Marlin/buildroot/bin/generate_version_header_for_marlin

#!/usr/bin/env bash
# generate_version_header_for_marlin

DIR="$1"
OUTFILE="$2"

BUILDATE=$(date '+%s')
DISTDATE=$(date '+%Y-%m-%d %H:%M')

BRANCH=$(git -C "${DIR}" symbolic-ref -q --short HEAD)
VERSION=$(git -C "${DIR}" describe --tags --first-parent 2>/dev/null)

# Voodoo version tag generator
if [ -z "${VERSION}" ]; then
  VERSION=$(git -C "${DIR}" describe --tags --first-parent --always 2>/dev/null)
  SHORT_BUILD_VERSION=$(echo "${VERSION}" | sed "s/-.*/${BRANCH}/")
  DETAILED_BUILD_VERSION=$(echo "${VERSION}" | sed "s/-/${BRANCH}-/")
else
  SHORT_BUILD_VERSION=$(echo "${BRANCH}")
  DETAILED_BUILD_VERSION=$(echo "${BRANCH}-${VERSION}")
fi

# Gets some misc options from their defaults
DEFAULT_MACHINE_UUID=$(awk -F'"' \
  '/#define DEFAULT_MACHINE_UUID/{ print $2 }' < "${DIR}/Version.h")
MACHINE_NAME=$(awk -F'"' \
  '/#define MACHINE_NAME/{ print $2 }' < "${DIR}/Version.h")
PROTOCOL_VERSION=$(awk -F'"' \
  '/#define PROTOCOL_VERSION/{ print $2 }' < "${DIR}/Version.h")
SOURCE_CODE_URL=$(awk -F'"' \
  '/#define SOURCE_CODE_URL/{ print $2 }' < "${DIR}/Version.h")
WEBSITE_URL=$(awk -F'"' \
  '/#define WEBSITE_URL/{ print $2 }' < "${DIR}/Version.h")

cat > "$OUTFILE" <<EOF
/**
 * THIS FILE IS AUTOMATICALLY GENERATED DO NOT MANUALLY EDIT IT.
 * IT DOES NOT GET COMMITTED TO THE REPOSITORY.
 */

#define BUILD_UNIX_DATETIME "${BUILDATE}"
#define STRING_DISTRIBUTION_DATE "${DISTDATE}"

#define SHORT_BUILD_VERSION "${SHORT_BUILD_VERSION}"
#define DETAILED_BUILD_VERSION "${DETAILED_BUILD_VERSION}"

#define PROTOCOL_VERSION "${PROTOCOL_VERSION}"
#define MACHINE_NAME "${MACHINE_NAME}"
#define SOURCE_CODE_URL "${SOURCE_CODE_URL}"
#define DEFAULT_MACHINE_UUID "${DEFAULT_MACHINE_UUID}"
#define WEBSITE_URL "${WEBSITE_URL}"
EOF