Script that takes cores from Drupal config and tries to create them via Solr REST API

scripts---solr---init_cores.sh

#!/usr/bin/env bash

# Return error codes if they happen.
set -e

# Working directory.
# Helper to let you run the install script from anywhere.
currentscriptpath () {
  SOURCE="${BASH_SOURCE[0]}"
  # resolve $SOURCE until the file is no longer a symlink
  while [ -h "$SOURCE" ]; do

    DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
    SOURCE="$(readlink "$SOURCE")"
    # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
    [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE"
  done
  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
  echo $DIR
}

# Preparing vars.
SCRIPT_PATH=$(currentscriptpath)
APP_ROOT="$SCRIPT_PATH/../.."
CONF_PATH="$APP_ROOT/config/sync"

# Loading settings files.
source $APP_ROOT/scripts/settings.sh
if [ -f $APP_ROOT/.env ]; then
  source $APP_ROOT/.env
fi

# More vars.
SOLR_URL="http://${SOLR_HOST:=localhost}:${SOLR_PORT:=8983}${SOLR_PATH:=/solr}"

# Test Solr URL.
TEST_RES=$(curl -sIN "$SOLR_URL/" | head -n 1 | awk '{print $2}')
echo -n "Trying to reach ${SOLR_URL}/ to check connectivity... "
if [[ "$TEST_RES" != "200" ]]; then
  echo "Error ${TEST_RES}"
  exit 1
else
  echo "OK"
fi

# Get all the cores we need for our application.
CORES=$(grep core $CONF_PATH/search_api.server.* | sed -e 's/^.*core: //' | sort | uniq)

for CORE in $CORES; do
  echo -n "Trying to create the '${CORE}' Solr core... "

  # Check core existence.
  PING_URL="$SOLR_URL/${CORE}/admin/ping"
  PING_RES=$(curl -sIN ${PING_URL} | head -n 1 | awk '{print $2}')
  if [[ "$PING_RES" != "200" ]]; then

    # Create core.
    CREATE_URL="$SOLR_URL/admin/cores?action=CREATE&name=${CORE}&configSet=mfr&instanceDir=${CORE}"
    CREATE_RES=$(curl -sIN ${CREATE_URL} | head -n 1 | awk '{print $2}')
    if [[ "$CREATE_RES" == "200" ]]; then
      echo "OK, created"
    else
      echo "Error (${CREATE_RES})"
      echo "Used URL: ${CREATE_URL}"
      exit 1
    fi

  else
    echo "OK, already exists"
  fi

done