Checkpoint web parity through Chromium input tasks

tools/web/generate-glb-desktop-import-report.mjs

@@ -0,0 +1,95 @@
+import assert from "node:assert/strict";
+import crypto from "node:crypto";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { pathToFileURL, fileURLToPath } from "node:url";
+import ts from "../../web/node_modules/typescript/lib/typescript.js";
+
+const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
+const outputPath = path.resolve(process.argv[2] ?? path.join(root, "tests/golden/M12-06B/web-import-report.json"));
+const parentManifestPath = path.join(root, "tests/golden/M12-06A/manifest.json");
+const fixtureReportPath = path.join(root, "tests/golden/M12-06A/desktop-fixtures.json");
+const fixtureRoot = path.join(root, "tests/files/web/m12_glb_desktop_v1");
+const temporary = fs.mkdtempSync(path.join(os.tmpdir(), "m12-06b-import-report-"));
+const sha256 = (bytes) => crypto.createHash("sha256").update(bytes).digest("hex");
+const stableValue = (value) => Array.isArray(value)
+  ? value.map(stableValue)
+  : value && typeof value === "object"
+    ? Object.fromEntries(Object.keys(value).sort().map((key) => [key, stableValue(value[key])]))
+    : value;
+const stableSha256 = (value) => sha256(JSON.stringify(stableValue(value)));
+const arrayBuffer = (bytes) => bytes.buffer.slice(bytes.byteOffset, bytes.byteOffset + bytes.byteLength);
+
+try {
+  const sourcePath = path.join(root, "web/protocol/glb-import.ts");
+  const transpiled = ts.transpileModule(fs.readFileSync(sourcePath, "utf8"), {
+    compilerOptions: { module: ts.ModuleKind.ES2022, target: ts.ScriptTarget.ES2022 },
+    fileName: sourcePath,
+    reportDiagnostics: true,
+  });
+  assert.deepEqual(transpiled.diagnostics, []);
+  const modulePath = path.join(temporary, "glb-import.mjs");
+  fs.writeFileSync(modulePath, transpiled.outputText);
+  const protocol = await import(pathToFileURL(modulePath));
+  const fixtures = JSON.parse(fs.readFileSync(fixtureReportPath, "utf8")).fixtures;
+  const comparisons = fixtures.map((fixture) => {
+    const bytes = fs.readFileSync(path.join(fixtureRoot, fixture.file));
+    assert.equal(sha256(bytes), fixture.sha256, `${fixture.id} source SHA-256`);
+    const imported = protocol.importGLBDesktopFixtureSemantics(arrayBuffer(bytes));
+    const comparison = protocol.compareGLBDesktopFixtureSemantics(fixture.semantic, imported);
+    const primitives = imported.meshes.flatMap((mesh) => mesh.primitives);
+    return {
+      id: fixture.id,
+      file: fixture.file,
+      sourceSha256: fixture.sha256,
+      byteLength: bytes.byteLength,
+      desktopSemanticSha256: stableSha256(fixture.semantic),
+      webSemanticSha256: stableSha256(imported),
+      compatible: comparison.compatible,
+      mismatchCount: comparison.mismatches.length,
+      topology: {
+        meshCount: imported.meshes.length,
+        primitiveCount: primitives.length,
+        indexCount: primitives.reduce((sum, primitive) => sum + (primitive.indices?.count ?? 0), 0),
+        modes: [...new Set(primitives.map((primitive) => primitive.mode))].sort((left, right) => left - right),
+      },
+      attributes: [...new Set(primitives.flatMap((primitive) => Object.keys(primitive.attributes)))].sort(),
+      materials: {
+        count: imported.materials.length,
+        pbrCount: imported.materials.filter((material) => material.pbr.metallicFactor !== null && material.pbr.roughnessFactor !== null).length,
+        texturedCount: imported.materials.filter((material) => material.pbr.baseColorTexture !== null).length,
+      },
+      nodes: {
+        count: imported.nodes.length,
+        namedCount: imported.nodes.filter((node) => node.name !== null).length,
+        hierarchyEdges: imported.nodes.reduce((sum, node) => sum + node.children.length, 0),
+        skinnedCount: imported.nodes.filter((node) => node.skin !== null).length,
+      },
+      animations: {
+        count: imported.animations.length,
+        channelPaths: imported.animations.flatMap((animation) => animation.channels.map((channel) => channel.target.path)).sort(),
+        sampleCounts: imported.animations.flatMap((animation) => animation.samplers.map((sampler) => sampler.input?.count ?? 0)),
+      },
+    };
+  });
+  const report = {
+    schemaVersion: 1,
+    task: "M12-06B",
+    operation: "WEB_GLB_IMPORT_SEMANTIC_COMPARISON",
+    parentManifestSha256: sha256(fs.readFileSync(parentManifestPath)),
+    fixtureReportSha256: sha256(fs.readFileSync(fixtureReportPath)),
+    fixtureCount: comparisons.length,
+    comparedDomains: ["topology", "attributes", "materials", "nodes", "animations"],
+    allCompatible: comparisons.every((comparison) => comparison.compatible && comparison.mismatchCount === 0),
+    comparisons,
+    routeState: "BLOCKED_UNTIL_MAIN_PERSISTENCE",
+    nextTask: "M12-06C",
+  };
+  fs.mkdirSync(path.dirname(outputPath), { recursive: true });
+  fs.writeFileSync(outputPath, JSON.stringify(report, null, 2) + "\n");
+  process.stdout.write(`glb-desktop-import-report-generated fixtures=${report.fixtureCount} domains=${report.comparedDomains.length} compatible=${report.allCompatible} next=${report.nextTask}\n`);
+}
+finally {
+  fs.rmSync(temporary, { recursive: true, force: true });
+}