V3 backport: Exclude hidden files by default

README.md

@@ -237,6 +237,29 @@ Artifacts are retained for 90 days by default. You can specify a shorter retenti
 
 The retention period must be between 1 and 90 inclusive. For more information see [artifact and log retention policies](https://docs.github.com/en/free-pro-team@latest/actions/reference/usage-limits-billing-and-administration#artifact-and-log-retention-policy).
 
+
+### Hidden Files 
+
+By default, hidden files are ignored by this action to avoid unintentionally uploading sensitive information.
+
+In versions of this action before v3.2.0, these hidden files were included by default.
+
+If you need to upload hidden files, you can use the `include-hidden-files` input.
+
+```yaml
+jobs:
+  upload:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Create a Hidden File
+        run: echo "hello from a hidden file" > .hidden-file.txt
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v3
+        with:
+          path: .hidden-file.txt
+          include-hidden-files: true
+```
+
 ## Where does the upload go?
 
 At the bottom of the workflow summary page, there is a dedicated section for artifacts. Here's a screenshot of something you might see:

__tests__/search.test.ts

@@ -61,6 +61,20 @@ const lonelyFilePath = path.join(
   'lonely-file.txt'
 )
 
+const hiddenFile = path.join(root, '.hidden-file.txt')
+const fileInHiddenFolderPath = path.join(
+  root,
+  '.hidden-folder',
+  'folder-in-hidden-folder',
+  'file.txt'
+)
+const fileInHiddenFolderInFolderA = path.join(
+  root,
+  'folder-a',
+  '.hidden-folder-in-folder-a',
+  'file.txt'
+)
+
 describe('Search', () => {
   beforeAll(async () => {
     // mock all output so that there is less noise when running tests
@@ -92,6 +106,13 @@ describe('Search', () => {
     await fs.mkdir(path.join(root, 'folder-h', 'folder-j', 'folder-k'), {
       recursive: true
     })
+    await fs.mkdir(
+      path.join(root, '.hidden-folder', 'folder-in-hidden-folder'),
+      {recursive: true}
+    )
+    await fs.mkdir(path.join(root, 'folder-a', '.hidden-folder-in-folder-a'), {
+      recursive: true
+    })
 
     await fs.writeFile(searchItem1Path, 'search item1 file')
     await fs.writeFile(searchItem2Path, 'search item2 file')
@@ -110,10 +131,19 @@ describe('Search', () => {
     await fs.writeFile(amazingFileInFolderHPath, 'amazing file')
 
     await fs.writeFile(lonelyFilePath, 'all by itself')
+
+    await fs.writeFile(hiddenFile, 'hidden file')
+    await fs.writeFile(fileInHiddenFolderPath, 'file in hidden directory')
+    await fs.writeFile(fileInHiddenFolderInFolderA, 'file in hidden directory')
     /*
       Directory structure of files that get created:
       root/
+          .hidden-folder/
+            folder-in-hidden-folder/
+              file.txt
           folder-a/
+              .hidden-folder-in-folder-a/
+                file.txt
               folder-b/
                   folder-c/
                       search-item1.txt
@@ -136,6 +166,7 @@ describe('Search', () => {
               folder-j/
                   folder-k/
                       lonely-file.txt
+          .hidden-file.txt
           search-item5.txt
     */
   })
@@ -352,4 +383,24 @@ describe('Search', () => {
     )
     expect(searchResult.filesToUpload.includes(lonelyFilePath)).toEqual(true)
   })
+
+  it('Hidden files ignored by default', async () => {
+    const searchPath = path.join(root, '**/*')
+    const searchResult = await findFilesToUpload(searchPath)
+
+    expect(searchResult.filesToUpload).not.toContain(hiddenFile)
+    expect(searchResult.filesToUpload).not.toContain(fileInHiddenFolderPath)
+    expect(searchResult.filesToUpload).not.toContain(
+      fileInHiddenFolderInFolderA
+    )
+  })
+
+  it('Hidden files included', async () => {
+    const searchPath = path.join(root, '**/*')
+    const searchResult = await findFilesToUpload(searchPath, true)
+
+    expect(searchResult.filesToUpload).toContain(hiddenFile)
+    expect(searchResult.filesToUpload).toContain(fileInHiddenFolderPath)
+    expect(searchResult.filesToUpload).toContain(fileInHiddenFolderInFolderA)
+  })
 })

action.yml

@@ -23,6 +23,11 @@ inputs:
 
       Minimum 1 day.
       Maximum 90 days unless changed from the repository settings page.
+  include-hidden-files:
+    description: >
+      If true, hidden files will be included in the uploaded artifact.
+      If false, hidden files will be excluded from the uploaded artifact.
+    default: 'false'
 runs:
   using: 'node16'
   main: 'dist/index.js'