Revamped build process

build

@@ -1,7 +1,99 @@
-#!/bin/sh
+#!/bin/bash
 
-docker pull nginx:alpine
-docker build $1\
-  -t bkraul/nginx-nextcloud:latest \
-  -t bkraul/nginx-nextcloud:alpine \
-  .
+# use this as: PUSH=0 ./build ... in order to set the variable. default is PUSH=1
+PUSH=${PUSH:-1}
+# use this as: FORCE=1 ./build ... in order to set the variable. default is FORCE=0
+FORCE=${FORCE:-0}
+
+if [ ! "$1" == "" ]; then 
+    IMAGE_VERSION=$1
+else
+    echo "No nginx version specified."
+    echo "Avaiilable versions: 1.26, 1.27, mainline, stable"
+    echo "Exiting (1)."
+    exit 1
+fi
+
+if [ ! "$2" == "" ]; then 
+    VARIANTS=$2
+else
+    VARIANTS=("alpine" "alpine-slim" "bookworm")
+fi
+
+# set username and password
+# requires vars DOCKER_USER and DOCKER_PASS to be defined before calling.
+# useful functions.
+function docker_tag_exists() {
+    TOKEN=$(curl -s -H "Content-Type: application/json" -X POST -d '{"username": "'${DOCKER_USER}'", "password": "'${DOCKER_PASS}'"}' https://hub.docker.com/v2/users/login/ | jq -r .token)
+    curl --silent -f --head -lL https://hub.docker.com/v2/repositories/$1/tags/$2/ > /dev/null
+}
+
+for item in "${!VARIANTS[@]}"
+do
+    IMAGE_VARIANT=${VARIANTS[$item]}
+    UPSTREAM_IMAGE=nginx
+    UPSTREAM_IMAGE_TAG=${IMAGE_VERSION}-${IMAGE_VARIANT}
+    IMAGE=bkraul/nginx-nextcloud
+
+    echo "Building nginx-nextcloud ${IMAGE_VERSION}, variant: ${IMAGE_VARIANT}..."
+
+    # pull the parent image from docker hub.
+    echo "Pulling upstream image ${UPSTREAM_IMAGE}:${UPSTREAM_IMAGE_TAG}..."
+    docker pull ${UPSTREAM_IMAGE}:${UPSTREAM_IMAGE_TAG} > /dev/null
+    UPSTREAM_ID=$(docker image inspect --format='{{index .Id}}' ${UPSTREAM_IMAGE}:${UPSTREAM_IMAGE_TAG})
+    UPSTREAM_ID=${UPSTREAM_ID:7}
+
+    # get the version number.
+    NGINX_VERSION=$(docker inspect ${UPSTREAM_IMAGE}:${UPSTREAM_IMAGE_TAG} | jq -r '.[].Config.Env[] | select(match("^NGINX_VERSION"))')
+    echo "Returned nginx version: ${NGINX_VERSION}"
+    NGINX_VERSION=${NGINX_VERSION:14}    
+    IMAGE_TAG=${NGINX_VERSION}-${IMAGE_VARIANT}
+
+    if docker_tag_exists ${IMAGE} ${IMAGE_TAG}; then
+        # nothing to do, the image already exists.
+        echo Image ${IMAGE}:${IMAGE_TAG} already exists.
+        echo "----------------------------"
+        if [ $FORCE == 0 ]; then continue; fi
+    fi
+
+    # determine the common files to use.
+    # Dockerfile
+    DOCKERFILE_DIR="./build-common/dockerfile"
+    DOCKERFILE=""
+    if [ -f "${DOCKERFILE_DIR}/Dockerfile" ]; then DOCKERFILE="${DOCKERFILE_DIR}/Dockerfile"; fi
+    if [ -f "${DOCKERFILE_DIR}/Dockerfile-${IMAGE_VERSION}" ]; then DOCKERFILE="${DOCKERFILE_DIR}/Dockerfile-${IMAGE_VERSION}"; fi
+    if [ -f "${DOCKERFILE_DIR}/Dockerfile-${IMAGE_VARIANT}" ]; then echo "Image variant"; DOCKERFILE="${DOCKERFILE_DIR}/Dockerfile-${IMAGE_VARIANT}"; fi
+    if [ -f "${DOCKERFILE_DIR}/Dockerfile-${IMAGE_VARIANT}-${IMAGE_VERSION}" ]; then DOCKERFILE="${DOCKERFILE_DIR}/Dockerfile-${IMAGE_VARIANT}-${IMAGE_VERSION}"; fi
+
+    # if no valid Dockerfile is found, we abort current build and go to next variant if available.
+    if [ "${DOCKERFILE}" = "" ]; then echo "No valid Dockerfile found."; continue; fi
+
+    # image doesn't exist we need build and push
+    echo Image ${IMAGE}:${IMAGE_TAG} does not exist.
+    echo "Building image(s)..."
+
+    docker build \
+        --file ${DOCKERFILE} \
+        --no-cache \
+        -t ${IMAGE}:${UPSTREAM_IMAGE_TAG} \
+        -t ${IMAGE}:${IMAGE_TAG} \
+        --build-arg BASE_IMAGE="${UPSTREAM_IMAGE}:${UPSTREAM_IMAGE_TAG}" \
+        --progress plain \
+        ./build-common
+
+    if [ $? == 0 ]; then
+        # don't push if specified so (continue the variant loop).
+        if [ ${PUSH} == 0 ]; then
+            echo "----------------------------"
+            continue;
+        fi
+
+        echo "Pushing image(s)..."
+        docker push ${IMAGE}:${IMAGE_TAG}
+        docker push ${IMAGE}:${UPSTREAM_IMAGE_TAG}
+    else
+        echo "The build operation failed."
+        echo "Please debug and try again."
+    fi
+    echo "----------------------------"
+done