enhance example for installing plugins at build time (#458)

* enhance example for installing plugins at build time

Relates to https://github.com/zokradonh/kopano-docker/issues/457

* do not always rebuild the webapp base when building the webapp plugins image
documentation

Makefile

@@ -187,11 +187,13 @@ build-webapp: build-php
 
 build-webapp-demo: build-webapp ## Replaces the actual kopano_webapp container with one that has login hints for demo.kopano.com.
 	docker build --rm \
+		--build-arg docker_repo=$(docker_repo) \
 		-f webapp/Dockerfile.demo \
 		-t $(docker_repo)/kopano_webapp webapp/
 
-build-webapp-plugins: build-webapp ## Example for a custom image to install Kopano WebApp plugins
+build-webapp-plugins: ## Example for a custom image to install Kopano WebApp plugins
 	docker build --rm \
+		--build-arg docker_repo=$(docker_repo) \
 		-f webapp/Dockerfile.plugins \
 		-t $(docker_repo)/kopano_webapp webapp/
 

webapp/Dockerfile.plugins

@@ -1,3 +1,4 @@
+# This Dockerfile can be built by running `make build-webapp-plugins` in the root of this project
 ARG docker_repo=zokradonh
 FROM ${docker_repo}/kopano_webapp
 
@@ -6,6 +7,28 @@ ENV \
     KCCONF_WEBAPPPLUGIN_MDM_PLUGIN_MDM_SERVER=kopano_zpush:9080 \
     KCCONF_WEBAPPPLUGIN_MDM_PLUGIN_MDM_SERVER_SSL=false
 
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
 RUN apt-get update && apt-get install -y --no-install-recommends \
+    "${ADDITIONAL_KOPANO_PACKAGES}" \
+    "${ADDITIONAL_KOPANO_WEBAPP_PLUGINS}" \
+    kopano-webapp-plugin-files \
+    kopano-webapp-plugin-filesbackend-owncloud \
+    kopano-webapp-plugin-intranet \
     kopano-webapp-plugin-mdm \
+    kopano-webapp-plugin-pimfolder \
+    kopano-webapp-plugin-smime \
     && rm -rf /var/cache/apt /var/lib/apt/lists
+
+# tweak to make the container read-only
+RUN mkdir -p /tmp/webapp/ && \
+    for i in /etc/kopano/webapp/* /etc/kopano/webapp/.[^.]*; do \
+        if [ -L "$i" ]; then \
+            continue; \
+        fi; \
+        if [[ "$i" = *.dist ]]; then \
+            continue; \
+        fi; \
+        mv -v "$i" "$i.dist"; \
+        ln -s /tmp/webapp/"$(basename "$i")" "$i"; \
+    done

webapp/start.sh

@@ -31,6 +31,7 @@ if [ "${AUTOCONFIGURE}" == true ]; then
 		echo "Notice: Container is run read-only, skipping package installation."
 		echo "If you want to have additional packages installed in the container either:"
 		echo "- build your own image with the packages already included"
+		echo "  - see https://github.com/zokradonh/kopano-docker/blob/master/webapp/Dockerfile.plugins for an example of such a Dockerfile"
 		echo "- switch the container to 'read_only: false'"
 	fi
 
@@ -52,7 +53,8 @@ if [ "${AUTOCONFIGURE}" == true ]; then
 	# fallback for plugins installed during runtime
 	for i in /etc/kopano/webapp/*.php; do
 		filename=$(basename -- "$i")
-		if [ "$filename" = config.php ]; then
+		# skip file if its already a symlink
+		if [ -L "$i" ]; then
 			continue
 		fi
 		mv -vn "$i" "/tmp/webapp/$filename"