commit 50eb816d2994682b3269205b5cf7a4bdeb4a482c · pyrox.dev/nixpkgs

+52 -50

nixos/modules/services/backup/btrbk.nix

···

       1
        
       { config, pkgs, lib, ... }:

     

       2
        
       let

     

       3
        
         inherit (lib)

     

       0
        
       
     

       0
        
       
     

       4
        
           concatMapStringsSep

     

       5
        
           concatStringsSep

     

       6
        
           filterAttrs

     

       7
       -
           flatten

     

       8
        
           isAttrs

     

       9
       -
           isString

     

       10
        
           literalExpression

     

       11
        
           mapAttrs'

     

       12
        
           mapAttrsToList

     

       13
        
           mkIf

     

       14
        
           mkOption

     

       15
        
           optionalString

     

       16
       -
           partition

     

       17
       -
           typeOf

     

       18
        
           types

     

       19
        
           ;

     

       20
        
       

     

       21
       -
         cfg = config.services.btrbk;

     

       22
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         sshEnabled = cfg.sshAccess != [ ];

     

       23
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         serviceEnabled = cfg.instances != { };

     

       24
       -
         attr2Lines = attr:

     

       0
        
       
     

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       0
        
       
     

       25
        
           let

     

       26
       -
             pairs = mapAttrsToList (name: value: { inherit name value; }) attr;

     

       27
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             isSubsection = value:

     

       28
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               if isAttrs value then true

     

       29
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               else if isString value then false

     

       30
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               else throw "invalid type in btrbk config ${typeOf value}";

     

       31
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             sortedPairs = partition (x: isSubsection x.value) pairs;

     

       32
        
           in

     

       33
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           flatten (

     

       34
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             # non subsections go first

     

       35
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             (

     

       36
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               map (pair: [ "${pair.name} ${pair.value}" ]) sortedPairs.wrong

     

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             )

     

       38
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             ++ # subsections go last

     

       39
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             (

     

       40
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               map

     

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                 (

     

       42
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                   pair:

     

       43
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                   mapAttrsToList

     

       44
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                     (

     

       45
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                       childname: value:

     

       46
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                         [ "${pair.name} ${childname}" ] ++ (map (x: " " + x) (attr2Lines value))

     

       47
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                     )

     

       48
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                     pair.value

     

       49
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                 )

     

       50
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                 sortedPairs.right

     

       51
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             )

     

       52
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           )

     

       53
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         ;

     

       54
        
         addDefaults = settings: { backend = "btrfs-progs-sudo"; } // settings;

     

       55
       -
         mkConfigFile = settings: concatStringsSep "\n" (attr2Lines (addDefaults settings));

     

       56
       -
         mkTestedConfigFile = name: settings:

     

       57
       -
           let

     

       58
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             configFile = pkgs.writeText "btrbk-${name}.conf" (mkConfigFile settings);

     

       59
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           in

     

       60
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           pkgs.runCommand "btrbk-${name}-tested.conf" { } ''

     

       61
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             mkdir foo

     

       62
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             cp ${configFile} $out

     

       63
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             if (set +o pipefail; ${pkgs.btrbk}/bin/btrbk -c $out ls foo 2>&1 | grep $out);

     

       64
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             then

     

       65
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             echo btrbk configuration is invalid

     

       66
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             cat $out

     

       67
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             exit 1

     

       68
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             fi;

     

       0
        
       
     

       69
        
           '';

     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       70
        
       in

     

       71
        
       {

     

       72
        
         meta.maintainers = with lib.maintainers; [ oxalica ];

     
···

       196
        
             (

     

       197
        
               name: instance: {

     

       198
        
                 name = "btrbk/${name}.conf";

     

       199
       -
                 value.source = mkTestedConfigFile name instance.settings;

     

       200
        
               }

     

       201
        
             )

     

       202
        
             cfg.instances;

···

       1
        
       { config, pkgs, lib, ... }:

     

       2
        
       let

     

       3
        
         inherit (lib)

     

       4
       +
           concatLists

     

       5
       +
           concatMap

     

       6
        
           concatMapStringsSep

     

       7
        
           concatStringsSep

     

       8
        
           filterAttrs

     

       0
        
       
     

       9
        
           isAttrs

     

       0
        
       
     

       10
        
           literalExpression

     

       11
        
           mapAttrs'

     

       12
        
           mapAttrsToList

     

       13
        
           mkIf

     

       14
        
           mkOption

     

       15
        
           optionalString

     

       16
       +
           sort

     

       0
        
       
     

       17
        
           types

     

       18
        
           ;

     

       19
        
       

     

       20
       +
         # The priority of an option or section.

     

       21
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         # The configurations format are order-sensitive. Pairs are added as children of

     

       22
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         # the last sections if possible, otherwise, they start a new section.

     

       23
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         # We sort them in topological order:

     

       24
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         # 1. Leaf pairs.

     

       25
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         # 2. Sections that may contain (1).

     

       26
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         # 3. Sections that may contain (1) or (2).

     

       27
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         # 4. Etc.

     

       28
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         prioOf = { name, value }:

     

       29
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           if !isAttrs value then 0 # Leaf options.

     

       30
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           else {

     

       31
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             target = 1; # Contains: options.

     

       32
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             subvolume = 2; # Contains: options, target.

     

       33
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             volume = 3; # Contains: options, target, subvolume.

     

       34
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           }.${name} or (throw "Unknow section '${name}'");

     

       35
       +
       

     

       36
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         genConfig' = set: concatStringsSep "\n" (genConfig set);

     

       37
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         genConfig = set:

     

       38
        
           let

     

       39
       +
             pairs = mapAttrsToList (name: value: { inherit name value; }) set;

     

       40
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             sortedPairs = sort (a: b: prioOf a < prioOf b) pairs;

     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       0
        
       
     

       41
        
           in

     

       42
       +
             concatMap genPair sortedPairs;

     

       43
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         genSection = sec: secName: value:

     

       44
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           [ "${sec} ${secName}" ] ++ map (x: " " + x) (genConfig value);

     

       45
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         genPair = { name, value }:

     

       46
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           if !isAttrs value

     

       47
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           then [ "${name} ${value}" ]

     

       48
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           else concatLists (mapAttrsToList (genSection name) value);

     

       49
       +
       

     

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       50
        
         addDefaults = settings: { backend = "btrfs-progs-sudo"; } // settings;

     

       51
       +
       

     

       52
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         mkConfigFile = name: settings: pkgs.writeTextFile {

     

       53
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           name = "btrbk-${name}.conf";

     

       54
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           text = genConfig' (addDefaults settings);

     

       55
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           checkPhase = ''

     

       56
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             set +e

     

       57
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             ${pkgs.btrbk}/bin/btrbk -c $out dryrun

     

       58
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             # According to btrbk(1), exit status 2 means parse error

     

       59
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             # for CLI options or the config file.

     

       60
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             if [[ $? == 2 ]]; then

     

       61
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               echo "Btrbk configuration is invalid:"

     

       62
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               cat $out

     

       63
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               exit 1

     

       64
       +
             fi

     

       65
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             set -e

     

       66
        
           '';

     

       67
       +
         };

     

       68
       +
       

     

       69
       +
         cfg = config.services.btrbk;

     

       70
       +
         sshEnabled = cfg.sshAccess != [ ];

     

       71
       +
         serviceEnabled = cfg.instances != { };

     

       72
        
       in

     

       73
        
       {

     

       74
        
         meta.maintainers = with lib.maintainers; [ oxalica ];

     
···

       198
        
             (

     

       199
        
               name: instance: {

     

       200
        
                 name = "btrbk/${name}.conf";

     

       201
       +
                 value.source = mkConfigFile name instance.settings;

     

       202
        
               }

     

       203
        
             )

     

       204
        
             cfg.instances;

nixos/tests/all-tests.nix

···

       102
        
         brscan5 = handleTest ./brscan5.nix {};

     

       103
        
         btrbk = handleTest ./btrbk.nix {};

     

       104
        
         btrbk-no-timer = handleTest ./btrbk-no-timer.nix {};

     

       0
        
       
     

       105
        
         buildbot = handleTest ./buildbot.nix {};

     

       106
        
         buildkite-agents = handleTest ./buildkite-agents.nix {};

     

       107
        
         caddy = handleTest ./caddy.nix {};

···

       102
        
         brscan5 = handleTest ./brscan5.nix {};

     

       103
        
         btrbk = handleTest ./btrbk.nix {};

     

       104
        
         btrbk-no-timer = handleTest ./btrbk-no-timer.nix {};

     

       105
       +
         btrbk-section-order = handleTest ./btrbk-section-order.nix {};

     

       106
        
         buildbot = handleTest ./buildbot.nix {};

     

       107
        
         buildkite-agents = handleTest ./buildkite-agents.nix {};

     

       108
        
         caddy = handleTest ./caddy.nix {};

+51

nixos/tests/btrbk-section-order.nix

···

       1
       +
       # This tests validates the order of generated sections that may contain

     

       2
       +
       # other sections.

     

       3
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       # When a `volume` section has both `subvolume` and `target` children,

     

       4
       +
       # `target` must go before `subvolume`. Otherwise, `target` will become

     

       5
       +
       # a child of the last `subvolume` instead of `volume`, due to the

     

       6
       +
       # order-sensitive config format.

     

       7
       +
       #

     

       8
       +
       # Issue: https://github.com/NixOS/nixpkgs/issues/195660

     

       9
       +
       import ./make-test-python.nix ({ lib, pkgs, ... }: {

     

       10
       +
         name = "btrbk-section-order";

     

       11
       +
         meta.maintainers = with lib.maintainers; [ oxalica ];

     

       12
       +
       

     

       13
       +
         nodes.machine = { ... }: {

     

       14
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           services.btrbk.instances.local = {

     

       15
       +
             onCalendar = null;

     

       16
       +
             settings = {

     

       17
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               timestamp_format = "long";

     

       18
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               target."ssh://global-target/".ssh_user = "root";

     

       19
       +
               volume."/btrfs" = {

     

       20
       +
                 snapshot_dir = "/volume-snapshots";

     

       21
       +
                 target."ssh://volume-target/".ssh_user = "root";

     

       22
       +
                 subvolume."@subvolume" = {

     

       23
       +
                   snapshot_dir = "/subvolume-snapshots";

     

       24
       +
                   target."ssh://subvolume-target/".ssh_user = "root";

     

       25
       +
                 };

     

       26
       +
               };

     

       27
       +
             };

     

       28
       +
           };

     

       29
       +
         };

     

       30
       +
       

     

       31
       +
         testScript = ''

     

       32
       +
           machine.wait_for_unit("basic.target")

     

       33
       +
           got = machine.succeed("cat /etc/btrbk/local.conf")

     

       34
       +
           expect = """

     

       35
       +
           backend btrfs-progs-sudo

     

       36
       +
           timestamp_format long

     

       37
       +
           target ssh://global-target/

     

       38
       +
            ssh_user root

     

       39
       +
           volume /btrfs

     

       40
       +
            snapshot_dir /volume-snapshots

     

       41
       +
            target ssh://volume-target/

     

       42
       +
             ssh_user root

     

       43
       +
            subvolume @subvolume

     

       44
       +
             snapshot_dir /subvolume-snapshots

     

       45
       +
             target ssh://subvolume-target/

     

       46
       +
              ssh_user root

     

       47
       +
           """.strip()

     

       48
       +
           print(got)

     

       49
       +
           assert got == expect

     

       50
       +
         '';

     

       51
       +
       })