379 lines
13 KiB
Nix
379 lines
13 KiB
Nix
{ lib, config, ... }:
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let
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inherit (lib)
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types
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mkOption
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;
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fs = import ./fs.nix;
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diskListVarName = "myDisks";
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isSwap = partition: builtins.elem partition.type [fs.swap 19];
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mkDiskType = osDisk: types.submodule (
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{ config, name, ... }: {
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options = {
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id = mkOption {
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type = types.str;
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description = "The internal identifier of the disk.";
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internal = true;
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};
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wipe = mkOption {
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type = types.bool;
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description = "A value indicating whether the disk should be wiped.";
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default = !(lib.lists.any (_: _.keepExisting) (builtins.attrValues config.partitions));
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};
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deviceName = mkOption {
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type = types.nullOr types.str;
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description = "The name of the device.";
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default = if osDisk then null else name;
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};
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devicePath = mkOption {
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type =
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if osDisk
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then types.nullOr types.str
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else types.str;
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description = "The path to the device.";
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default =
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if osDisk && config.deviceName == null
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then null
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else "/dev/${config.deviceName}";
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};
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deviceScript = mkOption {
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type = types.str;
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description = "A command for loading the device path into the device variable";
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internal = true;
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};
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deviceVariable = mkOption {
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type = types.str;
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description = "The name of the variable holding the name of the disk";
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internal = true;
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};
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partitions = mkOption {
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type = types.attrsOf (types.nullOr partitionType);
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description = "The partitions of the disk.";
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default = {};
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};
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script = mkOption {
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type = types.str;
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description = "The script for formatting the disk.";
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};
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};
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config =
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let
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diskVarName = "${diskListVarName}[${config.id}]";
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diskVar = ''''${${diskVarName}}'';
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diskSelector = ''
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. ${./../../../scripts/Common/Scripts/choose-disk.sh};
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chooseDisk ${diskVarName} "Which disk do you wish to install the OS on?";
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'';
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partitions = lib.lists.sortOn
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(_: _.index)
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(builtins.filter (_: _ != null) (builtins.attrValues config.partitions));
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mkType = type:
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lib.strings.escapeShellArg (
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if builtins.isInt type
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then "${lib.trivial.toHexString type}"
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else type);
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fdiskCommand = arguments: "sudo sfdisk ${arguments}";
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fdiskScript = script: append: "echo ${script} | ${fdiskCommand "${if append then "--append" else ""} ${diskVar}"}";
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wipeScript = script: fdiskScript script false;
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appendScript = script: fdiskScript script true;
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cleanup = lib.strings.concatLines (builtins.map
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(partition: "${fdiskCommand "--delete ${diskVar} ${toString partition.index}"} | true")
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(builtins.filter (_: !_.keepExisting) partitions));
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fdiskCommands = lib.strings.concatLines (
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lib.optionals config.wipe [
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cleanup
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(wipeScript "label: gpt")
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] ++
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(builtins.concatMap (
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partition:
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let
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inherit (partition)
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format
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index
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keepExisting
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label
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sizeScript
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type
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;
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partVarName = "myPartition";
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partVar = ''''${${partVarName}}'';
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sizeOption = ''
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${sizeScript} | sed -e "s/.*[^[:space:]]/size=\0/"
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'';
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formatScripts = {
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${fs.ext4} = "mkfs.ext4 -F ${partVar}";
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${fs.swap} = "mkswap ${partVar}";
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${fs.ntfs} = "mkfs.ntfs -F ${partVar}";
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${fs.fat32} = "mkfs.fat -F 32 ${partVar}";
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};
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labelScripts = {
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${fs.ext4} = label: "e2label ${partVar} ${label}";
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${fs.swap} = label: "swaplabel ${partVar} --label ${label}";
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${fs.ntfs} = label: "ntfslabel ${partVar} ${label}";
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${fs.fat32} = label: "fatlabel ${partVar} ${label}";
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};
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create = lib.strings.concatLines [
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(appendScript "${toString index}: \"$(${sizeOption})\" type=${mkType type}")
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# Wait for partition to be detected
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''echo "Waiting for ${partVar} to appear..."''
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''
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while true;
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do
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[ -b ${partVar} ] && break;
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done;
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''
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"sudo ${formatScripts.${format}}"
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];
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fallback = ''
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if ! { ls "${diskVar}"?(p)${toString index} 2>&1; } > /dev/null
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then
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${create}
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fi
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'';
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in [
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''local diskPath="$(find -L /dev/disk/by-diskseq -samefile ${diskVar})"''
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''local ${partVarName}="$diskPath-part${toString index}"''
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(if keepExisting then fallback else create)
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"sudo ${labelScripts.${format} label}"
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])
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partitions)
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);
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fixType = lib.strings.concatLines (
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builtins.concatMap
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(partition: lib.optional
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(partition.keepExisting && !(builtins.isNull partition.type))
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''sudo sfdisk --part-type ${diskVar} ${toString partition.index} ${mkType partition.type}'')
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partitions);
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in {
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id = if osDisk then "os" else "disk-${name}";
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deviceVariable = diskVar;
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deviceScript = if osDisk && config.devicePath == null then ''
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${diskSelector}
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''
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else ''
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${diskVarName}=${config.devicePath}
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${if osDisk then ''
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. ${./../../../scripts/Common/Scripts/is-truthy.sh}
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if [ ! -b ${diskVar} ]; then
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function fallback() {
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echo "Couldn't find the specified disk \"${diskVar}\"."
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local answer
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read -p "Do you want to install the OS on another disk? [y/n] " answer
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if isTruthy "$answer"; then
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${diskSelector}
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else
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exit 1
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fi
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}
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fallback;
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fi
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'' else ""}
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'';
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script = lib.mkDefault ''
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function partition() {
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${if (!config.wipe) then cleanup else ""}
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${fdiskCommands}
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${fixType}
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}
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partition
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'';
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};
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});
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partitionType = types.submodule (
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{ name, config, ... }: {
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options = {
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index = mkOption {
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type = types.int;
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description = "The index of the partition.";
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};
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label = mkOption {
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type = types.str;
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description = "The label of the partition.";
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default = name;
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};
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keepExisting = mkOption {
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type = types.bool;
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description = "A value indicating whether the partition should be left untouched if it already exists.";
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default = false;
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};
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type = mkOption {
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type = types.nullOr (types.either types.str types.int);
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description = "The type of the partition.";
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default = null;
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};
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format = mkOption {
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type = types.enum (builtins.attrValues fs);
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description = "The file system format of the partition.";
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default =
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if (isSwap config)
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then fs.swap
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else throw("Partition format not specified.");
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};
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size = mkOption {
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type = types.nullOr types.str;
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description = "The size of the partition.";
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default = null;
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};
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sizeScript = mkOption {
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type = types.str;
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description = "A script for printing the size to the console.";
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internal = true;
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};
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useSwap = mkOption {
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type = types.bool;
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description = "A value indicating whether this partition should be used as swap.";
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default = isSwap config;
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};
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mountPoint = mkOption {
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type = types.nullOr types.str;
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description = "The mountpoint of the partition.";
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default = null;
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};
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mountOptions = mkOption {
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type = types.listOf types.str;
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description = "The options to apply to the mount.";
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default = [];
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};
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};
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config = {
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sizeScript = (
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if isSwap config
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then
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''echo "$(cat /proc/meminfo | awk -F " " '/^MemTotal/ { print $2 }' | awk '{ print int((($1 / 1024 / 1024) * 0.75) + 0.5)}')"G''
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else
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"echo ${lib.strings.escapeShellArg (toString config.size)}"
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);
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};
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}
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);
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in {
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options = {
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valhalla = {
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partition = {
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rootDir = mkOption {
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type = types.str;
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description = "The root of the installation directory to mount disks into.";
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default = "/mnt";
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};
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os = mkOption {
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type = mkDiskType true;
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description = "The partition layout of the OS disk.";
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};
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disks = mkOption {
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type = types.attrsOf (mkDiskType false);
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description = "The additional disks to format.";
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default = {};
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};
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script = mkOption {
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type = types.str;
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description = "The script for partitioning the system's disks.";
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};
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};
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};
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};
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config = {
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valhalla = {
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partition = {
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script = lib.mkDefault (
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let
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cfg = config.valhalla.partition;
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inherit (cfg) os rootDir;
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inherit (lib.strings) normalizePath;
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partPath = part: "/dev/disk/by-label/${part.label}";
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disks = ([os] ++ (builtins.attrValues cfg.disks));
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partitions = (builtins.concatMap (_: (builtins.attrValues _.partitions)) disks);
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mountScript = lib.strings.concatLines (
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builtins.concatMap
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(_: [
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''echo "Waiting for "${lib.strings.escapeShellArg (partPath _)}" to appear..."''
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''
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while true;
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do
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[ -b ${lib.strings.escapeShellArg (partPath _)} ] && break
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done
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''
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(builtins.concatStringsSep " " [
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"sudo"
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"mount"
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"--mkdir"
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(builtins.concatStringsSep " " (builtins.map (_: "-o ${_}") _.mountOptions))
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(partPath _)
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(normalizePath "/${rootDir}/${_.mountPoint}")
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])
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])
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(lib.lists.sortOn
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(_: normalizePath "/${_.mountPoint}")
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(builtins.filter (_: _.mountPoint != null) partitions)));
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swapScript = lib.strings.concatLines (
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builtins.map
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(_: "sudo swapon ${partPath _}")
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(builtins.filter (_: _.useSwap) partitions));
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in lib.strings.concatLines (
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(builtins.map (_: _.deviceScript) disks) ++ lib.optionals ((builtins.length disks) > 0) [
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". ${./../../../scripts/Common/Scripts/is-truthy.sh}"
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''echo "$(tput setaf 3)==== WARNING ====$(tput sgr0)"''
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(''echo "Continuing this script will wipe the contents of '' + (
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lib.strings.concatStringsSep ", " (builtins.map (_: "${_.deviceVariable}") (lib.lists.init disks))
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) + (if (builtins.length disks) > 1 then " and " else "") + (lib.lists.last disks).deviceVariable + ''"'')
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''read -p "Are you sure you want to continue? [y/n] " answer''
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''
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if ! isTruthy "$answer"; then
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exit 1
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fi
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''
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] ++
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(builtins.map (_: _.script) disks) ++ [
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mountScript
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swapScript
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]
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));
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};
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};
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};
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}
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