Remove colors from log capture, and reset log every run

aocsync.py

@@ -359,6 +359,27 @@ class GitManager:
 class CargoAOCRunner:
     """Runs cargo-aoc benchmarks and parses results"""
     
+    @staticmethod
+    def _strip_ansi_codes(text: str) -> str:
+        """Remove ANSI escape codes from text"""
+        import re
+        if not text:
+            return text
+        # Remove ANSI escape sequences - comprehensive pattern
+        # This pattern matches all ANSI escape codes including:
+        # - ESC[...m (SGR/color codes)
+        # - ESC[...K (EL codes)
+        # - ESC[...H (cursor positioning)
+        # - ESC[38;5;...m (256-color codes)
+        # - ESC[0m, ESC[1m, etc.
+        ansi_escape = re.compile(r'\x1b\[[0-9;]*[a-zA-Z]')
+        # Also catch standalone ESC sequences
+        ansi_escape2 = re.compile(r'\x1b(?:[@-Z\\-_]|\[[0-?]*[ -/]*[@-~])')
+        # Remove all ANSI codes
+        text = ansi_escape.sub('', text)
+        text = ansi_escape2.sub('', text)
+        return text
+    
     @staticmethod
     def find_implemented_days(work_dir: Path) -> List[int]:
         """Find which days are implemented in the directory
@@ -533,6 +554,10 @@ class CargoAOCRunner:
                 # Write to log file if provided
                 if log_file:
                     timestamp = datetime.now().isoformat()
+                    # Strip ANSI codes from output before writing
+                    stdout_clean = CargoAOCRunner._strip_ansi_codes(result.stdout or "")
+                    stderr_clean = CargoAOCRunner._strip_ansi_codes(result.stderr or "")
+                    
                     with open(log_file, 'a', encoding='utf-8') as f:
                         f.write(f"\n{'='*80}\n")
                         f.write(f"[{timestamp}] {user} - Year {year} - Day {day}\n")
@@ -540,13 +565,13 @@ class CargoAOCRunner:
                         f.write(f"Working Directory: {work_dir}\n")
                         f.write(f"Return Code: {result.returncode}\n")
                         f.write(f"{'='*80}\n")
-                        if result.stdout:
+                        if result.stdout:  # Check original, write cleaned version
                             f.write("STDOUT:\n")
-                            f.write(result.stdout)
+                            f.write(stdout_clean)
                             f.write("\n")
-                        if result.stderr:
+                        if result.stderr:  # Check original, write cleaned version
                             f.write("STDERR:\n")
-                            f.write(result.stderr)
+                            f.write(stderr_clean)
                             f.write("\n")
                         f.write(f"{'='*80}\n\n")
                 
@@ -558,9 +583,13 @@ class CargoAOCRunner:
                 if not result.stdout.strip() and not result.stderr.strip():
                     logger.warning(f"No output from cargo aoc for {user} year {year} day {day}")
                 
+                # Strip ANSI codes before parsing (for cleaner parsing)
+                stdout_clean = CargoAOCRunner._strip_ansi_codes(result.stdout or "")
+                stderr_clean = CargoAOCRunner._strip_ansi_codes(result.stderr or "")
+                
                 # Parse output for runtime information
                 day_results = CargoAOCRunner._parse_runtime_output(
-                    result.stdout, result.stderr, day, year, user, git_rev, repo_url
+                    stdout_clean, stderr_clean, day, year, user, git_rev, repo_url
                 )
                 if day_results:
                     logger.info(f"Parsed {len(day_results)} runtime result(s) for {user} year {year} day {day}")
@@ -1852,6 +1881,15 @@ class AOCSync:
         """Sync all repositories"""
         logger.info("Starting sync of all repositories...")
         
+        # Clear log file at start of sync
+        log_file = Path(self.config.output_dir) / 'cargo-aoc.log'
+        log_file.parent.mkdir(parents=True, exist_ok=True)
+        # Clear the log file and write a header
+        with open(log_file, 'w', encoding='utf-8') as f:
+            f.write(f"{'#'*80}\n")
+            f.write(f"# Sync started at {datetime.now().isoformat()}\n")
+            f.write(f"{'#'*80}\n\n")
+        
         for repo_config in self.config.repositories:
             user_name = repo_config['name']
             try: