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Snapcraft Publish Action

This is a Github Action that can be used to publish snap packages to the Snap Store. In most cases, it will be used with the snapcraft-build-action action to build the package. The following workflow should be sufficient for Snapcraft 7 or later:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - uses: snapcore/action-build@v1
      id: build
    - uses: snapcore/action-publish@v1
      env:
        SNAPCRAFT_STORE_CREDENTIALS: ${{ secrets.STORE_LOGIN }}
      with:
        snap: ${{ steps.build.outputs.snap }}
        release: edge

Alternatively, on Snapcraft 6 and older:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - uses: snapcore/action-build@v1
      id: build
    - uses: snapcore/action-publish@v1
      with:
        store_login: ${{ secrets.STORE_LOGIN }}
        snap: ${{ steps.build.outputs.snap }}
        release: edge

This will build the project, upload the result to the store, and release it to the edge channel. If the release input parameter is omitted, then the build will not be uploaded but not released.

Store Login

In order to upload to the store, the action requires login credentials. Rather than a user name and password, the action expects the data produced by the snapcraft export-login command.

As well as preventing the exposure of the password, it also allows the credentials to be locked down to only the access the action requires:

$ snapcraft export-login --snaps=PACKAGE_NAME \
      --acls package_access,package_push,package_update,package_release \
      exported.txt

This will produce a file exported.txt containing the login data. The credentials can be restricted further with the --channels and --expires arguments if desired.

In order to make the credentials available to the workflow, they should be stored as a repository secret:

  1. choose the "Settings" tab.
  2. choose "Secrets" from the menu on the left.
  3. click "Add a new secret".
  4. set the name to STORE_LOGIN (or whatever is referenced in the workflow), and paste the contents of exported.txt as the value.

Screenshot depicting secrets configuration

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A Github action for publishing snaps

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