From dc1f4bd19d60266e921d386e1bf14431982e85cc Mon Sep 17 00:00:00 2001
From: Silas Brack <silas@teton.ai>
Date: Sat, 7 Mar 2026 17:26:09 +0100
Subject: [PATCH] Configure using environment variables

---
 Cargo.toml  | 2 +-
 src/main.rs | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 659e8bc..b4a5cac 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,7 @@ rusqlite = { version = "0.35", features = ["bundled"] }
 reqwest = { version = "0.12", features = ["json"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-clap = { version = "4", features = ["derive"] }
+clap = { version = "4", features = ["derive", "env"] }
 tracing = "0.1"
 tracing-subscriber = "0.3"
 sha2 = "0.10"
diff --git a/src/main.rs b/src/main.rs
index 6925ea8..dc49008 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,13 +3,13 @@ use clap::{Parser, Subcommand};
 #[derive(Parser)]
 #[command(name = "mkv", about = "Distributed key-value store")]
 struct Cli {
-    #[arg(short, long, default_value = "/tmp/mkv/index.db")]
+    #[arg(short, long, env = "MKV_DB", default_value = "/tmp/mkv/index.db")]
     db: String,
 
-    #[arg(short, long, required = true, value_delimiter = ',')]
+    #[arg(short, long, env = "MKV_VOLUMES", required = true, value_delimiter = ',')]
     volumes: Vec<String>,
 
-    #[arg(short, long, default_value_t = 2)]
+    #[arg(short, long, env = "MKV_REPLICAS", default_value_t = 2)]
     replicas: usize,
 
     #[command(subcommand)]
@@ -20,7 +20,7 @@ struct Cli {
 enum Commands {
     /// Start the index server
     Serve {
-        #[arg(short, long, default_value_t = 3000)]
+        #[arg(short, long, env = "MKV_PORT", default_value_t = 3000)]
         port: u16,
     },
     /// Rebuild SQLite index from volume servers