feat: initial support of .env files (#478)

Cargo.toml

@@ -15,7 +15,6 @@ anyhow = "1.0.79"
 async-trait = "0.1.77"
 byte-unit = "5.1.4"
 chrono = "0.4.31"
-clap = { version = "4.4.18", features = ["derive", "env"] }
 const_format = "0.2.32"
 const-hex = "1.10.0"
 csv = "1.3.0"
@@ -38,6 +37,10 @@ url = "2.5.0"
 tokio = { version = "1.35.1", features = ["rt-multi-thread", "macros"] }
 tokio-util = "0.7.10"
 
+# config
+clap = { version = "4.4.18", features = ["derive", "env"] }
+dotenvy = "0.15.7"
+
 # serialization
 serde = "1.0.193"
 serde_json = "1.0.108"

config/stratus.env.local

@@ -0,0 +1 @@
+CHAIN_ID=2008

src/lib.rs

@@ -12,9 +12,25 @@ pub fn init_global_services<T>() -> T
 where
     T: clap::Parser + WithCommonConfig + Debug,
 {
+    // load .env files
+    let binary_full_path = std::env::current_exe().unwrap();
+    let mut binary = binary_full_path.file_name().unwrap().to_str().unwrap().to_owned();
+    if binary.starts_with("test_") {
+        binary = "test-int".to_string();
+    }
+    let env = std::env::var("ENV").unwrap_or_else(|_| "local".to_string());
+    let env_filename = format!("config/{}.env.{}", binary, env);
+
+    println!("Reading ENV file: {}", env_filename);
+    let _ = dotenvy::from_filename(env_filename);
+
+    // parse configuration
     let config = T::parse();
+    println!("Parsed configuration: {:?}", config);
+
+    // init services
     infra::init_tracing();
     infra::init_metrics(config.common().metrics_histogram_kind);
-    tracing::info!(?config);
+
     config
 }