download-artifact/README.md
Konrad Pabjan 80d2d4023c
Document Artifact Limitations + Bump actions/artifact package version (#51)
* Document Artifact Limitations

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# Download-Artifact v2
This downloads artifacts from your build
See also [upload-artifact](https://github.com/actions/upload-artifact).
# What's new
- Download all artifacts at once
- Output parameter for the download path
- Port entire action to typescript from a runner plugin so it is easier to collaborate and accept contributions
Refer [here](https://github.com/actions/download-artifact/tree/v1) for the previous version
# Usage
See [action.yml](action.yml)
# Download a Single Artifact
Basic (download to the current working directory):
```yaml
steps:
- uses: actions/checkout@v2
- uses: actions/download-artifact@v2
with:
name: my-artifact
- name: Display structure of downloaded files
run: ls -R
```
Download to a specific directory:
```yaml
steps:
- uses: actions/checkout@v2
- uses: actions/download-artifact@v2
with:
name: my-artifact
path: path/to/artifact
- name: Display structure of downloaded files
run: ls -R
working-directory: path/to/artifact
```
Basic tilde expansion is supported for the `path` input:
```yaml
- uses: actions/download-artifact@v2
with:
name: my-artifact
path: ~/download/path
```
## Compatibility between `v1` and `v2`
When using `download-artifact@v1`, a directory denoted by the name of the artifact would be created if the `path` input was not provided. All of the contents would be downloaded to this directory.
```
current/working/directory/
my-artifact/
... contents of my-artifact
```
With `v2`, there is no longer an extra directory that is created if the `path` input is not provided. All the contents are downloaded to the current working directory.
```
current/working/directory/
... contents of my-artifact
```
To maintain the same behavior for `v2`, you can set the `path` to the name of the artifact so an extra directory gets created.
```
- uses: actions/download-artifact@v2
with:
name: my-artifact
path: my-artifact
```
# Download All Artifacts
If the `name` input parameter is not provided, all artifacts will be downloaded. **To differentiate between downloaded artifacts, a directory denoted by the artifacts name will be created for each individual artifact.**
Example, if there are two artifacts `Artifact-A` and `Artifact-B`, and the directory is `etc/usr/artifacts/`, the directory structure will look like this:
```
etc/usr/artifacts/
Artifact-A/
... contents of Artifact-A
Artifact-B/
... contents of Artifact-B
```
Download all artifacts to a specific directory
```yaml
steps:
- uses: actions/checkout@v2
- uses: actions/download-artifact@v2
with:
path: path/to/artifacts
- name: Display structure of downloaded files
run: ls -R
working-directory: path/to/artifacts
```
Download all artifacts to the current working directory
```yaml
steps:
- uses: actions/checkout@v2
- uses: actions/download-artifact@v2
- name: Display structure of downloaded files
run: ls -R
```
# Download path output
The `download-path` step output contains information regarding where the artifact was downloaded to. This output can be used for a variety of purposes such as logging or as input to other actions. Be aware of the extra directory that is created if downloading all artifacts (no name specified).
```yaml
steps:
- uses: actions/checkout@v2
- uses: actions/download-artifact@v2
id: download
with:
name: 'my-artifact'
path: path/to/artifacts
- name: 'Echo download path'
run: echo ${{steps.download.outputs.download-path}}
```
> Note: The `id` defined in the `download/artifact` step must match the `id` defined in the `echo` step (i.e `steps.[ID].outputs.download-path`)
# Limitations
### 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
```
# @actions/artifact package
Internally the [@actions/artifact](https://github.com/actions/toolkit/tree/main/packages/artifact) NPM package is used to interact with artifacts. You can find additional documentation there along with all the source code related to artifact download.
# License
The scripts and documentation in this project are released under the [MIT License](LICENSE)