Apply suggestions from code review

Co-authored-by: Konrad Pabjan <konradpabjan@github.com>

.devcontainer/devcontainer.json

@@ -0,0 +1,6 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/typescript-node
+{
+	"name": "@actions/upload-artifact",
+	"image": "mcr.microsoft.com/devcontainers/typescript-node:0-16"
+}

.eslintrc.json

@@ -4,13 +4,10 @@
     "parserOptions": { "ecmaVersion": 9, "sourceType": "module" },
     "extends": [
       "eslint:recommended",
-      "plugin:@typescript-eslint/eslint-recommended",
-      "plugin:@typescript-eslint/recommended",
       "plugin:import/errors",
       "plugin:import/warnings",
       "plugin:import/typescript",
-      "plugin:prettier/recommended",
-      "prettier/@typescript-eslint"
+      "plugin:prettier/recommended"
     ],
     "rules": {
        "@typescript-eslint/no-empty-function": "off"

.github/workflows/check-dist.yml

@@ -10,9 +10,11 @@ on:
   push:
     branches:
       - main
+    paths-ignore:
+      - '**.md'
   pull_request:
-    branches:
-      - main
+    paths-ignore:
+      - '**.md'
   workflow_dispatch:
 
 jobs:
@@ -20,29 +22,32 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
-      - name: Set Node.js 12.x
-        uses: actions/setup-node@v1
+      - name: Setup Node 20
+        uses: actions/setup-node@v4
         with:
-          node-version: 12.x
+          node-version: 20.x
+          cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
 
-      - name: Move the committed index.js file
-        run: mv dist/index.js /tmp
+      - name: Rebuild the dist/ directory
+        run: npm run build
 
-      - name: Rebuild the index.js file
-        run: npm run release
-
-      - name: Compare the expected and actual index.js files
-        run: git diff --ignore-all-space dist/index.js /tmp/index.js
+      - name: Compare the expected and actual dist/ directories
+        run: |
+          if [ "$(git diff --ignore-space-at-eol dist/ | wc -l)" -gt "0" ]; then
+            echo "Detected uncommitted changes after build.  See status below:"
+            git diff
+            exit 1
+          fi
         id: diff
 
       # If index.js was different than expected, upload the expected version as an artifact
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4-beta
         if: ${{ failure() && steps.diff.conclusion == 'failure' }}
         with:
-          name: index.js
-          path: dist/index.js
+          name: dist
+          path: dist/

.github/workflows/codeql-analysis.yml

@@ -17,11 +17,11 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
+      uses: github/codeql-action/init@v2
       # Override language selection by uncommenting this and choosing your languages
       # with:
       #   languages: go, javascript, csharp, python, cpp, java
@@ -29,7 +29,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v1
+      uses: github/codeql-action/autobuild@v2
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -43,4 +43,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1
+      uses: github/codeql-action/analyze@v2

.github/workflows/licensed.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Check licenses
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: npm ci
       - name: Install licensed
         run: |

.github/workflows/release-new-action-version.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
     - name: Update the ${{ env.TAG_NAME }} tag
       id: update-major-tag
-      uses: actions/publish-action@v0.1.0
+      uses: actions/publish-action@v0.2.1
       with:
         source-tag: ${{ env.TAG_NAME }}
         slack-webhook: ${{ secrets.SLACK_WEBHOOK }}

.github/workflows/test.yml

@@ -1,4 +1,5 @@
 name: Test
+
 on:
   push:
     branches:
@@ -10,7 +11,6 @@ on:
       - '**.md'
 
 jobs:
-
   build:
     name: Build
 
@@ -23,12 +23,13 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
-    - name: Set Node.js 12.x
-      uses: actions/setup-node@v1
+    - name: Setup Node 20
+      uses: actions/setup-node@v4
       with:
-        node-version: 12.x
+        node-version: 20.x
+        cache: 'npm'
 
     - name: Install dependencies
       run: npm ci
@@ -36,62 +37,53 @@ jobs:
     - name: Compile
       run: npm run build
 
-    - name: npm test
-      run: npm test
-
     - name: Lint
       run: npm run lint
 
     - name: Format
       run: npm run format-check
 
+    - name: Test
+      run: npm run test
+
     # Test end-to-end by uploading two artifacts and then downloading them
     - name: Create artifact files
       run: |
         mkdir -p path/to/dir-1
         mkdir -p path/to/dir-2
-        mkdir -p path/to/dir-3    
+        mkdir -p path/to/dir-3
         echo "Lorem ipsum dolor sit amet" > path/to/dir-1/file1.txt
         echo "Hello world from file #2" > path/to/dir-2/file2.txt
-        echo "This is a going to be a test for a large enough file that should get compressed with GZip. The @actions/artifact package uses GZip to upload files. This text should have a compression ratio greater than 100% so it should get uploaded using GZip" > path/to/dir-3/gzip.txt
 
     # Upload a single file artifact
     - name: 'Upload artifact #1'
       uses: ./
       with:
-        name: 'Artifact-A'
+        name: 'Artifact-A-${{ matrix.runs-on }}'
         path: path/to/dir-1/file1.txt
 
-    # Upload using a wildcard pattern, name should default to 'artifact' if not provided
+    # Upload using a wildcard pattern
     - name: 'Upload artifact #2'
       uses: ./
       with:
+        name: 'Artifact-Wildcard-${{ matrix.runs-on }}'
         path: path/**/dir*/
 
-    # Upload a directory that contains a file that will be uploaded with GZip
+    # Upload a multi-path artifact
     - name: 'Upload artifact #3'
       uses: ./
       with:
-        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'
+        name: 'Multi-Path-Artifact-${{ matrix.runs-on }}'
         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
     - name: 'Download artifact #1'
-      uses: actions/download-artifact@v1
+      uses: actions/download-artifact@v4-beta
       with:
-        name: 'Artifact-A'
+        name: 'Artifact-A-${{ matrix.runs-on }}'
         path: some/new/path
 
     - name: 'Verify Artifact #1'
@@ -109,9 +101,9 @@ jobs:
 
     # Download Artifact #2 and verify the correctness of the content
     - name: 'Download artifact #2'
-      uses: actions/download-artifact@v1
+      uses: actions/download-artifact@v4-beta
       with:
-        name: 'artifact'
+        name: 'Artifact-Wildcard-${{ matrix.runs-on }}'
         path: some/other/path
 
     - name: 'Verify Artifact #2'
@@ -127,32 +119,12 @@ jobs:
             Write-Error "File contents of downloaded artifacts are incorrect"
         }
       shell: pwsh
-    
-    # Download Artifact #3 and verify the correctness of the content
-    - name: 'Download artifact #3'
-      uses: actions/download-artifact@v1
-      with:
-        name: 'GZip-Artifact'
-        path: gzip/artifact/path
-
-    # Because a directory was used as input during the upload the parent directories, path/to/dir-3/, should not be included in the uploaded artifact
-    - name: 'Verify Artifact #3'
-      run: |
-        $gzipFile = "gzip/artifact/path/gzip.txt"
-        if(!(Test-Path -path $gzipFile))
-        {
-            Write-Error "Expected file do not exist"
-        }
-        if(!((Get-Content $gzipFile) -ceq "This is a going to be a test for a large enough file that should get compressed with GZip. The @actions/artifact package uses GZip to upload files. This text should have a compression ratio greater than 100% so it should get uploaded using GZip"))
-        {
-            Write-Error "File contents of downloaded artifact is incorrect"
-        }
-      shell: pwsh
 
+    # Download Artifact #4 and verify the correctness of the content
     - name: 'Download artifact #4'
-      uses: actions/download-artifact@v1
+      uses: actions/download-artifact@v4-beta
       with:
-        name: 'Multi-Path-Artifact'
+        name: 'Multi-Path-Artifact-${{ matrix.runs-on }}'
         path: multi/artifact
 
     - name: 'Verify Artifact #4'

.licenses/npm/@actions/artifact.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/artifact"
-version: 0.6.1
+version: 1.1.1
 type: npm
 summary: 
 homepage: 

.licenses/npm/@actions/core.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/core"
-version: 1.2.6
+version: 1.10.0
 type: npm
 summary: Actions core lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/core

.licenses/npm/@actions/glob.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/glob"
-version: 0.1.0
+version: 0.3.0
 type: npm
 summary: Actions glob lib
 homepage: https://github.com/actions/toolkit/tree/master/packages/glob

.licenses/npm/@actions/io.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/io"
-version: 1.0.2
+version: 1.1.2
 type: npm
 summary: Actions io lib
 homepage: https://github.com/actions/toolkit/tree/master/packages/io

README.md

@@ -1,40 +1,112 @@
-# Upload-Artifact v2
+# `@actions/upload-artifact`
 
-This uploads artifacts from your workflow allowing you to share data between jobs and store data once a workflow is complete.
+Upload [Actions Artifacts](https://docs.github.com/en/actions/using-workflows/storing-workflow-data-as-artifacts) from your Workflow Runs. Internally powered by [@actions/artifact](https://github.com/actions/toolkit/tree/main/packages/artifact) package.
 
 See also [download-artifact](https://github.com/actions/download-artifact).
 
-# What's new
+- [`@actions/upload-artifact`](#actionsupload-artifact)
+  - [v4 - What's new](#v4---whats-new)
+    - [Improvements](#improvements)
+    - [Breaking Changes](#breaking-changes)
+  - [Usage](#usage)
+    - [Inputs](#inputs)
+    - [Outputs](#outputs)
+  - [Examples](#examples)
+    - [Upload an Individual File](#upload-an-individual-file)
+    - [Upload an Entire Directory](#upload-an-entire-directory)
+    - [Upload using a Wildcard Pattern](#upload-using-a-wildcard-pattern)
+    - [Upload using Multiple Paths and Exclusions](#upload-using-multiple-paths-and-exclusions)
+    - [Altering compressions level (speed v. size)](#altering-compressions-level-speed-v-size)
+    - [Customization if no files are found](#customization-if-no-files-are-found)
+    - [(Not) Uploading to the same artifact](#not-uploading-to-the-same-artifact)
+    - [Environment Variables and Tilde Expansion](#environment-variables-and-tilde-expansion)
+    - [Retention Period](#retention-period)
+    - [Using Outputs](#using-outputs)
+      - [Example output between steps](#example-output-between-steps)
+      - [Example output between jobs](#example-output-between-jobs)
+  - [Limitations](#limitations)
+    - [Number of Artifacts](#number-of-artifacts)
+    - [Zip archives](#zip-archives)
+    - [Permission Loss](#permission-loss)
+  - [Where does the upload go?](#where-does-the-upload-go)
 
-- Easier upload
-  - 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
-- Port entire action to typescript from a runner plugin so it is easier to collaborate and accept contributions
 
-Refer [here](https://github.com/actions/upload-artifact/tree/releases/v1) for the previous version
+## v4 - What's new
 
-# Usage
+> [!IMPORTANT]
+> upload-artifact@v4+ is not currently supported on GHES yet. If you are on GHES, you must use [v3](https://github.com/actions/upload-artifact/releases/tag/v3).
 
-See [action.yml](action.yml)
+The release of upload-artifact@v4 and download-artifact@v4 are major changes to the backend architecture of Artifacts. They have numerous performance and behavioral improvements.
+
+For more information, see the [`@actions/artifact`](https://github.com/actions/toolkit/tree/main/packages/artifact) documentation.
+
+### Improvements
+
+1. Uploads are significantly faster, upwards of 90% improvement in worst case scenarios.
+2. Once uploaded, an Artifact ID is returned and Artifacts are immediately available in the UI and [REST API](https://docs.github.com/en/rest/actions/artifacts). Previously, you would have to wait for the run to be completed before an ID was available or any APIs could be utilized.
+3. The contents of an Artifact are uploaded together into an _immutable_ archive. They cannot be altered by subsequent jobs. Both of these factors help reduce the possibility of accidentally corrupting Artifact files.
+4. The compression level of an Artifact can be manually tweaked for speed or size reduction.
+
+### Breaking Changes
+
+1. On self hosted runners, additional [firewall rules](https://github.com/actions/toolkit/tree/main/packages/artifact#breaking-changes) may be required.
+2. Uploading to the same named Artifact multiple times.
+
+    Due to how Artifacts are created in this new version, it is no longer possible to upload to the same named Artifact multiple times. You must either split the uploads into multiple Artifacts with different names, or only upload once. Otherwise you _will_ encounter an error.
+
+3. Limit of Artifacts for an individual job. Each job in a workflow run now has a limit of 10 artifacts.
+
+## Usage
+
+### Inputs
+
+```yaml
+- uses: actions/upload-artifact@v4
+  with:
+    # Name of the artifact to upload.
+    # Optional. Default is 'artifact'
+    name:
+
+    # A file, directory or wildcard pattern that describes what to upload
+    # Required.
+    path:
+
+    # The desired behavior if no files are found using the provided path.
+    # Available Options:
+    #   warn: Output a warning but do not fail the action
+    #   error: Fail the action with an error message
+    #   ignore: Do not output any warnings or errors, the action does not fail
+    # Optional. Default is 'warn'
+    if-no-files-found:
+
+    # Duration after which artifact will expire in days. 0 means using default retention.
+    # Minimum 1 day.
+    # Maximum 90 days unless changed from the repository settings page.
+    # Optional. Defaults to repository settings.
+    retention-days:
+
+    # The level of compression for Zlib to be applied to the artifact archive.
+    # The value can range from 0 to 9.
+    # For large files that are not easily compressed, a value of 0 is recommended for significantly faster uploads.
+    # Optional. Default is '6'
+    compression-level:
+```
+
+### Outputs
+
+| Name | Description | Example |
+| - | - | - |
+| `artifact-id` | GitHub ID of an Artifact, can be used by the REST API | `1234` |
+
+## Examples
 
 ### Upload an Individual File
 
 ```yaml
 steps:
-- uses: actions/checkout@v2
-
 - run: mkdir -p path/to/artifact
-
 - run: echo hello > path/to/artifact/world.txt
-
-- uses: actions/upload-artifact@v2
+- uses: actions/upload-artifact@v4
   with:
     name: my-artifact
     path: path/to/artifact/world.txt
@@ -43,7 +115,7 @@ steps:
 ### Upload an Entire Directory
 
 ```yaml
-- uses: actions/upload-artifact@v2
+- uses: actions/upload-artifact@v4
   with:
     name: my-artifact
     path: path/to/artifact/ # or path/to/artifact
@@ -52,7 +124,7 @@ steps:
 ### Upload using a Wildcard Pattern
 
 ```yaml
-- uses: actions/upload-artifact@v2
+- uses: actions/upload-artifact@v4
   with:
     name: my-artifact
     path: path/**/[abc]rtifac?/*
@@ -61,7 +133,7 @@ steps:
 ### Upload using Multiple Paths and Exclusions
 
 ```yaml
-- uses: actions/upload-artifact@v2
+- uses: actions/upload-artifact@v4
   with:
     name: my-artifact
     path: |
@@ -90,91 +162,104 @@ If multiple paths are provided as input, the least common ancestor of all the se
 
 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/main/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.
+### Altering compressions level (speed v. size)
+
+If you are uploading large or easily compressable data to your artifact, you may benefit from tweaking the compression level. By default, the compression level is `6`, the same as GNU Gzip.
+
+The value can range from 0 to 9:
+  - 0: No compression
+  - 1: Best speed
+  - 6: Default compression (same as GNU Gzip)
+  - 9: Best compression
+
+Higher levels will result in better compression, but will take longer to complete.
+For large files that are not easily compressed, a value of `0` is recommended for significantly faster uploads.
+
+For instance, if you are uploading random binary data, you can save a lot of time by opting out of compression completely, since it won't benefit:
+
+```yaml
+- name: Make a 1GB random binary file
+  run: |
+    dd if=/dev/urandom of=my-1gb-file bs=1M count=1000
+- uses: actions/upload-artifact@v4
+  with:
+    name: my-artifact
+    path: my-1gb-file
+    compression-level: 0 # no compression
+```
+
+But, if you are uploading data that is easily compressed (like plaintext, code, etc) you can save space and cost by having a higher compression level. But this will be heavier on the CPU therefore slower to upload:
+
+```yaml
+- name: Make a file with a lot of repeated text
+  run: |
+    for i in {1..100000}; do echo -n 'foobar' >> foobar.txt; done
+- uses: actions/upload-artifact@v4
+  with:
+    name: my-artifact
+    path: foobar.txt
+    compression-level: 9 # maximum compression
+```
 
 ### Customization if no files are found
 
 If a path (or paths), result in no files being found for the artifact, the action will succeed but print out a warning. In certain scenarios it may be desirable to fail the action or suppress the warning. The `if-no-files-found` option allows you to customize the behavior of the action if no files are found:
 
 ```yaml
-- uses: actions/upload-artifact@v2
+- uses: actions/upload-artifact@v4
   with:
     name: my-artifact
     path: path/to/artifact/
     if-no-files-found: error # 'warn' or 'ignore' are also available, defaults to `warn`
 ```
 
-### Conditional Artifact Upload
+### (Not) Uploading to the same artifact
 
-To upload artifacts only when the previous step of a job failed, use [`if: failure()`](https://help.github.com/en/articles/contexts-and-expression-syntax-for-github-actions#job-status-check-functions):
-
-```yaml
-- uses: actions/upload-artifact@v2
-  if: failure()
-  with:
-    name: my-artifact
-    path: path/to/artifact/
-```
-
-### Uploading without an artifact name
-
-You can upload an artifact without specifying a name
-
-```yaml
-- uses: actions/upload-artifact@v2
-  with:
-    path: path/to/artifact/world.txt
-```
-
-If not provided, `artifact` will be used as the default name which will manifest itself in the UI after upload.
-
-### Uploading to the same artifact
-
-With the following example, the available artifact (named `artifact` by default if no name is provided) would contain both `world.txt` (`hello`) and `extra-file.txt` (`howdy`):
+Unlike earlier versions of `upload-artifact`, uploading to the same artifact via multiple jobs is _not_ supported with `v4`.
 
 ```yaml
 - run: echo hi > world.txt
-- uses: actions/upload-artifact@v2
+- uses: actions/upload-artifact@v4
   with:
+    # implicitly named as 'artifact'
     path: world.txt
 
 - run: echo howdy > extra-file.txt
-- uses: actions/upload-artifact@v2
+- uses: actions/upload-artifact@v4
   with:
+    # also implicitly named as 'artifact', will fail here!
     path: extra-file.txt
-
-- run: echo hello > world.txt
-- uses: actions/upload-artifact@v2
-  with:
-    path: world.txt
 ```
 
-> **_Warning:_**  Be careful when uploading to the same artifact via multiple jobs as artifacts may become corrupted
+Artifact names must be unique since each created artifact is idempotent so multiple jobs cannot modify the same artifact.
 
-Each artifact behaves as a file share. Uploading to the same artifact multiple times in the same workflow can overwrite and append already uploaded files:
+In matrix scenarios, be careful to not accidentally upload to the same artifact, or else you will encounter conflict errors. It would be best to name the artifact _with_ a prefix or suffix from the matrix:
 
 ```yaml
+jobs:
+  upload:
+    name: Generate Build Artifacts
+
     strategy:
       matrix:
-          node-version: [8.x, 10.x, 12.x, 13.x]
+        os: [ubuntu-latest, windows-latest]
+        version: [a, b, c]
+
+    runs-on: ${{ matrix.os }}
+
     steps:
-        - name: Create a file
-          run: echo ${{ matrix.node-version }} > my_file.txt
-        - name: Accidentally upload to the same artifact via multiple jobs
-          uses: actions/upload-artifact@v2
-          with:
-              name: my-artifact
-              path: ${{ github.workspace }}
+    - name: Build
+      run: ./some-script --version=${{ matrix.version }} > my-binary
+    - name: Upload
+      uses: actions/upload-artifact@v4
+      with:
+        name: binary-${{ matrix.os }}-${{ matrix.version }}
+        path: my-binary
 ```
 
-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:
+This will result in artifacts like: `binary-ubuntu-latest-a`, `binary-windows-latest-b`, and so on.
 
-```yaml
-          uses: actions/upload-artifact@v2
-          with:
-              name: my-artifact ${{ matrix.node-version }}
-              path: ${{ github.workspace }}
-```
+Previously the behavior _allowed_ for the artifact names to be the same which resulted in unexpected mutations and accidental corruption. Artifacts created by upload-artifact@v4 are immutable.
 
 ### Environment Variables and Tilde Expansion
 
@@ -184,9 +269,9 @@ You can use `~` in the path input as a substitute for `$HOME`. Basic tilde expan
   - run: |
       mkdir -p ~/new/artifact
       echo hello > ~/new/artifact/world.txt
-  - uses: actions/upload-artifact@v2
+  - uses: actions/upload-artifact@v4
     with:
-      name: Artifacts-V2
+      name: Artifacts-V4-beta
       path: ~/new/**/*
 ```
 
@@ -199,7 +284,7 @@ Environment variables along with context expressions can also be used for input.
     - run: |
         mkdir -p ${{ github.workspace }}/artifact
         echo hello > ${{ github.workspace }}/artifact/world.txt
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v4
       with:
         name: ${{ env.name }}-name
         path: ${{ github.workspace }}/artifact/**/*
@@ -209,11 +294,11 @@ For environment variables created in other steps, make sure to use the `env` exp
 
 ```yaml
     steps:
-    - run: | 
+    - run: |
         mkdir testing
         echo "This is a file to upload" > testing/file.txt
         echo "artifactPath=testing/file.txt" >> $GITHUB_ENV
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v4
       with:
         name: artifact
         path: ${{ env.artifactPath }} # this will resolve to testing/file.txt at runtime
@@ -228,7 +313,7 @@ Artifacts are retained for 90 days by default. You can specify a shorter retenti
     run: echo "I won't live long" > my_file.txt
 
   - name: Upload Artifact
-    uses: actions/upload-artifact@v2
+    uses: actions/upload-artifact@v4
     with:
       name: my-artifact
       path: my_file.txt
@@ -237,6 +322,75 @@ 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).
 
+### Using Outputs
+
+If an artifact upload is successful then an `artifact-id` output is available. This ID is a unique identifier that can be used with [Artifact REST APIs](https://docs.github.com/en/rest/actions/artifacts).
+
+#### Example output between steps
+
+```yml
+    - uses: actions/upload-artifact@v4
+      id: artifact-upload-step
+      with:
+        name: my-artifact
+        path: path/to/artifact/content/
+
+    - name: Output artifact ID
+      run:  echo 'Artifact ID is ${{ steps.artifact-upload-step.outputs.artifact-id }}'
+```
+
+#### Example output between jobs
+
+```yml
+jobs:
+  job1:
+    runs-on: ubuntu-latest
+    outputs:
+      output1: ${{ steps.my-artifact.outputs.artifact-id }}
+    steps:
+      - uses: actions/upload-artifact@v4
+        id: artifact-upload-step
+        with:
+          name: my-artifact
+          path: path/to/artifact/content/
+  job2:
+    runs-on: ubuntu-latest
+    needs: job1
+    steps:
+      - env:
+          OUTPUT1: ${{needs.job1.outputs.output1}}
+        run: echo "Artifact ID from previous job is $OUTPUT1"
+```
+
+## Limitations
+
+### Number of Artifacts
+
+Within an individual job, there is a limit of 10 artifacts that can be created for that job.
+
+You may also be limited by Artifacts if you have exceeded your shared storage quota. Storage is calculated every 6-12 hours. See [the documentation](https://docs.github.com/en/billing/managing-billing-for-github-actions/about-billing-for-github-actions#calculating-minute-and-storage-spending) for more info.
+
+### Zip archives
+
+When an Artifact is uploaded, all the files are assembled into an immutable Zip archive. There is currently no way to download artifacts in a format other than a Zip or to download individual artifact contents.
+
+### Permission Loss
+
+File permissions are not maintained during artifact upload. All directories will have `755` and all files will have `644`. For example, if you make a file executable using `chmod` and then upload that file, post-download the file is no longer guaranteed to be set as an executable.
+
+If you must preserve permissions, you can `tar` all of your files together before artifact upload. Post download, the `tar` file will maintain file permissions and case sensitivity.
+
+```yaml
+- name: 'Tar files'
+  run: tar -cvf my_files.tar /path/to/my/directory
+
+- name: 'Upload Artifact'
+  uses: actions/upload-artifact@v4
+  with:
+    name: my-artifact
+    path: my_files.tar
+```
+
 ## 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:
@@ -245,49 +399,4 @@ At the bottom of the workflow summary page, there is a dedicated section for art
 
 There is a trashcan icon that can be used to delete the artifact. This icon will only appear for users who have write permissions to the repository.
 
-The size of the artifact is denoted in bytes. The displayed artifact size denotes the raw uploaded artifact size (the sum of all the individual files uploaded during the workflow run for the artifact), not the compressed size. When you click to download an artifact from the summary page, a compressed zip is created with all the contents of the artifact and the size of the zip that you download may differ significantly from the displayed size. Billing is based on the raw uploaded size and not the size of the zip.
-
-# Limitations
-
-### Zipped Artifact Downloads
-
-During a workflow run, files are uploaded and downloaded individually using the `upload-artifact` and `download-artifact` actions. However, when a workflow run finishes and an artifact is downloaded from either the UI or through the [download api](https://developer.github.com/v3/actions/artifacts/#download-an-artifact), a zip is dynamically created with all the file contents that were uploaded. There is currently no way to download artifacts after a workflow run finishes in a format other than a zip or to download artifact contents individually. One of the consequences of this limitation is that if a zip is uploaded during a workflow run and then downloaded from the UI, there will be a double zip created.
-
-### Permission Loss
-
-:exclamation: File permissions are not maintained during artifact upload :exclamation: For example, if you make a file executable using `chmod` and then upload that file, post-download the file is no longer guaranteed to be set as an executable.
-
-### Case Insensitive Uploads
-
-:exclamation: File uploads are case insensitive :exclamation: If you upload `A.txt` and `a.txt` with the same root path, only a single file will be saved and available during download.
-
-### Maintaining file permissions and case sensitive files
-
-If file permissions and case sensitivity are required, you can `tar` all of your files together before artifact upload. Post download, the `tar` file will maintain file permissions and case sensitivity:
-
-```yaml
-  - name: Tar files
-    run: tar -cvf my_files.tar /path/to/my/directory
-
-  - name: Upload Artifact
-    uses: actions/upload-artifact@v2
-    with:
-      name: my-artifact
-      path: my_files.tar
-```
-
-### Too many uploads resulting in 429 responses
-
-A very minute subset of users who upload a very very large amount of artifacts in a short period of time may see their uploads throttled or fail because of `Request was blocked due to exceeding usage of resource 'DBCPU' in namespace` or `Unable to copy file to server StatusCode=TooManyRequests`.
-
-To reduce the chance of this happening, you can reduce the number of HTTP calls made during artifact upload by zipping or archiving the contents of your artifact before an upload starts. As an example, imagine an artifact with 1000 files (each 10 Kb in size). Without any modification, there would be around 1000 HTTP calls made to upload the artifact. If you zip or archive the artifact beforehand, the number of HTTP calls can be dropped to single digit territory. Measures like this will significantly speed up your upload and prevent uploads from being throttled or in some cases fail.
-
-## Additional Documentation
-
-See [Storing workflow data as artifacts](https://docs.github.com/en/actions/advanced-guides/storing-workflow-data-as-artifacts) for additional examples and tips.
-
-See extra documentation for the [@actions/artifact](https://github.com/actions/toolkit/blob/main/packages/artifact/docs/additional-information.md) package that is used internally regarding certain behaviors and limitations.
-
-# License
-
-The scripts and documentation in this project are released under the [MIT License](LICENSE).
+The size of the artifact is denoted in bytes. The displayed artifact size denotes the size of the zip that `upload-artifact` creates during upload.

action.yml

@@ -1,7 +1,7 @@
 name: 'Upload a Build Artifact'
 description: 'Upload a build artifact that can be used by subsequent workflow steps'
 author: 'GitHub'
-inputs: 
+inputs:
   name:
     description: 'Artifact name'
     default: 'artifact'
@@ -23,6 +23,24 @@ inputs:
 
       Minimum 1 day.
       Maximum 90 days unless changed from the repository settings page.
+  compression-level:
+    description: >
+      The level of compression for Zlib to be applied to the artifact archive.
+      The value can range from 0 to 9:
+      - 0: No compression
+      - 1: Best speed
+      - 6: Default compression (same as GNU Gzip)
+      - 9: Best compression
+      Higher levels will result in better compression, but will take longer to complete.
+      For large files that are not easily compressed, a value of 0 is recommended for significantly faster uploads.
+    default: '6'
+
+outputs:
+  artifact-id:
+    description: >
+      A unique identifier for the artifact that was just uploaded. Empty if artifact upload failed.
+
+      This ID can be used as input to other APIs to download, delete or get more information about an artifact: https://docs.github.com/en/rest/actions/artifacts
 runs:
-  using: 'node12'
+  using: 'node20'
   main: 'dist/index.js'

package.json

@@ -1,11 +1,11 @@
 {
   "name": "upload-artifact",
-  "version": "2.0.1",
-  "description": "Upload a build artifact that can be used by subsequent workflow steps",
+  "version": "4.0.0",
+  "description": "Upload an Actions Artifact in a workflow run",
   "main": "dist/index.js",
   "scripts": {
     "build": "tsc",
-    "release": "ncc build src/upload-artifact.ts && git add -f dist/",
+    "release": "ncc build src/upload-artifact.ts && git add -f dist/index.js",
     "check-all": "concurrently \"npm:format-check\" \"npm:lint\" \"npm:test\" \"npm:build\"",
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts",
@@ -29,25 +29,25 @@
   },
   "homepage": "https://github.com/actions/upload-artifact#readme",
   "dependencies": {
-    "@actions/artifact": "^0.6.1",
-    "@actions/core": "^1.2.6",
-    "@actions/glob": "^0.1.0",
-    "@actions/io": "^1.0.2"
+    "@actions/artifact": "^2.0.0",
+    "@actions/core": "^1.10.0",
+    "@actions/glob": "^0.3.0",
+    "@actions/io": "^1.1.2"
   },
   "devDependencies": {
-    "@types/jest": "^25.2.1",
-    "@types/node": "^13.11.1",
-    "@typescript-eslint/parser": "^2.27.0",
-    "@zeit/ncc": "^0.22.1",
-    "concurrently": "^5.1.0",
-    "eslint": "^7.4.0",
-    "eslint-plugin-github": "^4.1.1",
-    "eslint-plugin-jest": "^23.8.2",
-    "glob": "^7.1.6",
-    "jest": "^27.2.5",
-    "jest-circus": "^27.2.5",
-    "prettier": "^2.0.4",
-    "ts-jest": "^27.0.6",
-    "typescript": "^3.8.3"
+    "@types/jest": "^29.2.5",
+    "@types/node": "^18.11.18",
+    "@typescript-eslint/parser": "^5.48.0",
+    "@vercel/ncc": "^0.36.0",
+    "concurrently": "^7.6.0",
+    "eslint": "^8.31.0",
+    "eslint-plugin-github": "^4.6.0",
+    "eslint-plugin-jest": "^27.2.0",
+    "glob": "^8.0.3",
+    "jest": "^29.3.1",
+    "jest-circus": "^29.3.1",
+    "prettier": "^2.8.1",
+    "ts-jest": "^29.0.3",
+    "typescript": "^4.9.4"
   }
 }

src/constants.ts

@@ -1,8 +1,10 @@
+/* eslint-disable no-unused-vars */
 export enum Inputs {
   Name = 'name',
   Path = 'path',
   IfNoFilesFound = 'if-no-files-found',
-  RetentionDays = 'retention-days'
+  RetentionDays = 'retention-days',
+  CompressionLevel = 'compression-level'
 }
 
 export enum NoFileOptions {

src/input-helper.ts

@@ -36,5 +36,17 @@ export function getInputs(): UploadInputs {
     }
   }
 
+  const compressionLevelStr = core.getInput(Inputs.CompressionLevel)
+  if (compressionLevelStr) {
+    inputs.compressionLevel = parseInt(compressionLevelStr)
+    if (isNaN(inputs.compressionLevel)) {
+      core.setFailed('Invalid compression-level')
+    }
+
+    if (inputs.compressionLevel < 0 || inputs.compressionLevel > 9) {
+      core.setFailed('Invalid compression-level. Valid values are 0-9')
+    }
+  }
+
   return inputs
 }

src/upload-artifact.ts

@@ -1,5 +1,7 @@
-import * as core from '@actions/core'
-import {create, UploadOptions} from '@actions/artifact'
+import * as core from '../node_modules/@actions/core/'
+import artifact, {
+  UploadArtifactOptions
+} from '../node_modules/@actions/artifact/lib/artifact'
 import {findFilesToUpload} from './search'
 import {getInputs} from './input-helper'
 import {NoFileOptions} from './constants'
@@ -37,39 +39,29 @@ async function run(): Promise<void> {
       )
       core.debug(`Root artifact directory is ${searchResult.rootDirectory}`)
 
-      if (searchResult.filesToUpload.length > 10000) {
-        core.warning(
-          `There are over 10,000 files in this artifact, consider creating an archive before upload to improve the upload performance.`
-        )
-      }
-
-      const artifactClient = create()
-      const options: UploadOptions = {
-        continueOnError: false
-      }
+      const options: UploadArtifactOptions = {}
       if (inputs.retentionDays) {
         options.retentionDays = inputs.retentionDays
       }
 
-      const uploadResponse = await artifactClient.uploadArtifact(
+      if (typeof inputs.compressionLevel !== 'undefined') {
+        options.compressionLevel = inputs.compressionLevel
+      }
+
+      const uploadResponse = await artifact.uploadArtifact(
         inputs.artifactName,
         searchResult.filesToUpload,
         searchResult.rootDirectory,
         options
       )
 
-      if (uploadResponse.failedItems.length > 0) {
-        core.setFailed(
-          `An error was encountered when uploading ${uploadResponse.artifactName}. There were ${uploadResponse.failedItems.length} items that failed to upload.`
-        )
-      } else {
-        core.info(
-          `Artifact ${uploadResponse.artifactName} has been successfully uploaded!`
-        )
-      }
+      core.info(
+        `Artifact ${inputs.artifactName} has been successfully uploaded! Final size is ${uploadResponse.size} bytes. Artifact ID is ${uploadResponse.id}`
+      )
+      core.setOutput('artifact-id', uploadResponse.id)
     }
-  } catch (err) {
-    core.setFailed(err.message)
+  } catch (error) {
+    core.setFailed((error as Error).message)
   }
 }
 

src/upload-inputs.ts

@@ -20,4 +20,9 @@ export interface UploadInputs {
    * Duration after which artifact will expire in days
    */
   retentionDays: number
+
+  /**
+   * The level of compression for Zlib to be applied to the artifact archive.
+   */
+  compressionLevel?: number
 }