Seq to upgrade and backup an existing element-web installation

seqs/element-web.cfg.example

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+# Matrix element web sequence configuration
+
+ELEMENT_WEB_LOC="/var/www/element"
+ELEMENT_WEB_BACKUP="/root/backup/element"

seqs/element-web.sh

@@ -0,0 +1,139 @@
+#!/bin/bash
+
+toolName=element-web
+latestUrl="https://api.github.com/repos/vector-im/element-web/releases/latest"
+
+# Get script working directory
+# (when called from a different directory)
+WDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >>/dev/null 2>&1 && pwd )"
+CONFIG=0
+CONFIG_FILE_NAME="${toolName}.cfg"
+CONFIG_FILE_TEMPLATE="$WDIR/${CONFIG_FILE_NAME}.example"
+
+step_config() {
+  initSeqConfig "$CONFIG_FILE_NAME" "$CONFIG_FILE_TEMPLATE"
+  if [ $? -eq 0 ] ; then
+    echo "     ${toolName} path:   ${ELEMENT_WEB_LOC}"
+    echo "     ${toolName} backup: ${ELEMENT_WEB_BACKUP}"
+    CONFIG=1
+  fi
+}
+
+step_20_info() { 
+  echo -n "Create a backup [ELEMENT WEB ROOT]"
+  if [ $CONFIG -ne 0 ] ; then
+    echo " at $ELEMENT_WEB_BACKUP"
+  else
+    echo
+  fi
+}
+step_20_alias() { ALIAS="backup"; }
+step_20() {
+  shift
+  local tempRoot=
+  if [ $CONFIG -eq 0 ] ; then
+    echoerr " [E] No configuration file found"
+    return 1
+  fi
+  if [ ! -z $ELEMENT_WEB_BACKUP ] ; then
+    exe mkdir -p "$ELEMENT_WEB_BACKUP"
+  fi
+  if [ ! -z $1 ] ; then
+    tempRoot="$1"
+  else
+    tempRoot="$ELEMENT_WEB_LOC"
+  fi
+
+  local wwwBackup="$ELEMENT_WEB_BACKUP/${toolName}_www_`date +%Y%m%d-%H%M%S`.tar.gz"
+  echo " [I] Backing up webserver directory to $wwwBackup"
+  exe cd "$tempRoot/.."
+  exe tar czf "$wwwBackup" $(basename "$tempRoot")
+}
+
+step_22_info() {
+  shift
+  if [ -z $1 ] ; then
+    echo -n "Get latest version from github"
+    if [ $CONTEXT_HELP -eq 0 ] ; then
+      echo ": $(curl --silent "$latestUrl" | grep -Po '"tag_name": "\K.*?(?=")')"
+    else
+      echo " [CUSTOM VERSION]"
+    fi
+  else
+    echo "Get version $1 from github"
+  fi
+}
+step_22_alias() { ALIAS="upgrade"; }
+step_22() {
+  shift # don't need step number
+  local latestVersion=
+  if [ ! -z $1 ] ; then
+    latestVersion="$1"
+  else
+    latestVersion=$(curl --silent "$latestUrl" | grep -Po '"tag_name": "v\K.*?(?=")')
+  fi
+
+  if [ -z $latestVersion ] ; then
+    echoerr " [E] Cannot determine latest version from github repository"
+    return 1
+  elif [ $QUIET -eq 0 ] ; then
+    echo
+    exe read -p "Install $latestVersion to $ELEMENT_WEB_LOC [n]o/(y)es? " answer
+    case $answer in
+      [yY])
+        ;;
+      *)
+        echoerr " [I] Upgrade aborted"
+        return 1
+        ;;
+    esac
+  fi
+
+  local isInstalled=$(grep -E "${latestVersion}" "${ELEMENT_WEB_LOC}/version" >>/dev/null && echo "1" || echo "0")
+  if [ $isInstalled -eq 1 ] ; then
+    echoerr " [E] Version $latestVersion is already installed"
+    return 2
+  fi
+  
+  # Download
+  local downUrl="https://github.com/vector-im/element-web/releases/download/v${latestVersion}/riot-v${latestVersion}.tar.gz"
+  local tempExtract="$tempDown/riot-v$latestVersion"
+  
+  if [ ! -e "$tempExtract" ] ; then
+    exe mkdir -p "$tempDown"
+    exe wget -O "$tempLoc" $downUrl
+    endReturn -o $? "Download failed: $downUrl"
+    exe cd "$tempDown"
+    exe tar -xf "$tempLoc"
+    endReturn -o $? "Extract failed: $tempLoc"
+  else
+    echo " [I] Found existing download: $tempExtract"
+  fi
+
+  # Installation
+  local tempBu="${ELEMENT_WEB_LOC}_bu_`date +%Y%m%d-%H%M%S`"
+
+  exe mv "$ELEMENT_WEB_LOC" "$tempBu"
+  step backup "$tempBu"
+  endReturn -o $? "Backup failed; $ELEMENT_WEB_LOC renamed!"
+  echo " [I] Installing version $latestVersion to $ELEMENT_WEB_LOC"
+  exe mv "$tempExtract" "$ELEMENT_WEB_LOC"
+  exe chown -R www-data: "$ELEMENT_WEB_LOC"
+
+  # Configuration
+  echo " [I] Copying configuration"
+  exe cp -ar "$tempBu/config.json" "$ELEMENT_WEB_LOC/"
+
+  echo " [I] Don't forget to \"clean\" if everything is working as expected"
+}
+tempDown="/tmp/${toolName}"
+tempLoc="$tempDown/${toolName}.tar.gz"
+
+step_24_info() { echo "Clean temporary files: $tempDown"; }
+step_24_alias() { ALIAS="clean"; }
+step_24() {
+  exe rm -rf "$tempDown"
+}
+
+VERSION_SEQREV=11
+. /usr/local/bin/sequencer.sh