Initial commit

skills/web-shader-extractor/scripts/scan-bundle.sh

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+#!/bin/bash
+# Scan JS bundle(s) for WebGL/shader keywords and report tech stack
+# Usage: scan-bundle.sh <file1.js> [file2.js ...]
+# Output: keyword counts + tech stack guess
+
+set -eu
+
+if [ $# -eq 0 ]; then
+    echo "Usage: scan-bundle.sh <file1.js> [file2.js ...]"
+    echo "Scans JS files for WebGL/shader keywords and identifies tech stack."
+    exit 1
+fi
+
+FILES=("$@")
+
+echo "=== SHADER/WEBGL KEYWORD SCAN ==="
+echo ""
+
+# Core GLSL keywords
+echo "--- GLSL Keywords ---"
+for kw in "gl_FragColor" "gl_Position" "gl_PointSize" "gl_PointCoord" \
+          "precision" "uniform" "varying" "attribute" \
+          "FRAGMENT_SHADER" "VERTEX_SHADER" "createShader" \
+          "sampler2D" "texture2D" "smoothstep" "discard"; do
+    count=$(grep -o "$kw" "${FILES[@]}" 2>/dev/null | wc -l | tr -d ' ')
+    [ "$count" -gt 0 ] && printf "  %-25s %s\n" "$kw" "$count" || true
+done
+
+echo ""
+echo "--- WebGL/Canvas Keywords ---"
+for kw in "canvas" "webgl" "webgl2" "getContext" "shader" "glsl" \
+          "framebuffer" "renderbuffer" "drawArrays" "drawElements" \
+          "bufferData" "texImage2D" "POINTS"; do
+    count=$(grep -oi "$kw" "${FILES[@]}" 2>/dev/null | wc -l | tr -d ' ')
+    [ "$count" -gt 0 ] && printf "  %-25s %s\n" "$kw" "$count" || true
+done
+
+echo ""
+echo "--- Noise/Math Keywords ---"
+for kw in "snoise" "simplex" "perlin" "noise" "PoissonDisk" "Poisson"; do
+    count=$(grep -o "$kw" "${FILES[@]}" 2>/dev/null | wc -l | tr -d ' ')
+    [ "$count" -gt 0 ] && printf "  %-25s %s\n" "$kw" "$count" || true
+done
+
+echo ""
+echo "=== TECH STACK DETECTION ==="
+
+detect() {
+    local label="$1" pattern="$2"
+    local count
+    count=$(grep -oE "$pattern" "${FILES[@]}" 2>/dev/null | wc -l | tr -d ' ')
+    [ "$count" -gt 0 ] && printf "  %-25s %s hits\n" "$label" "$count" || true
+}
+
+# Frameworks (patterns specific enough to avoid false positives)
+detect "Three.js"              "THREE\.|WebGLRenderer|ShaderMaterial|BufferGeometry|PerspectiveCamera|OrthographicCamera"
+detect "Three.js (minified)"   "setRenderTarget|DataTexture|setPixelRatio|setClearColor"
+detect "PixiJS"                "PIXI\.|pixi\.js|PixiJS"
+detect "Babylon.js"            "BABYLON\.|babylonjs"
+detect "Raw WebGL"             "gl\.bindBuffer|gl\.bindTexture|gl\.useProgram|gl\.attachShader|gl\.linkProgram"
+detect "Regl"                  "regl\(|regl\.frame|regl\.texture"
+detect "OGL"                   "ogl\.|ogl/"
+
+# Patterns
+detect "GPGPU"                 "setRenderTarget|RenderTarget|ping.pong|gpgpu|GPGPU"
+detect "Particles"             "gl_PointSize|gl_PointCoord|PointSize|particl"
+detect "Post-processing"       "EffectComposer|RenderPass|ShaderPass|postprocess"
+detect "Ray marching"          "rayMarch|sdSphere|sdBox|sdRoundBox"
+detect "Instancing"            "InstancedMesh|InstancedBufferGeometry|instanceMatrix"
+
+echo ""
+echo "=== FILE SIZES ==="
+for f in "${FILES[@]}"; do
+    size=$(wc -c < "$f" | tr -d ' ')
+    echo "  $(basename "$f"): ${size} bytes"
+done