added env_logger

Cargo.lock

@@ -102,6 +102,17 @@ dependencies = [
  "tungstenite",
 ]
 
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.0.1"
@@ -330,6 +341,19 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "env_logger"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54532e3223c5af90a6a757c90b5c5521564b07e5e7a958681bcd2afad421cdcd"
+dependencies = [
+ "atty",
+ "humantime",
+ "log",
+ "regex",
+ "termcolor",
+]
+
 [[package]]
 name = "fake-simd"
 version = "0.1.2"
@@ -592,6 +616,12 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "494b4d60369511e7dea41cf646832512a94e542f68bb9c49e54518e0f468eb47"
 
+[[package]]
+name = "humantime"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c1ad908cc71012b7bea4d0c53ba96a8cba9962f048fa68d143376143d863b7a"
+
 [[package]]
 name = "hyper"
 version = "0.13.8"
@@ -1143,6 +1173,7 @@ dependencies = [
  "chrono-tz",
  "custom_error",
  "dotenv",
+ "env_logger",
  "lazy_static",
  "log",
  "num-integer",
@@ -1529,6 +1560,15 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb6bfa289a4d7c5766392812c0a1f4c1ba45afa1ad47803c11e1f407d846d75f"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.21"
@@ -1968,6 +2008,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"

Cargo.toml

@@ -13,6 +13,7 @@ sqlx = { version = "0.3.5", default-features = false, features = ["runtime-tokio
 regex = "1.3.9"
 async-trait = "0.1.36"
 log = "0.4.11"
+env_logger = "0.8.1"
 chrono = "0.4"
 chrono-tz = "0.5"
 lazy_static = "1.4.0"

src/main.rs

@@ -36,6 +36,8 @@ use crate::{
 
 use serenity::futures::TryFutureExt;
 
+use log::info;
+
 struct SQLPool;
 
 impl TypeMapKey for SQLPool {
@@ -56,6 +58,8 @@ impl TypeMapKey for FrameworkCtx {
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    env_logger::init();
+
     dotenv()?;
 
     let token = env::var("DISCORD_TOKEN").expect("Missing DISCORD_TOKEN from environment");
@@ -137,7 +141,45 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
         data.insert::<FrameworkCtx>(framework_arc);
     }
 
+    if let Ok((Some(lower), Some(upper))) = env::var("SHARD_RANGE").map(|sr| {
+        let mut split = sr
+            .split(',')
+            .map(|val| val.parse::<u64>().expect("SHARD_RANGE not an integer"));
+
+        (split.next(), split.next())
+    }) {
+        let total_shards = env::var("SHARD_COUNT")
+            .map(|shard_count| shard_count.parse::<u64>().ok())
+            .ok()
+            .flatten()
+            .expect("No SHARD_COUNT provided, but SHARD_RANGE was provided");
+
+        assert!(
+            lower < upper,
+            "SHARD_RANGE lower limit is not less than the upper limit"
+        );
+
+        info!(
+            "Starting client fragment with shards {}-{}/{}",
+            lower, upper, total_shards
+        );
+
+        client
+            .start_shard_range([lower, upper], total_shards)
+            .await?;
+    } else if let Ok(total_shards) = env::var("SHARD_COUNT").map(|shard_count| {
+        shard_count
+            .parse::<u64>()
+            .expect("SHARD_COUNT not an integer")
+    }) {
+        info!("Starting client with {} shards", total_shards);
+
+        client.start_shards(total_shards).await?;
+    } else {
+        info!("Starting client as autosharded");
+
         client.start_autosharded().await?;
+    }
 
     Ok(())
 }