Optimize

converter/convert_all.py

@@ -10,7 +10,7 @@ Usage:
     python converter/convert_all.py
     (or via Makefile: make shows)
 
-Show 0 is always 'blue_pulse' — the home/reset show.
+Show 0 is always 'blue_breath' — the home/reset show.
 All other shows are sorted alphabetically and follow after it.
 
 SPDX-License-Identifier: BSD-2-Clause
@@ -36,16 +36,6 @@ STEP_PATTERN = re.compile(r'^\s*#([0-9A-Fa-f]{6})\s*,\s*(\d+)')
 
 # ---- Helpers -----------------------------------------------------------
 
-def parse_mode(filepath: Path) -> str:
-    """Return the C mode constant for this show. Defaults to SHOW_LOOP."""
-    with open(filepath) as f:
-        for line in f:
-            m = re.match(r'^\s*//\s*mode:\s*(\w+)', line, re.IGNORECASE)
-            if m:
-                return "SHOW_SINGLE" if m.group(1).lower() == "single" else "SHOW_LOOP"
-    return "SHOW_LOOP"
-
-
 def filename_to_symbol(stem: str) -> str:
     """Convert a filename stem to an uppercase C array symbol. e.g. 'example_fade' → 'SHOW_EXAMPLE_FADE'"""
     clean = re.sub(r'[^a-zA-Z0-9]', '_', stem)
@@ -56,14 +46,21 @@ def hex_to_rgb(hex_str: str) -> tuple[int, int, int]:
     return int(hex_str[0:2], 16), int(hex_str[2:4], 16), int(hex_str[4:6], 16)
 
 
-def parse_show(filepath: Path) -> list[tuple[int, int, int, int]]:
+def parse_show_file(filepath: Path) -> tuple[list[tuple[int, int, int, int]], str]:
     """
-    Parse a .txt show file. Returns list of (r, g, b, duration_ms) tuples.
-    Raises ValueError on malformed lines.
+    Parse a .txt show file in one pass. Returns (steps, mode_constant).
+    steps: list of (r, g, b, duration_ms) tuples
+    mode_constant: 'SHOW_LOOP' or 'SHOW_SINGLE' (default SHOW_LOOP if not set)
+    Raises ValueError on malformed lines or empty files.
     """
     steps = []
+    mode  = "SHOW_LOOP"
     with open(filepath) as f:
         for lineno, raw_line in enumerate(f, 1):
+            m = re.match(r'^\s*//\s*mode:\s*(\w+)', raw_line, re.IGNORECASE)
+            if m:
+                mode = "SHOW_SINGLE" if m.group(1).lower() == "single" else "SHOW_LOOP"
+                continue
             line = raw_line.split("//")[0].strip()
             if not line:
                 continue
@@ -78,7 +75,7 @@ def parse_show(filepath: Path) -> list[tuple[int, int, int, int]]:
             steps.append((r, g, b, duration))
     if not steps:
         raise ValueError(f"{filepath.name}: file contains no steps.")
-    return steps
+    return steps, mode
 
 
 def render_show_header(steps: list, source_name: str, symbol: str) -> str:
@@ -166,9 +163,8 @@ def main() -> None:
     for txt_path in ordered_files:
         stem   = txt_path.stem
         symbol = filename_to_symbol(stem)
-        mode   = parse_mode(txt_path)
         try:
-            steps  = parse_show(txt_path)
+            steps, mode = parse_show_file(txt_path)
             header = render_show_header(steps, txt_path.name, symbol)
             out    = SKETCH_DIR / f"show_{stem}.h"
             out.write_text(header, encoding="utf-8")