#!/bin/bash
# Create a Drupal installation profile
#
# Copyright (C) 2017  Antonio Ospite <ao2@ao2.it>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

set -e

usage() {
  cat <<EOF
usage: drin $(basename "$0" .sh) [-h|--help] <title> <machine_name>

Create an installation profile from the installed project.

Options:
  -h, --help          display this usage message and exit
EOF
}

while [ $# -gt 0 ];
do
  case "$1" in
    -h|--help)
      usage
      exit 0
      ;;
    -*)
      echo "Error: Unknown option '${1}'" 1>&2
      ;;
    *)
      break
      ;;
  esac
  shift
done


{ [ "x$1" = "x" ] || [ "x$2" = "x" ]; } && { usage 1>&2; exit 1; }

PROFILE_TITLE="$1"
PROFILE_MACHINE_NAME="$2"

WEB_ROOT="${PWD}/web"

[ -d "$WEB_ROOT" ] || { echo "Aborting, run this command from the Drupal project directory." 1>&2; exit 1; }

PROJECT_ROOT="$PWD"

DRUPAL_CONSOLE="${PROJECT_ROOT}/vendor/bin/drupal"
DRUSH="${PROJECT_ROOT}/vendor/bin/drush"

[ -x "$DRUSH" ] || { echo "Aborting, '$DRUSH' not available." 1>&2; exit 1; }
[ -x "$DRUPAL_CONSOLE" ] || { echo "Aborting, '$DRUPAL_CONSOLE' not available." 1>&2; exit 1; }

PROFILE_DEST_DIR="${PROJECT_ROOT}/${PROFILE_MACHINE_NAME}"

[ -d "${PROFILE_DEST_DIR}" ] && { echo "Aborting, '${PROFILE_DEST_DIR}' already exists." 1>&2; exit 1; }

pushd "$WEB_ROOT"

CURRENT_PROFILE="$($DRUSH php-eval "echo drupal_get_profile();")"
CURRENT_PROFILE_PATH="$($DRUSH php-eval "echo drupal_get_path('profile', '${CURRENT_PROFILE}');")"

[ -d "$CURRENT_PROFILE_PATH" ] || { echo "Aborting, the current profile path is not valid." 1>&2; exit 1; }

# The list of modules and themes could also be obtained by exporting the
# configuration first and then looking at: config/install/core.extension.yml
# like this:
#
#  sed -e '/module:/,/^[^ ]/!d;//d' -e 's/^[ ]*\(.*\):.*$/\1/' config/install/core.extension.yml
#
# or
#
#  $DRUPAL_CONSOLE yaml:get:value "${PROFILE_DEST_DIR}/config/install/core.extension.yml" dependencies
#
# However getting them before exporting the configuration and generating the
# profile is cleaner.
#
ENABLED_MODULES="$($DRUSH pm-list --type=module --field=name --status=enabled --pipe | tr '\n' ',' | sed 's/,$//')"
ENABLED_THEMES="$($DRUSH pm-list --type=theme --field=name --status=enabled --pipe | tr '\n' ',' | sed 's/,$//')"

$DRUPAL_CONSOLE generate:profile \
  --profile="$PROFILE_TITLE" \
  --machine-name="$PROFILE_MACHINE_NAME" \
  --description="Drupal installation profile for $PROFILE_TITLE" \
  --dependencies="$ENABLED_MODULES" \
  --themes="$ENABLED_THEMES" \
  --profile-path="$PROJECT_ROOT" \
  --no-interaction

# Copy private code and data from the currently installed profile
pushd "$CURRENT_PROFILE_PATH"

find . -maxdepth 1 -type d ! -name "tests" -printf "%P\n" |
  while read -r dir;
  do
    [ -d "$dir" ] && cp -r "$dir" "${PROFILE_DEST_DIR}/"
  done

find . -maxdepth 1 -type f ! -name "*.info.yml" -printf "%P\n" |
  while read -r original_file;
  do
    DESTINATION_FILE="${PROFILE_DEST_DIR}/${original_file/#${CURRENT_PROFILE}/${PROFILE_MACHINE_NAME}}"
    cp "${original_file}" "$DESTINATION_FILE"
    if file "$original_file" | grep -q PHP;
    then
      sed -i "s/^function ${CURRENT_PROFILE}_/function ${PROFILE_MACHINE_NAME}_/g" "$DESTINATION_FILE"
    fi
  done

popd

# Basically do what's suggested in the "Configuration" section here:
# https://www.drupal.org/docs/8/creating-distributions/how-to-write-a-drupal-8-installation-profile
$DRUPAL_CONSOLE config:export --directory="${PROFILE_DEST_DIR}/config/install" --remove-uuid --remove-config-hash
rm "${PROFILE_DEST_DIR}/config/install/core.extension.yml"

# The reference to the core version could be removed, even though it is not strictly necessary.
find "${PROFILE_DEST_DIR}/config/install" -type f -exec sed -i -e '/^_core: {  }/d' {} \;

# Since the profile generated by `$DRUPAL_CONSOLE generate:profile` calls in
# the standard profile, some duplicated config files could be removed in the
# new profile, but that's not strictly necessary either.
#fdupes -f -1 "${WEB_ROOT}/core/profiles/standard/config/install/" "${PROFILE_DEST_DIR}/config/install/" | xargs rm

# Export the default content if the default_content module is there
if echo "$ENABLED_MODULES" | grep -q default_content;
then
  $DRUSH default-content-export-references --folder="${PROFILE_DEST_DIR}/content" node
fi

# The code copied over from the current profile may refer to the old name.
# Warn the user about that.
if [ "$PROFILE_MACHINE_NAME" != "$CURRENT_PROFILE" ];
then
  echo "The newly created profile has a name different from the current profile."
  echo "Check that the code of the created profile refers to the new profile name."
fi

popd