From 604039a37b41e8fbcebdfd94a0bdced5c209bf62 Mon Sep 17 00:00:00 2001
From: Dave Henderson <dhenderson@gmail.com>
Date: Wed, 25 Apr 2018 16:31:28 -0400
Subject: Adding alpine Docker image variant

Signed-off-by: Dave Henderson <dhenderson@gmail.com>
---
 Dockerfile      | 18 ++++++++++++++++++
 hooks/build     | 11 +++++++++++
 hooks/post_push |  8 +++++++-
 3 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 02f4a8f9..e02930d8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -36,6 +36,24 @@ ENTRYPOINT [ "/gomplate" ]
 
 CMD [ "--help" ]
 
+FROM alpine:3.7 AS gomplate-alpine
+
+ARG BUILD_DATE
+ARG VCS_REF
+ARG OS=linux
+ARG ARCH=amd64
+
+LABEL org.label-schema.build-date=$BUILD_DATE \
+      org.label-schema.vcs-ref=$VCS_REF \
+      org.label-schema.vcs-url="https://github.com/hairyhenderson/gomplate"
+
+RUN apk add --no-cache ca-certificates
+COPY --from=artifacts /bin/gomplate_${OS}-${ARCH}-slim /bin/gomplate
+
+ENTRYPOINT [ "/gomplate" ]
+
+CMD [ "--help" ]
+
 FROM scratch AS gomplate-slim
 
 ARG BUILD_DATE
diff --git a/hooks/build b/hooks/build
index a01a27ff..977090ae 100755
--- a/hooks/build
+++ b/hooks/build
@@ -29,3 +29,14 @@ docker build --build-arg BUILD_DATE \
              --build-arg VCS_REF \
              --target gomplate-slim \
              -t ${DOCKER_REPO}:${SLIM_TAG} .
+
+if [ "$DOCKER_TAG" == "latest" ]; then
+  export ALPINE_TAG="alpine"
+else
+  export ALPINE_TAG="${DOCKER_TAG}-alpine"
+fi
+echo "======== Building ${DOCKER_REPO}:${ALPINE_TAG}"
+docker build --build-arg BUILD_DATE \
+             --build-arg VCS_REF \
+             --target gomplate-alpine \
+             -t ${DOCKER_REPO}:${ALPINE_TAG} .
diff --git a/hooks/post_push b/hooks/post_push
index 2a0457b7..03e88cac 100755
--- a/hooks/post_push
+++ b/hooks/post_push
@@ -9,11 +9,15 @@ docker push ${DOCKER_REPO}:artifacts
 
 if [ "$DOCKER_TAG" == "latest" ]; then
   export SLIM_TAG="slim"
+  export ALPINE_TAG="alpine"
 else
   export SLIM_TAG="${DOCKER_TAG}-slim"
+  export ALPINE_TAG="${DOCKER_TAG}-alpine"
 fi
-# Need to push the slim image too
+
+# Need to push the other images too
 docker push $DOCKER_REPO:${SLIM_TAG}
+docker push $DOCKER_REPO:${ALPINE_TAG}
 
 # This magic figures out if we're currently on a tag (i.e. a release).
 # We only want to have special tags for releases.
@@ -21,6 +25,8 @@ if (git describe --abbrev=0 --exact-match &>/dev/null); then
   tag=$(git describe --abbrev=0 --exact-match)
   docker tag $IMAGE_NAME $DOCKER_REPO:$tag
   docker tag $DOCKER_REPO:${SLIM_TAG} $DOCKER_REPO:${tag}-slim
+  docker tag $DOCKER_REPO:${ALPINE_TAG} $DOCKER_REPO:${tag}-alpine
   docker push $DOCKER_REPO:$tag
   docker push $DOCKER_REPO:${tag}-slim
+  docker push $DOCKER_REPO:${tag}-alpine
 fi
-- 
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