Initial commit: EDGE Ignition gateway docker-compose build

Custom Dockerfile-based build for an Ignition Edge gateway with
pre-baked base gwbk, module registration, and admin password
provisioning, backed by MariaDB.

gw-build/register-modules.sh

@@ -0,0 +1,88 @@
+#!/usr/bin/env bash
+set -euo pipefail
+shopt -s inherit_errexit
+
+###############################################################################
+# Retrieves third-party modules and verifies their checksums
+###############################################################################
+function main() {
+  if [ -z "${SUPPLEMENTAL_MODULES}" ]; then
+    return 0  # Silently exit if there are no supplemental modules to target
+  fi
+
+  retrieve_modules
+}
+
+###############################################################################
+# Download the modules
+###############################################################################
+function retrieve_modules() {
+  IFS=', ' read -r -a module_install_key_arr <<< "${SUPPLEMENTAL_MODULES}"
+  for module_install_key in "${module_install_key_arr[@]}"; do
+    download_url_env="SUPPLEMENTAL_${module_install_key^^}_DOWNLOAD_URL"
+    download_sha256_env="SUPPLEMENTAL_${module_install_key^^}_DOWNLOAD_SHA256"
+    if [ -n "${!download_url_env:-}" ] && [ -n "${!download_sha256_env:-}" ]; then
+      download_basename=$(basename "${!download_url_env}")
+      wget --ca-certificate=/etc/ssl/certs/ca-certificates.crt --referer https://inductiveautomation.com/* "${!download_url_env}" && \
+        [[ "notused" == "${!download_sha256_env}" ]] || echo "${!download_sha256_env}" "${download_basename}" | sha256sum -c -
+    else
+      echo "Error finding specified module ${module_install_key} in build args, aborting..."
+      exit 1
+    fi
+  done
+}
+
+###############################################################################
+# Outputs to stderr
+###############################################################################
+function debug() {
+  # shellcheck disable=SC2236
+  if [ ! -z ${verbose+x} ]; then
+    >&2 echo "  DEBUG: $*"
+  fi
+}
+
+###############################################################################
+# Print usage information
+###############################################################################
+function usage() {
+  >&2 echo "Usage: $0 -m \"space-separated modules list\""
+  >&2 echo "    -m: space-separated list of module identifiers to download"
+}
+
+# Argument Processing
+while getopts ":hvm:" opt; do
+  case "$opt" in
+  v)
+    verbose=1
+    ;;
+  m)
+    SUPPLEMENTAL_MODULES="${OPTARG}"
+    ;;
+  h)
+    usage
+    exit 0
+    ;;
+  \?)
+    usage
+    echo "Invalid option: -${OPTARG}" >&2
+    exit 1
+    ;;
+  :)
+    usage
+    echo "Invalid option: -${OPTARG} requires an argument" >&2
+    exit 1
+    ;;
+  esac
+done
+
+# shift positional args based on number consumed by getopts
+shift $((OPTIND-1))
+
+# exit on missing required args
+if [ -z "${SUPPLEMENTAL_MODULES:-}" ]; then
+  usage
+  exit 1
+fi
+
+main