TODO (atomic transactions for /var/cache/kiki).

1 files changed, 16 insertions, 0 deletions

diff --git a/lib/Kiki.hs b/lib/Kiki.hs
index 6b4ee83..f4c8820 100644
--- a/lib/Kiki.hs
+++ b/lib/Kiki.hs
@@ -235,6 +235,22 @@ refreshCache rt rootdir = do
     -- sshspathpub0 = fromMaybe "" rootdir ++ "/etc/ssh/ssh_host_rsa_key.pub"
     -- contactipsec0 = fromMaybe "" rootdir ++ "/etc/ipsec.d/certs/%(onion).pem"
 
+    -- TODO (atomic transactions)
+    --
+    -- Use this stratagy for atomic transactions:
+    --
+    -- # cachedir=./cache
+    -- # destdir=config # relative to cachedir
+    -- # mkdir -p "$cachedir"
+    -- # cd "$cachedir"
+    -- # tempdir=$(mktemp -d --tmpdir=.) || exit 1
+    -- # touch "$tempdir"/asdf
+    -- # ln -s "$tempdir" "$tempdir".link
+    -- # mv -T "$tempdir".link "$destdir"
+    --
+    -- (before ln -s, "$tempdir" could be renamed to something meaningful)
+    --
+    -- For now, we will just rm -rf the old cache and regenerate in-place.
     readProcessWithExitCode "rm" ["-rf", mkpath "*"] "" -- clean up, in case gpg altered the keyring.
 
     flip (maybe $ warn "missing working key?") (rtWorkingKey rt) $ \wk -> do