Add custom GitHub action for docker tag and push

- if the push refers a branch the docker tag will be branch-sha
- if the push refers a git tag the docker tag will be th git tag

.github/actions/docker/Dockerfile

@@ -0,0 +1,19 @@
+FROM docker:stable
+
+LABEL "name"="Docker tag and push action"
+LABEL "maintainer"="Stefan Prodan <support@gweave.works>"
+LABEL "version"="1.0.0"
+
+LABEL "com.github.actions.icon"="terminal"
+LABEL "com.github.actions.color"="gray-dark"
+LABEL "com.github.actions.name"="Docker Publish"
+LABEL "com.github.actions.description"="This is an Action to run docker tag and push commands."
+
+RUN apk update \
+  && apk add --no-cache ca-certificates bash git curl \
+  && (apk info | xargs -n1 -I{} apk --quiet add {}-doc); true \
+  && rm -rf /var/cache/apk/*
+
+COPY entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

.github/actions/docker/entrypoint.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+echo "Starting tag and push for image ${DOCKER_IMAGE} release ${GITHUB_REF}"
+
+DOCKER_TAG="latest"
+if [[ "${GITHUB_REF}" == "refs/tags"* ]]; then
+    DOCKER_TAG=$(echo ${GITHUB_REF} | rev | cut -d/ -f1 | rev)
+else
+    DOCKER_TAG=$(echo ${GITHUB_REF} | rev | cut -d/ -f1 | rev)-$(echo ${GITHUB_SHA} | head -c7)
+fi
+
+docker tag app ${DOCKER_IMAGE}:${DOCKER_TAG}
+docker push ${DOCKER_IMAGE}:${DOCKER_TAG}
+
+echo "Docker image pushed to ${DOCKER_IMAGE}:${DOCKER_TAG}"

.github/main.workflow

@@ -1,72 +1,21 @@
-workflow "Publish branch" {
+workflow "Publish container" {
   on = "push"
-  resolves = ["Is branch", "Push branch"]
+  resolves = ["Docker tag and push"]
 }
 
-action "Is branch" {
-  uses = "actions/bin/filter@master"
-  args = "ref refs/heads/*"
-}
-
-action "Test and build branch" {
-  needs = ["Is branch"]
-  uses = "actions/docker/cli@master"
-  args = "build -t app -f Dockerfile.ci ."
-}
-
-action "Tag branch" {
-  needs = ["Test and build branch"]
-  uses = "actions/docker/cli@master"
-  args = "tag app ${DOCKER_IMAGE}:$(echo ${GITHUB_REF} | rev | cut -d/ -f1 | rev)-$(echo ${GITHUB_SHA} | head -c7)"
-  secrets = ["DOCKER_IMAGE"]
-}
-
-action "Login branch" {
-  needs = ["Tag branch"]
-  uses = "actions/docker/login@master"
-  secrets = ["DOCKER_USERNAME", "DOCKER_PASSWORD"]
-}
-
-action "Push branch" {
-  needs = ["Login branch"]
-  uses = "actions/docker/cli@master"
-  args = "push ${DOCKER_IMAGE}:$(echo ${GITHUB_REF} | rev | cut -d/ -f1 | rev)-$(echo ${GITHUB_SHA} | head -c7)"
-  secrets = ["DOCKER_IMAGE"]
-}
-
-
-workflow "Publish release" {
-  on = "release"
-  resolves = ["Push release"]
-}
-
-action "Is release" {
-  uses = "actions/bin/filter@master"
-  args = "ref refs/tags/v*"
-}
-
-action "Test and build release" {
-  needs = ["Is release"]
+action "Test and build" {
   uses = "actions/docker/cli@master"
   args = "build -t app -f Dockerfile.ci ."
 }
 
-action "Login release" {
-  needs = ["Test and build release"]
+action "Docker login" {
+  needs = ["Test and build"]
   uses = "actions/docker/login@master"
   secrets = ["DOCKER_USERNAME", "DOCKER_PASSWORD"]
 }
 
-action "Tag release" {
-  needs = ["Login release"]
-  uses = "actions/docker/cli@master"
-  args = "tag app ${DOCKER_IMAGE}:$(echo ${GITHUB_REF} | rev | cut -d/ -f1 | rev)"
-  secrets = ["DOCKER_IMAGE"]
-}
-
-action "Push release" {
-  needs = ["Tag release"]
-  uses = "actions/docker/cli@master"
-  args = "push ${DOCKER_IMAGE}:$(echo ${GITHUB_REF} | rev | cut -d/ -f1 | rev)"
+action "Docker tag and push" {
+  needs = ["Docker login"]
+  uses = "./.github/actions/docker"
   secrets = ["DOCKER_IMAGE"]
 }