semantic-release-docker-tag

A package to use semantic-release with docker images, without the need of a docker binary.

Why?

Other semantic-release plugins for docker will require a docker binary and the image pulled/build to local storage. This plugins adds the new version tag to an already pushed image.

Supported Steps

verifyConditions

Verifies that required settings are set and tries to load source manifest with provided credentials

publish

Fetches the source manifest and pushes it with the new version

Tested registries

The authentication was tested with the following registries

harbor
nexus
github
dockerhub
gitlab registry

Installation

npm i --save-dev semantic-release-docker-tag

yarn add -D semantic-release-docker-tag

And include the plugin inside the plugins section of the semantic-release configuration.

{
  "plugins": [
    ...,
    "semantic-release-docker-tag"
  ]
}

Configuration

Every option can be set using Environment variable or the plugin config

Example:

{
  "plugins": [
    ["semantic-release-docker-tag", {
            
      }
    ]
  ]
}

Config Option	Environment variable	Required	Default	Description
`registryUrl`	`REGISTRY_URL`	No	`registry.docker.io`	URL of the remote registry, without any protocol
`registryProtocol`	`REGISTRY_PROTOCOL`	No	`https`	Protocol of the remote registry, `https` or `http`
`registryUser`	`REGISTRY_USER`	Yes	-	The user used to access the registry
`registryPassword`	`REGISTRY_PASSWORD`	Yes	-	The password for the user used
`sourceTag`	`SOURCE_TAG`	Yes	-	The source tag which should be retagged (ex. `$COMMIT_SHA`)
`registryImage`	`REGISTRY_IMAGE`	Yes	-	The image receiving the version (ex `hello/world`)

Example CI Config

Gitlab

stages:
  - build-docker
  - semantic-release

build-image:
  stage: build-docker
  image:
    name: gcr.io/kaniko-project/executor:debug
    entrypoint: [""]
  script:
    - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
    - /kaniko/executor --context . --dockerfile ./Dockerfile --destination $CI_REGISTRY_IMAGE:$CI_COMMIT_TAG --destination $CI_REGISTRY_IMAGE:branch-$CI_COMMIT_BRANCH
    
semantic-release:
  stage: semantic-release
  image: node
  before_script:
    - npm install semantic-release
    - npm install @semantic-release/git
    - npm install @semantic-release/gitlab    
    - npm install semantic-release-docker-tag
  script:
     # Gitlab CI Variables already set in project settings
     # REGISTRY_USER, REGISTRY_PASSWORD, REGISTRY_URL, REGISTRY_IMAGE
    - export SOURCE_TAG=$CI_COMMIT_SHA
    - |
      cat > .releaserc << EOF
      {
        "branches": ["master", "main"],
        "debug": true,
        "plugins": [
          "@semantic-release/commit-analyzer",
          "@semantic-release/gitlab",
          "semantic-release-docker-tag"
        ]
      }
      EOF
    - semantic-release
  rules:
    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH 
      when: always

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