#!/bin/bash

# update latest NextCloudPi code from github

{
  [ "$(id -u)" -ne 0 ] && { printf "Must be run as root. Try 'sudo $0'\n"; exit 1; }

  BRANCH="${1:-master}"
  [[ "$BRANCH" != "master" ]] && echo "INFO: updating to development branch '$BRANCH'"

  TMPDIR="$( mktemp -d /tmp/ncp-update.XXXXXX || ( echo "Failed to create temp dir. Exiting" >&2; exit 1 ) )"
  trap "rm -rf \"${TMPDIR}\"; exit 0" 0 1 2 3 15

  echo -e "Downloading updates"
  git clone --depth 20 -b "$BRANCH" -q https://github.com/nextcloud/nextcloudpi.git "$TMPDIR" || {
    echo "No internet connectivity"
    exit 1
  }
  cd "$TMPDIR"

  echo -e "Performing updates"
  ./update.sh && {

    VER=$( git describe --always --tags | grep -oP "v\d+\.\d+\.\d+" )
    grep -qP "v\d+\.\d+\.\d+" <<< "$VER" && {       # check format
      echo "$VER" > /usr/local/etc/ncp-version
      echo "$VER" > /var/run/.ncp-latest-version

      # write changelog
      git log --graph --oneline --decorate \
        --pretty=format:"[%D] %s" --date=short | \
        grep 'tag: v' | \
        sed '/HEAD ->\|origin/s|\[.*\(tag: v[0-9]\+\.[0-9]\+\.[0-9]\+\).*\]|[\1]|' | \
        sed 's|* \[tag: |[|' > /usr/local/etc/ncp-changelog
    }
    echo -e "NextCloudPi updated to version $VER"
  }

  cd /

  exit 
} # force to read the whole thing into memory, as its contents might change in update.sh