Initial version of the new Docker Build scripts

Successfully builds the container, places the files, scripts and links
we need so fart into the right places using a rootfs tar file so that we
don't pollute the container unneccessarily and keep the Dockerfile
simple.

Any in-container scripting is missing so far, so the whole thing does
not yet start up successfully or popluate the config share in any way.
That is for another day.

build-rootfs.sh

@@ -0,0 +1,148 @@
+#!/bin/bash
+
+set -ex
+
+# Configuration options you usually edit go here
+ROUNDCUBEMAIL_VERSION=1.3.7
+CHECK_GPG=false
+CLEAN_INTERMEDIATES=false
+CONTAINER_VOLUME_CONFIG=/var/roundcube/config
+CONTAINER_WEBROOT=/var/www/html
+CONTAINER_PHP_CONFD=/usr/local/etc/php/conf.d/
+CONTAINER_SCRIPTS=/usr/local/sbin
+
+# This is internal stuff used to build everything
+# Be aware, that several of these paths are used with rm -rf!
+SRCDIR=$(pwd)/src
+TMPDIR=$(pwd)/tmp
+BUILDDIR=$(pwd)/build
+SCRIPTS_SRC=${SRCDIR}/scripts
+ROUNDCUBE_DOWNLOAD=${TMPDIR}/roundcubemail.tar.gz
+ROUNDCUBE_ASC_DOWNLOAD=${ROUDCUBE_DOWNLOAD}.asc
+ROUNDCUBE_SRC=${TMPDIR}/roundcubemail
+ISPCONFIG_DOWNLOAD=${TMPDIR}/ispconfig3_roundcube.zip
+ISPCONFIG_SRC=${TMPDIR}/ispconfig3_roundcube
+ROOTFSTREE=${TMPDIR}/tree
+ROOTFSFILE=${BUILDDIR}/rootfs.tar.gz
+CONFIG_DST=${ROOTFSTREE}${CONTAINER_VOLUME_CONFIG}
+WEBROOT_DST=${ROOTFSTREE}${CONTAINER_WEBROOT}
+PHP_CONFD_DST=${ROOTFSTREE}${CONTAINER_PHP_CONFD}
+SCRIPTS_DST=${ROOTFSTREE}${CONTAINER_SCRIPTS}
+
+#### Sanitize Build Enviornment
+if [ -d ${TMPDIR} ]; then
+	rm -rf ${TMPDIR}
+fi
+mkdir ${TMPDIR}
+
+if [ -d ${BUILDDIR} ]; then
+	rm -rf ${BUILDDIR}
+fi
+mkdir ${BUILDDIR}
+
+#### Prepare the roundcube source 
+
+# Download Roundcube and verify GPG if configured to do so:
+if [ -f ${ROUNDCUBE_DOWNLOAD} ]; then 
+	rm -f ${ROUNDCUBE_DOWNLOAD} 
+fi
+
+curl -o ${ROUNDCUBE_DOWNLOAD} \
+	-SL https://github.com/roundcube/roundcubemail/releases/download/${ROUNDCUBEMAIL_VERSION}/roundcubemail-${ROUNDCUBEMAIL_VERSION}-complete.tar.gz
+
+if [ "$CHECK_GPG" = true ]; then
+	export GNUPGHOME="$(mktemp -d)"
+
+	if [ -f ${ROUNDCUBE_ASC_DOWNLOAD} ]; then 
+		rm -f ${ROUNDCUBE_ASC_DOWNLOAD} 
+	fi
+	curl -o ${ROUNDCUBE_ASC_DOWNLOAD} \
+		-SL https://github.com/roundcube/roundcubemail/releases/download/${ROUNDCUBEMAIL_VERSION}/roundcubemail-${ROUNDCUBEMAIL_VERSION}-complete.tar.gz.asc
+
+	# ha.pool.sks-keyservers.net seems to be unreliable, use pgp.mit.edu as fallback
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys F3E4C04BB3DB5D4215C45F7F5AB2BAA141C4F7D5 \
+		|| gpg --keyserver pgp.mit.edu --recv-keys F3E4C04BB3DB5D4215C45F7F5AB2BAA141C4F7D5
+
+	gpg --batch --verify ${ROUNDCUBE_ASC_DOWNLOAD} ${ROUNDCUBE_DOWNLOAD}
+
+	# Clean up behind us
+	if [ "$CLEAN_INTERMEDIATES" = true ]; then
+		gpgconf --kill all
+		rm -rf "$GNUPGHOME" ${ROUNDCUBE_ASC_DOWNLOAD}
+	fi
+fi
+
+# Extract the file into a temporary location and clean up behind us
+tar -xzf ${ROUNDCUBE_DOWNLOAD} -C ${TMPDIR}
+
+# upstream tarballs include ./roundcubemail-${ROUNDCUBEMAIL_VERSION}/ so this gives us TMPDIR/roundcubemail-${ROUNDCUBEMAIL_VERSION}
+mv ${TMPDIR}/roundcubemail-${ROUNDCUBEMAIL_VERSION} ${ROUNDCUBE_SRC}
+
+# Clean up the source tree for later use
+rm -rf ${ROUNDCUBE_SRC}/installer
+
+# Clean up behind us
+if [ "$CLEAN_INTERMEDIATES" = true ]; then
+	rm -f ${ROUNDCUBE_DOWNLOAD} 
+fi
+
+
+#### Prepare the ISPConfig Stuff
+
+if [ -f ${ISPCONFIG_DOWNLOAD} ]; then 
+	rm -f ${ISPCONFIG_DOWNLOAD} 
+fi
+curl -o ${ISPCONFIG_DOWNLOAD} -SL https://github.com/w2c/ispconfig3_roundcube/archive/master.zip
+
+unzip -q ${ISPCONFIG_DOWNLOAD} -d ${TMPDIR}
+# This gives us a dir ispconfig3_roundcube-master, which we normalize
+mv ${TMPDIR}/ispconfig3_roundcube-master ${ISPCONFIG_SRC}
+
+# Clean up the source tree for later use
+rm -f ${ISPCONFIG_SRC}/.gitignore ${ISPCONFIG_SRC}/README.md
+
+#### Create the ROOT FS TREE
+
+mkdir -p ${ROOTFSTREE}
+
+# Prepare the Webroot directory with the source tree, then create some links, which we'll 
+# need during runtime, they will be created by our entry point script.
+mkdir -p ${WEBROOT_DST}
+tar -c --one-file-system -C ${ROUNDCUBE_SRC} . | tar -x -C ${WEBROOT_DST}
+ln -s ${CONTAINER_VOLUME_CONFIG}/config.inc.php ${WEBROOT_DST}/config/config.inc.php
+cp ${SRCDIR}/db.inc.php ${WEBROOT_DST}/config/db.inc.php
+
+# Setup PHP
+mkdir -p ${PHP_CONFD_DST}
+cp ${SRCDIR}/php.ini ${PHP_CONFD_DST}/php.ini
+
+# Move the ISPConfig Plugins into place, again create some links which we'll need during
+# runtime. These too will be created by our entry point script
+tar -c --one-file-system -C ${ISPCONFIG_SRC} . | tar -x -C ${WEBROOT_DST}/plugins
+ln -s ${CONTAINER_VOLUME_CONFIG}/ispconfig3_account.inc.php ${WEBROOT_DST}/plugins/ispconfig3_account/config/config.inc.php
+
+# Add Entry Point
+cp -a ${SRCDIR}/docker-entrypoint.sh ${ROOTFSTREE}
+
+# Add all helper scripts
+mkdir -p ${SCRIPTS_DST}
+
+curl -o ${SCRIPTS_DST}/wait-for-it.sh \
+	-SL https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh 
+chmod +x ${SCRIPTS_DST}/wait-for-it.sh
+
+cp -a ${SCRIPTS_SRC}/* ${SCRIPTS_DST}
+
+# Clean up behind us
+if [ "$CLEAN_INTERMEDIATES" = true ]; then
+	rm -rf ${ROUNDCUBE_SRC}
+	rm -rf ${ISPCONFIG_SRC}
+fi
+
+#### Now we tar everything together, so that the Dockerfile can put everything in place in one run
+tar -czf ${ROOTFSFILE} -C ${ROOTFSTREE} .
+
+# Clean up behind us
+if [ "$CLEAN_INTERMEDIATES" = true ]; then
+	rm -rf ${ROOTFSTREE}
+fi