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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,13 +1,110 @@ | ||
| { lib }: | ||
| { | ||
| template = file: newPath: replacements: | ||
| { pkgs, lib }: | ||
| rec { | ||
| replaceSecrets = { userConfig, resultPath, generator }: | ||
| let | ||
| templatePath = newPath + ".template"; | ||
| configWithTemplates = withReplacements userConfig; | ||
|
|
||
| nonSecretConfigFile = pkgs.writeText "${resultPath}.template" (generator configWithTemplates); | ||
|
|
||
| replacements = getReplacements userConfig; | ||
| in | ||
| replaceSecretsScript { | ||
| file = nonSecretConfigFile; | ||
| inherit resultPath replacements; | ||
| }; | ||
|
|
||
| template = file: newPath: replacements: replaceSecretsScript { inherit file replacements; resultPath = newPath; }; | ||
| replaceSecretsScript = { file, resultPath, replacements }: | ||
| let | ||
| templatePath = resultPath + ".template"; | ||
| sedPatterns = lib.strings.concatStringsSep " " (lib.attrsets.mapAttrsToList (from: to: "-e \"s|${from}|${to}|\"") replacements); | ||
| in | ||
| '' | ||
| set -euo pipefail | ||
| set -x | ||
| ln -fs ${file} ${templatePath} | ||
| rm ${newPath} || : | ||
| sed ${sedPatterns} ${templatePath} > ${newPath} | ||
| rm -f ${resultPath} | ||
| ${pkgs.gnused}/bin/sed ${sedPatterns} ${templatePath} | ||
| ${pkgs.gnused}/bin/sed ${sedPatterns} ${templatePath} > ${resultPath} | ||
| ''; | ||
|
|
||
| secretFileType = lib.types.submodule { | ||
| options = { | ||
| source = lib.mkOption { | ||
| type = lib.types.path; | ||
| description = "File containing the value."; | ||
| }; | ||
|
|
||
| transform = lib.mkOption { | ||
| type = lib.types.raw; | ||
| description = "An optional function to transform the secret."; | ||
| default = null; | ||
| example = lib.literalExpression '' | ||
| v: "prefix-$${v}-suffix" | ||
| ''; | ||
| }; | ||
| }; | ||
| }; | ||
|
|
||
| secretName = name: | ||
| "%SECRET${lib.strings.toUpper (lib.strings.concatMapStrings (s: "_" + s) name)}%"; | ||
|
|
||
| withReplacements = attrs: | ||
| let | ||
| valueOrReplacement = name: value: | ||
| if !(builtins.isAttrs value && value ? "source") | ||
| then value | ||
| else secretName name; | ||
| in | ||
| mapAttrsRecursiveCond (v: ! v ? "source") valueOrReplacement attrs; | ||
|
|
||
| getReplacements = attrs: | ||
| let | ||
| addNameField = name: value: | ||
| if !(builtins.isAttrs value && value ? "source") | ||
| then value | ||
| else value // { name = name; }; | ||
|
|
||
| secretsWithName = mapAttrsRecursiveCond (v: ! v ? "source") addNameField attrs; | ||
|
|
||
| allSecrets = collect (v: builtins.isAttrs v && v ? "source") secretsWithName; | ||
|
|
||
| t = { transform ? null, ... }: if isNull transform then x: x else transform; | ||
|
|
||
| genReplacement = secret: | ||
| lib.attrsets.nameValuePair (secretName secret.name) ((t secret) "$(cat ${toString secret.source})"); | ||
| in | ||
| lib.attrsets.listToAttrs (map genReplacement allSecrets); | ||
|
|
||
| # Inspired lib.attrsets.mapAttrsRecursiveCond but also recurses on lists. | ||
| mapAttrsRecursiveCond = | ||
| # A function, given the attribute set the recursion is currently at, determine if to recurse deeper into that attribute set. | ||
| cond: | ||
| # A function, given a list of attribute names and a value, returns a new value. | ||
| f: | ||
| # Attribute set or list to recursively map over. | ||
| set: | ||
| let | ||
| recurse = path: val: | ||
| if builtins.isAttrs val && cond val | ||
| then lib.attrsets.mapAttrs (n: v: recurse (path ++ [n]) v) val | ||
| else if builtins.isList val && cond val | ||
| then lib.lists.imap0 (i: v: recurse (path ++ [(builtins.toString i)]) v) val | ||
| else f path val; | ||
| in recurse [] set; | ||
|
|
||
| # Like lib.attrsets.collect but also recurses on lists. | ||
| collect = | ||
| # Given an attribute's value, determine if recursion should stop. | ||
| pred: | ||
| # The attribute set to recursively collect. | ||
| attrs: | ||
| if pred attrs then | ||
| [ attrs ] | ||
| else if builtins.isAttrs attrs then | ||
| lib.lists.concatMap (collect pred) (lib.attrsets.attrValues attrs) | ||
| else if builtins.isList attrs then | ||
| lib.lists.concatMap (collect pred) attrs | ||
| else | ||
| []; | ||
| } |
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