setupNeo4jInitialPassword.sh

#!/usr/bin/env bash

# Sets the initial password for the local Neo4j Graph Database (https://neo4j.com/download-center/#community).

# Note: The environment variable NEO4J_INITIAL_PASSWORD needs to be set.

# Fail on any error ("-e" = exit on first error, "-o pipefail" exist on errors within piped commands)
set -o errexit -o pipefail

NEO4J_EDITION=${NEO4J_EDITION:-"community"} # Choose "community" or "enterprise"
NEO4J_VERSION=${NEO4J_VERSION:-"5.26.5"}
TOOLS_DIRECTORY=${TOOLS_DIRECTORY:-"tools"} # Get the tools directory (defaults to "tools")

# Internal constants
NEO4J_INSTALLATION_NAME="neo4j-${NEO4J_EDITION}-${NEO4J_VERSION}"
NEO4J_INSTALLATION_DIRECTORY="${TOOLS_DIRECTORY}/${NEO4J_INSTALLATION_NAME}"

## Get this "scripts" directory if not already set
# Even if $BASH_SOURCE is made for Bourne-like shells it is also supported by others and therefore here the preferred solution. 
# CDPATH reduces the scope of the cd command to potentially prevent unintended directory changes.
# This way non-standard tools like readlink aren't needed.
SCRIPTS_DIR=${SCRIPTS_DIR:-$( CDPATH=. cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P )} # Repository directory containing the shell scripts
echo "startNeo4j: SCRIPTS_DIR=$SCRIPTS_DIR"

# Check if environment variable is set
if [ -z "${NEO4J_INITIAL_PASSWORD}" ]; then
    echo "Requires environment variable NEO4J_INITIAL_PASSWORD to be set first. Use 'export NEO4J_INITIAL_PASSWORD=<your-own-password>'."
    exit 1
fi

# Check if Neo4j is installed. Exit if not.
if [ ! -d "${NEO4J_INSTALLATION_DIRECTORY}" ] ; then
    echo "Neo4j not found in ${NEO4J_INSTALLATION_DIRECTORY}. Please run setupNeo4j.sh first."
    exit 1
fi

# Print the environment variable NEO4J_HOME that is used to execute the command
echo "setupNeo4jInitialPassword: Using ${NEO4J_INSTALLATION_DIRECTORY} as NEO4J_HOME"

# Extract the first component of the version number (=major version number)
NEO4J_MAJOR_VERSION_NUMBER=$(echo "$NEO4J_VERSION" | cut -d'.' -f1)
echo "setupNeo4jInitialPassword: Neo4j version ${NEO4J_MAJOR_VERSION_NUMBER} detected"

# Include operation system function to for example detect Windows.
source "${SCRIPTS_DIR}/operatingSystemFunctions.sh"

scriptExtension=$(ifWindows ".bat" "")

# Check if the first component is greater than or equal to 5
if [[ "$NEO4J_MAJOR_VERSION_NUMBER" -ge 5 ]]; then
    echo "setupNeo4jInitialPassword: Neo4j v5 or higher used"
    # Neo4j version < 5
    # Set the initial password using a temporary NEO4J_HOME environment variable pointing to the current setup
    NEO4J_HOME="${NEO4J_INSTALLATION_DIRECTORY}"; "${NEO4J_INSTALLATION_DIRECTORY}/bin/neo4j-admin${scriptExtension}" dbms set-initial-password "${NEO4J_INITIAL_PASSWORD}"
else
    echo "setupNeo4jInitialPassword: Neo4j v4 or lower used"
    # Neo4j version >= 5
    # Set the initial password using a temporary NEO4J_HOME environment variable pointing to the current setup
    NEO4J_HOME="${NEO4J_INSTALLATION_DIRECTORY}"; "${NEO4J_INSTALLATION_DIRECTORY}/bin/neo4j-admin${scriptExtension}" set-initial-password "${NEO4J_INITIAL_PASSWORD}"
fi

echo "setupNeo4jInitialPassword: Initial password set successfully"