250 lines
7.4 KiB
Bash
Executable File
250 lines
7.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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images_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
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base_qcow2_dir="${images_dir}/base-qcow2"
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install_iso_dir="${images_dir}/install-iso"
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tools_iso_dir="${images_dir}/tools-iso"
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debian_image="${base_qcow2_dir}/debian-13-generic-amd64-20260810-2566.qcow2"
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alma_image="${base_qcow2_dir}/AlmaLinux-10-GenericCloud-10.2-20260526.0.x86_64.qcow2"
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fedora_image="${base_qcow2_dir}/Fedora-Cloud-Base-Generic-44-1.7.x86_64.qcow2"
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virtio_image="${tools_iso_dir}/virtio-win.iso"
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windows_qcow2_image="${base_qcow2_dir}/Win11_25H2_English_x64_v2.qcow2"
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windows_iso_image="${install_iso_dir}/Win11_25H2_English_x64_v2.iso"
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debian_url="${DEBIAN_IMAGE_URL:-https://cloud.debian.org/images/cloud/trixie/20260810-2566/debian-13-generic-amd64-20260810-2566.qcow2}"
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alma_url="${ALMA_IMAGE_URL:-https://repo.almalinux.org/almalinux/10/cloud/x86_64/images/AlmaLinux-10-GenericCloud-10.2-20260526.0.x86_64.qcow2}"
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fedora_url="${FEDORA_IMAGE_URL:-https://download.fedoraproject.org/pub/fedora/linux/releases/44/Cloud/x86_64/images/Fedora-Cloud-Base-Generic-44-1.7.x86_64.qcow2}"
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virtio_url="${VIRTIO_WIN_ISO_URL:-https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/virtio-win.iso}"
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debian_sha512="${DEBIAN_IMAGE_SHA512:-f6978100d8031c266d55d7815ceea7fcdeacf28e1e5834fdb9c94ac96880a054a6e6f8681c2d3b0584e0057eaf3ef7353856b85212d04134744faa9b3bb1f24f}"
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alma_sha256="${ALMA_IMAGE_SHA256:-47f2218668dd4776be140dd92fa3bea700be1766e2c7d88bdfd6a4b50f477b4d}"
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fedora_sha256="${FEDORA_IMAGE_SHA256:-28680fe5b371a5a82ebf43a31926e086a168e59949d03969c5093e7071f90b7f}"
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force_download=false
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usage() {
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cat <<EOF
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Usage: $(basename "$0") [--force] [all|debian13|almalinux10|fedora44|virtio-win] ...
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$(basename "$0") --print-path TARGET [--iso]
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Download one or more shared VM images. With no arguments, all targets are
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processed.
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--force removes existing files and partial downloads for the selected targets,
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then downloads them again from the beginning.
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--print-path prints only the absolute image path without downloading it.
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For windows11 it prints the QCOW2 path by default; add --iso for the ISO path.
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EOF
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}
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print_image_path() {
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local target="$1"
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local media="${2:-qcow2}"
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case "$target" in
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debian13) printf '%s\n' "$debian_image" ;;
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almalinux10) printf '%s\n' "$alma_image" ;;
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fedora44) printf '%s\n' "$fedora_image" ;;
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virtio-win) printf '%s\n' "$virtio_image" ;;
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windows11)
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if [[ "$media" == iso ]]; then
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printf '%s\n' "$windows_iso_image"
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else
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printf '%s\n' "$windows_qcow2_image"
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fi
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;;
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*)
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printf 'Error: path is unavailable for target: %s\n' "$1" >&2
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usage >&2
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return 2
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;;
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esac
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}
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if [[ "${1:-}" == --print-path ]]; then
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if (($# < 2 || $# > 3)); then
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printf 'Error: --print-path requires one target and optionally --iso.\n' >&2
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usage >&2
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exit 2
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fi
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if (($# == 3)) && [[ "$2" != windows11 || "$3" != --iso ]]; then
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printf 'Error: --iso is only valid after the windows11 target.\n' >&2
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usage >&2
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exit 2
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fi
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media_option="${3:-}"
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print_image_path "$2" "${media_option#--}"
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exit
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fi
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targets=()
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for argument in "$@"; do
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if [[ "$argument" == --force ]]; then
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force_download=true
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else
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targets+=("$argument")
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fi
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done
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if ((${#targets[@]} == 0)); then
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targets=(all)
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fi
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for target in "${targets[@]}"; do
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case "$target" in
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all|debian13|almalinux10|fedora44|virtio-win) ;;
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-h|--help) usage; exit 0 ;;
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*) printf 'Error: unknown download target: %s\n' "$target" >&2; usage >&2; exit 2 ;;
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esac
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done
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wants_target() {
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local requested="$1"
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local target
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for target in "${targets[@]}"; do
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[[ "$target" == all || "$target" == "$requested" ]] && return 0
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done
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return 1
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}
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mkdir -p "$base_qcow2_dir" "$install_iso_dir" "$tools_iso_dir"
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verify_file() {
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local label="$1"
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local file="$2"
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local algorithm="$3"
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local expected="$4"
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local command_name="${algorithm}sum"
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local actual
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if ! command -v "$command_name" >/dev/null 2>&1; then
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printf 'Error: %s is required to verify %s.\n' "$command_name" "$label" >&2
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return 1
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fi
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actual="$("$command_name" "$file")"
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actual="${actual%% *}"
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if [[ "$actual" != "$expected" ]]; then
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printf 'Error: %s checksum mismatch for %s.\nFile: %s\nExpected: %s\nActual: %s\n' \
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"${algorithm^^}" "$label" "$file" "$expected" "$actual" >&2
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return 1
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fi
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printf 'Verified %s checksum for %s.\n' "${algorithm^^}" "$label"
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}
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download_file() {
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local label="$1"
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local url="$2"
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local destination="$3"
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local checksum_algorithm="${4:-}"
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local expected_checksum="${5:-}"
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local partial="${destination}.part"
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local partial_url="${partial}.url"
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local downloader
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if [[ "$force_download" == true ]]; then
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printf 'Forcing a fresh download of %s.\n' "$label"
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rm -f -- "$destination" "$partial" "$partial_url"
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fi
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if [[ -s "$destination" ]]; then
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if [[ -n "$expected_checksum" ]]; then
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verify_file "$label" "$destination" "$checksum_algorithm" "$expected_checksum" || return 1
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fi
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printf '%s already exists; skipping:\n%s\n' "$label" "$destination"
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return
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fi
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printf 'Downloading %s from:\n%s\n' "$label" "$url"
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printf 'Download destination:\n%s\n' "$destination"
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if [[ -e "$partial" ]]; then
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if [[ ! -f "$partial_url" ]] || [[ "$(<"$partial_url")" != "$url" ]]; then
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printf 'Download URL changed; restarting partial download.\n'
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rm -f -- "$partial" "$partial_url"
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else
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printf 'Resuming partial download:\n%s\n' "$partial"
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fi
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fi
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printf '%s' "$url" >"$partial_url"
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if command -v curl >/dev/null 2>&1; then
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downloader=curl
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elif command -v wget >/dev/null 2>&1; then
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downloader=wget
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else
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printf 'Error: curl or wget is required.\n' >&2
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exit 1
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fi
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if [[ "$downloader" == curl ]]; then
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if ! curl --fail --location --retry 3 --continue-at - --output "$partial" "$url"; then
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if [[ -s "$partial" ]]; then
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printf 'Resume failed; restarting download from the beginning.\n'
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rm -f -- "$partial"
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curl --fail --location --retry 3 --output "$partial" "$url"
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else
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exit 1
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fi
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fi
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else
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if ! wget --tries=3 --continue --output-document="$partial" "$url"; then
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if [[ -s "$partial" ]]; then
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printf 'Resume failed; restarting download from the beginning.\n'
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rm -f -- "$partial"
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wget --tries=3 --output-document="$partial" "$url"
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else
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exit 1
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fi
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fi
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fi
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if [[ ! -s "$partial" ]]; then
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printf 'Error: downloaded file is empty: %s\n' "$partial" >&2
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exit 1
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fi
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if [[ -n "$expected_checksum" ]] && \
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! verify_file "$label" "$partial" "$checksum_algorithm" "$expected_checksum"; then
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rm -f -- "$partial" "$partial_url"
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return 1
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fi
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mv -- "$partial" "$destination"
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rm -f -- "$partial_url"
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printf 'Downloaded %s:\n%s\n' "$label" "$destination"
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}
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if wants_target debian13; then
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download_file \
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'Debian 13 cloud image' \
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"$debian_url" \
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"$debian_image" \
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sha512 \
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"$debian_sha512"
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fi
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if wants_target almalinux10; then
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download_file \
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'AlmaLinux 10 cloud image' \
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"$alma_url" \
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"$alma_image" \
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sha256 \
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"$alma_sha256"
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fi
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if wants_target fedora44; then
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download_file \
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'Fedora 44 cloud image' \
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"$fedora_url" \
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"$fedora_image" \
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sha256 \
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"$fedora_sha256"
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fi
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if wants_target virtio-win; then
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download_file \
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'VirtIO Windows tools ISO' \
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"$virtio_url" \
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"$virtio_image"
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fi
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