Merge pull request #1310 from pi-hole/new/piholecheckout

Pi-hole checkout feature

advanced/Scripts/piholeCheckout.sh

@@ -0,0 +1,163 @@
+#!/usr/bin/env bash
+# Pi-hole: A black hole for Internet advertisements
+# (c) 2017 Pi-hole, LLC (https://pi-hole.net)
+# Network-wide ad blocking via your own hardware.
+#
+# Checkout other branches than master
+#
+# This file is copyright under the latest version of the EUPL.
+# Please see LICENSE file for your rights under this license.
+
+readonly PI_HOLE_FILES_DIR="/etc/.pihole"
+PH_TEST="true" source ${PI_HOLE_FILES_DIR}/automated\ install/basic-install.sh
+
+# webInterfaceGitUrl set in basic-install.sh
+# webInterfaceDir set in basic-install.sh
+# piholeGitURL set in basic-install.sh
+# is_repo() sourced from basic-install.sh
+
+fully_fetch_repo() {
+  # Add upstream branches to shallow clone
+  local directory="${1}"
+
+  cd "${directory}" || return 1
+  if is_repo "${directory}"; then
+    git remote set-branches origin '*' || return 1
+    git fetch --quiet || return 1
+  else
+    return 1
+  fi
+  return 0
+}
+
+get_available_branches(){
+  # Return available branches
+  local directory="${1}"
+  local curdir
+
+  curdir="${PWD}"
+  cd "${directory}" || return 1
+  # Get reachable remote branches
+  git remote show origin | grep 'tracked' | sed 's/tracked//;s/ //g'
+  cd "${curdir}" || return 1
+  return
+}
+
+checkout_pull_branch() {
+  # Check out specified branch
+  local directory="${1}"
+  local branch="${2}"
+  local curdir
+
+  curdir="${PWD}"
+  cd "${directory}" || return 1
+  git checkout "${branch}"
+  git pull
+  cd "${curdir}" || return 1
+  return
+}
+
+warning1() {
+  echo "::: Note that changing the branch is a severe change of your Pi-hole system."
+  echo "::: This is not supported unless one of the developers explicitly asks you to do this!"
+  read -r -p "::: Have you read and understood this? [y/N] " response
+  case ${response} in
+  [yY][eE][sS]|[yY])
+    echo "::: Continuing."
+    return 0
+    ;;
+  *)
+    echo "::: Aborting."
+    return 1
+    ;;
+  esac
+}
+
+checkout()
+{
+  local corebranches
+  local webbranches
+
+  # Avoid globbing
+  set -f
+
+  #This is unlikely
+  if ! is_repo "${PI_HOLE_FILES_DIR}" || ! is_repo "${webInterfaceDir}" ; then
+    echo "::: Critical Error: One or more Pi-Hole repos are missing from your system!"
+    echo "::: Please re-run the install script from https://github.com/pi-hole/pi-hole"
+    exit 1
+  fi
+
+  if ! warning1 ; then
+    exit 1
+  fi
+
+  echo -n "::: Fetching remote branches for Pi-hole core from ${piholeGitUrl} ... "
+  if ! fully_fetch_repo "${PI_HOLE_FILES_DIR}" ; then
+    echo "::: Fetching all branches for Pi-hole core repo failed!"
+    exit 1
+  fi
+  corebranches=($(get_available_branches "${PI_HOLE_FILES_DIR}"))
+  echo " done!"
+  echo "::: ${#corebranches[@]} branches available"
+  echo ":::"
+
+  echo -n "::: Fetching remote branches for the web interface from ${webInterfaceGitUrl} ... "
+  if ! fully_fetch_repo "${webInterfaceDir}" ; then
+    echo "::: Fetching all branches for Pi-hole web interface repo failed!"
+    exit 1
+  fi
+  webbranches=($(get_available_branches "${webInterfaceDir}"))
+  echo " done!"
+  echo "::: ${#webbranches[@]} branches available"
+  echo ":::"
+
+  if [[ "${1}" == "dev" ]] ; then
+    # Shortcut to check out development branches
+    echo "::: Shortcut \"dev\" detected - checking out development / devel branches ..."
+    echo "::: Pi-hole core"
+    checkout_pull_branch "${PI_HOLE_FILES_DIR}" "development"
+    echo "::: Web interface"
+    checkout_pull_branch "${webInterfaceDir}" "devel"
+    echo "::: done!"
+  elif [[ "${1}" == "master" ]] ; then
+    # Shortcut to check out master branches
+    echo "::: Shortcut \"master\" detected - checking out master branches ..."
+    echo "::: Pi-hole core"
+    checkout_pull_branch "${PI_HOLE_FILES_DIR}" "master"
+    echo "::: Web interface"
+    checkout_pull_branch "${webInterfaceDir}" "master"
+    echo "::: done!"
+  elif [[ "${1}" == "core" ]] ; then
+    # Have to user chosing the branch he wants
+    if ! (for e in "${corebranches[@]}"; do [[ "$e" == "${2}" ]] && exit 0; done); then
+      echo "::: Requested branch \"${2}\" is not available!"
+      echo "::: Available branches for core are:"
+      for e in "${corebranches[@]}"; do echo ":::   $e"; done
+      exit 1
+    fi
+    checkout_pull_branch "${PI_HOLE_FILES_DIR}" "${2}"
+  elif [[ "${1}" == "web" ]] ; then
+    # Have to user chosing the branch he wants
+    if ! (for e in "${webbranches[@]}"; do [[ "$e" == "${2}" ]] && exit 0; done); then
+      echo "::: Requested branch \"${2}\" is not available!"
+      echo "::: Available branches for web are:"
+      for e in "${webbranches[@]}"; do echo ":::   $e"; done
+      exit 1
+    fi
+    checkout_pull_branch "${webInterfaceDir}" "${2}"
+  else
+    echo "::: Requested option \"${1}\" is not available!"
+    exit 1
+  fi
+
+  # Force updating everything
+  echo "::: Running installer to upgrade your installation"
+  if ${PI_HOLE_FILES_DIR}/automated\ install/basic-install.sh --unattended; then
+   exit 0
+  else
+   echo "Unable to complete update, contact Pi-hole"
+   exit 1
+  fi
+}
+