Add initial alpine variant

Author: tianon

.travis.yml

@@ -1,15 +1,19 @@
 language: bash
 services: docker
 
+env:
+  - VARIANT=debian
+  - VARIANT=alpine
+
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images
 
 before_script:
   - env | sort
-  - image='ghost'
+  - image="ghost:$VARIANT"
 
 script:
-  - travis_retry docker build -t "$image" .
+  - travis_retry docker build -t "$image" "$VARIANT"
   - ~/official-images/test/run.sh "$image"
 
 after_script:

alpine/Dockerfile

@@ -0,0 +1,54 @@
+# http://support.ghost.org/supported-node-versions/
+# https://github.com/nodejs/LTS
+FROM node:4-alpine
+
+# grab su-exec for easy step-down from root
+RUN apk add --no-cache 'su-exec>=0.2'
+
+RUN apk add --no-cache \
+# add "bash" for "[["
+		bash \
+# add "tar" for "--one-file-system"
+		tar
+
+ENV GHOST_SOURCE /usr/src/ghost
+WORKDIR $GHOST_SOURCE
+
+ENV GHOST_VERSION 0.11.7
+
+RUN set -ex; \
+	\
+	apk add --no-cache --virtual .build-deps \
+		ca-certificates \
+		gcc \
+		make \
+		openssl \
+		python \
+		unzip \
+	; \
+	\
+	wget -O ghost.zip "https://github.com/TryGhost/Ghost/releases/download/${GHOST_VERSION}/Ghost-${GHOST_VERSION}.zip"; \
+	unzip ghost.zip; \
+	\
+	npm install --production; \
+	\
+	apk del .build-deps; \
+	\
+	rm ghost.zip; \
+	npm cache clean; \
+	rm -rf /tmp/npm*
+
+ENV GHOST_CONTENT /var/lib/ghost
+RUN mkdir -p "$GHOST_CONTENT" \
+	&& chown -R node:node "$GHOST_CONTENT" \
+# Ghost expects "config.js" to be in $GHOST_SOURCE, but it's more useful for
+# image users to manage that as part of their $GHOST_CONTENT volume, so we
+# symlink.
+	&& ln -s "$GHOST_CONTENT/config.js" "$GHOST_SOURCE/config.js"
+VOLUME $GHOST_CONTENT
+
+COPY docker-entrypoint.sh /usr/local/bin/
+ENTRYPOINT ["docker-entrypoint.sh"]
+
+EXPOSE 2368
+CMD ["npm", "start"]

alpine/docker-entrypoint.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -e
+
+# allow the container to be started with `--user`
+if [[ "$*" == npm*start* ]] && [ "$(id -u)" = '0' ]; then
+	chown -R node "$GHOST_CONTENT"
+	exec su-exec node "$BASH_SOURCE" "$@"
+fi
+
+if [[ "$*" == npm*start* ]]; then
+	baseDir="$GHOST_SOURCE/content"
+	for dir in "$baseDir"/*/ "$baseDir"/themes/*/; do
+		targetDir="$GHOST_CONTENT/${dir#$baseDir/}"
+		mkdir -p "$targetDir"
+		if [ -z "$(ls -A "$targetDir")" ]; then
+			tar -c --one-file-system -C "$dir" . | tar xC "$targetDir"
+		fi
+	done
+
+	if [ ! -e "$GHOST_CONTENT/config.js" ]; then
+		sed -r '
+			s/127\.0\.0\.1/0.0.0.0/g;
+			s!path.join\(__dirname, (.)/content!path.join(process.env.GHOST_CONTENT, \1!g;
+		' "$GHOST_SOURCE/config.example.js" > "$GHOST_CONTENT/config.js"
+	fi
+fi
+
+exec "$@"

Dockerfile renamed to debian/Dockerfile

@@ -21,21 +21,28 @@ WORKDIR $GHOST_SOURCE
 
 ENV GHOST_VERSION 0.11.7
 
-RUN buildDeps=' \
+RUN set -ex; \
+	\
+	buildDeps=' \
 		gcc \
 		make \
 		python \
 		unzip \
-	' \
-	&& set -x \
-	&& apt-get update && apt-get install -y $buildDeps --no-install-recommends && rm -rf /var/lib/apt/lists/* \
-	&& wget -O ghost.zip "https://github.com/TryGhost/Ghost/releases/download/${GHOST_VERSION}/Ghost-${GHOST_VERSION}.zip" \
-	&& unzip ghost.zip \
-	&& npm install --production \
-	&& apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false -o APT::AutoRemove::SuggestsImportant=false $buildDeps \
-	&& rm ghost.zip \
-	&& npm cache clean \
-	&& rm -rf /tmp/npm*
+	'; \
+	apt-get update; \
+	apt-get install -y $buildDeps --no-install-recommends; \
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	wget -O ghost.zip "https://github.com/TryGhost/Ghost/releases/download/${GHOST_VERSION}/Ghost-${GHOST_VERSION}.zip"; \
+	unzip ghost.zip; \
+	\
+	npm install --production; \
+	\
+	apt-get purge -y --auto-remove $buildDeps; \
+	\
+	rm ghost.zip; \
+	npm cache clean; \
+	rm -rf /tmp/npm*
 
 ENV GHOST_CONTENT /var/lib/ghost
 RUN mkdir -p "$GHOST_CONTENT" \
@@ -46,8 +53,9 @@ RUN mkdir -p "$GHOST_CONTENT" \
 	&& ln -s "$GHOST_CONTENT/config.js" "$GHOST_SOURCE/config.js"
 VOLUME $GHOST_CONTENT
 
-COPY docker-entrypoint.sh /entrypoint.sh
-ENTRYPOINT ["/entrypoint.sh"]
+COPY docker-entrypoint.sh /usr/local/bin/
+RUN ln -s usr/local/bin/docker-entrypoint.sh /entrypoint.sh # backwards compat
+ENTRYPOINT ["docker-entrypoint.sh"]
 
 EXPOSE 2368
 CMD ["npm", "start"]

docker-entrypoint.sh renamed to debian/docker-entrypoint.sh

@@ -41,19 +41,32 @@ join() {
 	echo "${out#$sep}"
 }
 
-commit="$(dirCommit .)"
+for variant in debian alpine; do
+	commit="$(dirCommit "$variant")"
 
-fullVersion="$(git show "$commit":Dockerfile | awk '$1 == "ENV" && $2 == "GHOST_VERSION" { print $3; exit }')"
+	fullVersion="$(git show "$commit":"$variant/Dockerfile" | awk '$1 == "ENV" && $2 == "GHOST_VERSION" { print $3; exit }')"
 
-versionAliases=()
-while [ "${fullVersion%.*}" != "$fullVersion" ]; do
-	versionAliases+=( $fullVersion )
-	fullVersion="${fullVersion%.*}"
-done
-versionAliases+=( $fullVersion latest )
+	versionAliases=()
+	while [ "${fullVersion%.*}" != "$fullVersion" ]; do
+		versionAliases+=( $fullVersion )
+		fullVersion="${fullVersion%.*}"
+	done
+	versionAliases+=(
+		$fullVersion
+		latest
+	)
+
+	variantAliases=( "${versionAliases[@]/%/-$variant}" )
+	variantAliases=( "${variantAliases[@]//latest-/}" )
 
-echo
-cat <<-EOE
-	Tags: $(join ', ' "${versionAliases[@]}")
-	GitCommit: $commit
-EOE
+	if [ "$variant" = 'debian' ]; then
+		variantAliases=( "${versionAliases[@]}" )
+	fi
+
+	echo
+	cat <<-EOE
+		Tags: $(join ', ' "${variantAliases[@]}")
+		GitCommit: $commit
+		Directory: $variant
+	EOE
+done

generate-stackbrew-library.sh

@@ -12,4 +12,4 @@ current="$(
 )"
 
 set -x
-sed -ri 's/^(ENV GHOST_VERSION) .*/\1 '"$current"'/' Dockerfile
+sed -ri 's/^(ENV GHOST_VERSION) .*/\1 '"$current"'/' */Dockerfile