fix: get cache dir for custom path

README.md

@@ -149,6 +149,8 @@ When `cache: true` is set, the action additionally caches project dependencies b
 
 The dependency cache key format is: `vite-plus-{OS}-{arch}-{pm}-{lockfile-hash}`
 
+When `cache-dependency-path` points to a lock file in a subdirectory, the action resolves the package-manager cache directory from that lock file's directory.
+
 ## Example Workflow
 
 ```yaml

src/cache-restore.ts

@@ -4,23 +4,30 @@ import { warning, info, debug, saveState, setOutput } from "@actions/core";
 import { arch, platform } from "node:os";
 import type { Inputs } from "./types.js";
 import { State, Outputs } from "./types.js";
-import { detectLockFile, getCacheDirectories } from "./utils.js";
+import { detectLockFile, getCacheDirectories, getCacheDirectoryCwd } from "./utils.js";
 
 export async function restoreCache(inputs: Inputs): Promise<void> {
   // Detect lock file
   const lockFile = detectLockFile(inputs.cacheDependencyPath);
   if (!lockFile) {
-    warning("No lock file found. Skipping cache restore.");
+    const message = inputs.cacheDependencyPath
+      ? `No lock file found for cache-dependency-path: ${inputs.cacheDependencyPath}. Skipping cache restore.`
+      : "No lock file found in workspace root. Skipping cache restore.";
+    warning(message);
     setOutput(Outputs.CacheHit, false);
     return;
   }
 
   info(`Using lock file: ${lockFile.path}`);
+  const cacheCwd = getCacheDirectoryCwd(lockFile.path);
+  info(`Resolving dependency cache directory in: ${cacheCwd}`);
 
   // Get cache directories based on lock file type
-  const cachePaths = await getCacheDirectories(lockFile.type);
+  const cachePaths = await getCacheDirectories(lockFile.type, cacheCwd);
   if (!cachePaths.length) {
-    warning("No cache directories found. Skipping cache restore.");
+    warning(
+      `No cache directories found for ${lockFile.type} in ${cacheCwd}. Skipping cache restore.`,
+    );
     setOutput(Outputs.CacheHit, false);
     return;
   }

src/utils.test.ts

@@ -1,9 +1,20 @@
 import { describe, it, expect, beforeEach, afterEach, vi } from "vite-plus/test";
 import { existsSync, readdirSync } from "node:fs";
 import { join } from "node:path";
-import { detectLockFile } from "./utils.js";
+import { getExecOutput } from "@actions/exec";
+import { detectLockFile, getCacheDirectoryCwd, getCacheDirectories } from "./utils.js";
 import { LockFileType } from "./types.js";
 
+vi.mock("@actions/core", () => ({
+  info: vi.fn(),
+  warning: vi.fn(),
+  debug: vi.fn(),
+}));
+
+vi.mock("@actions/exec", () => ({
+  getExecOutput: vi.fn(),
+}));
+
 // Mock fs module
 vi.mock("node:fs", async () => {
   const actual = await vi.importActual<typeof import("node:fs")>("node:fs");
@@ -158,3 +169,50 @@ describe("detectLockFile", () => {
     });
   });
 });
+
+describe("getCacheDirectoryCwd", () => {
+  const mockWorkspace = "/test/workspace";
+
+  beforeEach(() => {
+    vi.stubEnv("GITHUB_WORKSPACE", mockWorkspace);
+  });
+
+  afterEach(() => {
+    vi.unstubAllEnvs();
+  });
+
+  it("should resolve cache cwd from relative lock file path", () => {
+    expect(getCacheDirectoryCwd("web/pnpm-lock.yaml")).toBe("/test/workspace/web");
+  });
+
+  it("should resolve cache cwd from absolute lock file path", () => {
+    expect(getCacheDirectoryCwd("/custom/path/pnpm-lock.yaml")).toBe("/custom/path");
+  });
+});
+
+describe("getCacheDirectories", () => {
+  afterEach(() => {
+    vi.resetAllMocks();
+  });
+
+  it("should run vp pm cache dir in the provided cwd", async () => {
+    vi.mocked(getExecOutput).mockResolvedValue({
+      exitCode: 0,
+      stdout: "/tmp/pnpm-store\n",
+      stderr: "",
+    });
+
+    const result = await getCacheDirectories(LockFileType.Pnpm, "/test/workspace/web");
+
+    expect(result).toEqual(["/tmp/pnpm-store"]);
+    expect(getExecOutput).toHaveBeenCalledWith(
+      "vp",
+      ["pm", "cache", "dir"],
+      expect.objectContaining({
+        cwd: "/test/workspace/web",
+        silent: true,
+        ignoreReturnCode: true,
+      }),
+    );
+  });
+});

src/utils.ts

@@ -2,7 +2,7 @@ import { info, warning, debug } from "@actions/core";
 import { getExecOutput } from "@actions/exec";
 import { existsSync, readdirSync } from "node:fs";
 import { homedir } from "node:os";
-import { isAbsolute, join, basename } from "node:path";
+import { isAbsolute, join, basename, dirname } from "node:path";
 import { LockFileType } from "./types.js";
 import type { LockFileInfo } from "./types.js";
 
@@ -19,6 +19,10 @@ export function resolveWorkspacePath(filePath: string): string {
   return isAbsolute(filePath) ? filePath : join(getWorkspaceDir(), filePath);
 }
 
+export function getCacheDirectoryCwd(lockFilePath: string): string {
+  return dirname(resolveWorkspacePath(lockFilePath));
+}
+
 // Lock file patterns in priority order
 const LOCK_FILES: Array<{ filename: string; type: LockFileType }> = [
   { filename: "pnpm-lock.yaml", type: LockFileType.Pnpm },
@@ -86,21 +90,26 @@ function inferLockFileType(fullPath: string, filename: string): LockFileInfo {
 /**
  * Get cache directories based on package manager type
  */
-export async function getCacheDirectories(lockType: LockFileType): Promise<string[]> {
+export async function getCacheDirectories(lockType: LockFileType, cwd: string): Promise<string[]> {
   switch (lockType) {
     case LockFileType.Npm:
     case LockFileType.Pnpm:
     case LockFileType.Yarn:
-      return getViteCacheDir();
+      return getViteCacheDir(cwd);
     default:
       return [];
   }
 }
 
-async function getCommandOutput(command: string, args: string[]): Promise<string | undefined> {
+async function getCommandOutput(
+  command: string,
+  args: string[],
+  options?: { cwd?: string },
+): Promise<string | undefined> {
   const cmdStr = `${command} ${args.join(" ")}`;
   try {
     const result = await getExecOutput(command, args, {
+      cwd: options?.cwd,
       silent: true,
       ignoreReturnCode: true,
     });
@@ -115,7 +124,7 @@ async function getCommandOutput(command: string, args: string[]): Promise<string
   }
 }
 
-async function getViteCacheDir(): Promise<string[]> {
-  const cacheDir = await getCommandOutput("vp", ["pm", "cache", "dir"]);
+async function getViteCacheDir(cwd: string): Promise<string[]> {
+  const cacheDir = await getCommandOutput("vp", ["pm", "cache", "dir"], { cwd });
   return cacheDir ? [cacheDir] : [];
 }