feat: get rid of hardcoded UTC offset

Thanks to the new `chrono` support in `tracing-subscriber`.

- https://docs.rs/tracing-subscriber/latest/tracing_subscriber/fmt/time/struct.ChronoLocal.html
- tokio-rs/tracing#2690

.example.env

@@ -5,5 +5,3 @@ APP_BASE_URL='127.0.0.1'
 PORT='8001'
 SCHEMA_LOCATION='tests/schema.graphql'
 DATABASE_URL='postgres://durin:SpeakFriendAndEnter@127.0.0.1:5432/tin'
-# Indonesia is UTC+7
-UTC_OFFSET_HOUR='7'

Cargo.toml

@@ -38,7 +38,7 @@ sqlx = { version = "0.7.3", features = ["runtime-tokio-rustls", "postgres", "uui
 
 # Logging
 tracing = "0.1.40"
-tracing-subscriber = { version = "0.3.18", features = ["env-filter", "time", "local-time"] }
+tracing-subscriber = { version = "0.3.18", features = ["env-filter", "chrono"] }
 
 # Configurations
 dotenv = "0.15.0"

docker-compose.local.yml

@@ -14,7 +14,6 @@ services:
       - APP_ENV=dev
       - APP_BASE_URL=0.0.0.0
       - PORT=8001
-      - UTC_OFFSET_HOUR=7
       - DATABASE_URL=postgres://durin:SpeakFriendAndEnter@db/tin
 
   db:

src/config.rs

@@ -12,7 +12,6 @@ const ENV_HTTP_PORT: &str = "PORT";
 const ENV_DATABASE_URL: &str = "DATABASE_URL";
 const ENV_DATABASE_POOL_SIZE: &str = "DATABASE_POOL_SIZE";
 const ENV_SCHEMA_LOCATION: &str = "SCHEMA_LOCATION";
-const ENV_UTC_OFFSET_HOUR: &str = "UTC_OFFSET_HOUR";
 
 const POSTGRES_SCHEME: &str = "postgres";
 
@@ -21,7 +20,6 @@ pub struct Config {
     pub env: Env,
     pub base_url: String,
     pub schema_location: Option<String>,
-    pub utc_offset_hour: i8,
     pub http: Http,
     pub database: Database,
 }
@@ -99,9 +97,6 @@ impl Config {
             .parse::<Env>()?;
         let base_url =
             std::env::var(ENV_APP_BASE_URL).map_err(|_| env_not_found(ENV_APP_BASE_URL))?;
-        let utc_offset_hour =
-            std::env::var(ENV_UTC_OFFSET_HOUR).map_err(|_| env_not_found(ENV_UTC_OFFSET_HOUR))?;
-        let utc_offset_hour: i8 = utc_offset_hour.parse()?;
 
         // GraphQL
         let schema_location = match std::env::var(ENV_SCHEMA_LOCATION) {
@@ -133,7 +128,6 @@ impl Config {
         let mut config = Self {
             base_url,
             schema_location,
-            utc_offset_hour,
             env,
             http,
             database,

src/domain/meta/entities.rs

@@ -12,5 +12,4 @@ pub struct Config {
     pub env: String,
     pub base_url: String,
     pub port: u16,
-    pub utc_offset_hour: i8,
 }

src/domain/meta/model/mod.rs

@@ -13,5 +13,4 @@ pub struct Config {
     pub env: String,
     pub base_url: String,
     pub port: u16,
-    pub utc_offset_hour: i8,
 }

src/domain/meta/service/get_meta.rs

@@ -7,7 +7,6 @@ impl Service {
             env: self.config.env.to_string(),
             base_url: self.config.base_url.clone(),
             port: self.config.http.port,
-            utc_offset_hour: self.config.utc_offset_hour,
         };
         let meta = entities::Meta {
             build: option_env!("VCS_REVISION").unwrap_or("unknown").to_string(),

src/logger.rs

@@ -1,7 +1,6 @@
-use time::format_description::well_known::Rfc3339;
 use tracing_subscriber::{
     filter::{self},
-    fmt::{layer, time::OffsetTime},
+    fmt::{layer, time::ChronoLocal},
     prelude::*,
     registry,
 };
@@ -21,13 +20,9 @@ pub fn init(config: &Config) -> Result<(), crate::Error> {
         .add_directive("hyper=warn".parse()?)
         .add_directive("reqwest=warn".parse()?);
 
-    let utc_offset_hour = config.utc_offset_hour;
     let fmt_layer = layer()
         .with_target(true)
-        .with_timer(OffsetTime::new(
-            time::UtcOffset::from_hms(utc_offset_hour, 0, 0).unwrap_or(time::UtcOffset::UTC),
-            Rfc3339,
-        ))
+        .with_timer(ChronoLocal::rfc_3339())
         .with_filter(env_filter);
 
     registry().with(fmt_layer).init();

tests/schema.graphql

@@ -3,7 +3,6 @@ type Config {
 	env: String!
 	baseUrl: String!
 	port: Int!
-	utcOffsetHour: Int!
 }
 
 input CreateUserInput {