diff options
Diffstat (limited to 'nixpkgs/nixos/lib/make-disk-image.nix')
| -rw-r--r-- | nixpkgs/nixos/lib/make-disk-image.nix | 85 |
1 files changed, 60 insertions, 25 deletions
diff --git a/nixpkgs/nixos/lib/make-disk-image.nix b/nixpkgs/nixos/lib/make-disk-image.nix index 5e86ea479d5..8aa606a56af 100644 --- a/nixpkgs/nixos/lib/make-disk-image.nix +++ b/nixpkgs/nixos/lib/make-disk-image.nix @@ -5,21 +5,32 @@ config , # The size of the disk, in megabytes. - diskSize + # if "auto" size is calculated based on the contents copied to it and + # additionalSpace is taken into account. + diskSize ? "auto" - # The files and directories to be placed in the target file system. +, # additional disk space to be added to the image if diskSize "auto" + # is used + additionalSpace ? "512M" + +, # size of the boot partition, is only used if partitionTableType is + # either "efi" or "hybrid" + bootSize ? "256M" + +, # The files and directories to be placed in the target file system. # This is a list of attribute sets {source, target} where `source' # is the file system object (regular file or directory) to be # grafted in the file system at path `target'. -, contents ? [] + contents ? [] , # Type of partition table to use; either "legacy", "efi", or "none". # For "efi" images, the GPT partition table is used and a mandatory ESP # partition of reasonable size is created in addition to the root partition. - # If `installBootLoader` is true, GRUB will be installed in EFI mode. # For "legacy", the msdos partition table is used and a single large root - # partition is created. If `installBootLoader` is true, GRUB will be - # installed in legacy mode. + # partition is created. + # For "hybrid", the GPT partition table is used and a mandatory ESP + # partition of reasonable size is created in addition to the root partition. + # Also a legacy MBR will be present. # For "none", no partition table is created. Enabling `installBootLoader` # most likely fails as GRUB will probably refuse to install. partitionTableType ? "legacy" @@ -39,11 +50,11 @@ , name ? "nixos-disk-image" -, # Disk image format, one of qcow2, qcow2-compressed, vpc, raw. +, # Disk image format, one of qcow2, qcow2-compressed, vdi, vpc, raw. format ? "raw" }: -assert partitionTableType == "legacy" || partitionTableType == "efi" || partitionTableType == "none"; +assert partitionTableType == "legacy" || partitionTableType == "efi" || partitionTableType == "hybrid" || partitionTableType == "none"; # We use -E offset=X below, which is only supported by e2fsprogs assert partitionTableType != "none" -> fsType == "ext4"; @@ -57,13 +68,15 @@ let format' = format; in let filename = "nixos." + { qcow2 = "qcow2"; + vdi = "vdi"; vpc = "vhd"; raw = "img"; - }.${format}; + }.${format} or format; rootPartition = { # switch-case legacy = "1"; efi = "2"; + hybrid = "3"; }.${partitionTableType}; partitionDiskScript = { # switch-case @@ -75,9 +88,18 @@ let format' = format; in let efi = '' parted --script $diskImage -- \ mklabel gpt \ - mkpart ESP fat32 8MiB 256MiB \ + mkpart ESP fat32 8MiB ${bootSize} \ set 1 boot on \ - mkpart primary ext4 256MiB -1 + mkpart primary ext4 ${bootSize} -1 + ''; + hybrid = '' + parted --script $diskImage -- \ + mklabel gpt \ + mkpart ESP fat32 8MiB ${bootSize} \ + set 1 boot on \ + mkpart no-fs 0 1024KiB \ + set 2 bios_grub on \ + mkpart primary ext4 ${bootSize} -1 ''; none = ""; }.${partitionTableType}; @@ -128,19 +150,6 @@ let format' = format; in let } mkdir $out - diskImage=nixos.raw - truncate -s ${toString diskSize}M $diskImage - - ${partitionDiskScript} - - ${if partitionTableType != "none" then '' - # Get start & length of the root partition in sectors to $START and $SECTORS. - eval $(partx $diskImage -o START,SECTORS --nr ${rootPartition} --pairs) - - mkfs.${fsType} -F -L ${label} $diskImage -E offset=$(sectorsToBytes $START) $(sectorsToKilobytes $SECTORS)K - '' else '' - mkfs.${fsType} -F -L ${label} $diskImage - ''} root="$PWD/root" mkdir -p $root @@ -180,10 +189,36 @@ let format' = format; in let export NIX_STATE_DIR=$TMPDIR/state nix-store --load-db < ${closureInfo}/registration + chmod 755 "$TMPDIR" echo "running nixos-install..." nixos-install --root $root --no-bootloader --no-root-passwd \ --system ${config.system.build.toplevel} --channel ${channelSources} --substituters "" + diskImage=nixos.raw + + ${if diskSize == "auto" then '' + ${if partitionTableType == "efi" || partitionTableType == "hybrid" then '' + additionalSpace=$(( ($(numfmt --from=iec '${additionalSpace}') + $(numfmt --from=iec '${bootSize}')) / 1000 )) + '' else '' + additionalSpace=$(( $(numfmt --from=iec '${additionalSpace}') / 1000 )) + ''} + diskSize=$(( $(set -- $(du -d0 $root); echo "$1") + $additionalSpace )) + truncate -s "$diskSize"K $diskImage + '' else '' + truncate -s ${toString diskSize}M $diskImage + ''} + + ${partitionDiskScript} + + ${if partitionTableType != "none" then '' + # Get start & length of the root partition in sectors to $START and $SECTORS. + eval $(partx $diskImage -o START,SECTORS --nr ${rootPartition} --pairs) + + mkfs.${fsType} -F -L ${label} $diskImage -E offset=$(sectorsToBytes $START) $(sectorsToKilobytes $SECTORS)K + '' else '' + mkfs.${fsType} -F -L ${label} $diskImage + ''} + echo "copying staging root to image..." cptofs -p ${optionalString (partitionTableType != "none") "-P ${rootPartition}"} -t ${fsType} -i $diskImage $root/* / ''; @@ -217,7 +252,7 @@ in pkgs.vmTools.runInLinuxVM ( # Create the ESP and mount it. Unlike e2fsprogs, mkfs.vfat doesn't support an # '-E offset=X' option, so we can't do this outside the VM. - ${optionalString (partitionTableType == "efi") '' + ${optionalString (partitionTableType == "efi" || partitionTableType == "hybrid") '' mkdir -p /mnt/boot mkfs.vfat -n ESP /dev/vda1 mount /dev/vda1 /mnt/boot |