New script to insert a preseed into an iso image

make.iso.preseed.sh

@@ -0,0 +1,109 @@
+#!/bin/sh
+# Notes {{{
+#		Mount or extract
+#			At the end, mounting or extracting the iso use the same disk space, but
+#			mount require root permissions, so i choose to extract the iso.
+# }}}
+
+# Vars {{{
+DEBIAN_VERSION_NAME="stretch"
+DEBIAN_VERSION_NB="9.6.0"
+
+DEBIAN_ISO_DVD_URL="https://cdimage.debian.org/debian-cd/current/amd64/iso-dvd/debian-${DEBIAN_VERSION_NB}-amd64-DVD-1.iso"
+DEBIAN_ISO_NETINST_URL="https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-${DEBIAN_VERSION_NB}-amd64-netinst.iso"
+DEBIAN_ISO_MINI_URL="http://ftp.nl.debian.org/debian/dists/${DEBIAN_VERSION_NAME}/main/installer-amd64/current/images/netboot/mini.iso"
+
+TEMP_DIR_ISO=$(mktemp -d -t debian-iso-XXXXXX.tmp)
+
+DEBIAN_DL_ISO_PATH="${TEMP_DIR_ISO}/debian.iso"
+
+# }}}
+
+#USE_DEBIAN_ISO="${DEBIAN_ISO_DVD_URL}"
+USE_DEBIAN_ISO="${DEBIAN_ISO_NETINST_URL}"
+#USE_DEBIAN_ISO="${DEBIAN_ISO_MINI_URL}"
+
+# Pre-requisites {{{
+if [ ! $(command -v 7z) ]; then
+	printf '%b\n' "ERROR : Please install '7z' bin :\\nsudo apt install p7zip-full"
+	exit 1
+fi
+if [ ! $(command -v gzip) ]; then
+	printf '%b\n' "ERROR : Please install 'gzip' bin :\\nsudo apt install gzip"
+	exit 1
+fi
+# }}}
+
+# Test vars {{{
+case $# in
+	1 )
+		PRESEED_FILE="${1}"
+	;;
+	2 )
+		PRESEED_FILE="${1}"
+		USER_TEMP_DIR="${2}"
+		## Check user temp dir argument
+		if [ ! -d "${USER_TEMP_DIR}" ]; then
+			printf '%b\n' "ERROR : The first argument should be the path to a directory."
+			exit 1
+		fi
+		TEMP_DIR_ISO=$(mktemp -d -t debian-iso-XXXXXX.tmp -p "${USER_TEMP_DIR}")
+	;;
+	* )
+		printf '%b\n' "Usage :"
+		printf '%b\n' "$(basename $0) PRESEED_FILE_PATH [TEMP_DIR]"
+		printf '%b\n' "-------"
+		printf '%b\n' "PRESEED_FILE_PATH : Required"
+		printf '%b\n' "Should be the absolut path to the preseed file you want to add to the ISO."
+		printf '%b\n' "-------"
+		printf '%b\n' "TEMP_DIR : Optionnal"
+		printf '%b\n' "If you want to store temporary files and final ISO in a specific directory."
+		printf '%b\n' "Note : This script require ISO size × 2 (eg for DVD. 3.4GB × 2)."
+		printf '%b\n' "Otherwise \$TMPDIR will be used."
+	;;
+esac
+
+## Check preseed argument
+if [ ! -f "${PRESEED_FILE}" ]; then
+	printf '%b\n' "ERROR : The first argument should be the path to preseed file to add."
+	exit 1
+fi
+# }}}
+
+# Download and extract ISO {{{
+wget -q "${USE_DEBIAN_ISO}" -O "${DEBIAN_DL_ISO_PATH}"
+command 7z x -o"${TEMP_DIR_ISO}" -- "${DEBIAN_DL_ISO_PATH}" > /dev/null
+rm -rf -- "${DEBIAN_DL_ISO_PATH}"
+# }}}
+# Manage initrd.gz file {{{
+## Exclude initrd.gz files from xen and gtk directories
+INITRD_GZ_PATH=$(find "${TEMP_DIR_ISO}" -type f \( -path '*xen*' -o -path '*gtk*' \) -prune -o -name "initrd.gz" -print -quit)
+
+## Uncompress initrd.gz
+gunzip -- "${INITRD_GZ_PATH}" || exit 1
+
+## Add preseed file to initrd
+INITRD_PATH=$(find "${TEMP_DIR_ISO}" -type f \( -path '*xen*' -o -path '*gtk*' \) -prune -o -name "initrd" -print -quit)
+
+echo "${PRESEED_FILE}" | cpio --quiet -H newc -o -A -F "${INITRD_PATH}"
+
+## Recompress to initrd.gz
+gzip -- "${INITRD_PATH}" || exit 1
+
+## Fix permissions in install directory
+chmod -w -R -- $(dirname -- "${INITRD_GZ_PATH}")
+# }}}
+# Generate new md5sum {{{
+cd -- "${TEMP_DIR_ISO}" || exit 2
+## Exclude some unwanted files
+find . -follow -type f -not \( -name "md5sum.txt" -o -name 'mkisofs' -o -name 'Bootable_NoEmulation.img' -o -path '*isolinux*' \) -exec md5sum {} \; > ./md5sum.txt
+cd - || exit 2
+# }}}
+# Generate new bootable iso {{{
+
+# }}}
+
+# If extract image
+#rm -rf -- "${TEMP_DIR_ISO}
+
+exit 0