feat: add semver checking to client requests (#1456)

* feat: add semver checking to client requests

This enforces that the client and the server run the same major version
in order to sync successfully.

We're using the `Atuin-Version` http header to transfer this information

If the user is not on the same MAJOR, then they will see an error like
this

> Atuin version mismatch! In order to successfully sync, the client and the server must run the same *major* version
> Client: 17.1.0
> Server: 18.1.0
> Error: could not sync records due to version mismatch

This change means two things

1. We will now only increment major versions if there is a breaking
   change for sync
2. We can now add breaking changes to sync, for any version >17.1.0.
   Clients will fail in a meaningful way.

* lint, fmt, etc

* only check for client newer than server

* Add version header to client too

1 files changed, 11 insertions, 0 deletions

diff --git a/atuin-common/src/api.rs b/atuin-common/src/api.rs
index ddcc0b09..b608937f 100644
--- a/atuin-common/src/api.rs
+++ b/atuin-common/src/api.rs
@@ -1,7 +1,18 @@
+use lazy_static::lazy_static;
+use semver::Version;
 use serde::{Deserialize, Serialize};
 use std::borrow::Cow;
 use time::OffsetDateTime;
 
+// the usage of X- has been deprecated for quite along time, it turns out
+pub static ATUIN_HEADER_VERSION: &str = "Atuin-Version";
+pub static ATUIN_CARGO_VERSION: &str = env!("CARGO_PKG_VERSION");
+
+lazy_static! {
+    pub static ref ATUIN_VERSION: Version =
+        Version::parse(ATUIN_CARGO_VERSION).expect("failed to parse self semver");
+}
+
 #[derive(Debug, Serialize, Deserialize)]
 pub struct UserResponse {
     pub username: String,