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impermanence: cleanup some previously verbose code

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colin
2022-12-31 09:09:51 +00:00
parent 53a0b621d8
commit c1890ce82b
1 changed files with 24 additions and 25 deletions
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49
modules/impermanence/default.nix
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@@ -25,13 +25,6 @@ let
# };
}
);
# TODO: flatten these!
home-dir-defaults = {
relativeTo = "/home/colin";
};
sys-dir-defaults = {
relativeTo = "";
};
# turn a path into a name suitable for systemd
cleanName = utils.escapeSystemdPath;
@@ -46,15 +39,16 @@ let
joinPathAbs = comps: "/" + (builtins.concatStringsSep "/" comps);
concatPaths = paths: joinPathAbs (builtins.concatLists (builtins.map (p: splitPath p) paths));
dirOptions = defaults: types.submodule {
# options for a single mountpoint / persistence
dirEntry = types.submodule {
options = {
directory = mkOption {
type = types.str;
};
encryptedClearOnBoot = mkOption {
default = false;
type = types.bool;
};
directory = mkOption {
type = types.str;
};
user = mkOption {
type = types.nullOr types.str;
default = null;
@@ -69,25 +63,21 @@ let
};
};
};
mkDirsOption = defaults: mkOption {
default = [];
type = types.listOf (types.coercedTo types.str (d: { directory = d; }) (dirOptions defaults));
# apply = map (d: if isString d then { directory = d; } else d);
};
# allow "bar/baz" as shorthand for { directory = "bar/baz"; }
coercedDirEntry = types.coercedTo types.str (d: { directory = d; }) dirEntry;
# expand user options with more context
ingestDirOption = defaults: opt: {
ingestDirEntry = relativeTo: opt: {
inherit (opt) user group mode;
directory = concatPaths [ defaults.relativeTo opt.directory ];
directory = concatPaths [ relativeTo opt.directory ];
## helpful context
store = builtins.addErrorContext ''while ingestDirOption on ${opt.directory} with attrs ${builtins.concatStringsSep " " (attrNames opt)}''
(getStore opt);
store = getStore opt;
};
ingestDirOptions = defaults: opts: builtins.map (ingestDirOption defaults) opts;
ingested-home-dirs = ingestDirOptions home-dir-defaults cfg.home-dirs;
ingested-sys-dirs = ingestDirOptions sys-dir-defaults cfg.dirs;
ingestDirEntries = relativeTo: opts: builtins.map (ingestDirEntry relativeTo) opts;
ingested-home-dirs = ingestDirEntries "/home/colin" cfg.home-dirs;
ingested-sys-dirs = ingestDirEntries "/" cfg.dirs;
ingested-dirs = ingested-home-dirs ++ ingested-sys-dirs;
in
{
@@ -101,8 +91,16 @@ in
type = types.bool;
description = "define / to be a tmpfs. make sure to mount some other device to /nix";
};
sane.impermanence.home-dirs = mkDirsOption home-dir-defaults;
sane.impermanence.dirs = mkDirsOption sys-dir-defaults;
sane.impermanence.home-dirs = mkOption {
default = [];
type = types.listOf coercedDirEntry;
description = "list of directories (and optional config) to persist to disk, relative to the user's home ~";
};
sane.impermanence.dirs = mkOption {
default = [];
type = types.listOf coercedDirEntry;
description = "list of directories (and optional config) to persist to disk, relative to the fs root /";
};
};
imports = [
@@ -203,6 +201,7 @@ in
dir-service = config.sane.fs."${opt.directory}".service;
backing-service = config.sane.fs."${backing-path}".service;
# pass through the perm/mode overrides
dir-opts = {
user = lib.mkIf (opt.user != null) opt.user;
group = lib.mkIf (opt.group != null) opt.group;