#!/bin/bash

# update latest NextCloudPi code from github

[[ -z "$DBG" ]] || set -$DBG

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

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

  [[ -f /.ncp-image ]] || cd "$TMPDIR"         # update locally during build

  echo -e "Performing updates"
  ./update.sh || exit $?

  cd "$TMPDIR"
  git describe --always --tags --abbrev=0 2>/dev/null | grep -qoP "v\d+\.\d+\.\d+" || git fetch --unshallow --tags
  VER=$( git describe --always --tags --abbrev=0 | grep -oP "v\d+\.\d+\.\d+" )

  # check format
  grep -qP "v\d+\.\d+\.\d+" <<< "$VER" || { echo "Error: missing version"; exit 1; }

  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"
  exit 0
} # force to read the whole thing into memory, as its contents might change in update.sh