Init

Dockerfile

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+FROM docker
+LABEL "com.github.actions.name"="Publish Docker"
+LABEL "com.github.actions.description"="Uses the git branch as the docker tag and pushes the container"
+LABEL "com.github.actions.icon"="anchor"
+LABEL "com.github.actions.color"="blue"
+
+LABEL "repository"="https://github.com/elgohr/Publish-Docker-Github-Action"
+LABEL "maintainer"="Lars Gohr"
+
+RUN apk update \
+  && apk upgrade \
+  && apk add --no-cache git
+
+ADD entrypoint.sh /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]

README.md

@@ -1,2 +1,36 @@
-# Publish-Docker-Github-Action
+# Publishes docker containers to Dockerhub
-A Github Action which uses the Git branch as the Docker tag for pushing to DockerHub
+
+This Action for [Docker](https://www.docker.com/) uses the Git branch as the Docker tag for building and pushing the container to DockerHub.
+Hereby the master-branch is published as the latest-tag.
+
+## Usage
+
+An example workflow:
+
+```hcl
+workflow "Publish Docker" {
+  on = "push"
+  resolves = ["logout"]
+}
+
+action "login" {
+  uses = "actions/docker/login@8cdf801b322af5f369e00d85e9cf3a7122f49108"
+  secrets = ["DOCKER_PASSWORD", "DOCKER_USERNAME"]
+}
+
+action "publish" {
+  uses = "actions/publish-docker@master"
+  args = "myDocker/repository"
+  needs = ["login"]
+}
+
+action "logout" {
+  uses = "actions/docker/cli@8cdf801b322af5f369e00d85e9cf3a7122f49108"
+  args = "logout"
+  needs = ["publish"]
+}
+```
+
+## Argument
+
+You need to provide the desired docker repository to the action.

entrypoint.sh

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+#!/bin/sh -l
+
+echo ${GITHUB_REF}
+BRANCH=$(${GITHUB_REF} | sed -e "s/refs\/heads\///g")
+echo ${BRANCH}
+if [ "${BRANCH}" = "master" ]; then
+    BRANCH="latest"
+fi;
+DOCKER_REPOSITORY=$*
+DOCKERNAME="${DOCKER_REPOSITORY}:${BRANCH}"
+
+docker build -t ${DOCKERNAME} .
+docker push ${DOCKERNAME}