Initial commit.

.gitignore

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+# Previous component images
+partition.img.gz
+firmware.*.img.gz
+*_combined-image.img
+
+# Previous combined images
+old_images/

README.concatenateable_images

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+This directory provides installer images in the form of a device-specific
+part (containing the partition table and the system firmware) and a
+device-independent part (containing the actual installer), which can be
+unpacked and concatenated together to build a complete installer image.
+
+The device-specific part is named firmware.<board_name>.img.gz
+and the device-independent part is named partition.img.gz.
+
+In addition to providing several firmware.<board_name>.img.gz files for
+a number of devices with device-specific system firmware, we also
+provide a firmware.none.img.gz file (containing the partition table but
+without any system firmware) to provide generic installer images for
+devices for which no firmware.<board_name>.img.gz file is provided.
+
+To create a complete image from the two parts on Linux systems, you can
+use zcat as follows:
+
+  zcat firmware.<board_name>.img.gz partition.img.gz > complete_image.img
+
+On Windows systems, you have to first decompress the two parts separately,
+which can be done e.g. by using 7-Zip, and then concatenate the decompressed
+parts together by running the command
+
+  copy /b firmware.<board_name>.img + partition.img complete_image.img
+
+in a Windows CMD.exe window.

README.md

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+# Debian Installer Image Builder for RockPro64 RK3399
+
+A shell script that automates downloading and combining Debian installer images for arm64 boards, supporting both release and daily builds.
+
+## Table of Contents
+
+- [Features](#features)
+- [Requirements](#requirements)
+- [Usage](#usage)
+- [Configuration](#configuration)
+- [Output Files](#output-files)
+- [License](#license)
+
+## Features
+
+- Downloads firmware and partition images from official Debian repositories
+- Supports both release and daily build versions
+- Automatically combines downloaded images
+- Timestamp-based naming for daily builds
+- Cleans up old image files
+
+## Requirements
+
+- Bash shell
+- wget utility
+- zcat utility (part of gzip package)
+
+## Usage
+
+Save the script as `debian-image-builder.sh`, make it executable, and run:
+
+```bash
+chmod +x debian-image-builder.sh
+./debian-image-builder.sh
+```
+
+## Configuration
+
+The script uses the following variables:
+
+```bash
+BOARD=rockpro64-rk3399     # Hardware board identifier
+RELEASE=forky              # Debian release (bookworm/trixie/forky)
+IMAGE_TYPE=daily          # Type of image (daily/release)
+TIMESTAMP=$(date "+%Y%m%d%H%M%S")
+```
+
+```
+Where BOARD can be:
+* a64-olinuxino
+* firefly-rk3399
+* nanopi_neo2
+* none
+* orangepi_one_plus
+* orangepi_zero_plus2
+* pine64_plus
+* pinebook-pro-rk3399
+* pinebook
+* puma-rk3399
+* rock-pi-4-rk3399
+* rock64-rk3328
+* rockpro64-rk3399
+* teres_i
+
+## Output Files
+Based on the
+:
+- Release builds: `${BOARD}-${RELEASE}_combined-image.img`
+- Daily builds: `${BOARD}-${TIMESTAMP}-${RELEASE}_combined-image.img`
+
+Old combined images are moved to the
+ directory.
+
+## License
+[MIT License](LICENSE)
+```

debian-image-builder.sh

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+BOARD=rockpro64-rk3399
+# RELEASE=bookworm
+# RELEASE=trixie
+RELEASE=forky
+IMAGE_TYPE=daily # or release
+TIMESTAMP=$(date "+%Y%m%d%H%M%S")
+
+# remove the old image
+rm partition.img.gz
+rm firmware."${BOARD}".img.gz
+mv *_combined-image.img old_images
+
+# if statement to set urls based on IMAGE_TYPE
+if [ "${IMAGE_TYPE}" = "release" ]; then
+  BOARD_URL=http://ftp.debian.org/debian/dists/"${RELEASE}"/main/installer-arm64/current/images/netboot/SD-card-images/firmware."${BOARD}".img.gz
+  PARTITION_URL=http://ftp.debian.org/debian/dists/"${RELEASE}"/main/installer-arm64/current/images/netboot/SD-card-images/partition.img.gz
+  wget "${BOARD_URL}"
+  wget "${PARTITION_URL}"
+  zcat firmware."${BOARD}".img.gz partition.img.gz >"${BOARD}-${RELEASE}"_combined-image.img
+else
+  PARTITION_URL=https://d-i.debian.org/daily-images/arm64/daily/netboot/SD-card-images/partition.img.gz
+  BOARD_URL=https://d-i.debian.org/daily-images/arm64/daily/netboot/SD-card-images/firmware.${BOARD}.img.gz
+  wget "${PARTITION_URL}"
+  wget "${BOARD_URL}"
+  zcat firmware."${BOARD}".img.gz partition.img.gz >"${BOARD}-${TIMESTAMP}-${RELEASE}"_combined-image.img
+fi