Extract Sentry initialization code into dedicated function

src/bin/server.rs

@@ -1,36 +1,20 @@
 #![warn(clippy::all, rust_2018_idioms)]
 
 use cargo_registry::{metrics::LogEncoder, util::errors::AppResult, App, Env};
-use std::{borrow::Cow, fs::File, process::Command, sync::Arc, time::Duration};
+use std::{fs::File, process::Command, sync::Arc, time::Duration};
 
 use conduit_hyper::Service;
 use futures_util::future::FutureExt;
 use prometheus::Encoder;
 use reqwest::blocking::Client;
-use sentry::{ClientOptions, IntoDsn};
 use std::io::Write;
 use tokio::io::AsyncWriteExt;
 use tokio::signal::unix::{signal, SignalKind};
 
 const CORE_THREADS: usize = 4;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let _sentry = dotenv::var("SENTRY_DSN_API")
-        .ok()
-        .into_dsn()
-        .expect("SENTRY_DSN_API is not a valid Sentry DSN value")
-        .map(|dsn| {
-            let mut opts = ClientOptions::from(dsn);
-            opts.environment = Some(
-                dotenv::var("SENTRY_ENV_API")
-                    .map(Cow::Owned)
-                    .expect("SENTRY_ENV_API must be set when using SENTRY_DSN_API"),
-            );
-
-            opts.release = dotenv::var("HEROKU_SLUG_COMMIT").ok().map(Into::into);
-
-            sentry::init(opts)
-        });
+    let _sentry = cargo_registry::sentry::init();
 
     // Initialize logging
     tracing_subscriber::fmt::init();

src/lib.rs

@@ -55,6 +55,7 @@ pub mod util;
 pub mod controllers;
 pub mod models;
 mod router;
+pub mod sentry;
 pub mod views;
 
 /// Used for setting different values depending on whether the app is being run in production,

src/sentry.rs

@@ -0,0 +1,30 @@
+use sentry::{ClientInitGuard, ClientOptions, IntoDsn};
+use std::borrow::Cow;
+
+/// Initializes the Sentry SDK from the environment variables.
+///
+/// If `SENTRY_DSN_API` is not set then Sentry will not be initialized,
+/// otherwise it is required to be a valid DSN string. `SENTRY_ENV_API` must
+/// be set if a DSN is provided.
+///
+/// `HEROKU_SLUG_COMMIT`, if present, will be used as the `release` property
+/// on all events.
+#[must_use]
+pub fn init() -> Option<ClientInitGuard> {
+    dotenv::var("SENTRY_DSN_API")
+        .ok()
+        .into_dsn()
+        .expect("SENTRY_DSN_API is not a valid Sentry DSN value")
+        .map(|dsn| {
+            let mut opts = ClientOptions::from(dsn);
+            opts.environment = Some(
+                dotenv::var("SENTRY_ENV_API")
+                    .map(Cow::Owned)
+                    .expect("SENTRY_ENV_API must be set when using SENTRY_DSN_API"),
+            );
+
+            opts.release = dotenv::var("HEROKU_SLUG_COMMIT").ok().map(Into::into);
+
+            sentry::init(opts)
+        })
+}