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			248 lines
		
	
	
		
			7.4 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			248 lines
		
	
	
		
			7.4 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
# Migration
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- [Migration](#migration)
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  - [Multiple uploads to the same named Artifact](#multiple-uploads-to-the-same-named-artifact)
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  - [Overwriting an Artifact](#overwriting-an-artifact)
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  - [Merging multiple artifacts](#merging-multiple-artifacts)
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  - [Hidden files](#hidden-files)
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Several behavioral differences exist between Artifact actions `v3` and below vs `v4`. This document outlines common scenarios in `v3`, and how they would be handled in `v4`.
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## Multiple uploads to the same named Artifact
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In `v3`, Artifacts are _mutable_ so it's possible to write workflow scenarios where multiple jobs upload to the same Artifact like so:
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```yaml
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jobs:
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  upload:
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    strategy:
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      matrix:
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        runs-on: [ubuntu-latest, macos-latest, windows-latest]
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    runs-on: ${{ matrix.runs-on }}
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    steps:
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      - name: Create a File
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        run: echo "hello from ${{ matrix.runs-on }}" > file-${{ matrix.runs-on }}.txt
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      - name: Upload Artifact
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        uses: actions/upload-artifact@v3
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        with:
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          name: my-artifact # NOTE: same artifact name
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          path: file-${{ matrix.runs-on }}.txt
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  download:
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    needs: upload
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    runs-on: ubuntu-latest
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    steps:
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      - name: Download All Artifacts
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        uses: actions/download-artifact@v3
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        with:
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          name: my-artifact
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          path: my-artifact
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      - run: ls -R my-artifact
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```
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This results in a directory like so:
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```
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my-artifact/
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  file-macos-latest.txt
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  file-ubuntu-latest.txt
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  file-windows-latest.txt
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```
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In v4, Artifacts are immutable (unless deleted). So you must change each of the uploaded Artifacts to have a different name and filter the downloads by name to achieve the same effect:
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```diff
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jobs:
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  upload:
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    strategy:
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      matrix:
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        runs-on: [ubuntu-latest, macos-latest, windows-latest]
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    runs-on: ${{ matrix.runs-on }}
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    steps:
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    - name: Create a File
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      run: echo "hello from ${{ matrix.runs-on }}" > file-${{ matrix.runs-on }}.txt
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    - name: Upload Artifact
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-     uses: actions/upload-artifact@v3
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+     uses: actions/upload-artifact@v4
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      with:
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-       name: my-artifact
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+       name: my-artifact-${{ matrix.runs-on }}
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        path: file-${{ matrix.runs-on }}.txt
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  download:
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    needs: upload
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    runs-on: ubuntu-latest
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    steps:
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    - name: Download All Artifacts
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-     uses: actions/download-artifact@v3
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+     uses: actions/download-artifact@v4
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      with:
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-       name: my-artifact
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        path: my-artifact
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+       pattern: my-artifact-*
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+       merge-multiple: true
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    - run: ls -R my-artifact
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```
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In `v4`, the new `pattern:` input will filter the downloaded Artifacts to match the name specified. The new `merge-multiple:` input will support downloading multiple Artifacts to the same directory. If the files within the Artifacts have the same name, the last writer wins.
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## Overwriting an Artifact
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In `v3`, the contents of an Artifact were mutable so something like the following was possible:
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```yaml
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jobs:
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  upload:
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    runs-on: ubuntu-latest
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    steps:
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      - name: Create a file
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        run: echo "hello world" > my-file.txt
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      - name: Upload Artifact
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        uses: actions/upload-artifact@v3
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        with:
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          name: my-artifact # NOTE: same artifact name
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          path: my-file.txt
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  upload-again:
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    needs: upload
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    runs-on: ubuntu-latest
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    steps:
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      - name: Create a different file
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        run: echo "goodbye world" > my-file.txt
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      - name: Upload Artifact
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        uses: actions/upload-artifact@v3
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        with:
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          name: my-artifact # NOTE: same artifact name
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          path: my-file.txt
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```
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The resulting `my-file.txt` in `my-artifact` will have "goodbye world" as the content.
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In `v4`, Artifacts are immutable unless deleted. To achieve this same behavior, you can use `overwrite: true` to delete the Artifact before a new one is created:
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```diff
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jobs:
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  upload:
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    runs-on: ubuntu-latest
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    steps:
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      - name: Create a file
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        run: echo "hello world" > my-file.txt
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      - name: Upload Artifact
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-       uses: actions/upload-artifact@v3
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+       uses: actions/upload-artifact@v4
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        with:
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          name: my-artifact # NOTE: same artifact name
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          path: my-file.txt
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  upload-again:
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    needs: upload
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    runs-on: ubuntu-latest
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    steps:
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      - name: Create a different file
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        run: echo "goodbye world" > my-file.txt
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      - name: Upload Artifact
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-       uses: actions/upload-artifact@v3
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+       uses: actions/upload-artifact@v4
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        with:
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          name: my-artifact # NOTE: same artifact name
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          path: my-file.txt
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+         overwrite: true
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```
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Note that this will create an _entirely_ new Artifact, with a different ID from the previous.
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## Merging multiple artifacts
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In `v3`, multiple uploads from multiple jobs could be done to the same Artifact. This would result in a single archive, which could be useful for sending to upstream systems outside of Actions via API or UI downloads.
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```yaml
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jobs:
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  upload:
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    strategy:
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      matrix:
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        runs-on: [ubuntu-latest, macos-latest, windows-latest]
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    runs-on: ${{ matrix.runs-on }}
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    steps:
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      - name: Create a File
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        run: echo "hello from ${{ matrix.runs-on }}" > file-${{ matrix.runs-on }}.txt
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      - name: Upload Artifact
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        uses: actions/upload-artifact@v3
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        with:
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          name: all-my-files # NOTE: same artifact name
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          path: file-${{ matrix.runs-on }}.txt
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```
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The single `all-my-files` artifact would contain the following:
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```
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.
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  ∟ file-ubuntu-latest.txt
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  ∟ file-macos-latest.txt
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  ∟ file-windows-latest.txt
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```
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To achieve the same in `v4` you can change it like so:
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```diff
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jobs:
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  upload:
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    strategy:
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      matrix:
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        runs-on: [ubuntu-latest, macos-latest, windows-latest]
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    runs-on: ${{ matrix.runs-on }}
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    steps:
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      - name: Create a File
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        run: echo "hello from ${{ matrix.runs-on }}" > file-${{ matrix.runs-on }}.txt
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      - name: Upload Artifact
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-       uses: actions/upload-artifact@v3
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+       uses: actions/upload-artifact@v4
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        with:
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-         name: all-my-files
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+         name: my-artifact-${{ matrix.runs-on }}
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          path: file-${{ matrix.runs-on }}.txt
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+  merge:
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+    runs-on: ubuntu-latest
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+    needs: upload
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+    steps:
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+      - name: Merge Artifacts
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+        uses: actions/upload-artifact/merge@v4
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+        with:
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+          name: all-my-files
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+          pattern: my-artifact-*
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```
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Note that this will download all artifacts to a temporary directory and reupload them as a single artifact. For more information on inputs and other use cases for `actions/upload-artifact/merge@v4`, see [the action documentation](../merge/README.md).
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## Hidden Files
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By default, hidden files are ignored by this action to avoid unintentionally uploading sensitive
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information.
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In versions of this action before v4.4.0, these hidden files were included by default.
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If you need to upload hidden files, you can use the `include-hidden-files` input.
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```yaml
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jobs:
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  upload:
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    runs-on: ubuntu-latest
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    steps:
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      - name: Create a Hidden File
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        run: echo "hello from a hidden file" > .hidden-file.txt
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      - name: Upload Artifact
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        uses: actions/upload-artifact@v3
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        with:
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          path: .hidden-file.txt
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```
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```diff
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jobs:
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  upload:
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    runs-on: ubuntu-latest
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    steps:
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      - name: Create a Hidden File
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        run: echo "hello from a hidden file" > .hidden-file.txt
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      - name: Upload Artifact
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-       uses: actions/upload-artifact@v3
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+       uses: actions/upload-artifact@v4
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        with:
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          path: .hidden-file.txt
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+         include-hidden-files: true
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``` |