wrote analysis file: %s", analysis_path)
         return output_files
 
     def _write_report_files(self, report: PipelineReport) -> None:
         (self.docs_root / "manifest.json").write_text(report.to_json(), encoding="utf-8")
         (self.docs_root / "OVERVIEW.md").write_text(self._build_overview(report), encoding="utf-8")
+        logger.debug("Wrote report files to %s", self.docs_root)
 
     def _build_overview(self, report: PipelineReport) -> str:
         warnings = "\n".join(f"- {item}" for item in report.warnings) or "- 无"

src/uipath_explainator/scanner.py

@@ -4,6 +4,7 @@ from collections import deque
 from dataclasses import dataclass, field
 from pathlib import Path
 import html
+import logging
 import re
 import xml.etree.ElementTree as ET
 
@@ -15,6 +16,7 @@ TAG_PATTERN = re.compile(
     r"<(?P<close>/)?(?P<name>[A-Za-z_][\w:.-]*)(?P<body>[^<>]*?)(?P<self>/)?>",
     re.DOTALL,
 )
+logger = logging.getLogger(__name__)
 
 
 @dataclass(slots=True, frozen=True)
@@ -81,30 +83,37 @@ def _find_comment_end(text: str, start: re.Match[str]) -> int:
 
 
 def find_entry_file(project_root: Path, entry_name: str) -> Path:
+    logger.debug("Resolving entry file %s within %s", entry_name, project_root)
     direct = project_root / entry_name
     if direct.exists():
+        logger.info("Entry file resolved directly: %s", direct)
         return direct
 
     target = entry_name.lower()
     for child in project_root.iterdir():
         if child.is_file() and child.name.lower() == target:
+            logger.info("Entry file resolved case-insensitively: %s", child)
             return child
     raise FileNotFoundError(f"Entry file not found: {entry_name}")
 
 
 def crawl_dependencies(project_root: Path, entry_file: Path) -> ScanResult:
+    logger.info("Starting dependency crawl from %s", entry_file)
     result = ScanResult()
     queue: deque[Path] = deque([entry_file])
     visited: set[Path] = set()
 
     while queue:
         current = queue.popleft()
+        logger.debug("Dequeued file for scan: %s", current)
         if current in visited:
+            logger.debug("Skipping already visited file: %s", current)
             continue
         visited.add(current)
         result.files.add(current)
 
         if current.suffix.lower() != ".xaml":
+            logger.debug("Skipping recursive scan for non-XAML file: %s", current)
             continue
 
         dependencies, warnings = extract_dependencies(project_root, current)
@@ -114,12 +123,24 @@ def crawl_dependencies(project_root: Path, entry_file: Path) -> ScanResult:
         for dependency in dependencies:
             result.files.add(dependency.target)
             if dependency.kind == "workflow":
+                logger.debug(
+                    "Queueing workflow dependency: %s -> %s",
+                    current,
+                    dependency.target,
+                )
                 queue.append(dependency.target)
 
+    logger.info(
+        "Dependency crawl complete: files=%d dependency_sources=%d warnings=%d",
+        len(result.files),
+        len(result.dependencies),
+        len(result.warnings),
+    )
     return result
 
 
 def extract_dependencies(project_root: Path, file_path: Path) -> tuple[list[Dependency], list[str]]:
+    logger.debug("Extracting dependencies from %s", file_path)
     text = read_text(file_path)
     warnings: list[str] = []
     dependencies: list[Dependency] = []
@@ -127,7 +148,9 @@ def extract_dependencies(project_root: Path, file_path: Path) -> tuple[list[Depe
     try:
         root = ET.fromstring(text)
     except ET.ParseError as exc:
-        return [], [f"{file_path}: XML parse failed: {exc}"]
+        warning = f"{file_path}: XML parse failed: {exc}"
+        logger.warning(warning)
+        return [], [warning]
 
     for element in root.iter():
         activity_type = classify_invoke_activity(local_name(element.tag))
@@ -136,17 +159,26 @@ def extract_dependencies(project_root: Path, file_path: Path) -> tuple[list[Depe
 
         literals = extract_literal_targets(element, activity_type)
         if not literals:
-            warnings.append(
+            warning = f"{file_path}: unable to statically resolve {activity_type} path from <{local_name(element.tag)}>"
-                f"{file_path}: unable to statically resolve {activity_type} path from <{local_name(element.tag)}>"
+            warnings.append(warning)
-            )
+            logger.warning(warning)
             continue
 
         for literal in literals:
             target = resolve_project_path(project_root, file_path, literal)
             if target is None:
-                warnings.append(f"{file_path}: referenced file not found for {activity_type}: {literal}")
+                warning = f"{file_path}: referenced file not found for {activity_type}: {literal}"
+                warnings.append(warning)
+                logger.warning(warning)
                 continue
             dependencies.append(Dependency(activity_type, literal, file_path, target))
+            logger.debug(
+                "Resolved %s dependency: source=%s literal=%s target=%s",
+                activity_type,
+                file_path,
+                literal,
+                target,
+            )
 
     return _dedupe_dependencies(dependencies), warnings
 
@@ -217,7 +249,15 @@ def resolve_project_path(project_root: Path, source_file: Path, literal: str) ->
     for base in search_roots:
         resolved = (base / candidate).resolve()
         if resolved.exists() and _is_within_root(project_root.resolve(), resolved):
+            logger.debug(
+                "Resolved literal path %s from %s using base %s -> %s",
+                literal,
+                source_file,
+                base,
+                resolved,
+            )
             return resolved
+    logger.debug("Failed to resolve literal path %s from %s", literal, source_file)
     return None
 
 

tests/test_pipeline.py

@@ -122,6 +122,29 @@ class PipelineTests(unittest.TestCase):
             self.assertIn("Code Root", overview)
             self.assertIn("Docs Root", overview)
 
+    def test_pipeline_emits_stage_logs(self) -> None:
+        with TemporaryDirectory() as tmp:
+            tmp_path = Path(tmp)
+            project_root = tmp_path / "project"
+            output_root = tmp_path / "workspace"
+            (project_root / "Flows").mkdir(parents=True)
+            (project_root / "Flows" / "Active.xaml").write_text(ACTIVE_XAML, encoding="utf-8")
+            (project_root / "Flows" / "Old.xaml").write_text(OLD_XAML, encoding="utf-8")
+            (project_root / "Scripts").mkdir()
+            (project_root / "Scripts" / "Keep.bas").write_text("Sub Keep()\nEnd Sub", encoding="utf-8")
+            (project_root / "Scripts" / "Drop.bas").write_text("Sub Drop()\nEnd Sub", encoding="utf-8")
+            (project_root / "main.xaml").write_text(MAIN_XAML, encoding="utf-8")
+
+            with self.assertLogs("uipath_explainator", level="INFO") as captured:
+                ProjectPipeline(project_root, output_root, "main.xaml", force=True).run(StubAnalyzer())
+
+            combined = "\n".join(captured.output)
+            self.assertIn("Starting pipeline:", combined)
+            self.assertIn("Initial scan complete:", combined)
+            self.assertIn("Copied 5 files and cleaned 1 XAML files", combined)
+            self.assertIn("Final scan complete:", combined)
+            self.assertIn("Pipeline completed in", combined)
+
 
 if __name__ == "__main__":
     unittest.main()