Docker environment setup 🐋

An action to easily set up a Docker build environment with some useful environment variables.

Usage

Here's an example of how to use this action, with all the parameters filled in:

jobs:
  setup:
    runs-on: ubuntu-latest
    steps:
      - name: Docker environment setup
        uses: byloth/docker-setup-action@v1
        with:
          registry: registry.domain.io
          repository: AccountUsername/repository-name
          shaLength: '8'

Inputs

Name	Required	Default	Description
registry	false	''	The registry to prepend to the Docker image name.
repository	false	'${{ github.repository }}'	The repository to use as a Docker image name.
shaLength	false	'7'	The length to shorten the SHA to use as a Docker image tag.

Outputs

shortSha

The shortened SHA of the current commit (retrieved from the GITHUB_SHA environment variable) based on the specified shaLength from the input.
This information is also injected into the environment via the GITHUB_SHORT_SHA environment variable.

You can use it as the tag of the Docker image built by your action.

Example:

# Input
GITHUB_SHA="52dd68e7dd36a8b1b73d071d9eb54d0899052c77"
SHA_LENGTH="8"

# Output
GITHUB_SHORT_SHA="52dd68e7"

branchSlug

The slugified version of the branch name (retrieved from the GITHUB_REF_NAME environment variable).
This information is also injected into the environment via the GITHUB_REF_SLUG environment variable.

You can use it as the tag of the Docker image built by your action.

Example:

# Inputs
GITHUB_REF_NAME="feature/gh-actions"

# Output
GITHUB_REF_SLUG="feature-gh-actions"

dockerImage

The Docker image name matching the repository and optionally the registry from the input.
This information is also injected into the environment via the DOCKER_IMAGE environment variable.

You can use it as the name of the Docker image built by your action.

Example:

# Inputs
REPOSITORY="Byloth/cmangos-docker"

# Output
DOCKER_IMAGE="byloth/cmangos-docker"

... or if you use a specific registry:

# Inputs
REGISTRY="ghcr.io"
REPOSITORY="Bylothink/do-you-dare"

# Output
DOCKER_IMAGE="ghcr.io/bylothink/do-you-dare"