Plugin: updater-docker

Updates a version argument inside a Dockerfile. It is useful when your container build embeds the application version through a build argument.

Installation

semrel plugin install @semrel/docker

semrel plugin install downloads the binary to .semrel/plugins/ and updates .semrel.lock. Commit .semrel.lock to pin the version for your team.

Configuration

version: 1
plugins:
  - uses: @semrel/docker
    args:
      file: Dockerfile
      arg_name: VERSION

Environment Variables

Name	Required	Default	Description
SEMREL_PLUGIN_FILE	no	Dockerfile	Dockerfile to update.
SEMREL_PLUGIN_ARG_NAME	no	VERSION	Docker build argument that stores the release version.

Release Context Variables

• SEMREL_NEXT_VERSION
• SEMREL_CURRENT_VERSION
• SEMREL_TAG_NAME
• SEMREL_DRY_RUN

Behavior

For a 1.4.0 release, the updater can rewrite ARG VERSION=1.3.2 to ARG VERSION=1.4.0 in the target Dockerfile.

Source

• SemRels/updater-docker