Move to multi crates project

Starting impl devcontainer spec

crates/herald-server/src/env.rs

@@ -0,0 +1,82 @@
+use anyhow::anyhow;
+
+#[derive(Clone)]
+pub struct EnvConfig {
+    pub http_port: u16,
+    pub webhook_secret: String,
+    pub open_router_api_key: String,
+    pub open_router_model: String,
+    pub open_router_timeout: u64,
+    pub bot_max_concurrent: usize,
+    pub gitea_url: String,
+    pub gitea_token: String,
+    pub gitea_timeout: u64,
+    pub metrics_bind_addr: Option<String>,
+}
+
+pub fn load_config() -> anyhow::Result<EnvConfig> {
+    let http_port = try_get_env("HTTP_PORT")?.parse()?;
+    let webhook_secret = try_get_env("WEBHOOK_SIG_HEADER_SECRET")?;
+    let open_router_api_key = try_get_env("OPEN_ROUTER_API_KEY")?;
+    let open_router_model = try_get_env("OPEN_ROUTER_MODEL")?;
+    let open_router_timeout = try_get_env("OPEN_ROUTER_TIMEOUT")?.parse()?;
+    let bot_max_concurrent = try_get_env("BOT_MAX_CONCURRENT")?.parse()?;
+    let gitea_url = try_get_env("GITEA_URL")?;
+    let gitea_token = try_get_env("GITEA_TOKEN")?;
+    let gitea_timeout = try_get_env("GITEA_TIMEOUT")?.parse()?;
+    let metrics_bind_addr = std::env::var("METRICS_BIND_ADDR").ok();
+
+    Ok(EnvConfig {
+        http_port,
+        webhook_secret,
+        open_router_api_key,
+        open_router_model,
+        open_router_timeout,
+        bot_max_concurrent,
+        gitea_url,
+        gitea_token,
+        gitea_timeout,
+        metrics_bind_addr,
+    })
+}
+
+pub fn try_get_env(key: &str) -> anyhow::Result<String> {
+    let env_value = std::env::var(key).map_err(|e| anyhow::anyhow!("{}: {}", key, e))?;
+
+    if env_value.trim().is_empty() {
+        return Err(anyhow!(format!("env var {} is empty", key)));
+    }
+
+    Ok(env_value)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_try_get_env_returns_value() {
+        unsafe { std::env::set_var("TEST_ENV_PRESENT", "hello") };
+        assert_eq!(try_get_env("TEST_ENV_PRESENT").unwrap(), "hello");
+    }
+
+    #[test]
+    fn test_try_get_env_missing_var_returns_error() {
+        unsafe { std::env::remove_var("TEST_ENV_MISSING") };
+        assert!(try_get_env("TEST_ENV_MISSING").is_err());
+    }
+
+    #[test]
+    fn test_try_get_env_empty_value_returns_error() {
+        unsafe { std::env::set_var("TEST_ENV_EMPTY", "") };
+        let err = try_get_env("TEST_ENV_EMPTY").unwrap_err();
+        assert!(err.to_string().contains("TEST_ENV_EMPTY"));
+    }
+
+    #[test]
+    fn test_try_get_env_whitespace_only_returns_error() {
+        unsafe { std::env::set_var("TEST_ENV_WHITESPACE", "   ") };
+        let err = try_get_env("TEST_ENV_WHITESPACE").unwrap_err();
+        assert!(err.to_string().contains("TEST_ENV_WHITESPACE"));
+    }
+}