In reply to @emilazy:matrix.org
is there anything clever that can be done to strip location information from an attrset value to ensure that builtins.unsafeGetAttrPos returns null for it?

Hello everyone, is there a nice way to recursively convert the names of an attribute set from camalCase to snake_case?

I have the following:

{
  keycloak = {
    displayName = "Keycloak";
    clientId = "semaphore";
    clientSecret = "semaphore";
    providerUrl = "https://keycloak.example.com/realms/master";;
    redirectUrl = "https://semaphore.example.com/api/auth/oidc/keycloak/redirect";;
  };
}

And would need:

{
  keycloak = {
    display_name = "Keycloak";
    client_id = "semaphore";
    client_secret = "l3CVYbqO5zgewnFP02iN9VkQv5u6ngo2vccO8S3BwxU=";
    provider_url = "https://keycloak.example.com/realms/master";;
    redirect_url = "https://semaphore.example.com/api/auth/oidc/keycloak/redirect";;
  };
}

This could simplify my templating considerably and i wouldn't always have to keep the names and rewrite them manually.

I experimented once with the following, but I can't get the iteration to work properly.

let
  camelToSnake = str:
    builtins.foldl'
      (acc: c: acc + (
        if c == lib.toUpper c
        then "_" + lib.toLower c
        else c
      )) ""
      (lib.stringToCharacters str);

  camelCaseToSnakeCaseAttrs = attrs: lib.attrsets.mapAttrs (name: value:
    let
      SnakeCase = camelToSnake name;
    in
      if lib.types.isAttrs value then
        { inherit SnakeCase; } // { SnakeCase = renameAttrs value; }
      else
        { inherit SnakeCase; } // { SnakeCase = value; }
  ) attrs;

  exampleSet = {
    keycloak = {
      displayName = "Keycloak";
      clientId = "semaphore";
      clientSecret = "semaphore";
      providerUrl = "https://keycloak.example.com/realms/master";;
      redirectUrl = "https://semaphore.example.com/api/auth/oidc/keycloak/redirect";;
    };
  };
in

camelCaseToSnakeCaseAttrs exampleSet

In reply to @sebastian:srx.digital

Hello everyone, is there a nice way to recursively convert the names of an attribute set from camalCase to snake_case?

I have the following:

{
  keycloak = {
    displayName = "Keycloak";
    clientId = "semaphore";
    clientSecret = "semaphore";
    providerUrl = "https://keycloak.example.com/realms/master";;
    redirectUrl = "https://semaphore.example.com/api/auth/oidc/keycloak/redirect";;
  };
}

And would need:

{
  keycloak = {
    display_name = "Keycloak";
    client_id = "semaphore";
    client_secret = "l3CVYbqO5zgewnFP02iN9VkQv5u6ngo2vccO8S3BwxU=";
    provider_url = "https://keycloak.example.com/realms/master";;
    redirect_url = "https://semaphore.example.com/api/auth/oidc/keycloak/redirect";;
  };
}

This could simplify my templating considerably and i wouldn't always have to keep the names and rewrite them manually.

I experimented once with the following, but I can't get the iteration to work properly.

let
  camelToSnake = str:
    builtins.foldl'
      (acc: c: acc + (
        if c == lib.toUpper c
        then "_" + lib.toLower c
        else c
      )) ""
      (lib.stringToCharacters str);

  camelCaseToSnakeCaseAttrs = attrs: lib.attrsets.mapAttrs (name: value:
    let
      SnakeCase = camelToSnake name;
    in
      if lib.types.isAttrs value then
        { inherit SnakeCase; } // { SnakeCase = renameAttrs value; }
      else
        { inherit SnakeCase; } // { SnakeCase = value; }
  ) attrs;

  exampleSet = {
    keycloak = {
      displayName = "Keycloak";
      clientId = "semaphore";
      clientSecret = "semaphore";
      providerUrl = "https://keycloak.example.com/realms/master";;
      redirectUrl = "https://semaphore.example.com/api/auth/oidc/keycloak/redirect";;
    };
  };
in

camelCaseToSnakeCaseAttrs exampleSet

https://github.com/kaii-zen/xinomorf/blob/43092992e19fc533ef8fe67c536d0089870b9220/lib/attrsets.nix#L2
https://github.com/rummik/nixos-config/blob/f88adb6397cdbb775a1b699d866fcb43ef3611a6/users/profiles/nixvim/helpers.nix#L35

• more at
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