572 lines
19 KiB
Bash
Executable file
572 lines
19 KiB
Bash
Executable file
#!/bin/sh
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# Copyright (c) 2022 pangea.org Associació Pangea - Coordinadora Comunicació per a la Cooperació
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# SPDX-License-Identifier: AGPL-3.0-or-later
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# Description: This program attaches workbench-script to a ISO
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# debug
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set -x
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# exit on failure
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set -e
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# fail and exit when it cannot substitute a variable
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set -u
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# inspired from Ander in https://code.ungleich.ch/ungleich-public/cdist/issues/4
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# this is a way to reuse a function used inside and outside of chroot
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# this function is used both in shell and chroot
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decide_if_update_str="$(cat <<END
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decide_if_update() {
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if [ ! -d /var/lib/apt/lists ] \
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|| [ -n "\$( find /etc/apt -newer /var/lib/apt/lists )" ] \
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|| [ ! -f /var/cache/apt/pkgcache.bin ] \
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|| [ "\$( stat --format %Y /var/cache/apt/pkgcache.bin )" -lt "\$( date +%s -d '-1 day' )" ]
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then
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if [ -d /var/lib/apt/lists ]; then
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\${SUDO} touch /var/lib/apt/lists
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fi
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apt_opts="-o Acquire::AllowReleaseInfoChange::Suite=true -o Acquire::AllowReleaseInfoChange::Version=true"
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# apt update could have problems such as key expirations, proceed anyway
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\${SUDO} apt-get "\${apt_opts}" update || true
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fi
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}
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END
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)"
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create_iso() {
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# Copy kernel and initramfs
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vmlinuz="$(ls -1v "${ISO_PATH}"/chroot/boot/vmlinuz-* | tail -n 1)"
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initrd="$(ls -1v "${ISO_PATH}"/chroot/boot/initrd.img-* | tail -n 1)"
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${SUDO} cp ${vmlinuz} "${ISO_PATH}"/staging/live/vmlinuz
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${SUDO} cp ${initrd} "${ISO_PATH}"/staging/live/initrd
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# Creating ISO
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iso_path=""${ISO_PATH}"/${iso_name}.iso"
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# 0x14 is FAT16 Hidden FAT16 <32, this is the only format detected in windows10 automatically when using a persistent volume of 10 MB
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${SUDO} xorrisofs \
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-verbose \
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-iso-level 3 \
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-o "${iso_path}" \
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-full-iso9660-filenames \
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-volid "${iso_name}" \
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-isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
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-eltorito-boot \
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isolinux/isolinux.bin \
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-no-emul-boot \
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-boot-load-size 4 \
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-boot-info-table \
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--eltorito-catalog isolinux/isolinux.cat \
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-eltorito-alt-boot \
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-e /EFI/boot/efiboot.img \
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-no-emul-boot \
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-isohybrid-gpt-basdat \
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-append_partition 2 0xef "${ISO_PATH}"/staging/EFI/boot/efiboot.img \
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-append_partition 3 0x14 "${rw_img_path}" \
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"${ISO_PATH}/staging"
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printf "\n\n Image generated in ${iso_path}\n\n"
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}
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isolinux_boot() {
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isolinuxcfg_str="$(cat <<END
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UI vesamenu.c32
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MENU TITLE Boot Menu
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DEFAULT linux
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TIMEOUT 10
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MENU RESOLUTION 640 480
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MENU COLOR border 30;44 #40ffffff #a0000000 std
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MENU COLOR title 1;36;44 #9033ccff #a0000000 std
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MENU COLOR sel 7;37;40 #e0ffffff #20ffffff all
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MENU COLOR unsel 37;44 #50ffffff #a0000000 std
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MENU COLOR help 37;40 #c0ffffff #a0000000 std
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MENU COLOR timeout_msg 37;40 #80ffffff #00000000 std
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MENU COLOR timeout 1;37;40 #c0ffffff #00000000 std
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MENU COLOR msg07 37;40 #90ffffff #a0000000 std
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MENU COLOR tabmsg 31;40 #30ffffff #00000000 std
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LABEL linux
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MENU LABEL workbench
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MENU DEFAULT
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KERNEL /live/vmlinuz
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APPEND initrd=/live/initrd boot=live net.ifnames=0 biosdevname=0 persistence
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LABEL linux
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MENU LABEL workbench (nomodeset)
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MENU DEFAULT
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KERNEL /live/vmlinuz
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APPEND initrd=/live/initrd boot=live net.ifnames=0 biosdevname=0 persistence nomodeset
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END
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)"
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# TIMEOUT 60 means 6 seconds :)
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${SUDO} tee "${ISO_PATH}/staging/isolinux/isolinux.cfg" <<EOF
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${isolinuxcfg_str}
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EOF
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${SUDO} cp /usr/lib/ISOLINUX/isolinux.bin "${ISO_PATH}/staging/isolinux/"
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${SUDO} cp /usr/lib/syslinux/modules/bios/* "${ISO_PATH}/staging/isolinux/"
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}
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grub_boot() {
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grubcfg_str="$(cat <<END
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search --set=root --file /${iso_name}
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set default="0"
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set timeout=1
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# If X has issues finding screens, experiment with/without nomodeset.
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menuentry "workbench" {
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linux (\$root)/live/vmlinuz boot=live net.ifnames=0 biosdevname=0 persistence
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initrd (\$root)/live/initrd
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}
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menuentry "workbench (nomodeset)" {
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linux (\$root)/live/vmlinuz boot=live net.ifnames=0 biosdevname=0 persistence nomodeset
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initrd (\$root)/live/initrd
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}
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END
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)"
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${SUDO} tee "${ISO_PATH}/staging/boot/grub/grub.cfg" <<EOF
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${grubcfg_str}
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EOF
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${SUDO} tee "${ISO_PATH}/tmp/grub-standalone.cfg" <<EOF
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search --set=root --file /${iso_name}
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set prefix=(\$root)/boot/grub/
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configfile /boot/grub/grub.cfg
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EOF
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${SUDO} cp -r /usr/lib/grub/x86_64-efi/* "${ISO_PATH}/staging/boot/grub/x86_64-efi/"
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${SUDO} grub-mkstandalone \
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--format=x86_64-efi \
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--output="${ISO_PATH}"/tmp/bootx64.efi \
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--locales="" \
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--fonts="" \
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"boot/grub/grub.cfg=${ISO_PATH}/tmp/grub-standalone.cfg"
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# prepare uefi secureboot files
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# bootx64 is the filename is looking to boot, and we force it to be the shimx64 file for uefi secureboot
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# shimx64 redirects to grubx64 -> src https://askubuntu.com/questions/874584/how-does-secure-boot-actually-work
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# grubx64 looks for a file in /EFI/debian/grub.cfg -> src src https://unix.stackexchange.com/questions/648089/uefi-grub-not-finding-config-file
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${SUDO} cp /usr/lib/shim/shimx64.efi.signed /tmp/bootx64.efi
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${SUDO} cp /usr/lib/grub/x86_64-efi-signed/grubx64.efi.signed /tmp/grubx64.efi
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${SUDO} cp "${ISO_PATH}/tmp/grub-standalone.cfg" "${ISO_PATH}/staging/EFI/debian/grub.cfg"
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(
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cd "${ISO_PATH}/staging/EFI/boot"
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${SUDO} dd if=/dev/zero of=efiboot.img bs=1M count=20
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${SUDO} mkfs.vfat efiboot.img
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${SUDO} mmd -i efiboot.img efi efi/boot
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${SUDO} mcopy -vi efiboot.img \
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/tmp/bootx64.efi \
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/tmp/grubx64.efi \
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::efi/boot/
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)
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}
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create_boot_system() {
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# both boots disable predicted names -> src https://michlstechblog.info/blog/linux-disable-assignment-of-new-names-for-network-interfaces/
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isolinux_boot
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grub_boot
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}
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compress_chroot_dir() {
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# Faster squashfs when debugging -> src https://forums.fedoraforum.org/showthread.php?284366-squashfs-wo-compression-speed-up
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if [ "${DEBUG:-}" ]; then
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DEBUG_SQUASHFS_ARGS='-noI -noD -noF -noX'
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fi
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# why squashfs -> https://unix.stackexchange.com/questions/163190/why-do-liveusbs-use-squashfs-and-similar-file-systems
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# noappend option needed to avoid this situation -> https://unix.stackexchange.com/questions/80447/merging-preexisting-source-folders-in-mksquashfs
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${SUDO} mksquashfs \
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"${ISO_PATH}/chroot" \
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"${ISO_PATH}/staging/live/filesystem.squashfs" \
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${DEBUG_SQUASHFS_ARGS:-} \
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-noappend -e boot
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}
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create_persistence_partition() {
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# persistent partition
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rw_img_name="workbench_vfat.img"
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rw_img_path="${ISO_PATH}/staging/${rw_img_name}"
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if [ ! -f "${rw_img_path}" ] || [ "${DEBUG:-}" ] || [ "${FORCE:-}" ]; then
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persistent_volume_size_MB=100
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${SUDO} dd if=/dev/zero of="${rw_img_path}" bs=1M count=${persistent_volume_size_MB}
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${SUDO} mkfs.vfat "${rw_img_path}"
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# generate structure on persistent partition
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tmp_rw_mount="/tmp/${rw_img_name}"
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${SUDO} umount -f -l "${tmp_rw_mount}" >/dev/null 2>&1 || true
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mkdir -p "${tmp_rw_mount}"
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${SUDO} mount "$(pwd)/${rw_img_path}" "${tmp_rw_mount}"
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${SUDO} mkdir -p "${tmp_rw_mount}"
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if [ ! -f "settings.ini" ]; then
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${SUDO} cp -v settings.ini.example settings.ini
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echo "WARNING: settings.ini was not there, settings.ini.example was copied, this only happens once"
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fi
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${SUDO} cp -v settings.ini "${tmp_rw_mount}/settings.ini"
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${SUDO} umount "${tmp_rw_mount}"
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uuid="$(blkid "${rw_img_path}" | awk '{ print $3; }')"
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# no fail on boot -> src https://askubuntu.com/questions/14365/mount-an-external-drive-at-boot-time-only-if-it-is-plugged-in/99628#99628
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# use tee instead of cat -> src https://stackoverflow.com/questions/2953081/how-can-i-write-a-heredoc-to-a-file-in-bash-script/17093489#17093489
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${SUDO} tee "${ISO_PATH}/chroot/etc/fstab" <<END
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# next three lines originally appeared on fstab, we preserve them
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# UNCONFIGURED FSTAB FOR BASE SYSTEM
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overlay / overlay rw 0 0
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tmpfs /tmp tmpfs nosuid,nodev 0 0
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${uuid} /mnt vfat defaults,nofail 0 0
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END
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fi
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# src https://manpages.debian.org/testing/open-infrastructure-system-boot/persistence.conf.5.en.html
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echo "/ union" | ${SUDO} tee "${ISO_PATH}/chroot/persistence.conf"
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}
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chroot_netdns_conf_str="$(cat<<END
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###################
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# configure network
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mkdir -p /etc/network/
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cat > /etc/network/interfaces <<END2
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auto lo
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iface lo inet loopback
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auto eth0
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iface eth0 inet dhcp
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END2
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###################
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# configure dns
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cat > /etc/resolv.conf <<END2
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nameserver 8.8.8.8
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nameserver 1.1.1.1
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END2
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###################
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# configure hosts
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cat > /etc/hosts <<END2
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127.0.0.1 localhost workbench
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::1 localhost ip6-localhost ip6-loopback
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ff02::1 ip6-allnodes
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ff02::2 ip6-allrouters
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END2
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END
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)"
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# thanks https://wiki.debian.org/Keyboard
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chroot_kbd_conf_str="$(cat<<END
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chroot_kbd_conf() {
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###################
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# configure keyboard
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cat > /etc/default/keyboard <<END2
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# KEYBOARD CONFIGURATION FILE
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# generated by deploy-workbench.sh
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# Consult the keyboard(5) manual page.
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XKBMODEL="pc105"
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XKBLAYOUT="\${CUSTOM_LANG}"
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BACKSPACE="guess"
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END2
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}
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END
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)"
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prepare_app() {
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# prepare app during prepare_chroot_env
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workbench_dir="${ISO_PATH}/chroot/opt/workbench"
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${SUDO} mkdir -p "${workbench_dir}"
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${SUDO} cp workbench-script.py "${workbench_dir}/"
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${SUDO} cp -arp locale "${workbench_dir}/"
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# TODO uncomment when we have dependencies again
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#${SUDO} cp requirements.txt "${workbench_dir}/"
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# startup script execution
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cat > "${ISO_PATH}/chroot/root/.profile" <<END
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if [ -f /tmp/workbench_lock ]; then
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return 0
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else
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touch /tmp/workbench_lock
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fi
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set -x
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stty -echo # Do not show what we type in terminal so it does not meddle with our nice output
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dmesg -n 1 # Do not report *useless* system messages to the terminal
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# detect pxe env
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nfs_host="\$(df -hT | grep nfs | cut -f1 -d: | head -n1)"
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if [ "\${nfs_host}" ]; then
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mount --bind /run/live/medium /mnt
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# debian live nfs path is readonly, do a trick
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# to make snapshots subdir readwrite
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mount -v \${nfs_host}:/snapshots /run/live/medium/snapshots
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# reload mounts on systemd
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systemctl daemon-reload
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fi
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# clearly specify the right working directory, used in the python script as os.getcwd()
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cd /mnt
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#pipenv run python /opt/workbench/workbench-script.py --config /mnt/settings.ini
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# works meanwhile this project is vanilla python
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python /opt/workbench/workbench-script.py --config /mnt/settings.ini
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stty echo
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set +x
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END
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#TODO add some useful commands
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cat > "${ISO_PATH}/chroot/root/.bash_history" <<END
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poweroff
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END
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# sequence of commands to install app in function run_chroot
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install_app_str="$(cat<<END
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echo 'Install requirements'
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# Install debian requirements
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apt-get install -y --no-install-recommends \
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sudo locales keyboard-configuration console-setup qrencode \
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python-is-python3 python3 python3-dev python3-pip pipenv \
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dmidecode smartmontools hwinfo pciutils lshw nfs-common inxi < /dev/null
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# Install lshw B02.19 utility using backports (DEPRECATED in Debian 12)
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#apt install -y -t ${VERSION_CODENAME}-backports lshw < /dev/null
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echo 'Install sanitize requirements'
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# Install sanitize debian requirements
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apt-get install -y --no-install-recommends \
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hdparm nvme-cli < /dev/null
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# TODO uncomment when we have dependencies again
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# pipenv run pip install -r /opt/workbench/requirements.txt
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END
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)"
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}
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run_chroot() {
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# non interactive chroot -> src https://stackoverflow.com/questions/51305706/shell-script-that-does-chroot-and-execute-commands-in-chroot
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# stop apt-get from greedily reading the stdin -> src https://askubuntu.com/questions/638686/apt-get-exits-bash-script-after-installing-packages/638754#638754
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${SUDO} chroot ${ISO_PATH}/chroot <<CHROOT
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set -x
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set -e
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echo workbench > /etc/hostname
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# check what linux images are available on the system
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# Figure out which Linux Kernel you want in the live environment.
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# apt-cache search linux-image
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backports_path="/etc/apt/sources.list.d/backports.list"
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if [ ! -f "\${backports_path}" ]; then
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backports_repo='deb http://deb.debian.org/debian ${VERSION_CODENAME}-backports main contrib'
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printf "\${backports_repo}" > "\${backports_path}"
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fi
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# this env var confuses sudo detection
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unset SUDO_USER
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${detect_user_str}
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detect_user
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# Installing packages
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${decide_if_update_str}
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decide_if_update
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apt-get install -y --no-install-recommends \
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linux-image-amd64 \
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live-boot \
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systemd-sysv
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# Install app
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${install_app_str}
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# thanks src https://serverfault.com/questions/362903/how-do-you-set-a-locale-non-interactively-on-debian-ubuntu
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export LANG=${LANG}
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export LC_ALL=${LANG}
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echo "${MYLOCALE}" > /etc/locale.gen
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# Generate the locale
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locale-gen
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# feeds /etc/default/locale for the shell env var
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update-locale LANG=${LANG} LC_ALL=${LANG}
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# this is a high level command that does locale-gen and update-locale altogether
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# but it is too interactive
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#dpkg-reconfigure --frontend=noninteractive locales
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# DEBUG
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locale -a
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# Autologin root user
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# src https://wiki.archlinux.org/title/getty#Automatic_login_to_virtual_console
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mkdir -p /etc/systemd/system/getty@tty1.service.d/
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cat > /etc/systemd/system/getty@tty1.service.d/override.conf <<END2
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[Service]
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ExecStart=
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ExecStart=-/sbin/agetty --autologin root --noclear %I \$TERM
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END2
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systemctl enable getty@tty1.service
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# other debian utilities
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apt-get install -y --no-install-recommends \
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iproute2 iputils-ping ifupdown isc-dhcp-client \
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fdisk parted \
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curl openssh-client \
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less \
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jq \
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nano vim-tiny \
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< /dev/null
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${chroot_netdns_conf_str}
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CUSTOM_LANG=${CUSTOM_LANG}
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${chroot_kbd_conf_str}
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chroot_kbd_conf
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# Set up root user
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# this is the root password
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# Method3: Use echo
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# src https://www.systutorials.com/changing-linux-users-password-in-one-command-line/
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printf '${root_passwd}\n${root_passwd}' | passwd root
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# general cleanup if production image
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if [ -z "${DEBUG:-}" ]; then
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apt-get clean < /dev/null
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fi
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# cleanup bash history
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history -c
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CHROOT
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}
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prepare_chroot_env() {
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CUSTOM_LANG="${CUSTOM_LANG:-es}"
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case "${CUSTOM_LANG}" in
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es)
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export LANG="es_ES.UTF-8"
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export MYLOCALE="${LANG} UTF-8"
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;;
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en)
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export LANG="en_US.UTF-8"
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;;
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*)
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echo "ERROR: CUSTOM_LANG not supported. Available: es"
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exit 1
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esac
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# version of debian the bootstrap is going to build
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# if no VERSION_CODENAME is specified we assume that the bootstrap is going to
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# be build with the same version of debian being executed because some files
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# are copied from our root system
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if [ -z "${VERSION_CODENAME:-}" ]; then
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. /etc/os-release
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echo "TAKING OS-RELEASE FILE"
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if [ ! "${ID}" = "debian" ]; then
|
|
echo "ERROR: ubuntu detected, then you are enforced to specify debian variant"
|
|
echo " use for example \`VERSION_CODENAME='bookworm'\` or similar"
|
|
exit 1
|
|
fi
|
|
fi
|
|
|
|
chroot_path="${ISO_PATH}/chroot"
|
|
if [ ! -d "${chroot_path}" ]; then
|
|
${SUDO} debootstrap --arch=amd64 --variant=minbase ${VERSION_CODENAME} ${ISO_PATH}/chroot http://deb.debian.org/debian/
|
|
${SUDO} chown -R "${USER}:" ${ISO_PATH}/chroot
|
|
fi
|
|
|
|
prepare_app
|
|
}
|
|
|
|
|
|
# thanks https://willhaley.com/blog/custom-debian-live-environment/
|
|
install_requirements() {
|
|
# Install requirements
|
|
eval "${decide_if_update_str}" && decide_if_update
|
|
image_deps='debootstrap
|
|
squashfs-tools
|
|
xorriso
|
|
mtools
|
|
dosfstools'
|
|
# secureboot:
|
|
# -> extra src https://wiki.debian.org/SecureBoot/
|
|
# -> extra src https://wiki.debian.org/SecureBoot/VirtualMachine
|
|
# -> extra src https://wiki.debian.org/GrubEFIReinstall
|
|
bootloader_deps='isolinux
|
|
syslinux-efi
|
|
grub-pc-bin
|
|
grub-efi-amd64-bin
|
|
ovmf
|
|
grub-efi-amd64-signed'
|
|
${SUDO} apt-get install -y \
|
|
${image_deps} \
|
|
${bootloader_deps}
|
|
}
|
|
|
|
# thanks https://willhaley.com/blog/custom-debian-live-environment/
|
|
create_base_dirs() {
|
|
mkdir -p "${ISO_PATH}"
|
|
mkdir -p "${ISO_PATH}/staging/EFI/boot"
|
|
mkdir -p "${ISO_PATH}/staging/boot/grub/x86_64-efi"
|
|
mkdir -p "${ISO_PATH}/staging/isolinux"
|
|
mkdir -p "${ISO_PATH}/staging/live"
|
|
mkdir -p "${ISO_PATH}/tmp"
|
|
# usb name
|
|
${SUDO} touch "${ISO_PATH}/staging/${iso_name}"
|
|
|
|
# for uefi secure boot grub config file
|
|
mkdir -p "${ISO_PATH}/staging/EFI/debian"
|
|
}
|
|
|
|
# this function is used both in shell and chroot
|
|
detect_user_str="$(cat <<END
|
|
detect_user() {
|
|
userid="\$(id -u)"
|
|
# detect non root user without sudo
|
|
if [ ! "\${userid}" = 0 ] && id \${USER} | grep -qv sudo; then
|
|
echo "ERROR: this script needs root or sudo permissions (current user is not part of sudo group)"
|
|
exit 1
|
|
# detect user with sudo or already on sudo src https://serverfault.com/questions/568627/can-a-program-tell-it-is-being-run-under-sudo/568628#568628
|
|
elif [ ! "\${userid}" = 0 ] || [ -n "\${SUDO_USER}" ]; then
|
|
SUDO='sudo'
|
|
# jump to current dir where the script is so relative links work
|
|
cd "\$(dirname "\${0}")"
|
|
# working directory to build the iso
|
|
ISO_PATH="iso"
|
|
# detect pure root
|
|
elif [ "\${userid}" = 0 ]; then
|
|
SUDO=''
|
|
ISO_PATH="/opt/workbench"
|
|
fi
|
|
}
|
|
END
|
|
)"
|
|
|
|
main() {
|
|
|
|
if [ "${DEBUG:-}" ]; then
|
|
VERSION_ISO='debug'
|
|
else
|
|
VERSION_ISO='production'
|
|
fi
|
|
iso_name="workbench_${VERSION_ISO}"
|
|
hostname='workbench'
|
|
root_passwd='workbench'
|
|
|
|
eval "${detect_user_str}" && detect_user
|
|
|
|
create_base_dirs
|
|
|
|
install_requirements
|
|
|
|
prepare_chroot_env
|
|
|
|
run_chroot
|
|
|
|
create_persistence_partition
|
|
|
|
compress_chroot_dir
|
|
|
|
create_boot_system
|
|
|
|
create_iso
|
|
}
|
|
|
|
main "${@}"
|