"Undefined Command" no matter which command I put in the action.

[apotek]

Hello,

Attempting to run my action installs the Upsun CLI, but any command I put in the command: section fails with "Undefined Command"

Here's my workflow file:

---
name: Trigger Platform.sh Snapshot
on:  # yamllint disable-line rule:truthy
  schedule:
    # Run at 5:03 UTC.
    - cron: "3 5 * * *"
  workflow_dispatch:

jobs:
  trigger-psh-snapshot:
    runs-on: ubuntu-latest
    timeout-minutes: 15
    steps:
      - uses: upsun/action-cli@v1
        with:
          cli_token: ${{ secrets.PLATFORMSH_CLI_TOKEN }}
          project_id: ${{ secrets.PLATFORMSH_PROJECT_ID }}
          environment_name: main
          command: backup:create --yes --wait -v
      - name: Notify slack on failure
        if: failure()
        uses: voxmedia/github-action-slack-notify-build@v2
        with:
          channel: devops-alerts
          status: FAILED
          color: danger
        env:
          SLACK_BOT_TOKEN: '${{ secrets.GHACTION_SLACK_BOT_TOKEN }}'

Based on what I see in your README for this project, I have configured all the necessary parts to run the command.

I'll also note that I get this deprecation warning from GitHub at the end of the run, but that's not the cause of the issue of course.

Warning: Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: upsun/action-cli@v1. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026.

Here's the full output of the failing run:

Run upsun/action-cli@v1

with:

cli_token: ***

project_id: ***

environment_name: main

command: backup:create --yes --wait --environment main -v

cli_provider: upsun

Install upsun CLI, version:

Prepare CLI...

No CLI found, download and install it!

Download Installer...

Run Installer...

/usr/bin/bash ./installer.sh

+------------------------------------------------+

|                                                |

|              Upsun CLI Installer               |

|                                                |

+------------------------------------------------+
Checking environment

[] Your kernel (linux) is supported

[] Your architecture (amd64) is supported

[] Using raw install method

[] cURL is installed

[] No version specified, using latest (5.10.3)

[] Gzip is installed

[] sha1sum is installed

[] /home/runner/.local/bin is in $PATH
Target directories

Binary will be installed in /home/runner/.local/bin
Downloading the Upsun CLI

Downloading https://github.com/upsun/cli/releases/download/v5.10.3/upsun_5.10.3_linux_amd64.tar.gz

Uncompressing archive

Making the binary executable

Installing the binary under /home/runner/.local/bin
+------------------------------------------------+

|                                                |

|   Upsun CLI has been installed successfully.   |

|                                                |

+------------------------------------------------+
What's next?

To use the CLI, run: upsun
Useful links:

CLI introduction: https://docs.upsun.com/get-started/introduction.html#cli
Thank you for using Upsun!

Run CLI command...

Undefined Command

[apotek]

My workaround for the moment is to use this action only to install the Upsun CLI and then subsequently run my command using a normal shell command instead of the provided command: argument, comme ça

    steps:
      - uses: upsun/action-cli@v1
        with:
          cli_token: ${{ secrets.UPSUN_CLI_TOKEN }}
          project_id: ${{ secrets.UPSUN_PROJECT_ID }}
          # This is not working and was reported as an issue.
          # command: backup:create --yes --wait --environment main -v
          # So we use the shell instead...
      - name: Trigger Upsun snapshot
        run: |
          UPSUN_CLI_TOKEN=${{ secrets.UPSUN_CLI_TOKEN }} upsun backup:create --yes --wait --project=${{ secrets.UPSUN_PROJECT_ID }} --environment=main -v