.github/workflows/test.yml

@@ -75,6 +75,16 @@ jobs:
         name: 'GZip-Artifact'
         path: path/to/dir-3/
 
+    # Upload a directory that contains a file that will be uploaded with GZip
+    - name: 'Upload artifact #4'
+      uses: ./
+      with:
+        name: 'Multi-Path-Artifact'
+        path: |
+          path/to/dir-1/*
+          path/to/dir-[23]/*
+          !path/to/dir-3/*.txt
+
     # Verify artifacts. Switch to download-artifact@v2 once it's out of preview
 
     # Download Artifact #1 and verify the correctness of the content
@@ -138,3 +148,23 @@ jobs:
             Write-Error "File contents of downloaded artifact is incorrect"
         }
       shell: pwsh
+
+    - name: 'Download artifact #4'
+      uses: actions/download-artifact@v1
+      with:
+        name: 'Multi-Path-Artifact'
+        path: multi/artifact
+
+    - name: 'Verify Artifact #4'
+      run: |
+        $file1 = "multi/artifact/dir-1/file1.txt"
+        $file2 = "multi/artifact/dir-2/file2.txt"
+        if(!(Test-Path -path $file1) -or !(Test-Path -path $file2))
+        {
+            Write-Error "Expected files do not exist"
+        }
+        if(!((Get-Content $file1) -ceq "Lorem ipsum dolor sit amet") -or !((Get-Content $file2) -ceq "Hello world from file #2"))
+        {
+            Write-Error "File contents of downloaded artifacts are incorrect"
+        }
+      shell: pwsh

README.md

@@ -10,6 +10,9 @@ See also [download-artifact](https://github.com/actions/download-artifact).
   - Specify a wildcard pattern
   - Specify an individual file
   - Specify a directory (previously you were limited to only this option)
+  - Multi path upload
+    - Use a combination of individual files, wildcards or directories
+    - Support for excluding certain files
 - Upload an artifact without providing a name
 - Fix for artifact uploads sometimes not working with containers
 - Proxy support out of the box
@@ -45,19 +48,45 @@ steps:
     path: path/to/artifact/ # or path/to/artifact
 ```
 
-### Upload using a Wildcard Pattern:
+### Upload using a Wildcard Pattern
 ```yaml
 - uses: actions/upload-artifact@v2
   with:
     name: my-artifact
     path: path/**/[abc]rtifac?/*
 ```
 
+### Upload using Multiple Paths and Exclusions
+```yaml
+- uses: actions/upload-artifact@v2
+  with:
+    name: my-artifact
+    path: |
+      path/output/bin/
+      path/output/test-results
+      !path/**/*.tmp
+```
+
 For supported wildcards along with behavior and documentation, see [@actions/glob](https://github.com/actions/toolkit/tree/master/packages/glob) which is used internally to search for files.
 
+If a wildcard pattern is used, the path hierarchy will be preserved after the first wildcard pattern. 
+
+```
+    path/to/*/directory/foo?.txt =>
+        ∟ path/to/some/directory/foo1.txt
+        ∟ path/to/some/directory/foo2.txt
+        ∟ path/to/other/directory/foo1.txt
+
+    would be flattened and uploaded as =>
+        ∟ some/directory/foo1.txt
+        ∟ some/directory/foo2.txt
+        ∟ other/directory/foo1.txt
+```
+If multiple paths are provided as input, the least common ancestor of all the search paths will be used as the root directory of the artifact. Exclude paths do not effect the directory structure.
+
 Relative and absolute file paths are both allowed. Relative paths are rooted against the current working directory. Paths that begin with a wildcard character should be quoted to avoid being interpreted as YAML aliases.
 
-The [@actions/artifact](https://github.com/actions/toolkit/tree/master/packages/artifact) package is also used internally to handle most of the logic around uploading an artifact. There is extra documentation around upload limitations and behavior in the toolkit repo that is worth checking out.
+The [@actions/artifact](https://github.com/actions/toolkit/tree/master/packages/artifact) package is used internally to handle most of the logic around uploading an artifact. There is extra documentation around upload limitations and behavior in the toolkit repo that is worth checking out.
 
 ### Conditional Artifact Upload
 
@@ -104,6 +133,31 @@ Each artifact behaves as a file share. Uploading to the same artifact multiple t
 ```
 With the following example, the available artifact (named `artifact` which is the default if no name is provided) would contain both `world.txt` (`hello`) and `extra-file.txt` (`howdy`).
 
+> **_Warning:_**  Be careful when uploading to the same artifact via multiple jobs as artifacts may become corrupted 
+
+```yaml
+    strategy:
+      matrix:
+          node-version: [8.x, 10.x, 12.x, 13.x]
+    steps:
+        - name: 'Create a file'
+          run: echo ${{ matrix.node-version }} > my_file.txt
+        - name: 'Accidently upload to the same artifact via multiple jobs'
+          uses: 'actions/upload-artifact@v2'
+          with:
+              name: my-artifact
+              path: ${{ github.workspace }}
+```
+
+In the above example, four jobs will upload four different files to the same artifact but there will only be one file available when `my-artifact` is downloaded. Each job overwrites what was previously uploaded. To ensure that jobs don't overwrite existing artifacts, use a different name per job.
+
+```yaml
+          uses: 'actions/upload-artifact@v2'
+          with:
+              name: my-artifact ${{ matrix.node-version }}
+              path: ${{ github.workspace }}
+```
+
 ### Environment Variables and Tilde Expansion
 
 You can use `~` in the path input as a substitute for `$HOME`. Basic tilde expansion is supported.

__tests__/search.test.ts

@@ -231,7 +231,7 @@ describe('Search', () => {
 
     expect(searchResult.filesToUpload.includes(searchItem1Path)).toEqual(true)
     expect(searchResult.filesToUpload.includes(searchItem2Path)).toEqual(true)
-    expect(searchResult.filesToUpload.includes(searchItem2Path)).toEqual(true)
+    expect(searchResult.filesToUpload.includes(searchItem3Path)).toEqual(true)
     expect(searchResult.filesToUpload.includes(searchItem4Path)).toEqual(true)
     expect(searchResult.filesToUpload.includes(searchItem5Path)).toEqual(true)
     expect(searchResult.filesToUpload.includes(extraSearchItem1Path)).toEqual(
@@ -265,7 +265,7 @@ describe('Search', () => {
 
     expect(searchResult.filesToUpload.includes(searchItem1Path)).toEqual(true)
     expect(searchResult.filesToUpload.includes(searchItem2Path)).toEqual(true)
-    expect(searchResult.filesToUpload.includes(searchItem2Path)).toEqual(true)
+    expect(searchResult.filesToUpload.includes(searchItem3Path)).toEqual(true)
     expect(searchResult.filesToUpload.includes(searchItem4Path)).toEqual(true)
     expect(searchResult.filesToUpload.includes(searchItem5Path)).toEqual(true)
     expect(searchResult.filesToUpload.includes(extraSearchItem1Path)).toEqual(
@@ -286,4 +286,70 @@ describe('Search', () => {
 
     expect(searchResult.rootDirectory).toEqual(root)
   })
+
+  it('Multi path search - root directory', async () => {
+    const searchPath1 = path.join(root, 'folder-a')
+    const searchPath2 = path.join(root, 'folder-d')
+
+    const searchPaths = searchPath1 + '\n' + searchPath2
+    const searchResult = await findFilesToUpload(searchPaths)
+
+    expect(searchResult.rootDirectory).toEqual(root)
+    expect(searchResult.filesToUpload.length).toEqual(7)
+    expect(searchResult.filesToUpload.includes(searchItem1Path)).toEqual(true)
+    expect(searchResult.filesToUpload.includes(searchItem2Path)).toEqual(true)
+    expect(searchResult.filesToUpload.includes(searchItem3Path)).toEqual(true)
+    expect(searchResult.filesToUpload.includes(searchItem4Path)).toEqual(true)
+    expect(searchResult.filesToUpload.includes(extraSearchItem1Path)).toEqual(
+      true
+    )
+    expect(searchResult.filesToUpload.includes(extraSearchItem2Path)).toEqual(
+      true
+    )
+    expect(searchResult.filesToUpload.includes(extraFileInFolderCPath)).toEqual(
+      true
+    )
+  })
+
+  it('Multi path search - with exclude character', async () => {
+    const searchPath1 = path.join(root, 'folder-a')
+    const searchPath2 = path.join(root, 'folder-d')
+    const searchPath3 = path.join(root, 'folder-a', 'folder-b', '**/extra*.txt')
+
+    // negating the third search path
+    const searchPaths = searchPath1 + '\n' + searchPath2 + '\n!' + searchPath3
+    const searchResult = await findFilesToUpload(searchPaths)
+
+    expect(searchResult.rootDirectory).toEqual(root)
+    expect(searchResult.filesToUpload.length).toEqual(5)
+    expect(searchResult.filesToUpload.includes(searchItem1Path)).toEqual(true)
+    expect(searchResult.filesToUpload.includes(searchItem2Path)).toEqual(true)
+    expect(searchResult.filesToUpload.includes(searchItem3Path)).toEqual(true)
+    expect(searchResult.filesToUpload.includes(searchItem4Path)).toEqual(true)
+    expect(searchResult.filesToUpload.includes(extraSearchItem2Path)).toEqual(
+      true
+    )
+  })
+
+  it('Multi path search - non root directory', async () => {
+    const searchPath1 = path.join(root, 'folder-h', 'folder-i')
+    const searchPath2 = path.join(root, 'folder-h', 'folder-j', 'folder-k')
+    const searchPath3 = amazingFileInFolderHPath
+
+    const searchPaths = [searchPath1, searchPath2, searchPath3].join('\n')
+    const searchResult = await findFilesToUpload(searchPaths)
+
+    expect(searchResult.rootDirectory).toEqual(path.join(root, 'folder-h'))
+    expect(searchResult.filesToUpload.length).toEqual(4)
+    expect(
+      searchResult.filesToUpload.includes(amazingFileInFolderHPath)
+    ).toEqual(true)
+    expect(searchResult.filesToUpload.includes(extraSearchItem4Path)).toEqual(
+      true
+    )
+    expect(searchResult.filesToUpload.includes(extraSearchItem5Path)).toEqual(
+      true
+    )
+    expect(searchResult.filesToUpload.includes(lonelyFilePath)).toEqual(true)
+  })
 })

dist/index.js

@@ -6221,6 +6221,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
 };
 Object.defineProperty(exports, "__esModule", { value: true });
 const glob = __importStar(__webpack_require__(281));
+const path = __importStar(__webpack_require__(622));
 const core_1 = __webpack_require__(470);
 const fs_1 = __webpack_require__(747);
 const path_1 = __webpack_require__(622);
@@ -6231,6 +6232,57 @@ function getDefaultGlobOptions() {
         omitBrokenSymbolicLinks: true
     };
 }
+/**
+ * If multiple paths are specific, the least common ancestor (LCA) of the search paths is used as
+ * the delimiter to control the directory structure for the artifact. This function returns the LCA
+ * when given an array of search paths
+ *
+ * Example 1: The patterns `/foo/` and `/bar/` returns `/`
+ *
+ * Example 2: The patterns `~/foo/bar/*` and `~/foo/voo/two/*` and `~/foo/mo/` returns `~/foo`
+ */
+function getMultiPathLCA(searchPaths) {
+    if (searchPaths.length < 2) {
+        throw new Error('At least two search paths must be provided');
+    }
+    const commonPaths = new Array();
+    const splitPaths = new Array();
+    let smallestPathLength = Number.MAX_SAFE_INTEGER;
+    // split each of the search paths using the platform specific separator
+    for (const searchPath of searchPaths) {
+        core_1.debug(`Using search path ${searchPath}`);
+        const splitSearchPath = path.normalize(searchPath).split(path.sep);
+        // keep track of the smallest path length so that we don't accidentally later go out of bounds
+        smallestPathLength = Math.min(smallestPathLength, splitSearchPath.length);
+        splitPaths.push(splitSearchPath);
+    }
+    // on Unix-like file systems, the file separator exists at the beginning of the file path, make sure to preserve it
+    if (searchPaths[0].startsWith(path.sep)) {
+        commonPaths.push(path.sep);
+    }
+    let splitIndex = 0;
+    // function to check if the paths are the same at a specific index
+    function isPathTheSame() {
+        const compare = splitPaths[0][splitIndex];
+        for (let i = 1; i < splitPaths.length; i++) {
+            if (compare !== splitPaths[i][splitIndex]) {
+                // a non-common index has been reached
+                return false;
+            }
+        }
+        return true;
+    }
+    // Loop over all the search paths until there is a non-common ancestor or we go out of bounds
+    while (splitIndex < smallestPathLength) {
+        if (!isPathTheSame()) {
+            break;
+        }
+        // if all are the same, add to the end result & increment the index
+        commonPaths.push(splitPaths[0][splitIndex]);
+        splitIndex++;
+    }
+    return path.join(...commonPaths);
+}
 function findFilesToUpload(searchPath, globOptions) {
     return __awaiter(this, void 0, void 0, function* () {
         const searchResults = [];
@@ -6249,13 +6301,16 @@ function findFilesToUpload(searchPath, globOptions) {
                 core_1.debug(`Removing ${searchResult} from rawSearchResults because it is a directory`);
             }
         }
-        /*
-          Only a single search pattern is being included so only 1 searchResult is expected. In the future if multiple search patterns are
-          simultaneously supported this will change
-        */
+        // Calculate the root directory for the artifact using the search paths that were utilized
         const searchPaths = globber.getSearchPaths();
         if (searchPaths.length > 1) {
-            throw new Error('Only 1 search path should be returned');
+            core_1.info(`Multiple search paths detected. Calculating the least common ancestor of all paths`);
+            const lcaSearchPath = getMultiPathLCA(searchPaths);
+            core_1.info(`The least common ancestor is ${lcaSearchPath}. This will be the root directory of the artifact`);
+            return {
+                filesToUpload: searchResults,
+                rootDirectory: lcaSearchPath
+            };
         }
         /*
           Special case for a single file artifact that is uploaded without a directory or wildcard pattern. The directory structure is