358 lines
9.3 KiB
Bash
Executable File
358 lines
9.3 KiB
Bash
Executable File
#!/bin/bash
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usage() {
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echo "usage: $(basename "$0") "'\' >&2
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echo " boot_iso boot_mount add_iso add_mount result_iso [for_dist]" >&2
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echo >&2
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echo "Mounts by sudo the boot_iso at directory boot_mount and add_iso at" >&2
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echo "add_mount, if not already mounted that way. Then both Debian pools" >&2
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echo "and package lists get merged and a new ISO 9660 image result_iso" >&2
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echo "is produced, which must not yet exist." >&2
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echo "If boot_iso is bootable then the new image will be bootable by the" >&2
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echo "same means." >&2
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echo "This script creates the following temporary tree and files which" >&2
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echo "must not yet exist in the current working directory:" >&2
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echo " ./merged_dists , ./merged_md5sum.txt , ./merged_REAMDE.txt" >&2
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echo " ./temp_file" >&2
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echo "The optional sixth argument for_dist should only be given if" >&2
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echo "this script refuses to work and proposes to give this argument." >&2
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echo "Exported non-empty variable MERGE_DATE enforces a particular" >&2
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echo "date string in the text which gets prepended to /README.txt ." >&2
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echo "Exported non-empty variable XORRISO overrides command xorriso," >&2
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echo "which may be needed if installed xorriso is older than 1.4.2." >&2
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echo "Example using GNU xorriso-1.5.4 instead of /usr/bin/xorriso:" >&2
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echo " export XORRISO="'$HOME'"/xorriso-1.5.4/xorriso/xorriso" >&2
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echo " $(basename "$0") debian-11.2.0-amd64-DVD-1.iso /mnt/iso1 "'\' >&2
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echo " debian-11.2.0-amd64-DVD-2.iso /mnt/iso2 merged.iso" >&2
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}
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if test "$#" -lt 5
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then
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usage
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exit 1
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fi
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BOOT_ISO="$1"
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BOOT_ISO_MOUNT="$2"
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ADD_ISO="$3"
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ADD_ISO_MOUNT="$4"
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RESULT_ISO="$5"
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# The sixth argument is optional
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FOR_DIST="$6"
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## Check arguments
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if test -e "$RESULT_ISO"
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then
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echo "--- A file '""$RESULT_ISO""' is already existing." >&2
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echo "--- Will not overwrite it by the resulting ISO image." >&2
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exit 1
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fi
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if test -e merged_dists || test -e merged_md5sum.txt || test -e temp_file \
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|| test -e merged_README.txt
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then
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echo "--- At least one of ./merged_dists, ./merged_md5sum.txt, ./temp_file," >&2
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echo "--- or merged_README.txt is already existing. Will not overwrite them." >&2
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exit 1
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fi
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if test "$BOOT_ISO" = "$RESULT_ISO" || test "$BOOT_ISO" = "$ADD_ISO" || \
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test "$ADD_ISO" = "$RESULT_ISO"
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then
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echo "--- At least two of the three given ISO image paths are equal." >&2
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echo "--- boot_iso and add_iso must exist and differ, result_iso must not exist." >&2
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usage
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exit 1
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fi
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## Mount and copy out the files which need to be changed
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do_mount_1=1
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x=$(mount | grep " $BOOT_ISO_MOUNT " | awk '{print $1}')
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if test -n "$x"
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then
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i1=$(ls -i "$x" | awk '{print $1}')
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i2=$(ls -i "$BOOT_ISO" | awk '{print $1}')
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if test "$i1" = "$i2"
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then
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do_mount_1=0
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echo "Note: Found $BOOT_ISO already mounted at $BOOT_ISO_MOUNT"
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fi
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fi
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if test "$do_mount_1" = 1
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then
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echo "Note: sudo mount $BOOT_ISO $BOOT_ISO_MOUNT"
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sudo mount "$BOOT_ISO" "$BOOT_ISO_MOUNT" || exit 3
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fi
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cp -a "$BOOT_ISO_MOUNT/dists" merged_dists
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cp -a "$BOOT_ISO_MOUNT/md5sum.txt" merged_md5sum.txt
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chmod -R u+w merged_dists
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chmod u+w merged_md5sum.txt
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do_mount_2=1
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x=$(mount | grep " $ADD_ISO_MOUNT " | awk '{print $1}')
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if test -n "$x"
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then
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i1=$(ls -i "$x" | awk '{print $1}')
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i2=$(ls -i "$ADD_ISO" | awk '{print $1}')
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if test "$i1" = "$i2"
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then
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do_mount_2=0
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echo "Note: Found $ADD_ISO already mounted at $ADD_ISO_MOUNT"
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fi
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fi
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if test "$do_mount_2" = 1
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then
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echo "Note: sudo mount $ADD_ISO $ADD_ISO_MOUNT"
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if sudo mount "$ADD_ISO" "$ADD_ISO_MOUNT"
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then
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dummy=dummy
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else
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if test "$do_mount_1"
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then
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sudo umount "$BOOT_ISO_MOUNT"
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fi
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exit 3
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fi
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fi
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## Helper functions
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# Put out the list of checksummed paths as listed in /dists/$dist/Release
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extract_checksum_paths() {
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mode=0
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cat "$1" | \
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while true
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do
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read x || break
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if test "$x" = "MD5Sum:" || test "$x" = "SHA1:" \
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|| test "$x" = "SHA256:" || test "$x" = "SHA512:"
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then
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if test "$mode" = 0
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then
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mode=1
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elif test "$mode" = 1
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then
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break
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fi
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elif test "$mode" = 1
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then
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echo "$x"
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fi
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done
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}
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# Put out the part before the first checksum field
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extract_release_head() {
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cat "$1" | \
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while true
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do
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read x || break
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if test "$x" = "MD5Sum:" || test "$x" = "SHA1:" \
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|| test "$x" = "SHA256:" || test "$x" = "SHA512:"
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then
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break
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fi
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echo "$x"
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done
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}
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## Determine which Debian release is on BOOT_ISO
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dist=
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for i in $(ls -1d "$BOOT_ISO_MOUNT"/dists/*)
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do
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if test -d "$i"
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then
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if test -L "$i"
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then
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continue
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fi
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test -n "$dist" && dist="$dist "
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dist="$dist""$(basename $i)"
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fi
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done
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if test -z "$dist"
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then
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if test -z "$FOR_DIST"
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then
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echo "--- Cannot determine Debian release from directories in /dists" >&2
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echo "--- (You may provide the release name as sixth argument)" >&2
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echo >&2
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usage
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exit 2
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fi
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elif test "$(echo "$dist" | wc -w)" -gt 1
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then
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if test -z "$FOR_DIST"
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then
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echo "--- More than one Debian release found in /dists: $dist" >&2
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echo "--- (You may provide the release name as sixth argument)" >&2
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echo >&2
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usage
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exit 2
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fi
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fi
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if test -n "$FOR_DIST"
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then
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echo "Note: Overriding release name '$dist' by '""$FOR_DIST""'" >&2
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dist="$FOR_DIST"
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fi
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if test -d "$BOOT_ISO_MOUNT"/dists/"$dist"
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then
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echo "Note: Will work along $BOOT_ISO_MOUNT"/dists/"$dist"/Release >&2
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else
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echo "--- Cannot find directory $BOOT_ISO_MOUNT"/dists/"$dist" >&2
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exit 2
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fi
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## Prepend info to /README.txt
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if test -z "$MERGE_DATE"
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then
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MERGE_DATE=$(date +'%Y%m%d-%H:%M')
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fi
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printf 'Result of a run of %s at %s\r\n' \
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"$(basename $0)" "$MERGE_DATE" >temp_file
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printf 'Package pools and Packages lists were merged.\r\n' >>temp_file
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printf 'The other files stem from the first input ISO.\r\n' >>temp_file
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printf '\r\n' >>temp_file
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printf 'Input ISO: %s\r\n' "$BOOT_ISO" >>temp_file
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head -2 "$BOOT_ISO_MOUNT"/README.txt >>temp_file
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printf '\r\n' >>temp_file
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printf 'Input ISO: %s\r\n' "$ADD_ISO" >>temp_file
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head -2 "$ADD_ISO_MOUNT"/README.txt >>temp_file
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printf '\r\n' >>temp_file
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printf '%s%s\r\n' " --------------------------------------" \
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"----------------------------------------" >>temp_file
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printf '\r\n' >>temp_file
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cat "$BOOT_ISO_MOUNT"/README.txt >>temp_file
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mv temp_file merged_README.txt
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## Merge package description files with those from "$ADD_ISO"
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# /md5sum.txt seems to be the only overall package list
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cat merged_md5sum.txt "$ADD_ISO_MOUNT"/md5sum.txt | sort >temp_file
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mv temp_file merged_md5sum.txt
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# Determine the files which are mentioned with checksum in main Release files
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path_list=$( (extract_checksum_paths merged_dists/"$dist"/Release
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extract_checksum_paths "$ADD_ISO_MOUNT"/dists/"$dist"/Release ) \
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| awk '{print $3}' | sort | uniq )
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# Merge .gz files (Release should not be merged. Unclear what others need.)
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for i in $path_list
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do
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if echo "$i" | grep -v '.gz$' >/dev/null
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then
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continue
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fi
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if test -e merged_dists/"$dist"/"$i"
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then
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if test -e "$ADD_ISO_MOUNT"/dists/"$dist"/"$i"
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then
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if test "$(gunzip <merged_dists/"$dist"/"$i" | tail -1)" = ""
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then
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empty_line=
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else
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empty_line=echo
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fi
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( gunzip <merged_dists/"$dist"/"$i"
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$empty_line
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gunzip <"$ADD_ISO_MOUNT"/dists/"$dist"/"$i" ) | gzip >temp_file
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mv temp_file merged_dists/"$dist"/"$i"
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fi
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elif test -e "$ADD_ISO_MOUNT"/dists/"$dist"/"$i"
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then
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if test -e $(dirname merged_dists/"$dist"/"$i")
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then
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dummy=dummy
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else
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mkdir -p $(dirname merged_dists/"$dist"/"$i")
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fi
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cp "$ADD_ISO_MOUNT"/dists/"$dist"/"$i" merged_dists/"$dist"/"$i"
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fi
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test -e temp_file && rm temp_file
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done
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## Update dists/"$dist"/Release
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extract_release_head merged_dists/"$dist"/Release >temp_file
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# Re-create "MD5Sum:", "SHA256:", "SHA512:" sections
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for cmd in md5sum sha1sum sha256sum sha512sum
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do
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if type "$cmd" >/dev/null
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then
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case "$cmd" in
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md5sum) echo "MD5Sum:" ;;
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sha1sum) echo "SHA1:" ;;
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sha256sum) echo "SHA256:" ;;
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sha512sum) echo "SHA512:" ;;
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esac
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for i in $path_list
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do
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file=merged_dists/"$dist"/"$i"
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if test -e "$file"
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then
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sum=$("$cmd" "$file" | awk '{print $1}')
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size=$(stat -c '%s' "$file")
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elif test -e "$file".gz
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then
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sum=$(gunzip <"$file".gz | "$cmd" | awk '{print $1}')
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size=$(gunzip <"$file".gz | wc -c)
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else
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continue
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fi
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list_path=$(echo "$file" | sed -e 's/^merged_dists\/'"$dist"'\///')
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printf ' %s %8ld %s\n' "$sum" "$size" "$list_path"
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done
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fi
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done >>temp_file
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mv temp_file merged_dists/"$dist"/Release
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## Produce the new ISO image
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if test -z "$XORRISO"
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then
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XORRISO=xorriso
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fi
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"$XORRISO" \
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-indev "$BOOT_ISO" \
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-outdev "$RESULT_ISO" \
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-map "$ADD_ISO_MOUNT"/pool /pool \
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-map merged_dists /dists \
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-map merged_md5sum.txt /md5sum.txt \
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-map merged_README.txt /README.txt \
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-chown_r 0 /dists /md5sum.txt /README.txt -- \
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-chgrp_r 0 /dists /md5sum.txt /README.txt -- \
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-chmod_r a-w /dists /md5sum.txt -- \
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-chmod_r a=r /README.txt -- \
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-boot_image any replay \
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-stdio_sync off \
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-padding included \
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-compliance no_emul_toc
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if test "$do_mount_1" = 1
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then
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sudo umount "$BOOT_ISO_MOUNT"
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fi
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if test "$do_mount_2" = 1
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then
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sudo umount "$ADD_ISO_MOUNT"
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fi
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rm -r merged_dists merged_md5sum.txt merged_README.txt
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