Embed and handle db migrations in the binary

In order to create and update the database schema the binary now
handles database migrations.

Cargo.lock

@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
 name = "anyhow"
-version = "1.0.68"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2cb2f989d18dd141ab8ae82f64d1a8cdd37e0840f73a406896cf5e99502fab61"
+checksum = "224afbd727c3d6e4b90103ece64b8d1b67fbb1973b1046c2281eed3f3803f800"
 
 [[package]]
 name = "async-trait"
@@ -191,6 +191,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "diesel_migrations"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e9ae22beef5e9d6fab9225ddb073c1c6c1a7a6ded5019d5da11d1e5c5adc34e2"
+dependencies = [
+ "diesel",
+ "migrations_internals",
+ "migrations_macros",
+]
+
 [[package]]
 name = "dirs"
 version = "4.0.0"
@@ -361,6 +372,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "hermit-abi"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "856b5cb0902c2b6d65d5fd97dfa30f9b70c7538e770b98eab5ed52d8db923e01"
+
 [[package]]
 name = "hostname"
 version = "0.3.1"
@@ -414,9 +431,9 @@ checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"
 
 [[package]]
 name = "hyper"
-version = "0.14.23"
+version = "0.14.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "034711faac9d2166cb1baf1a2fb0b60b1f277f8492fd72176c17f3515e1abd3c"
+checksum = "5e011372fa0b68db8350aa7a248930ecc7839bf46d8485577d69f117a75f164c"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -476,14 +493,14 @@ dependencies = [
 
 [[package]]
 name = "is-terminal"
-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28dfb6c8100ccc63462345b67d1bbc3679177c75ee4bf59bf29c8b1d110b8189"
+checksum = "22e18b0a45d56fe973d6db23972bf5bc46f988a4a2385deac9cc29572f09daef"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.3.0",
  "io-lifetimes",
  "rustix",
- "windows-sys 0.42.0",
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
@@ -571,6 +588,27 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
+[[package]]
+name = "migrations_internals"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c493c09323068c01e54c685f7da41a9ccf9219735c3766fbfd6099806ea08fbc"
+dependencies = [
+ "serde",
+ "toml 0.5.11",
+]
+
+[[package]]
+name = "migrations_macros"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a8ff27a350511de30cdabb77147501c36ef02e0451d957abea2f30caffb2b58"
+dependencies = [
+ "migrations_internals",
+ "proc-macro2",
+ "quote",
+]
+
 [[package]]
 name = "mime"
 version = "0.3.16"
@@ -648,7 +686,7 @@ version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0fac9e2da13b5eb447a6ce3d392f23a29d8694bff781bf03a16cd9ac8697593b"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.2.6",
  "libc",
 ]
 
@@ -817,9 +855,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.50"
+version = "1.0.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ef7d57beacfaf2d8aee5937dab7b7f28de3cb8b1828479bb5de2a7106f2bae2"
+checksum = "5d727cae5b39d21da60fa540906919ad737832fe0b1c165da3a34d6548c849d6"
 dependencies = [
  "unicode-ident",
 ]
@@ -881,16 +919,16 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.36.7"
+version = "0.36.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d4fdebc4b395b7fbb9ab11e462e20ed9051e7b16e42d24042c776eca0ac81b03"
+checksum = "f43abb88211988493c1abb44a70efa56ff0ce98f233b7b276146f1f3f7ba9644"
 dependencies = [
  "bitflags",
  "errno",
  "io-lifetimes",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.42.0",
+ "windows-sys 0.45.0",
 ]
 
 [[package]]
@@ -974,9 +1012,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.91"
+version = "1.0.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "877c235533714907a8c2464236f5c4b2a17262ef1bd71f38f35ea592c8da6883"
+checksum = "7434af0dc1cbd59268aa98b4c22c131c0584d2232f6fb166efb993e2832e896a"
 dependencies = [
  "itoa",
  "ryu",
@@ -1169,9 +1207,9 @@ dependencies = [
 
 [[package]]
 name = "tinyvec_macros"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
+checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
@@ -1204,6 +1242,15 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "toml"
+version = "0.5.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4f7f0dd8d50a853a531c426359045b1998f04219d88799810762cd4ad314234"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "toml"
 version = "0.6.0"
@@ -1414,11 +1461,12 @@ dependencies = [
  "axum",
  "clap",
  "diesel",
+ "diesel_migrations",
  "lettre",
  "serde",
  "time",
  "tokio",
- "toml",
+ "toml 0.6.0",
  "tower",
  "tower-http",
  "tracing",

Cargo.toml

@@ -16,6 +16,7 @@ tracing-subscriber = "0.3"
 time = { version = "0.3", features = ["serde-human-readable"] }
 lettre = { version = "0.10", features = ["tracing"] }
 diesel = { version = "2", features = ["postgres", "r2d2", "time"] }
+diesel_migrations = "2"
 serde = { version = "1", features = ["derive"] }
 toml = "0.6"
 clap = { version = "4", features = ["derive"] }

src/main.rs

@@ -1,10 +1,11 @@
-use anyhow::{Error, Result};
+use anyhow::{anyhow, Error, Result};
 use axum::{routing::post, Router};
 use clap::Parser;
 use diesel::{
     prelude::*,
     r2d2::{ConnectionManager, Pool},
 };
+use diesel_migrations::{embed_migrations, EmbeddedMigrations, MigrationHarness};
 use lettre::{Message, SmtpTransport, Transport};
 use std::{env, net::SocketAddr, sync::Arc, thread::JoinHandle, time::Duration};
 use time::OffsetDateTime;
@@ -22,6 +23,8 @@ use args::Args;
 use config::Config;
 use models::{NewReminder, Reminder};
 
+pub const MIGRATIONS: EmbeddedMigrations = embed_migrations!();
+
 fn get_connection_pool(config: &Config) -> Result<Pool<ConnectionManager<PgConnection>>> {
     Ok(
         Pool::builder().build(ConnectionManager::<PgConnection>::new(format!(
@@ -104,6 +107,11 @@ async fn main() -> Result<()> {
 
     let config = Config::load_config(args.config)?;
     let mut db_pool = get_connection_pool(&config)?;
+    trace!(migrations = ?db_pool
+        .get()?
+        .run_pending_migrations(MIGRATIONS)
+        .map_err(|e| anyhow!(e)), "running database migrations");
+
     let reminder = std::thread::spawn(move || -> Result<(), Error> {
         let mailer = SmtpTransport::unencrypted_localhost();
 
@@ -111,6 +119,7 @@ async fn main() -> Result<()> {
             remind(&mut db_pool, &mailer)?;
         }
     });
+
     let db_pool = get_connection_pool(&config)?;
     let app = Router::new()
         .route("/v1/reminder", post(api::create_reminder))