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([])
+  })
+})

tests/sync-gemini.test.ts

@@ -0,0 +1,106 @@
+import { describe, expect, test } from "bun:test"
+import { promises as fs } from "fs"
+import path from "path"
+import os from "os"
+import { syncToGemini } from "../src/sync/gemini"
+import type { ClaudeHomeConfig } from "../src/parsers/claude-home"
+
+describe("syncToGemini", () => {
+  test("symlinks skills and writes settings.json", async () => {
+    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "sync-gemini-"))
+    const fixtureSkillDir = path.join(import.meta.dir, "fixtures", "sample-plugin", "skills", "skill-one")
+
+    const config: ClaudeHomeConfig = {
+      skills: [
+        {
+          name: "skill-one",
+          sourceDir: fixtureSkillDir,
+          skillPath: path.join(fixtureSkillDir, "SKILL.md"),
+        },
+      ],
+      mcpServers: {
+        context7: { url: "https://mcp.context7.com/mcp" },
+        local: { command: "echo", args: ["hello"], env: { FOO: "bar" } },
+      },
+    }
+
+    await syncToGemini(config, tempRoot)
+
+    // Check skill symlink
+    const linkedSkillPath = path.join(tempRoot, "skills", "skill-one")
+    const linkedStat = await fs.lstat(linkedSkillPath)
+    expect(linkedStat.isSymbolicLink()).toBe(true)
+
+    // Check settings.json
+    const settingsPath = path.join(tempRoot, "settings.json")
+    const settings = JSON.parse(await fs.readFile(settingsPath, "utf8")) as {
+      mcpServers: Record<string, { url?: string; command?: string; args?: string[]; env?: Record<string, string> }>
+    }
+
+    expect(settings.mcpServers.context7?.url).toBe("https://mcp.context7.com/mcp")
+    expect(settings.mcpServers.local?.command).toBe("echo")
+    expect(settings.mcpServers.local?.args).toEqual(["hello"])
+    expect(settings.mcpServers.local?.env).toEqual({ FOO: "bar" })
+  })
+
+  test("merges existing settings.json", async () => {
+    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "sync-gemini-merge-"))
+    const settingsPath = path.join(tempRoot, "settings.json")
+
+    await fs.writeFile(
+      settingsPath,
+      JSON.stringify({
+        theme: "dark",
+        mcpServers: { existing: { command: "node", args: ["server.js"] } },
+      }, null, 2),
+    )
+
+    const config: ClaudeHomeConfig = {
+      skills: [],
+      mcpServers: {
+        context7: { url: "https://mcp.context7.com/mcp" },
+      },
+    }
+
+    await syncToGemini(config, tempRoot)
+
+    const merged = JSON.parse(await fs.readFile(settingsPath, "utf8")) as {
+      theme: string
+      mcpServers: Record<string, { command?: string; url?: string }>
+    }
+
+    // Preserves existing settings
+    expect(merged.theme).toBe("dark")
+    // Preserves existing MCP servers
+    expect(merged.mcpServers.existing?.command).toBe("node")
+    // Adds new MCP servers
+    expect(merged.mcpServers.context7?.url).toBe("https://mcp.context7.com/mcp")
+  })
+
+  test("does not write settings.json when no MCP servers", async () => {
+    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "sync-gemini-nomcp-"))
+    const fixtureSkillDir = path.join(import.meta.dir, "fixtures", "sample-plugin", "skills", "skill-one")
+
+    const config: ClaudeHomeConfig = {
+      skills: [
+        {
+          name: "skill-one",
+          sourceDir: fixtureSkillDir,
+          skillPath: path.join(fixtureSkillDir, "SKILL.md"),
+        },
+      ],
+      mcpServers: {},
+    }
+
+    await syncToGemini(config, tempRoot)
+
+    // Skills should still be symlinked
+    const linkedSkillPath = path.join(tempRoot, "skills", "skill-one")
+    const linkedStat = await fs.lstat(linkedSkillPath)
+    expect(linkedStat.isSymbolicLink()).toBe(true)
+
+    // But settings.json should not exist
+    const settingsExists = await fs.access(path.join(tempRoot, "settings.json")).then(() => true).catch(() => false)
+    expect(settingsExists).toBe(false)
+  })
+})