142 lines
4.8 KiB
Bash
Executable File
142 lines
4.8 KiB
Bash
Executable File
#!/bin/sh
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# Notes {{{
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# Mount or extract
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# At the end, mounting or extracting the iso use the same disk space, but
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# mount require root permissions, so i choose to extract the iso.
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# }}}
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# Vars {{{
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DEBIAN_VERSION_NAME="stretch"
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DEBIAN_VERSION_NB="9.6.0"
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DEBIAN_ISO_DVD_URL="https://cdimage.debian.org/debian-cd/current/amd64/iso-dvd/debian-${DEBIAN_VERSION_NB}-amd64-DVD-1.iso"
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DEBIAN_ISO_NETINST_URL="https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-${DEBIAN_VERSION_NB}-amd64-netinst.iso"
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DEBIAN_ISO_MINI_URL="http://ftp.nl.debian.org/debian/dists/${DEBIAN_VERSION_NAME}/main/installer-amd64/current/images/netboot/mini.iso"
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TEMP_DIR=$(mktemp -d -t new-preseed-debian-iso-XXXXXX.tmp)
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TEMP_ISO_DIR="${TEMP_DIR}/extracted-iso"
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TEMP_INITRD_DIR="${TEMP_DIR}/initrd"
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DEBIAN_DL_ISO_PATH="${TEMP_DIR}/debian.iso"
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DEBIAN_PRESEED_ISO_PATH="$(dirname ${TEMP_DIR})/preseed-debian-${DEBIAN_VERSION_NB}-amd64.iso"
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# }}}
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#USE_DEBIAN_ISO="${DEBIAN_ISO_DVD_URL}"
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USE_DEBIAN_ISO="${DEBIAN_ISO_NETINST_URL}"
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#USE_DEBIAN_ISO="${DEBIAN_ISO_MINI_URL}"
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# Pre-requisites {{{
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if [ ! $(command -v 7z) ]; then
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printf '%b\n' "ERROR : Please install '7z' bin :\\nsudo apt install p7zip-full"
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exit 1
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fi
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if [ ! $(command -v gzip) ]; then
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printf '%b\n' "ERROR : Please install 'gzip' bin :\\nsudo apt install gzip"
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exit 1
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fi
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if [ ! $(command -v xorriso) ]; then
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printf '%b\n' "ERROR : Please install 'xorriso' bin :\\nsudo apt install xorriso"
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exit 1
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fi
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if [ ! -f /usr/lib/ISOLINUX/isohdpfx.bin ]; then
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printf '%b\n' "ERROR : Please install 'isolinux' package :\\nsudo apt install isolinux"
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exit 1
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fi
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# }}}
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# Test vars {{{
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case $# in
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1 )
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PRESEED_FILE="${1}"
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;;
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2 )
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PRESEED_FILE="${1}"
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USER_TEMP_DIR="${2}"
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## Check user temp dir argument
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if [ ! -d "${USER_TEMP_DIR}" ]; then
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printf '%b\n' "ERROR : The first argument should be the path to a directory."
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exit 1
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fi
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TEMP_DIR=$(mktemp -d -t debian-iso-XXXXXX.tmp -p "${USER_TEMP_DIR}")
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;;
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* )
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printf '%b\n' "Usage :"
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printf '%b\n' "$(basename ${0}) PRESEED_FILE_PATH [TEMP_DIR]"
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printf '%b\n' "-------"
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printf '%b\n' "PRESEED_FILE_PATH : Required"
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printf '%b\n' "Should be the absolut path to the preseed file you want to add to the ISO."
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printf '%b\n' "-------"
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printf '%b\n' "TEMP_DIR : Optionnal"
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printf '%b\n' "If you want to store temporary files and final ISO in a specific directory."
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printf '%b\n' "Note : This script require ISO size × 2 (eg for DVD. 3.4GB × 2)."
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printf '%b\n' "Otherwise \$TMPDIR will be used."
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;;
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esac
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## Check preseed argument
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if [ ! -f "${PRESEED_FILE}" ]; then
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printf '%b\n' "ERROR : The first argument should be the path to preseed file to add."
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exit 1
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fi
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# }}}
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# Download and extract ISO {{{
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wget -q "${USE_DEBIAN_ISO}" -O "${DEBIAN_DL_ISO_PATH}"
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command 7z x -o"${TEMP_ISO_DIR}" -- "${DEBIAN_DL_ISO_PATH}" > /dev/null
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rm -rf -- "${DEBIAN_DL_ISO_PATH}"
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## Ensure to have the write permission on the extracted folder
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chmod 0700 -- "${TEMP_ISO_DIR}"
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# }}}
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# Manage initrd.gz file {{{
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mkdir -- "${TEMP_INITRD_DIR}"
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## Exclude initrd.gz files from xen and gtk directories
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INITRD_GZ_PATH=$(find "${TEMP_ISO_DIR}" -type f \( -path '*xen*' -o -path '*gtk*' \) -prune -o -name "initrd.gz" -print -quit)
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## Copy it to a directory
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cp -- "${INITRD_GZ_PATH}" "${TEMP_INITRD_DIR}" || exit 2
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cd -- "${TEMP_INITRD_DIR}" > /dev/null || exit 2
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## Uncompress initrd.gz then delete it
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gunzip < initrd.gz | cpio --extract --quiet --make-directories --no-absolute-filenames >> /dev/null
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rm -f -- initrd.gz
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## Add preseed file
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cp -- "${PRESEED_FILE}" preseed.cfg || exit 2
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## Recompress to initrd.gz and move it back to the extracted files for ISO
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find . -not -name initrd.gz | cpio --format=newc --create --quiet | gzip --best > initrd.gz
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cp -- initrd.gz "${INITRD_GZ_PATH}" || exit 2
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## Go back to previous directory and remove no longer useful files
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cd - > /dev/null || exit 2
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rm -rf -- "${TEMP_INITRD_DIR}"
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## Fix permissions in install directory
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chmod -w -R -- $(dirname -- "${INITRD_GZ_PATH}")
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# }}}
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# Generate new md5sum {{{
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## Ensure to have the write permission on the iso folder
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chmod 0700 -- "${TEMP_ISO_DIR}"
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cd -- "${TEMP_ISO_DIR}" > /dev/null || exit 2
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## Exclude some unwanted files
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find . -follow -type f -not \( -name "md5sum.txt" -o -name 'mkisofs' -o -name 'Bootable_NoEmulation.img' -o -path '*isolinux*' \) -exec md5sum {} \; > ./md5sum.txt
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## Fix md5sum.txt permissions
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chmod -w -- md5sum.txt
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cd - > /dev/null || exit 2
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# }}}
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# Generate new bootable iso {{{
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xorriso -as mkisofs -o "${DEBIAN_PRESEED_ISO_PATH}" \
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-quiet -isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
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-c isolinux/boot.cat -b isolinux/isolinux.bin -no-emul-boot \
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-boot-load-size 4 -boot-info-table "${TEMP_ISO_DIR}"
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## Then remove temp iso directory
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chmod u+w -R -- "${TEMP_ISO_DIR}"
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rm -rf -- "${TEMP_ISO_DIR}"
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# }}}
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printf '%b\n' "The new ISO image is available : ${DEBIAN_PRESEED_ISO_PATH}"
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exit 0
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