etc: allow replacing files with known content

This enables replacing existing system files like /etc/bashrc by default
while keeping the safer behaviour for other files like /etc/passwd, etc.
that could potentially cause major problems for the system when replaced.

1 files changed, 6 insertions, 0 deletions

diff --git a/modules/lib/write-text.nix b/modules/lib/write-text.nix
index 7719a23..ddf4076 100644
--- a/modules/lib/write-text.nix
+++ b/modules/lib/write-text.nix
@@ -44,6 +44,12 @@ in
         Path of the source file.
       '';
     };
+
+    knownSha256Hashes = mkOption {
+      internal = true;
+      type = types.listOf types.str;
+      default = [];
+    };
   };
 
   config = {