ren 0.1.0

A static analysis tool that measures the performance weight of each feature in your Flutter app — detecting costly AST patterns and reporting a gravity score per feature.

0.1.0

Added

• Compound rule detection — 20+ widget combinations with elevated weights:
  • Level 3 (critical × 2.5) — BackdropFilter/ShaderMask/ImageFiltered/ColorFiltered inside ListView/GridView, Opacity/ClipPath/ClipRRect inside AnimatedBuilder, Opacity inside ListView/GridView.
  • Level 2 (high × 1.5) — BackdropFilter inside Stack/PageView, NetworkImage inside ListView/GridView, CustomPaint/ClipPath inside AnimatedBuilder/ListView/GridView, Hero inside ListView/GridView, ShaderMask inside AnimatedBuilder.
• Top contributors breakdown per feature — shows which patterns contribute most to the gravity score.
• [inside ParentWidget] context tag on compound patterns.
• renw executable — fallback for Windows PowerShell where ren conflicts with Rename-Item.
• New patterns — ClipRRect, Hero.
• lambda-depth tracking to avoid false positives on setState inside callbacks.

Fixed

• setState false positives on callbacks with target (e.g. state.setState, logic.setState).
• GridView.count and other non-lazy named constructors now correctly flagged.
• Image.network detection via full name matching in visitMethodInvocation.

0.0.1

• Feature detection by folder convention (lib/features/, lib/modules/).
• --features flag for custom feature roots (e.g. lib/ui/screens).
• --exclude flag — comma-separated list of paths to exclude from analysis (e.g. lib/generated,lib/_tools).
• Simplified CLI — ren runs analysis directly without subcommand.
• AST-based pattern detection across six categories:
  • GPU-costly widgets — BackdropFilter, ShaderMask, Opacity, ColorFiltered, ImageFiltered, saveLayer, ClipPath, CustomPaint.
  • Unoptimized lists — ListView, GridView, SingleChildScrollView, Wrap.
  • Uncached images — Image.network, NetworkImage, FadeInImage.
  • Rebuild patterns — RepaintBoundary, MediaQuery.of.
  • Memory leaks — Timer, Timer.periodic, StreamController, StreamSubscription.
  • Lifecycle misuse — setState in build, setState in initState, setState in dispose.
• Gravity score (0–100) per feature mapped to LOW / MEDIUM / HIGH / CRITICAL.
• ANSI console output with gravity bar and per-pattern hints.
• JSON output (--format json) for CI/CD pipelines.
• --fail-on flag — exits with code 1 if any feature reaches the specified level.