db: log into epoch instead of date files

Cargo.lock

@@ -844,7 +844,6 @@ version = "0.1.0"
 dependencies = [
  "anyhow 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
  "base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "chrono 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "fs2 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",

database/Cargo.toml

@@ -21,7 +21,6 @@ pathdiff = "0.1"
 idna = "0.1"
 fs2 = "0.4"
 walkdir = "2.2"
-chrono = "0.4"
 zbase32 = "0.1.2"
 
 [lib]

database/src/lib.rs

@@ -6,8 +6,6 @@ use std::str::FromStr;
 
 use openpgp::serialize::SerializeInto;
 
-use chrono::prelude::Utc;
-
 #[macro_use]
 extern crate anyhow;
 use anyhow::Result;
@@ -24,7 +22,6 @@ extern crate time;
 extern crate url;
 extern crate hex;
 extern crate walkdir;
-extern crate chrono;
 extern crate zbase32;
 
 use tempfile::NamedTempFile;
@@ -39,6 +36,7 @@ use openpgp::{
 
 pub mod types;
 use types::{Email, Fingerprint, KeyID};
+use updates::Epoch;
 
 pub mod wkd;
 pub mod sync;
@@ -347,7 +345,7 @@ pub trait Database: Sync + Send {
     }
 
     fn get_current_log_filename(&self) -> String {
-        Utc::now().format("%Y-%m-%d").to_string()
+        Epoch::current().expect("not the end of time").to_string()
     }
 
     fn get_tpk_status(&self, fpr_primary: &Fingerprint, known_addresses: &[Email]) -> Result<TpkStatus> {