rustle publish hangs if --secret-file arg is a path

[sbillig]

E.g.

./target/debug/rustle --secret-file ~/.ssb-rustle publish --dbpath /tmp/ssb-db.sqlite3 --offsetpath /tmp/ssb-db.offset --content '{"type":"post", "text": "rustle rustle rustle"}'

This hangs indefinitely; it should fail gracefully.

--secret-file ~/.ssb-rustle/secret works fine.

[llebout]

Does not happen on Fedora 31 with Linux.

Error: ReadSecretFile { source: FileRead { path: "/home/user/.ssb-rustle", source: Os { code: 21, kind: Other, message: "Is a directory" } } }

I would file a bug against the std.

What platform are you on?