chore: update known checksums for 0.13.0 (#1089)

chore: update known checksums for 0.13.0

Co-authored-by: zanieb <2586601+zanieb@users.noreply.github.com>

.github/workflows/test.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Actionlint
         uses: eifinger/actionlint-action@1fc89649be682d16ec5cf65ea16e269eb88d3982 # v1.10.2
       - name: Run zizmor
-        uses: zizmorcore/zizmor-action@3dc1ecc9bcb9e94e9b2c709687979e1298497054 # v0.6.2
+        uses: zizmorcore/zizmor-action@70fb788f84895a7701f5643d103d587e460b5c99 # v0.6.3
       - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version-file: .nvmrc
@@ -49,7 +49,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, macos-14, windows-latest]
+        os: [ubuntu-latest, macos-latest, macos-15, windows-latest]
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
@@ -314,7 +314,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, macos-14, windows-latest]
+        os: [ubuntu-latest, macos-latest, macos-15, windows-latest]
     steps:
       - name: Install default version
         uses: $/
@@ -542,8 +542,6 @@ jobs:
             expected-os: "ubuntu-22.04"
           - os: ubuntu-24.04
             expected-os: "ubuntu-24.04"
-          - os: macos-14
-            expected-os: "macos-14"
           - os: macos-15
             expected-os: "macos-15"
           - os: windows-2022

README.md

@@ -15,6 +15,7 @@ Set up your GitHub Actions workflow with a specific version of [uv](https://docs
   - [Inputs](#inputs)
   - [Outputs](#outputs)
   - [Python version](#python-version)
+  - [Python architecture](#python-architecture)
   - [Working directory](#working-directory)
 - [Advanced Configuration](#advanced-configuration)
 - [How it works](#how-it-works)
@@ -56,6 +57,9 @@ Have a look under [Advanced Configuration](#advanced-configuration) for detailed
     # The version of Python to set UV_PYTHON to (overrides the Python version from .tool-versions)
     python-version: ""
 
+    # The Python architecture to set UV_PYTHON_ARCH to, e.g., x86_64 or aarch64
+    python-arch: ""
+
     # Use uv venv to activate a venv ready to be used by later steps
     activate-environment: "false"
 
@@ -193,6 +197,25 @@ jobs:
         run: uv run --frozen pytest
 ```
 
+### Python architecture
+
+Use `python-arch` to set `UV_PYTHON_ARCH` for the rest of the job. This selects the Python
+architecture independently of the version, including versions requested by `.python-version`.
+An explicit architecture or interpreter path in a Python request takes precedence.
+
+```yaml
+- uses: astral-sh/setup-uv@main
+  with:
+    python-version: "3.14"
+    python-arch: x86_64
+- run: uv run --frozen pytest
+```
+
+The input overrides an existing `UV_PYTHON_ARCH` value. When it is omitted, the action respects
+`UV_PYTHON_ARCH` from the environment. Both forms require a uv version that supports the variable;
+the action reports an error if the installed version does not support it. The selected architecture
+is included in the [cache key](docs/caching.md#cache-key).
+
 ### Working directory
 
 You can set the working directory with the `working-directory` input.

__tests__/cache/restore-cache.test.ts

@@ -4,6 +4,9 @@ import { createSetupInputs } from "../helpers/setup-inputs";
 const mockRestoreCache = jest.fn();
 const mockSaveState = jest.fn();
 const mockSetOutput = jest.fn();
+const mockGetArch = jest.fn(() => "x86_64");
+const mockGetOSNameVersion = jest.fn(() => "ubuntu-24.04");
+const mockGetPlatform = jest.fn(async () => "unknown-linux-gnu");
 
 jest.unstable_mockModule("@actions/cache", () => ({
   restoreCache: mockRestoreCache,
@@ -24,9 +27,9 @@ jest.unstable_mockModule("../../src/utils/logging", () => ({
 }));
 
 jest.unstable_mockModule("../../src/utils/platforms", () => ({
-  getArch: jest.fn(() => "x86_64"),
-  getOSNameVersion: jest.fn(() => "ubuntu-24.04"),
-  getPlatform: jest.fn(async () => "unknown-linux-gnu"),
+  getArch: mockGetArch,
+  getOSNameVersion: mockGetOSNameVersion,
+  getPlatform: mockGetPlatform,
 }));
 
 const { restoreCache } = await import("../../src/cache/restore-cache");
@@ -39,6 +42,9 @@ function cacheKeyOutput(): string {
 
 beforeEach(() => {
   jest.clearAllMocks();
+  mockGetArch.mockReturnValue("x86_64");
+  mockGetOSNameVersion.mockReturnValue("ubuntu-24.04");
+  mockGetPlatform.mockResolvedValue("unknown-linux-gnu");
 });
 
 describe("restoreCache", () => {
@@ -71,4 +77,39 @@ describe("restoreCache", () => {
       "setup-uv-2-x86_64-unknown-linux-gnu-ubuntu-24.04-3.11-dependencyhash-tests-3.11",
     );
   });
+
+  it("includes the resolved Python architecture in the cache key", async () => {
+    const inputs = createSetupInputs({ pythonArch: "aarch64" });
+
+    await restoreCache(inputs, "3.14");
+
+    expect(cacheKeyOutput()).toContain("-3.14-python-aarch64-");
+  });
+
+  it.each(["aarch64", "x86_64"])(
+    "separates %s Python caches on a Windows ARM64 runner",
+    async (pythonArch) => {
+      mockGetArch.mockReturnValue("aarch64");
+      mockGetOSNameVersion.mockReturnValue("windows-11");
+      mockGetPlatform.mockResolvedValue("pc-windows-msvc");
+      const inputs = createSetupInputs({
+        cachePython: true,
+        pythonArch,
+        restoreCache: true,
+      });
+
+      await restoreCache(inputs, "3.14");
+
+      const cacheKey = `setup-uv-2-aarch64-pc-windows-msvc-windows-11-3.14-python-${pythonArch}-py-dependencyhash`;
+      expect(cacheKeyOutput()).toBe(cacheKey);
+      expect(mockRestoreCache).toHaveBeenCalledWith(
+        [inputs.cacheLocalPath?.path],
+        cacheKey,
+      );
+      expect(mockRestoreCache).toHaveBeenCalledWith(
+        [inputs.pythonDir],
+        `${cacheKey}-python`,
+      );
+    },
+  );
 });

__tests__/helpers/setup-inputs.ts

@@ -16,11 +16,13 @@ export function createSetupInputs(
     checksum: "",
     downloadFromAstralMirror: false,
     enableCache: true,
+    exportPythonArch: false,
     githubToken: "",
     ignoreEmptyWorkdir: false,
     ignoreNothingToCache: false,
     noProject: false,
     pruneCache: false,
+    pythonArch: "",
     pythonDir: "/tmp/uv-python-dir",
     pythonVersion: "",
     quiet: false,

__tests__/utils/inputs.test.ts

@@ -19,6 +19,7 @@ const ORIGINAL_RUNNER_ENVIRONMENT = process.env.RUNNER_ENVIRONMENT;
 const ORIGINAL_RUNNER_TEMP = process.env.RUNNER_TEMP;
 const ORIGINAL_UV_CACHE_DIR = process.env.UV_CACHE_DIR;
 const ORIGINAL_UV_PYTHON = process.env.UV_PYTHON;
+const ORIGINAL_UV_PYTHON_ARCH = process.env.UV_PYTHON_ARCH;
 const ORIGINAL_UV_PYTHON_INSTALL_DIR = process.env.UV_PYTHON_INSTALL_DIR;
 
 const mockDebug = jest.fn();
@@ -62,6 +63,7 @@ function resetEnvironment(): void {
   delete process.env.RUNNER_TEMP;
   delete process.env.UV_CACHE_DIR;
   delete process.env.UV_PYTHON;
+  delete process.env.UV_PYTHON_ARCH;
   delete process.env.UV_PYTHON_INSTALL_DIR;
 }
 
@@ -77,6 +79,11 @@ function restoreEnvironment(): void {
   process.env.RUNNER_TEMP = ORIGINAL_RUNNER_TEMP;
   process.env.UV_CACHE_DIR = ORIGINAL_UV_CACHE_DIR;
   process.env.UV_PYTHON = ORIGINAL_UV_PYTHON;
+  if (ORIGINAL_UV_PYTHON_ARCH === undefined) {
+    delete process.env.UV_PYTHON_ARCH;
+  } else {
+    process.env.UV_PYTHON_ARCH = ORIGINAL_UV_PYTHON_ARCH;
+  }
   process.env.UV_PYTHON_INSTALL_DIR = ORIGINAL_UV_PYTHON_INSTALL_DIR;
 }
 
@@ -98,6 +105,8 @@ describe("loadInputs", () => {
       source: CacheLocalSource.Default,
     });
     expect(inputs.pythonDir).toBe("/runner-temp/uv-python-dir");
+    expect(inputs.pythonArch).toBe("");
+    expect(inputs.exportPythonArch).toBe(false);
     expect(inputs.venvPath).toBe("/workspace/.venv");
     expect(inputs.manifestFile).toBeUndefined();
     expect(inputs.resolutionStrategy).toBe("highest");
@@ -149,6 +158,28 @@ describe("loadInputs", () => {
     expect(inputs.pythonVersion).toBe("");
   });
 
+  it("prefers the python-arch input over UV_PYTHON_ARCH", () => {
+    mockInputs["working-directory"] = "/workspace";
+    mockInputs["python-arch"] = "x86_64";
+    process.env.UV_PYTHON_ARCH = "aarch64";
+
+    const inputs = loadInputs();
+    expect(inputs.pythonArch).toBe("x86_64");
+    expect(inputs.exportPythonArch).toBe(true);
+  });
+
+  it.each(["aarch64", "x86_64_v3", ""])(
+    "uses UV_PYTHON_ARCH when python-arch is omitted: %s",
+    (pythonArch) => {
+      mockInputs["working-directory"] = "/workspace";
+      process.env.UV_PYTHON_ARCH = pythonArch;
+
+      const inputs = loadInputs();
+      expect(inputs.pythonArch).toBe(pythonArch);
+      expect(inputs.exportPythonArch).toBe(false);
+    },
+  );
+
   it.each(["pull_request_target", "workflow_run", "release"])(
     "disables automatic caching for the %s event",
     (eventName) => {

__tests__/utils/python-arch.test.ts

@@ -0,0 +1,152 @@
+import { promisify } from "node:util";
+import {
+  afterEach,
+  beforeEach,
+  describe,
+  expect,
+  it,
+  jest,
+} from "@jest/globals";
+
+const ORIGINAL_UV_PYTHON_ARCH = process.env.UV_PYTHON_ARCH;
+
+const mockExecFile =
+  jest.fn<
+    (...args: unknown[]) => Promise<{
+      stdout: string;
+      stderr: string;
+    }>
+  >();
+const mockExportVariable = jest.fn();
+
+jest.unstable_mockModule("node:child_process", () => ({
+  execFile: Object.assign(mockExecFile, { [promisify.custom]: mockExecFile }),
+}));
+jest.unstable_mockModule("@actions/core", () => ({
+  exportVariable: mockExportVariable,
+}));
+jest.unstable_mockModule("../../src/utils/logging", () => ({
+  info: jest.fn(),
+}));
+
+const { setupPythonArch } = await import("../../src/utils/python-arch");
+
+const supportedProbe = Object.assign(new Error("uv exited with code 2"), {
+  code: 2,
+  stderr:
+    "error: Failed to parse environment variable `UV_PYTHON_ARCH` with invalid value `setup-uv-probe`: Unknown architecture: setup-uv-probe\n",
+});
+const success = { stderr: "", stdout: "/cache\n" };
+
+beforeEach(() => {
+  delete process.env.UV_PYTHON_ARCH;
+  jest.clearAllMocks();
+  mockExecFile
+    .mockReset()
+    .mockRejectedValueOnce(supportedProbe)
+    .mockResolvedValueOnce(success);
+});
+
+afterEach(() => {
+  if (ORIGINAL_UV_PYTHON_ARCH === undefined) {
+    delete process.env.UV_PYTHON_ARCH;
+  } else {
+    process.env.UV_PYTHON_ARCH = ORIGINAL_UV_PYTHON_ARCH;
+  }
+});
+
+describe("setupPythonArch", () => {
+  it("leaves Python selection alone without an architecture", async () => {
+    await setupPythonArch("/tools/uv", "", false);
+
+    expect(mockExecFile).not.toHaveBeenCalled();
+    expect(mockExportVariable).not.toHaveBeenCalled();
+  });
+
+  it("validates a resolved environment architecture without exporting it", async () => {
+    process.env.UV_PYTHON_ARCH = "aarch64";
+
+    await setupPythonArch("/tools/uv", "aarch64", false);
+
+    expect(mockExecFile).toHaveBeenNthCalledWith(
+      2,
+      "/tools/uv",
+      ["--no-config", "cache", "dir"],
+      expect.objectContaining({
+        env: expect.objectContaining({ UV_PYTHON_ARCH: "aarch64" }),
+      }),
+    );
+    expect(mockExportVariable).not.toHaveBeenCalled();
+    expect(process.env.UV_PYTHON_ARCH).toBe("aarch64");
+  });
+
+  it.each(["/runner temp/uv", "C:\\runner temp\\uv.exe"])(
+    "validates and exports the architecture using the installed uv: %s",
+    async (uvPath) => {
+      await setupPythonArch(uvPath, "x86_64", true);
+
+      expect(mockExecFile).toHaveBeenNthCalledWith(
+        1,
+        uvPath,
+        ["--no-config", "cache", "dir"],
+        expect.objectContaining({
+          encoding: "utf8",
+          env: expect.objectContaining({ UV_PYTHON_ARCH: "setup-uv-probe" }),
+        }),
+      );
+      expect(mockExecFile).toHaveBeenNthCalledWith(
+        2,
+        uvPath,
+        ["--no-config", "cache", "dir"],
+        expect.objectContaining({
+          env: expect.objectContaining({ UV_PYTHON_ARCH: "x86_64" }),
+        }),
+      );
+      expect(mockExportVariable).toHaveBeenCalledWith(
+        "UV_PYTHON_ARCH",
+        "x86_64",
+      );
+    },
+  );
+
+  it("rejects uv versions that ignore UV_PYTHON_ARCH", async () => {
+    mockExecFile.mockReset().mockResolvedValue(success);
+
+    await expect(setupPythonArch("/tools/uv", "x86_64", true)).rejects.toThrow(
+      "The installed version of uv does not support UV_PYTHON_ARCH",
+    );
+    expect(mockExecFile).toHaveBeenCalledTimes(1);
+    expect(mockExportVariable).not.toHaveBeenCalled();
+  });
+
+  it("reports unexpected probe failures", async () => {
+    mockExecFile.mockReset().mockRejectedValue(
+      Object.assign(new Error("uv exited with code 2"), {
+        code: 2,
+        stderr: "error: unrelated configuration error\n",
+      }),
+    );
+
+    await expect(setupPythonArch("/tools/uv", "x86_64", true)).rejects.toThrow(
+      "Failed to check uv's support for UV_PYTHON_ARCH: error: unrelated configuration error",
+    );
+    expect(mockExportVariable).not.toHaveBeenCalled();
+  });
+
+  it("reports invalid architectures before exporting them", async () => {
+    mockExecFile
+      .mockReset()
+      .mockRejectedValueOnce(supportedProbe)
+      .mockRejectedValueOnce(
+        Object.assign(new Error("uv exited with code 2"), {
+          code: 2,
+          stderr: "error: Unknown architecture: invalid\n",
+        }),
+      );
+
+    await expect(setupPythonArch("/tools/uv", "invalid", true)).rejects.toThrow(
+      "Failed to set Python architecture to invalid: error: Unknown architecture: invalid",
+    );
+    expect(mockExportVariable).not.toHaveBeenCalled();
+  });
+});

action-types.yml

@@ -7,6 +7,8 @@ inputs:
     type: string
   python-version:
     type: string
+  python-arch:
+    type: string
   activate-environment:
     type: boolean
   venv-path:

action.yml

@@ -12,6 +12,9 @@ inputs:
   python-version:
     description: "The version of Python to set UV_PYTHON to. Overrides the Python version from .tool-versions."
     required: false
+  python-arch:
+    description: "The Python architecture to set UV_PYTHON_ARCH to, e.g., x86_64 or aarch64. Overrides UV_PYTHON_ARCH."
+    required: false
   activate-environment:
     description: "Use uv venv to activate a venv ready to be used by later steps. "
     default: "false"

dist/save-cache/index.cjs

@@ -64447,6 +64447,9 @@ function loadInputs() {
   const version3 = getInput("version");
   const versionFile = getVersionFile(workingDirectory);
   const pythonVersion = getPythonVersion(versionFile);
+  const pythonArchInput = getInput("python-arch");
+  const pythonArch = pythonArchInput || process.env.UV_PYTHON_ARCH || "";
+  const exportPythonArch = pythonArchInput !== "";
   const activateEnvironment = getBooleanInput("activate-environment");
   const noProject = getBooleanInput("no-project");
   const venvPath = getVenvPath(workingDirectory, activateEnvironment);
@@ -64484,12 +64487,14 @@ function loadInputs() {
     checksum,
     downloadFromAstralMirror,
     enableCache,
+    exportPythonArch,
     githubToken,
     ignoreEmptyWorkdir,
     ignoreNothingToCache,
     manifestFile,
     noProject,
     pruneCache: pruneCache2,
+    pythonArch,
     pythonDir,
     pythonVersion,
     quiet: quiet2,

dist/setup/index.cjs

@@ -10833,7 +10833,7 @@ var require_mock_interceptor = __commonJS({
 var require_mock_client = __commonJS({
   "node_modules/@actions/http-client/node_modules/undici/lib/mock/mock-client.js"(exports2, module2) {
     "use strict";
-    var { promisify: promisify6 } = require("node:util");
+    var { promisify: promisify7 } = require("node:util");
     var Client = require_client();
     var { buildMockDispatch } = require_mock_utils();
     var {
@@ -10873,7 +10873,7 @@ var require_mock_client = __commonJS({
         return new MockInterceptor(opts, this[kDispatches]);
       }
       async [kClose]() {
-        await promisify6(this[kOriginalClose])();
+        await promisify7(this[kOriginalClose])();
         this[kConnected] = 0;
         this[kMockAgent][Symbols.kClients].delete(this[kOrigin]);
       }
@@ -10886,7 +10886,7 @@ var require_mock_client = __commonJS({
 var require_mock_pool = __commonJS({
   "node_modules/@actions/http-client/node_modules/undici/lib/mock/mock-pool.js"(exports2, module2) {
     "use strict";
-    var { promisify: promisify6 } = require("node:util");
+    var { promisify: promisify7 } = require("node:util");
     var Pool = require_pool();
     var { buildMockDispatch } = require_mock_utils();
     var {
@@ -10926,7 +10926,7 @@ var require_mock_pool = __commonJS({
         return new MockInterceptor(opts, this[kDispatches]);
       }
       async [kClose]() {
-        await promisify6(this[kOriginalClose])();
+        await promisify7(this[kOriginalClose])();
         this[kConnected] = 0;
         this[kMockAgent][Symbols.kClients].delete(this[kOrigin]);
       }
@@ -43099,7 +43099,7 @@ var require_mock_interceptor2 = __commonJS({
 var require_mock_client2 = __commonJS({
   "node_modules/undici/lib/mock/mock-client.js"(exports2, module2) {
     "use strict";
-    var { promisify: promisify6 } = require("node:util");
+    var { promisify: promisify7 } = require("node:util");
     var Client = require_client2();
     var { buildMockDispatch } = require_mock_utils2();
     var {
@@ -43147,7 +43147,7 @@ var require_mock_client2 = __commonJS({
         this[kDispatches] = [];
       }
       async [kClose]() {
-        await promisify6(this[kOriginalClose])();
+        await promisify7(this[kOriginalClose])();
         this[kConnected] = 0;
         this[kMockAgent][Symbols.kClients].delete(this[kOrigin]);
       }
@@ -43360,7 +43360,7 @@ var require_mock_call_history = __commonJS({
 var require_mock_pool2 = __commonJS({
   "node_modules/undici/lib/mock/mock-pool.js"(exports2, module2) {
     "use strict";
-    var { promisify: promisify6 } = require("node:util");
+    var { promisify: promisify7 } = require("node:util");
     var Pool = require_pool2();
     var { buildMockDispatch } = require_mock_utils2();
     var {
@@ -43408,7 +43408,7 @@ var require_mock_pool2 = __commonJS({
         this[kDispatches] = [];
       }
       async [kClose]() {
-        await promisify6(this[kOriginalClose])();
+        await promisify7(this[kOriginalClose])();
         this[kConnected] = 0;
         this[kMockAgent][Symbols.kClients].delete(this[kOrigin]);
       }
@@ -94038,11 +94038,12 @@ async function computeKeys(inputs, pythonVersion) {
   }
   const suffix = inputs.cacheSuffix ? `-${encodeURIComponent(inputs.cacheSuffix)}` : "";
   const version3 = encodeURIComponent(pythonVersion ?? "unknown");
+  const pythonArchKey = inputs.pythonArch ? `-python-${encodeURIComponent(inputs.pythonArch)}` : "";
   const platform2 = await getPlatform();
   const osNameVersion = getOSNameVersion();
   const pruned = inputs.pruneCache ? "-pruned" : "";
   const python = inputs.cachePython ? "-py" : "";
-  return `setup-uv-${CACHE_VERSION}-${getArch()}-${platform2}-${osNameVersion}-${version3}${pruned}${python}${cacheDependencyPathHash}${suffix}`;
+  return `setup-uv-${CACHE_VERSION}-${getArch()}-${platform2}-${osNameVersion}-${version3}${pythonArchKey}${pruned}${python}${cacheDependencyPathHash}${suffix}`;
 }
 function handleMatchResult(matchedKey, primaryKey, stateKey, outputKey) {
   if (!matchedKey) {
@@ -94508,6 +94509,150 @@ var fs10 = __toESM(require("node:fs"), 1);
 
 // src/download/checksum/known-checksums.json
 var known_checksums_default = {
+  "aarch64-apple-darwin-0.13.0": "a9c1b29002cf3c83f07fa9cd8a887a3be0107d90e23189721221e7257db8e3d6",
+  "aarch64-pc-windows-msvc-0.13.0": "cb54028b59aa87f11cf6dec293ce000420043a49a8aea522e822a671321f8932",
+  "aarch64-unknown-linux-gnu-0.13.0": "3ccfb6af6e242433eb552f7d9676abd5412c6595c497e990d9c8cb7b5bd4d2c3",
+  "aarch64-unknown-linux-musl-0.13.0": "281ca6cf43f4e26e35474839ad4861be86de42af2682f74134460f5b2071b96d",
+  "arm-unknown-linux-musleabihf-0.13.0": "3f981753e12b6fcf705e05fe00bfe41366c5b5c260ebcea76965821dfc8f6c94",
+  "armv7-unknown-linux-gnueabihf-0.13.0": "e38957791fdd56d356421d81a509b66680d47478870082519340361e5abdbb8b",
+  "armv7-unknown-linux-musleabihf-0.13.0": "8c4e1f37dfcafa8244f0e8f1cd38f1ee597e5091c6e21a60fdd674987f69f8a2",
+  "i686-pc-windows-msvc-0.13.0": "5fca2da976672231e3dcc1d81bb1059781dea3915715fe8f000a916886d183cb",
+  "i686-unknown-linux-gnu-0.13.0": "4ee76d4f81003f04a1aeb6c743330d41a45054f2c69ceee4afdd129dd2786f88",
+  "i686-unknown-linux-musl-0.13.0": "fd9fe1435115fc62fda26cac28b024998d2af39f093f107ef51692d8e24ac7b4",
+  "powerpc64le-unknown-linux-gnu-0.13.0": "2fac854f1249968b91cd3bd6a089faf4cf7f896e407b9e1b3bc03ea0f0373989",
+  "riscv64gc-unknown-linux-gnu-0.13.0": "90f660b61ffb8cefae7a60e1b5915ab3eb828266f6d4593279440f735dcded63",
+  "riscv64gc-unknown-linux-musl-0.13.0": "6bfb5a8f9dce279e12f3ce1b57bef1a51b62ceb1de2c6233b61617883f23d56d",
+  "s390x-unknown-linux-gnu-0.13.0": "7b7b733e9b44eb0d1f5f6275672653c08f5abe2dd930acdc64123d5c69593132",
+  "x86_64-apple-darwin-0.13.0": "5f44dcbde809b632f47c36fadb241cb4d6f9af71d0c8f172b5d2026d3dde742c",
+  "x86_64-pc-windows-msvc-0.13.0": "088962f9e7b7bd9ea740c04c650b2a21c8928c345bd99ac24350dc924dba656c",
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+  "x86_64-unknown-linux-musl-0.12.18": "e38d97460b98ebfd31b197de0fe9fa578add4bc8ba0179b203dd3f87b99f98e6",
   "aarch64-apple-darwin-0.12.17": "85f00cbdc6dd3e97eba4c31b4d014375a9fdfe8f570023b84e5102fc3456896b",
   "aarch64-pc-windows-msvc-0.12.17": "3e1aa6849d77f0e00dc865e4afab5c5b32de053e21fe35bf5ad5cec3734ec976",
   "aarch64-unknown-linux-gnu-0.12.17": "d636d1b678e9e7f367ecb22b46bd1cabbed234d6bc3b4d96365d2b507f72f86c",
@@ -101882,6 +102027,9 @@ function loadInputs() {
   const version3 = getInput("version");
   const versionFile = getVersionFile(workingDirectory);
   const pythonVersion = getPythonVersion(versionFile);
+  const pythonArchInput = getInput("python-arch");
+  const pythonArch = pythonArchInput || process.env.UV_PYTHON_ARCH || "";
+  const exportPythonArch = pythonArchInput !== "";
   const activateEnvironment2 = getBooleanInput("activate-environment");
   const noProject = getBooleanInput("no-project");
   const venvPath = getVenvPath(workingDirectory, activateEnvironment2);
@@ -101919,12 +102067,14 @@ function loadInputs() {
     checksum,
     downloadFromAstralMirror,
     enableCache,
+    exportPythonArch,
     githubToken,
     ignoreEmptyWorkdir,
     ignoreNothingToCache,
     manifestFile,
     noProject,
     pruneCache,
+    pythonArch,
     pythonDir,
     pythonVersion,
     quiet: quiet2,
@@ -102173,16 +102323,68 @@ function getResolutionStrategy() {
   );
 }
 
-// src/utils/python-runtime.ts
+// src/utils/python-arch.ts
 var import_node_child_process = require("node:child_process");
 var import_node_util4 = require("node:util");
 var execFileAsync = (0, import_node_util4.promisify)(import_node_child_process.execFile);
+var PROBE_ARCH = "setup-uv-probe";
+async function setupPythonArch(uvPath, pythonArch, exportPythonArch) {
+  if (pythonArch === "") {
+    return;
+  }
+  const probe = await queryPythonArch(uvPath, PROBE_ARCH);
+  if (probe.exitCode === 0) {
+    throw new Error(
+      "The installed version of uv does not support UV_PYTHON_ARCH. Select a newer uv version or use an architecture-qualified python-version."
+    );
+  }
+  if (!probe.stderr.includes(
+    `environment variable \`UV_PYTHON_ARCH\` with invalid value \`${PROBE_ARCH}\``
+  )) {
+    throw new Error(
+      `Failed to check uv's support for UV_PYTHON_ARCH: ${probe.stderr.trim() || `uv exited with code ${probe.exitCode}`}`
+    );
+  }
+  const selected = await queryPythonArch(uvPath, pythonArch);
+  if (selected.exitCode !== 0) {
+    throw new Error(
+      `Failed to set Python architecture to ${pythonArch}: ${selected.stderr.trim() || `uv exited with code ${selected.exitCode}`}`
+    );
+  }
+  if (exportPythonArch) {
+    exportVariable("UV_PYTHON_ARCH", pythonArch);
+    info2(`Set UV_PYTHON_ARCH to ${pythonArch}`);
+  }
+}
+async function queryPythonArch(uvPath, pythonArch) {
+  try {
+    const { stderr } = await execFileAsync(
+      uvPath,
+      ["--no-config", "cache", "dir"],
+      {
+        encoding: "utf8",
+        env: { ...process.env, NO_COLOR: "1", UV_PYTHON_ARCH: pythonArch }
+      }
+    );
+    return { exitCode: 0, stderr };
+  } catch (error2) {
+    if (error2 instanceof Error && "code" in error2 && typeof error2.code === "number" && "stderr" in error2 && typeof error2.stderr === "string") {
+      return { exitCode: error2.code, stderr: error2.stderr };
+    }
+    throw error2;
+  }
+}
+
+// src/utils/python-runtime.ts
+var import_node_child_process2 = require("node:child_process");
+var import_node_util5 = require("node:util");
+var execFileAsync2 = (0, import_node_util5.promisify)(import_node_child_process2.execFile);
 async function getPythonRuntimeId(inputs) {
   if (!inputs.activateEnvironment) {
     return "";
   }
   try {
-    const { stdout } = await execFileAsync(
+    const { stdout } = await execFileAsync2(
       "uv",
       [
         "python",
@@ -102264,6 +102466,11 @@ async function run() {
       throw new Error(`Unsupported architecture: ${process.arch}`);
     }
     const setupResult = await setupUv(inputs, platform2, arch3);
+    const uvPath = path17.join(
+      setupResult.uvDir,
+      process.platform === "win32" ? "uv.exe" : "uv"
+    );
+    await setupPythonArch(uvPath, inputs.pythonArch, inputs.exportPythonArch);
     addToolBinToPath(inputs);
     addUvToPathAndOutput(setupResult.uvDir);
     setToolDir(inputs);

dist/update-known-checksums/index.cjs

@@ -47182,6 +47182,150 @@ var semver = __toESM(require_semver(), 1);
 
 // src/download/checksum/known-checksums.json
 var known_checksums_default = {
+  "aarch64-apple-darwin-0.13.0": "a9c1b29002cf3c83f07fa9cd8a887a3be0107d90e23189721221e7257db8e3d6",
+  "aarch64-pc-windows-msvc-0.13.0": "cb54028b59aa87f11cf6dec293ce000420043a49a8aea522e822a671321f8932",
+  "aarch64-unknown-linux-gnu-0.13.0": "3ccfb6af6e242433eb552f7d9676abd5412c6595c497e990d9c8cb7b5bd4d2c3",
+  "aarch64-unknown-linux-musl-0.13.0": "281ca6cf43f4e26e35474839ad4861be86de42af2682f74134460f5b2071b96d",
+  "arm-unknown-linux-musleabihf-0.13.0": "3f981753e12b6fcf705e05fe00bfe41366c5b5c260ebcea76965821dfc8f6c94",
+  "armv7-unknown-linux-gnueabihf-0.13.0": "e38957791fdd56d356421d81a509b66680d47478870082519340361e5abdbb8b",
+  "armv7-unknown-linux-musleabihf-0.13.0": "8c4e1f37dfcafa8244f0e8f1cd38f1ee597e5091c6e21a60fdd674987f69f8a2",
+  "i686-pc-windows-msvc-0.13.0": "5fca2da976672231e3dcc1d81bb1059781dea3915715fe8f000a916886d183cb",
+  "i686-unknown-linux-gnu-0.13.0": "4ee76d4f81003f04a1aeb6c743330d41a45054f2c69ceee4afdd129dd2786f88",
+  "i686-unknown-linux-musl-0.13.0": "fd9fe1435115fc62fda26cac28b024998d2af39f093f107ef51692d8e24ac7b4",
+  "powerpc64le-unknown-linux-gnu-0.13.0": "2fac854f1249968b91cd3bd6a089faf4cf7f896e407b9e1b3bc03ea0f0373989",
+  "riscv64gc-unknown-linux-gnu-0.13.0": "90f660b61ffb8cefae7a60e1b5915ab3eb828266f6d4593279440f735dcded63",
+  "riscv64gc-unknown-linux-musl-0.13.0": "6bfb5a8f9dce279e12f3ce1b57bef1a51b62ceb1de2c6233b61617883f23d56d",
+  "s390x-unknown-linux-gnu-0.13.0": "7b7b733e9b44eb0d1f5f6275672653c08f5abe2dd930acdc64123d5c69593132",
+  "x86_64-apple-darwin-0.13.0": "5f44dcbde809b632f47c36fadb241cb4d6f9af71d0c8f172b5d2026d3dde742c",
+  "x86_64-pc-windows-msvc-0.13.0": "088962f9e7b7bd9ea740c04c650b2a21c8928c345bd99ac24350dc924dba656c",
+  "x86_64-unknown-linux-gnu-0.13.0": "1468ebd5a5541121837c5a2817b9972ba6090fa6caa3d142620850a47fb75154",
+  "x86_64-unknown-linux-musl-0.13.0": "b0828fc4cdc47d65951e94b5f0a15a5364420e8dcd88723f3b21e7a2eb30bbc3",
+  "aarch64-apple-darwin-0.12.24": "0c4346de7abdb49495b393b9ec809fe387aa43e586be20fecb972216c1e71732",
+  "aarch64-pc-windows-msvc-0.12.24": "4b783bda5cc44bbae0651a837223873a7acee31152381aef5fc86ef6bef25997",
+  "aarch64-unknown-linux-gnu-0.12.24": "5231be65f496304623895dacdbf1de8504fec90303684bdf05805aa34414dd21",
+  "aarch64-unknown-linux-musl-0.12.24": "7f9ab4726d743b6a92e310477a7840c8a8a7b3938cb3c4657d541342fca75011",
+  "arm-unknown-linux-musleabihf-0.12.24": "c134b64ba9d6e760625ff9239708dffaeb67b612ebb47a774470bd88fac32084",
+  "armv7-unknown-linux-gnueabihf-0.12.24": "7ae5772338fb28f33052c06f82d1acb245df7bc1cb7628184a9baf91e9a101cd",
+  "armv7-unknown-linux-musleabihf-0.12.24": "fe46d0ad949c2901be0ead471109cfed57a082d4ff037cf64d7c7c65e910cdf2",
+  "i686-pc-windows-msvc-0.12.24": "752eda106495f96849951831a419f63796a01dc73ce5ab3cae6d48239527a06e",
+  "i686-unknown-linux-gnu-0.12.24": "89dde6d09ef1ae1e548b78c035ee75d0e2127b6c3991e0754651021c57110296",
+  "i686-unknown-linux-musl-0.12.24": "1d86de046c8be1ed1d7ea383f52469056145ee86a57fb11db5a51b4446d3d365",
+  "powerpc64le-unknown-linux-gnu-0.12.24": "897c61e780aded8062c9011f009b5d2971891b7e97df013c2ae10fca6fd41425",
+  "riscv64gc-unknown-linux-gnu-0.12.24": "c7789e1b3575c4c5a95a73ce280cd7335e4e1d8bf2aa90c606e33c5e3625d2e5",
+  "riscv64gc-unknown-linux-musl-0.12.24": "1adf83ae63acc09d7bd4926f6a1a0d26f819df6972635c0e57aa29d21e1d9797",
+  "s390x-unknown-linux-gnu-0.12.24": "9d2863b384a60f1c44c3e642226d1ffa97c0e6275cbb41f83aa2cdd764f8397c",
+  "x86_64-apple-darwin-0.12.24": "4fa82e37cb94767661f532b001e470b67a186c7260e305bd84ddb78fd545c0b6",
+  "x86_64-pc-windows-msvc-0.12.24": "7c38608c8a18ee137d748a1773053b07ec8f3a30fab49aebaa6f4e4efeceb019",
+  "x86_64-unknown-linux-gnu-0.12.24": "b4dfaef47d491a7296981f8374a4595f55dbf84e8937c8ecd2983574d8bb3da6",
+  "x86_64-unknown-linux-musl-0.12.24": "48170bd200a5430298c18f3b264485a1f3a8605f01088277daf6e37633edf0f5",
+  "aarch64-apple-darwin-0.12.23": "50487ae565ccd96e499056b4674d438f4c53170202617b4c759defe0c6a1b544",
+  "aarch64-pc-windows-msvc-0.12.23": "13294e232ececbe709c06b74e6ced06f2a225ea5591476685362f22be56a50d5",
+  "aarch64-unknown-linux-gnu-0.12.23": "6524bd338177ed50d035d39354e12545e993bbeba2ecbddf0480c5b3a81d313f",
+  "aarch64-unknown-linux-musl-0.12.23": "b536543cc4d50661986b165c76ee8aa9056e4fa332edcd153ff2e98760f9359b",
+  "arm-unknown-linux-musleabihf-0.12.23": "7184501c712c58abc9554e1f4fcc9bacc042ad28e1ad0f42e762a1ed27a151c5",
+  "armv7-unknown-linux-gnueabihf-0.12.23": "4d568920e1f60c4b881cbe2827dfa20592a9a9721f69b57d47650d035c4fe8f6",
+  "armv7-unknown-linux-musleabihf-0.12.23": "f5c941f2a7fa078ffcbc58654ec1b37de98e2a93a24cd3deb19c1acdd66ff533",
+  "i686-pc-windows-msvc-0.12.23": "22a92f4374e4716c2848acaa0392f2f8e4a13b0ff65d080e2a5ade167bce96a8",
+  "i686-unknown-linux-gnu-0.12.23": "52c93c40f6056c4d0e1e259acd60c11f7328416a4f28c85e5f1b04430538aeaa",
+  "i686-unknown-linux-musl-0.12.23": "b3838649e6896734be828e96c6b14f3064882508a7211398c0e3a35f974f501b",
+  "powerpc64le-unknown-linux-gnu-0.12.23": "e8e13421bdecb3f31c0794edfcb8b2e04406f34d645fd9c040f7bd9ace5c3f72",
+  "riscv64gc-unknown-linux-gnu-0.12.23": "661c1a11afc8db4adb20b2d30f789b50e682529b0f1f49e3dd138d86581065b3",
+  "riscv64gc-unknown-linux-musl-0.12.23": "d6dcc450fe1c159540115c8934c76515ee03192c9e61cb983228ad3809e1cc71",
+  "s390x-unknown-linux-gnu-0.12.23": "50c726711cb5f4cdbf45e31c141c9033fdd43146f90ac630c252857c60daf84b",
+  "x86_64-apple-darwin-0.12.23": "960da44cb4b73685206ddd250b19e0a117fa41095710c1038f081f5cb613efb4",
+  "x86_64-pc-windows-msvc-0.12.23": "75d05de6762778c31ee183398de7dd15093fad0ed90b1f236d8205ea5ec00c90",
+  "x86_64-unknown-linux-gnu-0.12.23": "9167d72b3319674b6303c4cbe071854bba13ebdf3d76b1a7cbdc175471fb66d6",
+  "x86_64-unknown-linux-musl-0.12.23": "1cff8783850e794470aadb73f54b749542a511fc57b0ce6468b64bd3852e0ade",
+  "aarch64-apple-darwin-0.12.22": "5d714de09501a59393ceca78f4bc232a50478729640d251907160299b2a93ddd",
+  "aarch64-pc-windows-msvc-0.12.22": "6a42b919c2bb7135f07b4d1bb8e489f0eaab0bae039020573cc522d831e2d32e",
+  "aarch64-unknown-linux-gnu-0.12.22": "6f66a14e8239871fb477f9746c941fedfa77e8fe28a8bc7c07e1dc7f53a66712",
+  "aarch64-unknown-linux-musl-0.12.22": "228bd32c180421a94eef91378a92b2dd63c768bd278430e833250524c4a13382",
+  "arm-unknown-linux-musleabihf-0.12.22": "e7df01f0b9cfec6a82232e0de063cb961e38e4e1a9767295bdee87e148f6dde0",
+  "armv7-unknown-linux-gnueabihf-0.12.22": "ec4d636bce8cc4d2ff0a927f2805671e2d7377e3f3f7b42109d5d4633839fa41",
+  "armv7-unknown-linux-musleabihf-0.12.22": "5f5ea3f80f8ffa47aa47fb8f59b5589eb3619c05ffe7730d8554ead42720f742",
+  "i686-pc-windows-msvc-0.12.22": "a18a913fe4435e5591113ff035077d9461177ad03ab2747eaeb88aee95833a16",
+  "i686-unknown-linux-gnu-0.12.22": "221bbc2362b7cbf651e3fbb0a228c034820bb07f9efe2785c9339828fcdf079b",
+  "i686-unknown-linux-musl-0.12.22": "50dadb6a043359f4762e338691306109ca1df3d3312460a926642dbf8c9f527c",
+  "powerpc64le-unknown-linux-gnu-0.12.22": "17b959094cffb2fd3c3fb9c64d98a1ea8eabfd0bc83507ab08e4ca2187302d1c",
+  "riscv64gc-unknown-linux-gnu-0.12.22": "f25202c8647b4a783b0f04e2c341c617d8d11a8bc72d4ccdcbcc6f0c9d7782f2",
+  "riscv64gc-unknown-linux-musl-0.12.22": "30b29481b4dd28a8cc9d903b66dbe9532781bd25de817fcd9ea5fd37598ef171",
+  "s390x-unknown-linux-gnu-0.12.22": "3672ce2d278239cbc52ba0c962f21556cd49f889a87577ea0801ad7eadc0be73",
+  "x86_64-apple-darwin-0.12.22": "1b8a5b316883df2daf20fb9a446e5b230e01d947d57aba2694977c5ac5a7e98c",
+  "x86_64-pc-windows-msvc-0.12.22": "ea1397797a0ca15f63516dd0f49c2dde9776db9be5861cab152ebe8ad199894d",
+  "x86_64-unknown-linux-gnu-0.12.22": "b9980552309f09c15172b8be828555e375097f16deb459795ce7bfd200380f0b",
+  "x86_64-unknown-linux-musl-0.12.22": "a50fd68c653b0cfb1c85e0a7db62cb78cf5c22b6f3dcf3ae173e5f222d084470",
+  "aarch64-apple-darwin-0.12.21": "b88bda573e566ef9bced66b155fe0408626fbbc053aee1c30ba686f0728c9447",
+  "aarch64-pc-windows-msvc-0.12.21": "93ed53b94e9cec000cacdfd18ca67bc4cb2b6a5f5ec041edd7f2a3dae365ce79",
+  "aarch64-unknown-linux-gnu-0.12.21": "030b69227b40af8c1981b7301793dc66e71ed3c796ea8688209dd268bd91ec51",
+  "aarch64-unknown-linux-musl-0.12.21": "67389a674e62adffa5a395d9a3b80688731c4aa7b33a6def3e62d00f7fec821f",
+  "arm-unknown-linux-musleabihf-0.12.21": "047c43febfaabcf06f6e20361bf99a4fd57b9c391a99e0bff2d410dd647829a6",
+  "armv7-unknown-linux-gnueabihf-0.12.21": "ddb4826a23a9a994da3d868c57b74b1fcb22e29691fc89f8b1702c6a1a9e0df7",
+  "armv7-unknown-linux-musleabihf-0.12.21": "eeb8edc4e5b74ec4521da4d3911153ba8ce24ed8557e2dbbe55d04a6d7a7f45e",
+  "i686-pc-windows-msvc-0.12.21": "66b7ffe136362b8522748c4d43b7e82b846e37e4e9272fcfadffaad8bf7b5a75",
+  "i686-unknown-linux-gnu-0.12.21": "b9ff98d9e6303f8d403af3f002ff1a429867cfcf915f1fa296689b43d9defd52",
+  "i686-unknown-linux-musl-0.12.21": "1492353034d106f2067eeec8f8b6aad1354e13fbb3f91c25a40eb5d44215fd6f",
+  "powerpc64le-unknown-linux-gnu-0.12.21": "c76a8589ed7f447d1e14dc20f060861fecd457a44a287047ef6a49bc6f22ae25",
+  "riscv64gc-unknown-linux-gnu-0.12.21": "202b30dff0f35cd8094e97949c8694b31951f404dd99802e1c997d65d752cf58",
+  "riscv64gc-unknown-linux-musl-0.12.21": "ca1dcb18c0e81c31d006d1ab808fcb4e3a95dde780b1e58805039f84a8ae0b2d",
+  "s390x-unknown-linux-gnu-0.12.21": "556bd11fca37f43a5ec051b5ed82e64b54fe536d6dea2fa84f8b34d2eb3a77d0",
+  "x86_64-apple-darwin-0.12.21": "2b336763b396ec6afa20c5a8b083538ca7402445b868311979d740a4344c17d8",
+  "x86_64-pc-windows-msvc-0.12.21": "5d223efa0bf00208c3853246af09420419dfbd352536aa6bb8163d6170e23890",
+  "x86_64-unknown-linux-gnu-0.12.21": "23f02075b652bb1df64178cfae41b5caf160822e720e2663568f3f5d63bc52c0",
+  "x86_64-unknown-linux-musl-0.12.21": "d69d543a55ec9cdf9d3d9f2648b0a161847e3dbddc477e3be6b5813a6d46f639",
+  "aarch64-apple-darwin-0.12.20": "848fdeb602ff1a1baacd4f6c8b7bdc6cf1ad026a6d9cf59475fda17c179743ca",
+  "aarch64-pc-windows-msvc-0.12.20": "b6bd9218855591742ffd3b00fcf2044b4d2fb6446b6a3545e0dfee447e950388",
+  "aarch64-unknown-linux-gnu-0.12.20": "8a7aad7bc76a2fae5151566ff3e43eacce0b2a113d5e4de3e4afe3e58fa2441e",
+  "aarch64-unknown-linux-musl-0.12.20": "94bb13feeebc6b59a4124016c957cdc9ee406d1476ce2b2ce2991e95b8e820b7",
+  "arm-unknown-linux-musleabihf-0.12.20": "6aeef64cf07b43135d6b1c20bd57809f2d965d0f8a2d5602230d5d55b8245477",
+  "armv7-unknown-linux-gnueabihf-0.12.20": "e1c53318608448ad3b8e7f2e9b069936730a6e7b47831ba5446e4b4f436ee715",
+  "armv7-unknown-linux-musleabihf-0.12.20": "a4c3a0e12e5489f092c93b232ddc4a811a6ea9a03f447f91f88e96867c0bac8d",
+  "i686-pc-windows-msvc-0.12.20": "1a372c273370ae9a7e9aa84020ce91fc1d9ebecbd287c3447e7e99cada0b14f3",
+  "i686-unknown-linux-gnu-0.12.20": "f1e83cc88970ed799b507a8392152d19916dfa0b6c9ae9c8145742035a40d5cb",
+  "i686-unknown-linux-musl-0.12.20": "11d541dd32dd779adbdfef69fe30d7d325036f50d394d3f260a0042998e05499",
+  "powerpc64le-unknown-linux-gnu-0.12.20": "39224a5bfc21a8041afc0315e5d47c86acecf4e669944564950996b516fb5987",
+  "riscv64gc-unknown-linux-gnu-0.12.20": "5cb9df36ca64fb72673c59a77b955b50f3bb907689a98d1d8d640aa3e71f2660",
+  "riscv64gc-unknown-linux-musl-0.12.20": "360e91a317a27bd33978577c57b6f3ed778bdfe8c30c9b613e46fdc33bf8aee8",
+  "s390x-unknown-linux-gnu-0.12.20": "25485439b52cb029afa724c442418ca08a53122100f8cce68ccceb88323ccde2",
+  "x86_64-apple-darwin-0.12.20": "ac54283d211fd77cdc152b67606dbaf6406ff4ab03f3af4ae99468fa8e887141",
+  "x86_64-pc-windows-msvc-0.12.20": "95f9bc30fbb3574d276e28ac4a6de932d25153645853d13da8c21eec3bc88d06",
+  "x86_64-unknown-linux-gnu-0.12.20": "6590717592ace991ff83a63fef799e3ad9d33ecc8f96c5d6bdd732496e79337f",
+  "x86_64-unknown-linux-musl-0.12.20": "14114d66a094f1907af0fcbc863f34226bbb7f5e430e13dce6676ba40dcc6891",
+  "aarch64-apple-darwin-0.12.19": "a9a8df1eedeb192f2e47e40e2faabfb387db4b850209118786d42f89dde3e0ba",
+  "aarch64-pc-windows-msvc-0.12.19": "115b54cb823bc48260670f5782001add6067ac8d98d18c8263a833704e287de9",
+  "aarch64-unknown-linux-gnu-0.12.19": "0804e9b164c64b6914182d5920c08551958a095986f10a3731056df701126436",
+  "aarch64-unknown-linux-musl-0.12.19": "ad8d8448a2ff642ba62c2f684d7dd22a03f8eb3fc9918c2c3e8ec975f4ed6710",
+  "arm-unknown-linux-musleabihf-0.12.19": "173b6b118e444dc3b3a0b6337dd87d66fa79835aa5e059d79e942ae33a850e20",
+  "armv7-unknown-linux-gnueabihf-0.12.19": "f47fe74244c4adcff20637c1aee2550dbc31c81ccf0b2a9537bf98b24bc4028a",
+  "armv7-unknown-linux-musleabihf-0.12.19": "0df353aac087509c47fe660837ca5d284858ef4a5eec4042cbcdeb0118ba0f1b",
+  "i686-pc-windows-msvc-0.12.19": "e1c2d19d1173a0e9f81ba3f95881ad741808133e372610889ff6870629218c7f",
+  "i686-unknown-linux-gnu-0.12.19": "952b0bae707e19b2b5d012b46519a2159be929273d466a1437759f0961be0b93",
+  "i686-unknown-linux-musl-0.12.19": "f923ac32e0e5139950fe1b63abab74d48cabb94b15c90637bc380dadcaf4da40",
+  "powerpc64le-unknown-linux-gnu-0.12.19": "e30649ad846a14bd96440efd45fdb60dcdf8db088fb143064aa78632048ad957",
+  "riscv64gc-unknown-linux-gnu-0.12.19": "50a83ea999ea861a6a853ae1ad0982baad96cc6451e46a5d7e366c4d9475f1bb",
+  "riscv64gc-unknown-linux-musl-0.12.19": "051de9eda7e09dab4c8a304ab2e119317649fee0e24efd0358f410d0c5b3407f",
+  "s390x-unknown-linux-gnu-0.12.19": "e6a9149ea122c1b3b9719ca3577c321376e3c400e004c3cc18231fdb1d35107b",
+  "x86_64-apple-darwin-0.12.19": "cb5fa57bafe68fc0fb94b17f06bee0b0b9a7feb94ccbd110445afa0696e39273",
+  "x86_64-pc-windows-msvc-0.12.19": "6dbb02d79e419522f1c500f0adb1cddcff0cda7d59b0d66ea7f5e3b4a1b2f5f0",
+  "x86_64-unknown-linux-gnu-0.12.19": "23bf5552d220e0842b65c862097b2ebaeba0064b74eda5e565e77fd25969d8c8",
+  "x86_64-unknown-linux-musl-0.12.19": "db7278c9f57981338fddff1fb250e11964bc0a4fafcb9eed8303fdb117dc067b",
+  "aarch64-apple-darwin-0.12.18": "cf40e0c6a202190ccd9e0406dcfdd5b2d6668a9a5c779b17948963df32aafe5b",
+  "aarch64-pc-windows-msvc-0.12.18": "17f27b1c64eacc757ae603579f116a014881e486c5e79ae81877980d4699e943",
+  "aarch64-unknown-linux-gnu-0.12.18": "afb6291f3f0a6b4521fc67b947822506c41dde5b60d2189dd8f3695b2ac8c9e7",
+  "aarch64-unknown-linux-musl-0.12.18": "0796973fb3eea8095078c3d0659bd17a5f6789a71b8dd85caff2483178f78ac3",
+  "arm-unknown-linux-musleabihf-0.12.18": "a37127fb331d5e6228efc1f8549d2447b50c907eee4629347f150a649083619c",
+  "armv7-unknown-linux-gnueabihf-0.12.18": "a38e82350e1e95d5526d1ab81d9b4eb676815c51646243b3b3fbc55b218732d1",
+  "armv7-unknown-linux-musleabihf-0.12.18": "41f0808328f65910bacdb487638475715f949900c7a23b393b3754e2156ff15a",
+  "i686-pc-windows-msvc-0.12.18": "e04c0f1fd9a8703761f9edd64d797ddb2c9a3e6eec0e2fed234a7bd2c2e868b9",
+  "i686-unknown-linux-gnu-0.12.18": "278dbc5dfc6bdde33a553fdba53174cc49daf512a857db1b3c1b5d663290196f",
+  "i686-unknown-linux-musl-0.12.18": "ebfdaaafc447fb2a7329cde879a7748b2ab40ecdcd3d5f04fc0a5d1ab79bb0bd",
+  "powerpc64le-unknown-linux-gnu-0.12.18": "332d174248230ed599a9df0e4e77d6921dbb42ca0fdfbe26eb2a6c999da936b3",
+  "riscv64gc-unknown-linux-gnu-0.12.18": "be88652a03225acbd6bf7204d006b244b0743c8c756a35137c209fa4ff731c41",
+  "riscv64gc-unknown-linux-musl-0.12.18": "29d34dcc833b99b09f78fa11c66fa3c490c3e37c4f0d754e7b84f7147850190e",
+  "s390x-unknown-linux-gnu-0.12.18": "ac412f7ab2a096a7302e0ae8828c7ef84db8a1f7ff97acba8ff8987d46d39cec",
+  "x86_64-apple-darwin-0.12.18": "2e4108f5395397c8bc5d43bf83d3bdbb2d0e92b90d0efa607756be704905fa33",
+  "x86_64-pc-windows-msvc-0.12.18": "cae6a3bc25239f83dffb467a4b180508d9da23986c04639ebfa44e43e6a84bff",
+  "x86_64-unknown-linux-gnu-0.12.18": "89eadd7c76fc063887959510d5ba0ab1264dfd5f1143b925ddb73021a40acf16",
+  "x86_64-unknown-linux-musl-0.12.18": "e38d97460b98ebfd31b197de0fe9fa578add4bc8ba0179b203dd3f87b99f98e6",
   "aarch64-apple-darwin-0.12.17": "85f00cbdc6dd3e97eba4c31b4d014375a9fdfe8f570023b84e5102fc3456896b",
   "aarch64-pc-windows-msvc-0.12.17": "3e1aa6849d77f0e00dc865e4afab5c5b32de053e21fe35bf5ad5cec3734ec976",
   "aarch64-unknown-linux-gnu-0.12.17": "d636d1b678e9e7f367ecb22b46bd1cabbed234d6bc3b4d96365d2b507f72f86c",

docs/caching.md

@@ -11,6 +11,7 @@ The cache key is automatically generated based on:
   `pc-windows-msvc`)
 - **OS version**: OS name and version (e.g., `ubuntu-22.04`, `macos-14`, `windows-2022`)
 - **Python version**: The Python version in use
+- **Python architecture**: The architecture selected by `python-arch` or `UV_PYTHON_ARCH`, when set
 - **Cache options**: Whether pruning and Python caching are enabled
 - **Dependency hash**: Hash of files matching `cache-dependency-glob`
 - **Suffix**: Optional `cache-suffix` if provided

docs/environment-and-tools.md

@@ -144,6 +144,7 @@ If you want to ignore this, set the `ignore-empty-workdir` input to `true`.
 This action sets several environment variables that influence uv's behavior and can be used by subsequent steps:
 
 - `UV_PYTHON`: Set when `python-version` is specified or the selected `.tool-versions` file contains a supported `python` entry. Controls which Python version uv uses.
+- `UV_PYTHON_ARCH`: Set when `python-arch` is specified. Controls the architecture of Python requests that do not specify one.
 - `UV_CACHE_DIR`: Set when caching is enabled (unless already configured in uv config files). Controls where uv stores its cache.
 - `UV_TOOL_DIR`: Set when `tool-dir` input is specified. Controls where uv installs tool environments.
 - `UV_TOOL_BIN_DIR`: Set when `tool-bin-dir` input is specified. Controls where uv installs tool binaries.
@@ -155,6 +156,7 @@ This action sets several environment variables that influence uv's behavior and
 - `UV_NO_MODIFY_PATH`: If set, prevents the action from modifying PATH. Cannot be used with `activate-environment`.
 - `UV_CACHE_DIR`: If already set, the action will respect it instead of setting its own cache directory.
 - `UV_PYTHON`: If already set and `python-version` is not specified, the action will respect it instead of using the `python` entry from `.tool-versions`.
+- `UV_PYTHON_ARCH`: If already set and `python-arch` is not specified, the action will use it and include it in the cache key. Requires a uv version that supports `UV_PYTHON_ARCH`.
 
 ```yaml
 - name: Example using environment variables

src/cache/restore-cache.ts

@@ -98,11 +98,14 @@ async function computeKeys(
     ? `-${encodeURIComponent(inputs.cacheSuffix)}`
     : "";
   const version = encodeURIComponent(pythonVersion ?? "unknown");
+  const pythonArchKey = inputs.pythonArch
+    ? `-python-${encodeURIComponent(inputs.pythonArch)}`
+    : "";
   const platform = await getPlatform();
   const osNameVersion = getOSNameVersion();
   const pruned = inputs.pruneCache ? "-pruned" : "";
   const python = inputs.cachePython ? "-py" : "";
-  return `setup-uv-${CACHE_VERSION}-${getArch()}-${platform}-${osNameVersion}-${version}${pruned}${python}${cacheDependencyPathHash}${suffix}`;
+  return `setup-uv-${CACHE_VERSION}-${getArch()}-${platform}-${osNameVersion}-${version}${pythonArchKey}${pruned}${python}${cacheDependencyPathHash}${suffix}`;
 }
 
 function handleMatchResult(

src/download/checksum/known-checksums.json

@@ -1,4 +1,148 @@
 {
+  "aarch64-apple-darwin-0.13.0": "a9c1b29002cf3c83f07fa9cd8a887a3be0107d90e23189721221e7257db8e3d6",
+  "aarch64-pc-windows-msvc-0.13.0": "cb54028b59aa87f11cf6dec293ce000420043a49a8aea522e822a671321f8932",
+  "aarch64-unknown-linux-gnu-0.13.0": "3ccfb6af6e242433eb552f7d9676abd5412c6595c497e990d9c8cb7b5bd4d2c3",
+  "aarch64-unknown-linux-musl-0.13.0": "281ca6cf43f4e26e35474839ad4861be86de42af2682f74134460f5b2071b96d",
+  "arm-unknown-linux-musleabihf-0.13.0": "3f981753e12b6fcf705e05fe00bfe41366c5b5c260ebcea76965821dfc8f6c94",
+  "armv7-unknown-linux-gnueabihf-0.13.0": "e38957791fdd56d356421d81a509b66680d47478870082519340361e5abdbb8b",
+  "armv7-unknown-linux-musleabihf-0.13.0": "8c4e1f37dfcafa8244f0e8f1cd38f1ee597e5091c6e21a60fdd674987f69f8a2",
+  "i686-pc-windows-msvc-0.13.0": "5fca2da976672231e3dcc1d81bb1059781dea3915715fe8f000a916886d183cb",
+  "i686-unknown-linux-gnu-0.13.0": "4ee76d4f81003f04a1aeb6c743330d41a45054f2c69ceee4afdd129dd2786f88",
+  "i686-unknown-linux-musl-0.13.0": "fd9fe1435115fc62fda26cac28b024998d2af39f093f107ef51692d8e24ac7b4",
+  "powerpc64le-unknown-linux-gnu-0.13.0": "2fac854f1249968b91cd3bd6a089faf4cf7f896e407b9e1b3bc03ea0f0373989",
+  "riscv64gc-unknown-linux-gnu-0.13.0": "90f660b61ffb8cefae7a60e1b5915ab3eb828266f6d4593279440f735dcded63",
+  "riscv64gc-unknown-linux-musl-0.13.0": "6bfb5a8f9dce279e12f3ce1b57bef1a51b62ceb1de2c6233b61617883f23d56d",
+  "s390x-unknown-linux-gnu-0.13.0": "7b7b733e9b44eb0d1f5f6275672653c08f5abe2dd930acdc64123d5c69593132",
+  "x86_64-apple-darwin-0.13.0": "5f44dcbde809b632f47c36fadb241cb4d6f9af71d0c8f172b5d2026d3dde742c",
+  "x86_64-pc-windows-msvc-0.13.0": "088962f9e7b7bd9ea740c04c650b2a21c8928c345bd99ac24350dc924dba656c",
+  "x86_64-unknown-linux-gnu-0.13.0": "1468ebd5a5541121837c5a2817b9972ba6090fa6caa3d142620850a47fb75154",
+  "x86_64-unknown-linux-musl-0.13.0": "b0828fc4cdc47d65951e94b5f0a15a5364420e8dcd88723f3b21e7a2eb30bbc3",
+  "aarch64-apple-darwin-0.12.24": "0c4346de7abdb49495b393b9ec809fe387aa43e586be20fecb972216c1e71732",
+  "aarch64-pc-windows-msvc-0.12.24": "4b783bda5cc44bbae0651a837223873a7acee31152381aef5fc86ef6bef25997",
+  "aarch64-unknown-linux-gnu-0.12.24": "5231be65f496304623895dacdbf1de8504fec90303684bdf05805aa34414dd21",
+  "aarch64-unknown-linux-musl-0.12.24": "7f9ab4726d743b6a92e310477a7840c8a8a7b3938cb3c4657d541342fca75011",
+  "arm-unknown-linux-musleabihf-0.12.24": "c134b64ba9d6e760625ff9239708dffaeb67b612ebb47a774470bd88fac32084",
+  "armv7-unknown-linux-gnueabihf-0.12.24": "7ae5772338fb28f33052c06f82d1acb245df7bc1cb7628184a9baf91e9a101cd",
+  "armv7-unknown-linux-musleabihf-0.12.24": "fe46d0ad949c2901be0ead471109cfed57a082d4ff037cf64d7c7c65e910cdf2",
+  "i686-pc-windows-msvc-0.12.24": "752eda106495f96849951831a419f63796a01dc73ce5ab3cae6d48239527a06e",
+  "i686-unknown-linux-gnu-0.12.24": "89dde6d09ef1ae1e548b78c035ee75d0e2127b6c3991e0754651021c57110296",
+  "i686-unknown-linux-musl-0.12.24": "1d86de046c8be1ed1d7ea383f52469056145ee86a57fb11db5a51b4446d3d365",
+  "powerpc64le-unknown-linux-gnu-0.12.24": "897c61e780aded8062c9011f009b5d2971891b7e97df013c2ae10fca6fd41425",
+  "riscv64gc-unknown-linux-gnu-0.12.24": "c7789e1b3575c4c5a95a73ce280cd7335e4e1d8bf2aa90c606e33c5e3625d2e5",
+  "riscv64gc-unknown-linux-musl-0.12.24": "1adf83ae63acc09d7bd4926f6a1a0d26f819df6972635c0e57aa29d21e1d9797",
+  "s390x-unknown-linux-gnu-0.12.24": "9d2863b384a60f1c44c3e642226d1ffa97c0e6275cbb41f83aa2cdd764f8397c",
+  "x86_64-apple-darwin-0.12.24": "4fa82e37cb94767661f532b001e470b67a186c7260e305bd84ddb78fd545c0b6",
+  "x86_64-pc-windows-msvc-0.12.24": "7c38608c8a18ee137d748a1773053b07ec8f3a30fab49aebaa6f4e4efeceb019",
+  "x86_64-unknown-linux-gnu-0.12.24": "b4dfaef47d491a7296981f8374a4595f55dbf84e8937c8ecd2983574d8bb3da6",
+  "x86_64-unknown-linux-musl-0.12.24": "48170bd200a5430298c18f3b264485a1f3a8605f01088277daf6e37633edf0f5",
+  "aarch64-apple-darwin-0.12.23": "50487ae565ccd96e499056b4674d438f4c53170202617b4c759defe0c6a1b544",
+  "aarch64-pc-windows-msvc-0.12.23": "13294e232ececbe709c06b74e6ced06f2a225ea5591476685362f22be56a50d5",
+  "aarch64-unknown-linux-gnu-0.12.23": "6524bd338177ed50d035d39354e12545e993bbeba2ecbddf0480c5b3a81d313f",
+  "aarch64-unknown-linux-musl-0.12.23": "b536543cc4d50661986b165c76ee8aa9056e4fa332edcd153ff2e98760f9359b",
+  "arm-unknown-linux-musleabihf-0.12.23": "7184501c712c58abc9554e1f4fcc9bacc042ad28e1ad0f42e762a1ed27a151c5",
+  "armv7-unknown-linux-gnueabihf-0.12.23": "4d568920e1f60c4b881cbe2827dfa20592a9a9721f69b57d47650d035c4fe8f6",
+  "armv7-unknown-linux-musleabihf-0.12.23": "f5c941f2a7fa078ffcbc58654ec1b37de98e2a93a24cd3deb19c1acdd66ff533",
+  "i686-pc-windows-msvc-0.12.23": "22a92f4374e4716c2848acaa0392f2f8e4a13b0ff65d080e2a5ade167bce96a8",
+  "i686-unknown-linux-gnu-0.12.23": "52c93c40f6056c4d0e1e259acd60c11f7328416a4f28c85e5f1b04430538aeaa",
+  "i686-unknown-linux-musl-0.12.23": "b3838649e6896734be828e96c6b14f3064882508a7211398c0e3a35f974f501b",
+  "powerpc64le-unknown-linux-gnu-0.12.23": "e8e13421bdecb3f31c0794edfcb8b2e04406f34d645fd9c040f7bd9ace5c3f72",
+  "riscv64gc-unknown-linux-gnu-0.12.23": "661c1a11afc8db4adb20b2d30f789b50e682529b0f1f49e3dd138d86581065b3",
+  "riscv64gc-unknown-linux-musl-0.12.23": "d6dcc450fe1c159540115c8934c76515ee03192c9e61cb983228ad3809e1cc71",
+  "s390x-unknown-linux-gnu-0.12.23": "50c726711cb5f4cdbf45e31c141c9033fdd43146f90ac630c252857c60daf84b",
+  "x86_64-apple-darwin-0.12.23": "960da44cb4b73685206ddd250b19e0a117fa41095710c1038f081f5cb613efb4",
+  "x86_64-pc-windows-msvc-0.12.23": "75d05de6762778c31ee183398de7dd15093fad0ed90b1f236d8205ea5ec00c90",
+  "x86_64-unknown-linux-gnu-0.12.23": "9167d72b3319674b6303c4cbe071854bba13ebdf3d76b1a7cbdc175471fb66d6",
+  "x86_64-unknown-linux-musl-0.12.23": "1cff8783850e794470aadb73f54b749542a511fc57b0ce6468b64bd3852e0ade",
+  "aarch64-apple-darwin-0.12.22": "5d714de09501a59393ceca78f4bc232a50478729640d251907160299b2a93ddd",
+  "aarch64-pc-windows-msvc-0.12.22": "6a42b919c2bb7135f07b4d1bb8e489f0eaab0bae039020573cc522d831e2d32e",
+  "aarch64-unknown-linux-gnu-0.12.22": "6f66a14e8239871fb477f9746c941fedfa77e8fe28a8bc7c07e1dc7f53a66712",
+  "aarch64-unknown-linux-musl-0.12.22": "228bd32c180421a94eef91378a92b2dd63c768bd278430e833250524c4a13382",
+  "arm-unknown-linux-musleabihf-0.12.22": "e7df01f0b9cfec6a82232e0de063cb961e38e4e1a9767295bdee87e148f6dde0",
+  "armv7-unknown-linux-gnueabihf-0.12.22": "ec4d636bce8cc4d2ff0a927f2805671e2d7377e3f3f7b42109d5d4633839fa41",
+  "armv7-unknown-linux-musleabihf-0.12.22": "5f5ea3f80f8ffa47aa47fb8f59b5589eb3619c05ffe7730d8554ead42720f742",
+  "i686-pc-windows-msvc-0.12.22": "a18a913fe4435e5591113ff035077d9461177ad03ab2747eaeb88aee95833a16",
+  "i686-unknown-linux-gnu-0.12.22": "221bbc2362b7cbf651e3fbb0a228c034820bb07f9efe2785c9339828fcdf079b",
+  "i686-unknown-linux-musl-0.12.22": "50dadb6a043359f4762e338691306109ca1df3d3312460a926642dbf8c9f527c",
+  "powerpc64le-unknown-linux-gnu-0.12.22": "17b959094cffb2fd3c3fb9c64d98a1ea8eabfd0bc83507ab08e4ca2187302d1c",
+  "riscv64gc-unknown-linux-gnu-0.12.22": "f25202c8647b4a783b0f04e2c341c617d8d11a8bc72d4ccdcbcc6f0c9d7782f2",
+  "riscv64gc-unknown-linux-musl-0.12.22": "30b29481b4dd28a8cc9d903b66dbe9532781bd25de817fcd9ea5fd37598ef171",
+  "s390x-unknown-linux-gnu-0.12.22": "3672ce2d278239cbc52ba0c962f21556cd49f889a87577ea0801ad7eadc0be73",
+  "x86_64-apple-darwin-0.12.22": "1b8a5b316883df2daf20fb9a446e5b230e01d947d57aba2694977c5ac5a7e98c",
+  "x86_64-pc-windows-msvc-0.12.22": "ea1397797a0ca15f63516dd0f49c2dde9776db9be5861cab152ebe8ad199894d",
+  "x86_64-unknown-linux-gnu-0.12.22": "b9980552309f09c15172b8be828555e375097f16deb459795ce7bfd200380f0b",
+  "x86_64-unknown-linux-musl-0.12.22": "a50fd68c653b0cfb1c85e0a7db62cb78cf5c22b6f3dcf3ae173e5f222d084470",
+  "aarch64-apple-darwin-0.12.21": "b88bda573e566ef9bced66b155fe0408626fbbc053aee1c30ba686f0728c9447",
+  "aarch64-pc-windows-msvc-0.12.21": "93ed53b94e9cec000cacdfd18ca67bc4cb2b6a5f5ec041edd7f2a3dae365ce79",
+  "aarch64-unknown-linux-gnu-0.12.21": "030b69227b40af8c1981b7301793dc66e71ed3c796ea8688209dd268bd91ec51",
+  "aarch64-unknown-linux-musl-0.12.21": "67389a674e62adffa5a395d9a3b80688731c4aa7b33a6def3e62d00f7fec821f",
+  "arm-unknown-linux-musleabihf-0.12.21": "047c43febfaabcf06f6e20361bf99a4fd57b9c391a99e0bff2d410dd647829a6",
+  "armv7-unknown-linux-gnueabihf-0.12.21": "ddb4826a23a9a994da3d868c57b74b1fcb22e29691fc89f8b1702c6a1a9e0df7",
+  "armv7-unknown-linux-musleabihf-0.12.21": "eeb8edc4e5b74ec4521da4d3911153ba8ce24ed8557e2dbbe55d04a6d7a7f45e",
+  "i686-pc-windows-msvc-0.12.21": "66b7ffe136362b8522748c4d43b7e82b846e37e4e9272fcfadffaad8bf7b5a75",
+  "i686-unknown-linux-gnu-0.12.21": "b9ff98d9e6303f8d403af3f002ff1a429867cfcf915f1fa296689b43d9defd52",
+  "i686-unknown-linux-musl-0.12.21": "1492353034d106f2067eeec8f8b6aad1354e13fbb3f91c25a40eb5d44215fd6f",
+  "powerpc64le-unknown-linux-gnu-0.12.21": "c76a8589ed7f447d1e14dc20f060861fecd457a44a287047ef6a49bc6f22ae25",
+  "riscv64gc-unknown-linux-gnu-0.12.21": "202b30dff0f35cd8094e97949c8694b31951f404dd99802e1c997d65d752cf58",
+  "riscv64gc-unknown-linux-musl-0.12.21": "ca1dcb18c0e81c31d006d1ab808fcb4e3a95dde780b1e58805039f84a8ae0b2d",
+  "s390x-unknown-linux-gnu-0.12.21": "556bd11fca37f43a5ec051b5ed82e64b54fe536d6dea2fa84f8b34d2eb3a77d0",
+  "x86_64-apple-darwin-0.12.21": "2b336763b396ec6afa20c5a8b083538ca7402445b868311979d740a4344c17d8",
+  "x86_64-pc-windows-msvc-0.12.21": "5d223efa0bf00208c3853246af09420419dfbd352536aa6bb8163d6170e23890",
+  "x86_64-unknown-linux-gnu-0.12.21": "23f02075b652bb1df64178cfae41b5caf160822e720e2663568f3f5d63bc52c0",
+  "x86_64-unknown-linux-musl-0.12.21": "d69d543a55ec9cdf9d3d9f2648b0a161847e3dbddc477e3be6b5813a6d46f639",
+  "aarch64-apple-darwin-0.12.20": "848fdeb602ff1a1baacd4f6c8b7bdc6cf1ad026a6d9cf59475fda17c179743ca",
+  "aarch64-pc-windows-msvc-0.12.20": "b6bd9218855591742ffd3b00fcf2044b4d2fb6446b6a3545e0dfee447e950388",
+  "aarch64-unknown-linux-gnu-0.12.20": "8a7aad7bc76a2fae5151566ff3e43eacce0b2a113d5e4de3e4afe3e58fa2441e",
+  "aarch64-unknown-linux-musl-0.12.20": "94bb13feeebc6b59a4124016c957cdc9ee406d1476ce2b2ce2991e95b8e820b7",
+  "arm-unknown-linux-musleabihf-0.12.20": "6aeef64cf07b43135d6b1c20bd57809f2d965d0f8a2d5602230d5d55b8245477",
+  "armv7-unknown-linux-gnueabihf-0.12.20": "e1c53318608448ad3b8e7f2e9b069936730a6e7b47831ba5446e4b4f436ee715",
+  "armv7-unknown-linux-musleabihf-0.12.20": "a4c3a0e12e5489f092c93b232ddc4a811a6ea9a03f447f91f88e96867c0bac8d",
+  "i686-pc-windows-msvc-0.12.20": "1a372c273370ae9a7e9aa84020ce91fc1d9ebecbd287c3447e7e99cada0b14f3",
+  "i686-unknown-linux-gnu-0.12.20": "f1e83cc88970ed799b507a8392152d19916dfa0b6c9ae9c8145742035a40d5cb",
+  "i686-unknown-linux-musl-0.12.20": "11d541dd32dd779adbdfef69fe30d7d325036f50d394d3f260a0042998e05499",
+  "powerpc64le-unknown-linux-gnu-0.12.20": "39224a5bfc21a8041afc0315e5d47c86acecf4e669944564950996b516fb5987",
+  "riscv64gc-unknown-linux-gnu-0.12.20": "5cb9df36ca64fb72673c59a77b955b50f3bb907689a98d1d8d640aa3e71f2660",
+  "riscv64gc-unknown-linux-musl-0.12.20": "360e91a317a27bd33978577c57b6f3ed778bdfe8c30c9b613e46fdc33bf8aee8",
+  "s390x-unknown-linux-gnu-0.12.20": "25485439b52cb029afa724c442418ca08a53122100f8cce68ccceb88323ccde2",
+  "x86_64-apple-darwin-0.12.20": "ac54283d211fd77cdc152b67606dbaf6406ff4ab03f3af4ae99468fa8e887141",
+  "x86_64-pc-windows-msvc-0.12.20": "95f9bc30fbb3574d276e28ac4a6de932d25153645853d13da8c21eec3bc88d06",
+  "x86_64-unknown-linux-gnu-0.12.20": "6590717592ace991ff83a63fef799e3ad9d33ecc8f96c5d6bdd732496e79337f",
+  "x86_64-unknown-linux-musl-0.12.20": "14114d66a094f1907af0fcbc863f34226bbb7f5e430e13dce6676ba40dcc6891",
+  "aarch64-apple-darwin-0.12.19": "a9a8df1eedeb192f2e47e40e2faabfb387db4b850209118786d42f89dde3e0ba",
+  "aarch64-pc-windows-msvc-0.12.19": "115b54cb823bc48260670f5782001add6067ac8d98d18c8263a833704e287de9",
+  "aarch64-unknown-linux-gnu-0.12.19": "0804e9b164c64b6914182d5920c08551958a095986f10a3731056df701126436",
+  "aarch64-unknown-linux-musl-0.12.19": "ad8d8448a2ff642ba62c2f684d7dd22a03f8eb3fc9918c2c3e8ec975f4ed6710",
+  "arm-unknown-linux-musleabihf-0.12.19": "173b6b118e444dc3b3a0b6337dd87d66fa79835aa5e059d79e942ae33a850e20",
+  "armv7-unknown-linux-gnueabihf-0.12.19": "f47fe74244c4adcff20637c1aee2550dbc31c81ccf0b2a9537bf98b24bc4028a",
+  "armv7-unknown-linux-musleabihf-0.12.19": "0df353aac087509c47fe660837ca5d284858ef4a5eec4042cbcdeb0118ba0f1b",
+  "i686-pc-windows-msvc-0.12.19": "e1c2d19d1173a0e9f81ba3f95881ad741808133e372610889ff6870629218c7f",
+  "i686-unknown-linux-gnu-0.12.19": "952b0bae707e19b2b5d012b46519a2159be929273d466a1437759f0961be0b93",
+  "i686-unknown-linux-musl-0.12.19": "f923ac32e0e5139950fe1b63abab74d48cabb94b15c90637bc380dadcaf4da40",
+  "powerpc64le-unknown-linux-gnu-0.12.19": "e30649ad846a14bd96440efd45fdb60dcdf8db088fb143064aa78632048ad957",
+  "riscv64gc-unknown-linux-gnu-0.12.19": "50a83ea999ea861a6a853ae1ad0982baad96cc6451e46a5d7e366c4d9475f1bb",
+  "riscv64gc-unknown-linux-musl-0.12.19": "051de9eda7e09dab4c8a304ab2e119317649fee0e24efd0358f410d0c5b3407f",
+  "s390x-unknown-linux-gnu-0.12.19": "e6a9149ea122c1b3b9719ca3577c321376e3c400e004c3cc18231fdb1d35107b",
+  "x86_64-apple-darwin-0.12.19": "cb5fa57bafe68fc0fb94b17f06bee0b0b9a7feb94ccbd110445afa0696e39273",
+  "x86_64-pc-windows-msvc-0.12.19": "6dbb02d79e419522f1c500f0adb1cddcff0cda7d59b0d66ea7f5e3b4a1b2f5f0",
+  "x86_64-unknown-linux-gnu-0.12.19": "23bf5552d220e0842b65c862097b2ebaeba0064b74eda5e565e77fd25969d8c8",
+  "x86_64-unknown-linux-musl-0.12.19": "db7278c9f57981338fddff1fb250e11964bc0a4fafcb9eed8303fdb117dc067b",
+  "aarch64-apple-darwin-0.12.18": "cf40e0c6a202190ccd9e0406dcfdd5b2d6668a9a5c779b17948963df32aafe5b",
+  "aarch64-pc-windows-msvc-0.12.18": "17f27b1c64eacc757ae603579f116a014881e486c5e79ae81877980d4699e943",
+  "aarch64-unknown-linux-gnu-0.12.18": "afb6291f3f0a6b4521fc67b947822506c41dde5b60d2189dd8f3695b2ac8c9e7",
+  "aarch64-unknown-linux-musl-0.12.18": "0796973fb3eea8095078c3d0659bd17a5f6789a71b8dd85caff2483178f78ac3",
+  "arm-unknown-linux-musleabihf-0.12.18": "a37127fb331d5e6228efc1f8549d2447b50c907eee4629347f150a649083619c",
+  "armv7-unknown-linux-gnueabihf-0.12.18": "a38e82350e1e95d5526d1ab81d9b4eb676815c51646243b3b3fbc55b218732d1",
+  "armv7-unknown-linux-musleabihf-0.12.18": "41f0808328f65910bacdb487638475715f949900c7a23b393b3754e2156ff15a",
+  "i686-pc-windows-msvc-0.12.18": "e04c0f1fd9a8703761f9edd64d797ddb2c9a3e6eec0e2fed234a7bd2c2e868b9",
+  "i686-unknown-linux-gnu-0.12.18": "278dbc5dfc6bdde33a553fdba53174cc49daf512a857db1b3c1b5d663290196f",
+  "i686-unknown-linux-musl-0.12.18": "ebfdaaafc447fb2a7329cde879a7748b2ab40ecdcd3d5f04fc0a5d1ab79bb0bd",
+  "powerpc64le-unknown-linux-gnu-0.12.18": "332d174248230ed599a9df0e4e77d6921dbb42ca0fdfbe26eb2a6c999da936b3",
+  "riscv64gc-unknown-linux-gnu-0.12.18": "be88652a03225acbd6bf7204d006b244b0743c8c756a35137c209fa4ff731c41",
+  "riscv64gc-unknown-linux-musl-0.12.18": "29d34dcc833b99b09f78fa11c66fa3c490c3e37c4f0d754e7b84f7147850190e",
+  "s390x-unknown-linux-gnu-0.12.18": "ac412f7ab2a096a7302e0ae8828c7ef84db8a1f7ff97acba8ff8987d46d39cec",
+  "x86_64-apple-darwin-0.12.18": "2e4108f5395397c8bc5d43bf83d3bdbb2d0e92b90d0efa607756be704905fa33",
+  "x86_64-pc-windows-msvc-0.12.18": "cae6a3bc25239f83dffb467a4b180508d9da23986c04639ebfa44e43e6a84bff",
+  "x86_64-unknown-linux-gnu-0.12.18": "89eadd7c76fc063887959510d5ba0ab1264dfd5f1143b925ddb73021a40acf16",
+  "x86_64-unknown-linux-musl-0.12.18": "e38d97460b98ebfd31b197de0fe9fa578add4bc8ba0179b203dd3f87b99f98e6",
   "aarch64-apple-darwin-0.12.17": "85f00cbdc6dd3e97eba4c31b4d014375a9fdfe8f570023b84e5102fc3456896b",
   "aarch64-pc-windows-msvc-0.12.17": "3e1aa6849d77f0e00dc865e4afab5c5b32de053e21fe35bf5ad5cec3734ec976",
   "aarch64-unknown-linux-gnu-0.12.17": "d636d1b678e9e7f367ecb22b46bd1cabbed234d6bc3b4d96365d2b507f72f86c",

src/setup-uv.ts

@@ -16,6 +16,7 @@ import {
   getPlatform,
   type Platform,
 } from "./utils/platforms";
+import { setupPythonArch } from "./utils/python-arch";
 import { getPythonRuntimeId } from "./utils/python-runtime";
 import { resolveUvVersion } from "./version/resolve";
 
@@ -86,6 +87,11 @@ async function run(): Promise<void> {
       throw new Error(`Unsupported architecture: ${process.arch}`);
     }
     const setupResult = await setupUv(inputs, platform, arch);
+    const uvPath = path.join(
+      setupResult.uvDir,
+      process.platform === "win32" ? "uv.exe" : "uv",
+    );
+    await setupPythonArch(uvPath, inputs.pythonArch, inputs.exportPythonArch);
 
     addToolBinToPath(inputs);
     addUvToPathAndOutput(setupResult.uvDir);

src/utils/inputs.ts

@@ -24,6 +24,8 @@ export interface SetupInputs {
   version: string;
   versionFile: string;
   pythonVersion: string;
+  pythonArch: string;
+  exportPythonArch: boolean;
   activateEnvironment: boolean;
   noProject: boolean;
   venvPath: string;
@@ -54,6 +56,9 @@ export function loadInputs(): SetupInputs {
   const version = core.getInput("version");
   const versionFile = getVersionFile(workingDirectory);
   const pythonVersion = getPythonVersion(versionFile);
+  const pythonArchInput = core.getInput("python-arch");
+  const pythonArch = pythonArchInput || process.env.UV_PYTHON_ARCH || "";
+  const exportPythonArch = pythonArchInput !== "";
   const activateEnvironment = core.getBooleanInput("activate-environment");
   const noProject = core.getBooleanInput("no-project");
   const venvPath = getVenvPath(workingDirectory, activateEnvironment);
@@ -94,12 +99,14 @@ export function loadInputs(): SetupInputs {
     checksum,
     downloadFromAstralMirror,
     enableCache,
+    exportPythonArch,
     githubToken,
     ignoreEmptyWorkdir,
     ignoreNothingToCache,
     manifestFile,
     noProject,
     pruneCache,
+    pythonArch,
     pythonDir,
     pythonVersion,
     quiet,

src/utils/python-arch.ts

@@ -0,0 +1,75 @@
+import { execFile } from "node:child_process";
+import { promisify } from "node:util";
+import * as core from "@actions/core";
+import * as log from "./logging";
+
+const execFileAsync = promisify(execFile);
+const PROBE_ARCH = "setup-uv-probe";
+
+export async function setupPythonArch(
+  uvPath: string,
+  pythonArch: string,
+  exportPythonArch: boolean,
+): Promise<void> {
+  if (pythonArch === "") {
+    return;
+  }
+
+  // Older uv releases ignore unknown environment variables. An invalid architecture
+  // confirms that uv recognizes UV_PYTHON_ARCH without finding or downloading Python.
+  const probe = await queryPythonArch(uvPath, PROBE_ARCH);
+  if (probe.exitCode === 0) {
+    throw new Error(
+      "The installed version of uv does not support UV_PYTHON_ARCH. Select a newer uv version or use an architecture-qualified python-version.",
+    );
+  }
+  if (
+    !probe.stderr.includes(
+      `environment variable \`UV_PYTHON_ARCH\` with invalid value \`${PROBE_ARCH}\``,
+    )
+  ) {
+    throw new Error(
+      `Failed to check uv's support for UV_PYTHON_ARCH: ${probe.stderr.trim() || `uv exited with code ${probe.exitCode}`}`,
+    );
+  }
+
+  const selected = await queryPythonArch(uvPath, pythonArch);
+  if (selected.exitCode !== 0) {
+    throw new Error(
+      `Failed to set Python architecture to ${pythonArch}: ${selected.stderr.trim() || `uv exited with code ${selected.exitCode}`}`,
+    );
+  }
+
+  if (exportPythonArch) {
+    core.exportVariable("UV_PYTHON_ARCH", pythonArch);
+    log.info(`Set UV_PYTHON_ARCH to ${pythonArch}`);
+  }
+}
+
+async function queryPythonArch(
+  uvPath: string,
+  pythonArch: string,
+): Promise<{ exitCode: number; stderr: string }> {
+  try {
+    const { stderr } = await execFileAsync(
+      uvPath,
+      ["--no-config", "cache", "dir"],
+      {
+        encoding: "utf8",
+        env: { ...process.env, NO_COLOR: "1", UV_PYTHON_ARCH: pythonArch },
+      },
+    );
+    return { exitCode: 0, stderr };
+  } catch (error) {
+    if (
+      error instanceof Error &&
+      "code" in error &&
+      typeof error.code === "number" &&
+      "stderr" in error &&
+      typeof error.stderr === "string"
+    ) {
+      return { exitCode: error.code, stderr: error.stderr };
+    }
+    throw error;
+  }
+}