updater-docker

Updates a version argument in a Dockerfile.

This plugin is distributed as the standalone Go binary semrel-plugin-updater-docker. Semrel executes the binary as a subprocess, provides plugin configuration through SEMREL_PLUGIN_* environment variables, provides release context through SEMREL_* environment variables, reads standard output, and treats exit code 0 as success and any non-zero exit code as failure. Install the binary in ~/.semrel/plugins/ or anywhere on your $PATH.

Installation

go install github.com/SemRels/updater-docker/cmd/plugin@latest

Configuration

plugins:
  - name: updater-docker
    path: ~/.semrel/plugins/semrel-plugin-updater-docker
    env:
      SEMREL_PLUGIN_FILE: "Dockerfile"
      SEMREL_PLUGIN_ARG_NAME: "VERSION"

SEMREL_PLUGIN_* variables

Name	Required	Description	Default
SEMREL_PLUGIN_FILE	Optional	Path to the Dockerfile to update.	Dockerfile
SEMREL_PLUGIN_ARG_NAME	Optional	Docker build argument name that stores the version.	VERSION

SEMREL_* release context used

Variable	Description
SEMREL_VERSION	Resolved release version for the current run.
SEMREL_NEXT_VERSION	Next version computed by semrel for the release.
SEMREL_DRY_RUN	Whether semrel is running in dry-run mode.

Example behavior

The plugin updates the configured Docker build argument to the new release version and prints what changed.

License

Apache-2.0