chore: Replace console.warn with @tauri-apps/plugin-log

Replaces the raw `console.warn` in the evaluation engine (`src/engine/index.ts`) with the Tauri logging plugin (`warn` from `@tauri-apps/plugin-log`) for better production observability. Ensures tests mock this API.

Added necessary backend initialization in `src-tauri`.

Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com>

package-lock.json

@@ -19,6 +19,7 @@
         "@tauri-apps/plugin-autostart": "^2.3.0",
         "@tauri-apps/plugin-dialog": "^2.7.1",
         "@tauri-apps/plugin-global-shortcut": "^2.2.0",
+        "@tauri-apps/plugin-log": "^2.9.0",
         "@tauri-apps/plugin-opener": "^2.2.0",
         "@tauri-apps/plugin-process": "^2.3.1",
         "@tauri-apps/plugin-updater": "^2.10.1",
@@ -1244,6 +1245,15 @@
         "@tauri-apps/api": "^2.11.0"
       }
     },
+    "node_modules/@tauri-apps/plugin-log": {
+      "version": "2.9.0",
+      "resolved": "https://registry.npmjs.org/@tauri-apps/plugin-log/-/plugin-log-2.9.0.tgz",
+      "integrity": "sha512-Ql8okrnsguk0eDq1GvRfttFV5KaeW/7vcao6bdbkXCRJ1+2sWE15ZJvJVEKVANrOKy1mRngqC3IFIAP+wP5qSw==",
+      "license": "MIT OR Apache-2.0",
+      "dependencies": {
+        "@tauri-apps/api": "^2.11.0"
+      }
+    },
     "node_modules/@tauri-apps/plugin-opener": {
       "version": "2.5.4",
       "resolved": "https://registry.npmjs.org/@tauri-apps/plugin-opener/-/plugin-opener-2.5.4.tgz",

package.json

@@ -25,6 +25,7 @@
     "@tauri-apps/plugin-autostart": "^2.3.0",
     "@tauri-apps/plugin-dialog": "^2.7.1",
     "@tauri-apps/plugin-global-shortcut": "^2.2.0",
+    "@tauri-apps/plugin-log": "^2.9.0",
     "@tauri-apps/plugin-opener": "^2.2.0",
     "@tauri-apps/plugin-process": "^2.3.1",
     "@tauri-apps/plugin-updater": "^2.10.1",

src-tauri/Cargo.lock

@@ -32,6 +32,23 @@ dependencies = [
  "alloc-no-stdlib",
 ]
 
+[[package]]
+name = "android_log-sys"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "84521a3cf562bc62942e294181d9eef17eb38ceb8c68677bc49f144e4c3d4f8d"
+
+[[package]]
+name = "android_logger"
+version = "0.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbb4e440d04be07da1f1bf44fb4495ebd58669372fe0cffa6e48595ac5bd88a3"
+dependencies = [
+ "android_log-sys",
+ "env_filter",
+ "log",
+]
+
 [[package]]
 name = "android_system_properties"
 version = "0.1.5"
@@ -941,6 +958,16 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "env_filter"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bf3c259d255ca70051b30e2e95b5446cdb8949ac4cd22c0d7fd634d89f568e2"
+dependencies = [
+ "log",
+ "regex",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.2"
@@ -1004,6 +1031,15 @@ dependencies = [
  "simd-adler32",
 ]
 
+[[package]]
+name = "fern"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4316185f709b23713e41e3195f90edef7fb00c3ed4adc79769cf09cc762a3b29"
+dependencies = [
+ "log",
+]
+
 [[package]]
 name = "field-offset"
 version = "0.3.6"
@@ -2270,6 +2306,15 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "num_threads"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c7398b9c8b70908f6371f47ed36737907c87c52af34c268fed0bf0ceb92ead9"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "objc2"
 version = "0.6.4"
@@ -3736,6 +3781,7 @@ dependencies = [
  "tauri-plugin-autostart",
  "tauri-plugin-dialog",
  "tauri-plugin-global-shortcut",
+ "tauri-plugin-log",
  "tauri-plugin-opener",
  "tauri-plugin-process",
  "tauri-plugin-single-instance",
@@ -4075,6 +4121,27 @@ dependencies = [
  "thiserror 2.0.18",
 ]
 
+[[package]]
+name = "tauri-plugin-log"
+version = "2.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6792296e6f389268016c77db21ebae1fc0568f2fccf88b1ec7e2ea71330afb4c"
+dependencies = [
+ "android_logger",
+ "fern",
+ "log",
+ "objc2",
+ "objc2-foundation",
+ "serde",
+ "serde_json",
+ "serde_repr",
+ "swift-rs",
+ "tauri",
+ "tauri-plugin",
+ "thiserror 2.0.18",
+ "time",
+]
+
 [[package]]
 name = "tauri-plugin-opener"
 version = "2.5.4"
@@ -4326,7 +4393,9 @@ checksum = "743bd48c283afc0388f9b8827b976905fb217ad9e647fae3a379a9283c4def2c"
 dependencies = [
  "deranged",
  "itoa",
+ "libc",
  "num-conv",
+ "num_threads",
  "powerfmt",
  "serde_core",
  "time-core",

src-tauri/Cargo.toml

@@ -21,6 +21,7 @@ serde_json = "1"
 reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
 chrono = "0.4"
 futures = "0.3.32"
+tauri-plugin-log = "2.9.0"
 
 [profile.release]
 strip = true

src-tauri/src/main.rs

@@ -985,6 +985,7 @@ fn main() {
         .plugin(tauri_plugin_dialog::init())
         .plugin(tauri_plugin_updater::Builder::new().build())
         .plugin(tauri_plugin_process::init())
+        .plugin(tauri_plugin_log::Builder::new().build())
         .manage(DroppedFiles::default())
         .manage(DataDirGate::default())
         .invoke_handler(tauri::generate_handler![

src/engine/edge.test.ts

@@ -1,6 +1,12 @@
-import { describe, it, expect, beforeAll } from "vitest";
+import { describe, it, expect, beforeAll, vi } from "vitest";
 import { SumEngine } from "./index";
 
+vi.mock("@tauri-apps/plugin-log", () => ({
+  warn: vi.fn().mockResolvedValue(undefined),
+  error: vi.fn().mockResolvedValue(undefined),
+  info: vi.fn().mockResolvedValue(undefined),
+}));
+
 let eng: SumEngine;
 
 beforeAll(() => {

src/engine/engine.test.ts

@@ -1,5 +1,11 @@
-import { describe, it, expect, beforeAll } from "vitest";
+import { describe, it, expect, beforeAll, vi } from "vitest";
 import { SumEngine } from "./index";
+
+vi.mock("@tauri-apps/plugin-log", () => ({
+  warn: vi.fn().mockResolvedValue(undefined),
+  error: vi.fn().mockResolvedValue(undefined),
+  info: vi.fn().mockResolvedValue(undefined),
+}));
 import { qty, EvalError, XRefError } from "./types";
 import type { XRefResolution, EvalCtx } from "./evaluator";
 import { evaluate } from "./evaluator";
@@ -230,7 +236,13 @@ describe("variables and document context", () => {
   });
   it("sum / total", () => {
     expect(calcDoc("10\n20\n30\nsum")).toEqual(["10", "20", "30", "60"]);
-    expect(calcDoc("10\n20\n\n30\nsum")).toEqual(["10", "20", null, "30", "30"]);
+    expect(calcDoc("10\n20\n\n30\nsum")).toEqual([
+      "10",
+      "20",
+      null,
+      "30",
+      "30",
+    ]);
   });
   it("sum with units", () => {
     expect(calcDoc("$10\n$20\ntotal")).toEqual(["$10", "$20", "$30"]);
@@ -243,15 +255,31 @@ describe("variables and document context", () => {
   });
   it("count", () => {
     expect(calcDoc("10\n20\n30\ncount")).toEqual(["10", "20", "30", "3"]);
-    expect(calcDoc("10\n20\n\n30\ncount")).toEqual(["10", "20", null, "30", "1"]);
+    expect(calcDoc("10\n20\n\n30\ncount")).toEqual([
+      "10",
+      "20",
+      null,
+      "30",
+      "1",
+    ]);
   });
   it("min / max", () => {
     expect(calcDoc("10\n20\n5\nmin")).toEqual(["10", "20", "5", "5"]);
     expect(calcDoc("10\n20\n5\nmax")).toEqual(["10", "20", "5", "20"]);
   });
   it("min / max with units", () => {
-    expect(calcDoc("10 m\n5 m\n20 m\nmin")).toEqual(["10 m", "5 m", "20 m", "5 m"]);
+    expect(calcDoc("10 m\n5 m\n20 m\nmin")).toEqual([
-    expect(calcDoc("10 m\n5 m\n20 m\nmax")).toEqual(["10 m", "5 m", "20 m", "20 m"]);
+      "10 m",
+      "5 m",
+      "20 m",
+      "5 m",
+    ]);
+    expect(calcDoc("10 m\n5 m\n20 m\nmax")).toEqual([
+      "10 m",
+      "5 m",
+      "20 m",
+      "20 m",
+    ]);
   });
   it("product", () => {
     expect(calcDoc("2\n3\n4\nproduct")).toEqual(["2", "3", "4", "24"]);
@@ -332,18 +360,32 @@ describe("goal seek", () => {
 
 describe("extension API", () => {
   it("addUnit (horse from Sample.js)", () => {
-    eng.addUnit({ id: "horse", phrases: "horse, horses, hrs", baseUnitId: "meter", format: "hrs", ratio: 2.4 });
+    eng.addUnit({
+      id: "horse",
+      phrases: "horse, horses, hrs",
+      baseUnitId: "meter",
+      format: "hrs",
+      ratio: 2.4,
+    });
     expect(calc("2 horses in meters")).toBe("4.8 m");
   });
   it("addUnit throws on id collision instead of silently corrupting unitsById", () => {
     expect(() =>
-      eng.addUnit({ id: "horse", phrases: "nag", baseUnitId: "meter", format: "nag", ratio: 99 })
+      eng.addUnit({
+        id: "horse",
+        phrases: "nag",
+        baseUnitId: "meter",
+        format: "nag",
+        ratio: 99,
+      }),
     ).toThrow(/horse/);
     // the original registration must survive the failed collision
     expect(calc("2 horses in meters")).toBe("4.8 m");
   });
   it("addFunction (zum from Sample.js)", () => {
-    eng.addFunction({ id: "zum", phrases: "zum" }, (values) => ({ double: values[0].double + values[1].double }));
+    eng.addFunction({ id: "zum", phrases: "zum" }, (values) => ({
+      double: values[0].double + values[1].double,
+    }));
     expect(calc("zum(2;3)")).toBe("5");
   });
   it("setVariable", () => {
@@ -374,7 +416,8 @@ describe("cross-sheet references", () => {
     const s = sheet.toLowerCase();
     if (s === "budget") {
       if (key === "total") return { ok: true, value: qty(150) };
-      if (key === "rent") return { ok: true, value: qty(500, eng.reg.unitsById.get("meter")!) };
+      if (key === "rent")
+        return { ok: true, value: qty(500, eng.reg.unitsById.get("meter")!) };
       if (key === "last") return { ok: true, value: qty(7) };
       return { ok: false, reason: `no variable "${key}" in "${sheet}"` };
     }
@@ -415,7 +458,10 @@ describe("cross-sheet references", () => {
     expect(r[0].error).toBeUndefined();
   });
   it("propagates a resolver-reported circular reference", () => {
-    const cyc = (): XRefResolution => ({ ok: false, reason: "circular reference" });
+    const cyc = (): XRefResolution => ({
+      ok: false,
+      reason: "circular reference",
+    });
     const r = eng.evaluateDocument("@A.total", cyc);
     expect(r[0].value).toBeNull();
     expect(r[0].error).toBe("circular reference");
@@ -439,7 +485,9 @@ describe("evaluation errors", () => {
       reg: eng.reg,
       historicalRates: {},
     } as unknown as EvalCtx;
-    expect(() => evaluate({ k: "var", name: "unknown" }, ctx)).toThrowError(EvalError);
+    expect(() => evaluate({ k: "var", name: "unknown" }, ctx)).toThrowError(
+      EvalError,
+    );
   });
 
   it("throws XRefError for unresolved xref", () => {
@@ -449,6 +497,8 @@ describe("evaluation errors", () => {
       historicalRates: {},
       resolveXRef: () => ({ ok: false, reason: "xref error" }),
     } as unknown as EvalCtx;
-    expect(() => evaluate({ k: "xref", sheet: "Sheet", key: "key" }, ctx)).toThrowError(XRefError);
+    expect(() =>
+      evaluate({ k: "xref", sheet: "Sheet", key: "key" }, ctx),
+    ).toThrowError(XRefError);
   });
 });

src/engine/index.ts

@@ -1,6 +1,18 @@
 // Public facade: evaluates whole documents line by line and exposes the
 // extension API (numi.addUnit / addFunction / setVariable).
-import { DateOrder, Decimal, EngineSettings, EvalError, Quantity, Unit, Value, XRefError, defaultSettings, qty } from "./types";
+import { warn } from "@tauri-apps/plugin-log";
+import {
+  DateOrder,
+  Decimal,
+  EngineSettings,
+  EvalError,
+  Quantity,
+  Unit,
+  Value,
+  XRefError,
+  defaultSettings,
+  qty,
+} from "./types";
 import { Registry, buildRegistry, Completion } from "./registry";
 import { tokenize, Token } from "./tokenizer";
 import { parseLine, ParsedLine } from "./parser";
@@ -84,7 +96,8 @@ export class SumEngine {
 
   updateSettings(patch: Partial<EngineSettings>): void {
     this.settings = { ...this.settings, ...patch };
-    if (patch.dateFormat) this.dateOrder = resolveDateOrder(this.settings.dateFormat);
+    if (patch.dateFormat)
+      this.dateOrder = resolveDateOrder(this.settings.dateFormat);
   }
 
   completions(): Completion[] {
@@ -106,13 +119,25 @@ export class SumEngine {
 
       if (trimmed.length === 0) {
         const kind = commentStart >= 0 ? "comment" : "empty";
-        results.push({ text: null, value: null, kind, tokens: [], commentStart: commentStart >= 0 ? commentStart : null });
+        results.push({
+          text: null,
+          value: null,
+          kind,
+          tokens: [],
+          commentStart: commentStart >= 0 ? commentStart : null,
+        });
         lineValues.push(null);
         lineKinds.push("empty");
         continue;
       }
       if (trimmed.startsWith("#")) {
-        results.push({ text: null, value: null, kind: "header", tokens: [], commentStart: commentStart >= 0 ? commentStart : null });
+        results.push({
+          text: null,
+          value: null,
+          kind: "header",
+          tokens: [],
+          commentStart: commentStart >= 0 ? commentStart : null,
+        });
         lineValues.push(null);
         lineKinds.push("header");
         continue;
@@ -148,7 +173,9 @@ export class SumEngine {
         } else {
           // Surface unexpected bugs/BigInt errors/RangeErrors and log them
           lineError = e instanceof Error ? e.message : String(e);
-          console.warn("evaluate failed:", e);
+          warn(
+            `evaluate failed: ${e instanceof Error ? e.stack || e.message : String(e)}`,
+          ).catch((err) => console.warn("logger failed", err));
         }
         value = null;
       }
@@ -158,7 +185,10 @@ export class SumEngine {
       lineValues.push(value);
       lineKinds.push("normal");
       results.push({
-        text: (value && value.kind !== "chart") ? formatValue(value, this.settings) : null,
+        text:
+          value && value.kind !== "chart"
+            ? formatValue(value, this.settings)
+            : null,
         value,
         kind: "normal",
         tokens,
@@ -216,9 +246,13 @@ export class SumEngine {
   }
 
   addUnit(spec: ExtensionUnitSpec): void {
-    const base = this.reg.unitsById.get(spec.baseUnitId) ?? this.currencyBase(spec.baseUnitId);
+    const base =
-    if (!base) throw new Error(`numi.addUnit: unknown baseUnitId ${spec.baseUnitId}`);
+      this.reg.unitsById.get(spec.baseUnitId) ??
-    if (this.reg.unitsById.has(spec.id)) throw new Error(`numi.addUnit: id "${spec.id}" is already registered`);
+      this.currencyBase(spec.baseUnitId);
+    if (!base)
+      throw new Error(`numi.addUnit: unknown baseUnitId ${spec.baseUnitId}`);
+    if (this.reg.unitsById.has(spec.id))
+      throw new Error(`numi.addUnit: id "${spec.id}" is already registered`);
     const unit: Unit = {
       id: spec.id,
       dimension: base.dimension,
@@ -229,12 +263,24 @@ export class SumEngine {
     this.reg.unitsById.set(unit.id, unit);
     for (const p of spec.phrases.split(",")) {
       const phrase = p.trim();
-      if (phrase) this.reg.addPhrase(phrase, { t: "unit", unit }, { caseSensitive: false });
+      if (phrase)
+        this.reg.addPhrase(
+          phrase,
+          { t: "unit", unit },
+          { caseSensitive: false },
+        );
     }
-    this.reg.completions.push({ label: spec.id, type: "unit", detail: "extension" });
+    this.reg.completions.push({
+      label: spec.id,
+      type: "unit",
+      detail: "extension",
+    });
   }
 
-  addFunction(spec: { id: string; phrases: string }, fn: (values: ExtensionValue[]) => ExtensionValue | number): void {
+  addFunction(
+    spec: { id: string; phrases: string },
+    fn: (values: ExtensionValue[]) => ExtensionValue | number,
+  ): void {
     const name = spec.id;
     this.reg.customFuncs.set(name, (args: Value[]) => {
       const mapped = args.map((a) => this.fromValue(a));
@@ -242,26 +288,42 @@ export class SumEngine {
     });
     for (const p of (spec.phrases || spec.id).split(",")) {
       const phrase = p.trim();
-      if (phrase) this.reg.addPhrase(phrase, { t: "func", name }, { caseSensitive: false });
+      if (phrase)
+        this.reg.addPhrase(
+          phrase,
+          { t: "func", name },
+          { caseSensitive: false },
+        );
     }
-    this.reg.completions.push({ label: name, type: "function", detail: "extension" });
+    this.reg.completions.push({
+      label: name,
+      type: "function",
+      detail: "extension",
+    });
   }
 
   private currencyBase(code: string): Unit | null {
-    return this.reg.currencyCodes.has(code) ? this.reg.makeCurrencyUnit(code) : null;
+    return this.reg.currencyCodes.has(code)
+      ? this.reg.makeCurrencyUnit(code)
+      : null;
   }
 
   private toValue(v: number | ExtensionValue): Value {
     if (typeof v === "number") return qty(v);
     const unit = v.unitId
-      ? this.reg.unitsById.get(v.unitId) ?? this.currencyBase(v.unitId) ?? null
+      ? (this.reg.unitsById.get(v.unitId) ??
+        this.currencyBase(v.unitId) ??
+        null)
       : null;
     return qty(new Decimal(v.double), unit);
   }
 
   private fromValue(v: Value): ExtensionValue {
     if (v.kind === "quantity") {
-      return { double: v.value.toNumber(), ...(v.unit ? { unitId: v.unit.id } : {}) };
+      return {
+        double: v.value.toNumber(),
+        ...(v.unit ? { unitId: v.unit.id } : {}),
+      };
     }
     if (v.kind === "percent") return { double: v.value.div(100).toNumber() };
     if (v.kind === "date") return { double: v.ms };