feat: add detect-tools utility and Gemini sync with tests

tests/detect-tools.test.ts

@@ -0,0 +1,96 @@
+import { describe, expect, test } from "bun:test"
+import { promises as fs } from "fs"
+import path from "path"
+import os from "os"
+import { detectInstalledTools, getDetectedTargetNames } from "../src/utils/detect-tools"
+
+describe("detectInstalledTools", () => {
+  test("detects tools when config directories exist", async () => {
+    const tempHome = await fs.mkdtemp(path.join(os.tmpdir(), "detect-tools-"))
+    const tempCwd = await fs.mkdtemp(path.join(os.tmpdir(), "detect-tools-cwd-"))
+
+    // Create directories for some tools
+    await fs.mkdir(path.join(tempHome, ".codex"), { recursive: true })
+    await fs.mkdir(path.join(tempCwd, ".cursor"), { recursive: true })
+    await fs.mkdir(path.join(tempCwd, ".gemini"), { recursive: true })
+
+    const results = await detectInstalledTools(tempHome, tempCwd)
+
+    const codex = results.find((t) => t.name === "codex")
+    expect(codex?.detected).toBe(true)
+    expect(codex?.reason).toContain(".codex")
+
+    const cursor = results.find((t) => t.name === "cursor")
+    expect(cursor?.detected).toBe(true)
+    expect(cursor?.reason).toContain(".cursor")
+
+    const gemini = results.find((t) => t.name === "gemini")
+    expect(gemini?.detected).toBe(true)
+    expect(gemini?.reason).toContain(".gemini")
+
+    // Tools without directories should not be detected
+    const opencode = results.find((t) => t.name === "opencode")
+    expect(opencode?.detected).toBe(false)
+
+    const droid = results.find((t) => t.name === "droid")
+    expect(droid?.detected).toBe(false)
+
+    const pi = results.find((t) => t.name === "pi")
+    expect(pi?.detected).toBe(false)
+  })
+
+  test("returns all tools with detected=false when no directories exist", async () => {
+    const tempHome = await fs.mkdtemp(path.join(os.tmpdir(), "detect-empty-"))
+    const tempCwd = await fs.mkdtemp(path.join(os.tmpdir(), "detect-empty-cwd-"))
+
+    const results = await detectInstalledTools(tempHome, tempCwd)
+
+    expect(results.length).toBe(6)
+    for (const tool of results) {
+      expect(tool.detected).toBe(false)
+      expect(tool.reason).toBe("not found")
+    }
+  })
+
+  test("detects home-based tools", async () => {
+    const tempHome = await fs.mkdtemp(path.join(os.tmpdir(), "detect-home-"))
+    const tempCwd = await fs.mkdtemp(path.join(os.tmpdir(), "detect-home-cwd-"))
+
+    await fs.mkdir(path.join(tempHome, ".config", "opencode"), { recursive: true })
+    await fs.mkdir(path.join(tempHome, ".factory"), { recursive: true })
+    await fs.mkdir(path.join(tempHome, ".pi"), { recursive: true })
+
+    const results = await detectInstalledTools(tempHome, tempCwd)
+
+    expect(results.find((t) => t.name === "opencode")?.detected).toBe(true)
+    expect(results.find((t) => t.name === "droid")?.detected).toBe(true)
+    expect(results.find((t) => t.name === "pi")?.detected).toBe(true)
+  })
+})
+
+describe("getDetectedTargetNames", () => {
+  test("returns only names of detected tools", async () => {
+    const tempHome = await fs.mkdtemp(path.join(os.tmpdir(), "detect-names-"))
+    const tempCwd = await fs.mkdtemp(path.join(os.tmpdir(), "detect-names-cwd-"))
+
+    await fs.mkdir(path.join(tempHome, ".codex"), { recursive: true })
+    await fs.mkdir(path.join(tempCwd, ".gemini"), { recursive: true })
+
+    const names = await getDetectedTargetNames(tempHome, tempCwd)
+
+    expect(names).toContain("codex")
+    expect(names).toContain("gemini")
+    expect(names).not.toContain("opencode")
+    expect(names).not.toContain("droid")
+    expect(names).not.toContain("pi")
+    expect(names).not.toContain("cursor")
+  })
+
+  test("returns empty array when nothing detected", async () => {
+    const tempHome = await fs.mkdtemp(path.join(os.tmpdir(), "detect-none-"))
+    const tempCwd = await fs.mkdtemp(path.join(os.tmpdir(), "detect-none-cwd-"))
+
+    const names = await getDetectedTargetNames(tempHome, tempCwd)
+    expect(names).toEqual([])
+  })
+})