Shorten installation by including some installation steps into a shell script

lib/prepare-system.sh

@@ -0,0 +1,67 @@
+#!/bin/bash -e
+
+source lib/log.sh
+source lib/functions.sh
+
+log "INFO" "Preparing your system for bridgehead installation ..."
+
+# Create the bridgehead user
+if id bridgehead &>/dev/null; then
+    log "INFO" "Existing user with id $(id -u bridgehead) will be used by the bridgehead system units."
+else
+    log "INFO" "Now creating a system user to own the bridgehead's files."
+    useradd -M -g docker -N bridgehead || fail_and_report ""
+fi
+
+# Clone the OpenSource repository of bridgehead
+bridgehead_repository_url="https://github.com/samply/bridgehead.git"
+if [ -d "/srv/docker/bridgehead" ]; then
+    current_owner=$(stat -c '%U' /srv/docker/bridgehead)
+    if [ "$(su -c 'git -C /srv/docker/bridgehead remote get-url origin' $current_owner)" == "$bridgehead_repository_url" ]; then
+        log "INFO" "Bridgehead's open-source repository has been found at /srv/docker/bridgehead"
+    else
+        log "ERROR" "The directory /srv/docker/bridgehead seems to exist, but doesn't contain a clone of $bridgehead_repository_url\nPlease delete the directory and try again."
+        exit 1
+    fi
+else
+    log "INFO" "Cloning $bridgehead_repository_url to /srv/docker/bridgehead"
+    mkdir -p /srv/docker/
+    git clone bridgehead_repository_url /srv/docker/bridgehead -b feature/samplyBeam
+fi
+
+case "$PROJECT" in
+	ccp)
+		site_configuration_repository_middle="git.verbis.dkfz.de/bridgehead-configurations/bridgehead-config-"
+		;;
+	bbmri)
+		site_configuration_repository_middle="git.verbis.dkfz.de/bbmri-bridgehead-configs/"
+		;;
+	*)
+		log ERROR "Internal error, this should not happen."
+        exit 1
+		;;
+esac
+
+# Clone the site-configuration
+if [ -d /etc/bridgehead ]; then
+    current_owner=$(stat -c '%U' /etc/bridgehead)
+    if [ "$(su -c 'git -C /etc/bridgehead remote get-url origin' $current_owner | grep $site_configuration_repository_middle)" ]; then
+        log "INFO" "Your site config repository in /etc/bridgehead seems to be installed correctly."
+    else
+        log "WARN" "Your site configuration repository in /etc/bridgehead seems to have another origin than git.verbis.dkfz.de. Please check if the repository is correctly cloned!"
+    fi
+else
+    log "INFO" "Now cloning your site configuration repository for you."
+    read -p "Please enter your site: " site
+    read -s -p "Please enter the bridgehead's access token for your site configuration repository (will not be echoed): " access_token
+    site_configuration_repository_url="https://bytoken:${access_token}@${site_configuration_repository_middle}$(echo $site | tr '[:upper:]' '[:lower:]').git"
+    git clone $site_configuration_repository_url /etc/bridgehead
+    if [ $? -gt 0 ]; then
+        log "ERROR" "Unable to clone your configuration repository. Please obtain correct access data and try again."
+    fi
+fi
+
+chown -R bridgehead /etc/bridgehead /srv/docker/bridgehead
+
+log INFO "System preparation is completed and private key is present."
+