refactor(opencode): replace Bun shell in core flows (#16286)

packages/opencode/test/util/module.test.ts

@@ -0,0 +1,59 @@
+import { describe, expect, test } from "bun:test"
+import path from "path"
+import { Module } from "@opencode-ai/util/module"
+import { Filesystem } from "../../src/util/filesystem"
+import { tmpdir } from "../fixture/fixture"
+
+describe("util.module", () => {
+  test("resolves package subpaths from the provided dir", async () => {
+    await using tmp = await tmpdir()
+    const root = path.join(tmp.path, "proj")
+    const file = path.join(root, "node_modules/typescript/lib/tsserver.js")
+    await Filesystem.write(file, "export {}\n")
+    await Filesystem.writeJson(path.join(root, "node_modules/typescript/package.json"), { name: "typescript" })
+
+    expect(Module.resolve("typescript/lib/tsserver.js", root)).toBe(file)
+  })
+
+  test("resolves packages through ancestor node_modules", async () => {
+    await using tmp = await tmpdir()
+    const root = path.join(tmp.path, "proj")
+    const cwd = path.join(root, "apps/web")
+    const file = path.join(root, "node_modules/eslint/lib/api.js")
+    await Filesystem.write(file, "export {}\n")
+    await Filesystem.writeJson(path.join(root, "node_modules/eslint/package.json"), {
+      name: "eslint",
+      main: "lib/api.js",
+    })
+    await Filesystem.write(path.join(cwd, ".keep"), "")
+
+    expect(Module.resolve("eslint", cwd)).toBe(file)
+  })
+
+  test("resolves relative to the provided dir", async () => {
+    await using tmp = await tmpdir()
+    const a = path.join(tmp.path, "a")
+    const b = path.join(tmp.path, "b")
+    const left = path.join(a, "node_modules/biome/index.js")
+    const right = path.join(b, "node_modules/biome/index.js")
+    await Filesystem.write(left, "export {}\n")
+    await Filesystem.write(right, "export {}\n")
+    await Filesystem.writeJson(path.join(a, "node_modules/biome/package.json"), {
+      name: "biome",
+      main: "index.js",
+    })
+    await Filesystem.writeJson(path.join(b, "node_modules/biome/package.json"), {
+      name: "biome",
+      main: "index.js",
+    })
+
+    expect(Module.resolve("biome", a)).toBe(left)
+    expect(Module.resolve("biome", b)).toBe(right)
+    expect(Module.resolve("biome", a)).not.toBe(Module.resolve("biome", b))
+  })
+
+  test("returns undefined when resolution fails", async () => {
+    await using tmp = await tmpdir()
+    expect(Module.resolve("missing-package", tmp.path)).toBeUndefined()
+  })
+})