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|
{ config, lib, ... }:
let
inherit (lib)
attrValues
filter
flip
match
mkOption
recursiveUpdate
removeAttrs
removePrefix
types
;
inherit (lib.filesystem) listFilesRecursive;
cfg = config;
toRelativePath = filePath: removePrefix (toString cfg.rootDirectory + "/") (toString filePath);
handleSecretRegex =
secret:
let
secretRegexMatches = str: match secret.regex str != null;
matched = filter (filePath: secretRegexMatches (toRelativePath filePath)) secretFiles;
in
map (
path:
recursiveUpdate secret {
path = toRelativePath path;
}
) matched;
secretFiles = listFilesRecursive cfg.rootDirectory;
failedAssertions = map (x: x.message) (filter (x: !x.assertion) cfg.assertions);
assertionsMessage = "\nFailed assertions:\n${lib.concatLines (map (x: "- " + x) failedAssertions)}";
agenixSecretSubmodule = {
freeformType = lib.types.attrsOf types.anything;
options = {
publicKeys = mkOption {
type = types.listOf types.str;
defaultText = "config.recipients.default";
description = "List of public keys a given secret is encrypted for.";
};
};
};
recipientsSubmodule = {
freeformType = types.attrsOf types.str;
options = {
default = mkOption {
type = types.listOf types.str;
default = [ ];
description = "Recipetents added to secrets by default.";
};
};
};
recipientsOptionSubmodule = {
options = {
recipients = mkOption {
type = types.submodule recipientsSubmodule;
default = { };
description = "Recipetents that files will be encrypted for.";
};
};
};
secretSettingsSubmodule =
{ config, ... }:
{
imports = [ recipientsOptionSubmodule ];
options = {
recipients = mkOption {
# We only use this in the toplevel `config.recipients`
apply = flip removeAttrs [ "default" ];
};
useDefault = lib.mkEnableOption "the default recipients" // {
default = true;
};
settings = mkOption {
type = types.submodule agenixSecretSubmodule;
default = { };
description = ''
Settings for a given secret.
Loosely documented in the agenix [tutorial](https://github.com/ryantm/agenix#tutorial).
'';
};
};
# Dogfood `settings` to apply global and per-secret recipients
# Use `mkForce` to override
config = lib.mkMerge [
{
settings.publicKeys = attrValues config.recipients;
}
(lib.mkIf config.useDefault {
settings.publicKeys = cfg.recipients.default;
})
];
};
secretPathSubmodule = {
imports = [ secretSettingsSubmodule ];
options = {
path = mkOption {
type = types.nullOr types.str;
default = null;
description = "Relative path (to `config.rootDirectory`) of a secret";
};
regex = mkOption {
type = types.nullOr types.str;
default = null;
description = "A regex for a given file path relative to `config.rootDirectory`.";
};
};
};
# TODO: Re-implement when can `types.either (types.submodule ...) (types.submodule ...)` works
# It would be good to avoid the `nullOr` above and assertions below
/*
secretRegexSubmodule = {
imports = [ secretSettingsSubmodule ];
options = {
regex = mkOption {
type = types.str;
description = "A regex for a given file path relative to `config.rootDirectory`.";
};
};
};
*/
buildSubmodule = {
options = {
rules = mkOption {
type = types.attrsOf (types.submodule agenixSecretSubmodule);
readOnly = true;
description = "Final rules passed to the agenix CLi.";
};
};
};
in
{
imports = [
recipientsOptionSubmodule
<nixpkgs/nixos/modules/misc/assertions.nix>
];
options = {
rootDirectory = mkOption {
type = types.path;
description = "Root directory containing agenix secrets.";
};
secrets = mkOption {
# TODO: Use `types.listOf (types.either ...)`
type = types.listOf (types.submodule secretPathSubmodule);
default = { };
description = "Submodule describing agenix secrets.";
};
# Outputs
build = mkOption {
type = types.submodule buildSubmodule;
default = { };
apply = build: if failedAssertions != [ ] then throw assertionsMessage else build;
internal = true;
};
};
config = {
assertions = map (secret: {
assertion = secret.path != null || secret.regex != null;
message = "One of `path` or `regex` must be set";
}) cfg.secrets;
build = {
# TODO: Harvest all secrets
rules = lib.listToAttrs (
lib.concatMap (
secret:
let
normalized = if secret.regex != null then handleSecretRegex secret else [ secret ];
in
map (secret': lib.nameValuePair secret'.path secret'.settings) normalized
) cfg.secrets
);
};
};
}
|
