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Copy pathdisko
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executable file
·193 lines (173 loc) · 5.04 KB
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#!/usr/bin/env bash
set -euo pipefail
readonly libexec_dir="${0%/*}"
# a file with the disko config
declare disko_config
# mount was chosen as the default mode because it's less destructive
mode=mount
nix_args=()
skip_destroy_safety_check=false
# DISKO_VERSION is set by the wrapper in package.nix
DISKO_VERSION="${DISKO_VERSION:="unknown! This is a bug, please report it!"}"
>
showUsage() {
cat <<USAGE
Usage: $0 [options] disk-config.nix
or $0 [options] --flake github:somebody/somewhere#disk-config
With flakes, disk-config is discovered first under the .diskoConfigurations top level attribute
or else from the disko module of a NixOS configuration of that name under .nixosConfigurations.
Options:
* -m, --mode mode
set the mode, either destroy, format, mount, unmount, format,mount or destroy,format,mount
destroy: unmount filesystems and destroy partition tables of the selected disks
format: create partition tables, zpools, lvms, raids and filesystems if they don't exist yet
mount: mount the partitions at the specified root-mountpoint
format,mount: run format and mount in sequence
destroy,format,mount: run all three modes in sequence. Previously known as --mode disko
* -f, --flake uri
fetch the disko config relative to this flake's root
* --arg name value
pass value to nix-build. can be used to set disk-names for example
* --argstr name value
pass value to nix-build as string
* --root-mountpoint /some/other/mnt
where to mount the device tree (default: /mnt)
* --dry-run
just show the path to the script instead of running it
* --no-deps
avoid adding another dependency closure to an in-memory installer
requires all necessary dependencies to be available in the environment
* --yes-wipe-all-disks
skip the safety check for destroying partitions, useful for automation
* --debug
run with set -x
* --help
show this help
USAGE
}
abort() {
echo "aborted: $*" >&2
exit 1
}
## Main ##
[[ $# -eq 0 ]] && {
showUsage
exit 1
}
while [[ $# -gt 0 ]]; do
case "$1" in
--debug)
set -x
;;
-m | --mode)
mode=$2
shift
;;
-f | --flake)
flake=$2
shift
;;
--argstr | --arg)
nix_args+=("$1" "$2" "$3")
shift
shift
;;
-h | --help)
showUsage
exit 0
;;
--dry-run)
dry_run=y
;;
--root-mountpoint)
nix_args+=(--argstr rootMountPoint "$2")
shift
;;
--no-deps)
nix_args+=(--arg noDeps true)
;;
--yes-wipe-all-disks)
skip_destroy_safety_check=true
;;
--show-trace)
nix_args+=("$1")
;;
--version)
>
;;
*)
if [ -z ${disko_config+x} ]; then
disko_config=$1
else
showUsage
exit 1
fi
;;
esac
shift
done
if [[ "$onlyPrintVersion" = true ]]; then
echo "$DISKO_VERSION"
exit 0
fi
# Always print version information to help with debugging
echo "disko version $DISKO_VERSION"
nixBuild() {
if command -v nom-build > /dev/null && [ -t 1 ]; then
nom-build "$@"
else
nix-build "$@"
fi
}
if ! {
# Base modes
[[ $mode = "destroy" ]] || [[ $mode = "format" ]] || [[ $mode = "mount" ]] || [[ $mode = "unmount" ]] ||
# Combined modes
[[ $mode = "format,mount" ]] ||
[[ $mode = "destroy,format,mount" ]] || # Replaces --mode disko
# Legacy modes, will be removed in next major version
[[ $mode = "disko" ]] || [[ $mode = "create" ]] || [[ $mode = "zap_create_mount" ]] ;
}; then
abort 'mode must be one of "destroy", "format", "mount", "destroy,format,mount" or "format,mount"'
fi
if [[ -n "${flake+x}" ]]; then
if [[ $flake =~ ^(.*)\#([^\#\"]*)$ ]]; then
flake="${BASH_REMATCH[1]}"
flakeAttr="${BASH_REMATCH[2]}"
fi
if [[ -z "${flakeAttr-}" ]]; then
echo "Please specify the name of the NixOS configuration to be installed, as a URI fragment in the flake-uri."
echo "For example, to use the output diskoConfigurations.foo from the flake.nix, append \"#foo\" to the flake-uri."
exit 1
fi
if [[ -e "$flake" ]]; then
flake="$(realpath "$flake")"
fi
nix_args+=("--arg" "flake" "\"$flake\"")
nix_args+=("--argstr" "flakeAttr" "$flakeAttr")
nix_args+=(--extra-experimental-features flakes)
elif [[ -n "${disko_config+x}" ]] && [[ -e "$disko_config" ]]; then
nix_args+=("--arg" "diskoFile" "$(realpath "$disko_config")")
else
abort "disko config must be an existing file or flake must be set"
fi
# The "--impure" is still pure, as the path is within the nix store.
script=$(nixBuild "${libexec_dir}"/cli.nix \
--no-out-link \
--impure \
--argstr mode "$mode" \
"${nix_args[@]}"
)
command=("$(echo "$script"/bin/*)")
if [[ $mode = "destroy,format,mount" && $skip_destroy_safety_check = true ]]; then
command+=("--yes-wipe-all-disks")
fi
# Legacy modes don't support --yes-wipe-all-disks and are not in `$script/bin`
if [[ $mode = "disko" ]] || [[ $mode = "create" ]] || [[ $mode = "zap_create_mount" ]] ; then
command=("$script")
fi
if [[ -n "${dry_run+x}" ]]; then
echo "${command[@]}"
else
exec "${command[@]}"
fi
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