Warn when the workdir is empty

README.md

@@ -279,6 +279,20 @@ If you want to ignore this, set the `ignore-nothing-to-cache` input to `true`.
     ignore-nothing-to-cache: true
 ```
 
+### Ignore empty workdir
+
+By default, the action will warn if the workdir is empty, because this is usually the case when
+`actions/checkout` is configured to run after `setup-uv`, which is not supported.
+
+If you want to ignore this, set the `ignore-empty-workdir` input to `true`.
+
+```yaml
+- name: Ignore empty workdir
+  uses: astral-sh/setup-uv@v5
+  with:
+    ignore-empty-workdir: true
+```
+
 ### GitHub authentication token
 
 This action uses the GitHub API to fetch the uv release artifacts. To avoid hitting the GitHub API
@@ -447,6 +461,13 @@ The reason for the warning is, that we have to way to know if this is the first
 cache key or the user accidentally misconfigured the [cache-dependency-glob](#cache-dependency-glob)
 or [cache-suffix](#enable-caching) and the cache never gets used.
 
+### Do I have to run `actions/checkout` before or after `setup-uv`?
+
+Some workflows need uv but do not need to access the repository content.
+
+But **if** you need to access the repository content, you have run `actions/checkout` before running `setup-uv`.
+Running `actions/checkout` after `setup-uv` **is not supported**.
+
 ## Acknowledgements
 
 `setup-uv` was initially written and published by [Kevin Stillhammer](https://github.com/eifinger)

action.yml

@@ -45,6 +45,9 @@ inputs:
   ignore-nothing-to-cache:
     description: "Ignore when nothing is found to cache."
     default: "false"
+  ignore-empty-workdir:
+    description: "Ignore when the working directory is empty."
+    default: "false"
   tool-dir:
     description: "Custom path to set UV_TOOL_DIR to."
     required: false

dist/save-cache/index.js

@@ -88914,7 +88914,7 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.githubToken = exports.toolDir = exports.toolBinDir = exports.ignoreNothingToCache = exports.pruneCache = exports.cacheDependencyGlob = exports.cacheLocalPath = exports.cacheSuffix = exports.enableCache = exports.checkSum = exports.pythonVersion = exports.uvFile = exports.pyProjectFile = exports.version = void 0;
+exports.githubToken = exports.toolDir = exports.toolBinDir = exports.ignoreEmptyWorkdir = exports.ignoreNothingToCache = exports.pruneCache = exports.cacheDependencyGlob = exports.cacheLocalPath = exports.cacheSuffix = exports.enableCache = exports.checkSum = exports.pythonVersion = exports.uvFile = exports.pyProjectFile = exports.version = void 0;
 const core = __importStar(__nccwpck_require__(7484));
 const node_path_1 = __importDefault(__nccwpck_require__(6760));
 exports.version = core.getInput("version");
@@ -88928,6 +88928,7 @@ exports.cacheLocalPath = getCacheLocalPath();
 exports.cacheDependencyGlob = core.getInput("cache-dependency-glob");
 exports.pruneCache = core.getInput("prune-cache") === "true";
 exports.ignoreNothingToCache = core.getInput("ignore-nothing-to-cache") === "true";
+exports.ignoreEmptyWorkdir = core.getInput("ignore-empty-workdir") === "true";
 exports.toolBinDir = getToolBinDir();
 exports.toolDir = getToolDir();
 exports.githubToken = core.getInput("github-token");

dist/setup/index.js

@@ -119746,6 +119746,7 @@ const exec = __importStar(__nccwpck_require__(5236));
 const node_fs_1 = __importDefault(__nccwpck_require__(3024));
 const pyproject_1 = __nccwpck_require__(3929);
 async function run() {
+    detectEmptyWorkdir();
     const platform = await (0, platforms_1.getPlatform)();
     const arch = (0, platforms_1.getArch)();
     try {
@@ -119773,6 +119774,16 @@ async function run() {
         core.setFailed(err.message);
     }
 }
+function detectEmptyWorkdir() {
+    if (node_fs_1.default.readdirSync(".").length === 0) {
+        if (inputs_1.ignoreEmptyWorkdir) {
+            core.info("Empty workdir detected. Ignoring because ignore-empty-workdir is enabled");
+        }
+        else {
+            core.warning("Empty workdir detected. This may cause unexpected behavior. You can enable ignore-empty-workdir to mute this warning.");
+        }
+    }
+}
 async function setupUv(platform, arch, checkSum, githubToken) {
     const resolvedVersion = await determineVersion();
     const toolCacheResult = (0, download_version_1.tryGetFromToolCache)(arch, resolvedVersion);
@@ -119927,7 +119938,7 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.githubToken = exports.toolDir = exports.toolBinDir = exports.ignoreNothingToCache = exports.pruneCache = exports.cacheDependencyGlob = exports.cacheLocalPath = exports.cacheSuffix = exports.enableCache = exports.checkSum = exports.pythonVersion = exports.uvFile = exports.pyProjectFile = exports.version = void 0;
+exports.githubToken = exports.toolDir = exports.toolBinDir = exports.ignoreEmptyWorkdir = exports.ignoreNothingToCache = exports.pruneCache = exports.cacheDependencyGlob = exports.cacheLocalPath = exports.cacheSuffix = exports.enableCache = exports.checkSum = exports.pythonVersion = exports.uvFile = exports.pyProjectFile = exports.version = void 0;
 const core = __importStar(__nccwpck_require__(7484));
 const node_path_1 = __importDefault(__nccwpck_require__(6760));
 exports.version = core.getInput("version");
@@ -119941,6 +119952,7 @@ exports.cacheLocalPath = getCacheLocalPath();
 exports.cacheDependencyGlob = core.getInput("cache-dependency-glob");
 exports.pruneCache = core.getInput("prune-cache") === "true";
 exports.ignoreNothingToCache = core.getInput("ignore-nothing-to-cache") === "true";
+exports.ignoreEmptyWorkdir = core.getInput("ignore-empty-workdir") === "true";
 exports.toolBinDir = getToolBinDir();
 exports.toolDir = getToolDir();
 exports.githubToken = core.getInput("github-token");

src/setup-uv.ts

@@ -16,6 +16,7 @@ import {
 import {
   cacheLocalPath,
   checkSum,
+  ignoreEmptyWorkdir,
   enableCache,
   githubToken,
   pyProjectFile,
@@ -30,6 +31,7 @@ import fs from "node:fs";
 import { getUvVersionFromConfigFile } from "./utils/pyproject";
 
 async function run(): Promise<void> {
+  detectEmptyWorkdir();
   const platform = await getPlatform();
   const arch = getArch();
 
@@ -61,6 +63,20 @@ async function run(): Promise<void> {
   }
 }
 
+function detectEmptyWorkdir(): void {
+  if (fs.readdirSync(".").length === 0) {
+    if (ignoreEmptyWorkdir) {
+      core.info(
+        "Empty workdir detected. Ignoring because ignore-empty-workdir is enabled",
+      );
+    } else {
+      core.warning(
+        "Empty workdir detected. This may cause unexpected behavior. You can enable ignore-empty-workdir to mute this warning.",
+      );
+    }
+  }
+}
+
 async function setupUv(
   platform: Platform,
   arch: Architecture,

src/utils/inputs.ts

@@ -13,6 +13,8 @@ export const cacheDependencyGlob = core.getInput("cache-dependency-glob");
 export const pruneCache = core.getInput("prune-cache") === "true";
 export const ignoreNothingToCache =
   core.getInput("ignore-nothing-to-cache") === "true";
+export const ignoreEmptyWorkdir =
+  core.getInput("ignore-empty-workdir") === "true";
 export const toolBinDir = getToolBinDir();
 export const toolDir = getToolDir();
 export const githubToken = core.getInput("github-token");