Migrate more println!() calls to use tracing instead

cargo-registry-index/Cargo.toml

@@ -20,5 +20,6 @@ dotenv = "=0.15.0"
 git2 = "=0.15.0"
 serde = { version = "=1.0.147", features = ["derive"] }
 tempfile = "=3.3.0"
+tracing = "=0.1.37"
 url = "=2.3.1"
 serde_json = { version = "=1.0.89", optional = true }

cargo-registry-index/lib.rs

@@ -1,5 +1,7 @@
 #[macro_use]
 extern crate serde;
+#[macro_use]
+extern crate tracing;
 
 #[cfg(feature = "testing")]
 pub mod testing;
@@ -177,10 +179,8 @@ impl RepositoryConfig {
         match (username, password, http_url, ssh_key, ssh_url) {
             (extra_user, extra_pass, extra_http_url, Ok(encoded_key), Ok(ssh_url)) => {
                 if let (Ok(_), Ok(_), Ok(_)) = (extra_user, extra_pass, extra_http_url) {
-                    println!(
-                        "warning: both http and ssh credentials to authenticate with git are set"
-                    );
-                    println!("note: ssh credentials will take precedence over the http ones");
+                    warn!("both http and ssh credentials to authenticate with git are set");
+                    info!("note: ssh credentials will take precedence over the http ones");
                 }
 
                 let index_location =
@@ -439,13 +439,13 @@ impl Repository {
     /// This function also prints the commit message and a success or failure
     /// message to the console.
     pub fn commit_and_push(&self, message: &str, modified_file: &Path) -> anyhow::Result<()> {
-        println!("Committing and pushing \"{message}\"");
+        info!("Committing and pushing \"{message}\"");
 
         let relative_path = modified_file.strip_prefix(self.checkout_path.path())?;
         self.perform_commit_and_push(message, relative_path)
-            .map(|_| println!("Commit and push finished for \"{message}\""))
+            .map(|_| info!("Commit and push finished for \"{message}\""))
             .map_err(|err| {
-                eprintln!("Commit and push for \"{message}\" errored: {err}");
+                error!(?err, "Commit and push for \"{message}\" errored");
                 err
             })
     }
@@ -467,7 +467,7 @@ impl Repository {
         let head = self.head_oid()?;
 
         if head != original_head {
-            println!("Resetting index from {original_head} to {head}");
+            info!("Resetting index from {original_head} to {head}");
         }
 
         let obj = self.repository.find_object(head, None)?;

src/admin/migrate.rs

@@ -23,7 +23,7 @@ pub fn run(_opts: Opts) -> Result<(), Error> {
         // TODO: Check `any_pending_migrations()` with a read-only connection and error if true.
         // It looks like this requires changes upstream to make this pub in `migration_macros`.
 
-        println!("==> Skipping migrations and category sync (read-only mode)");
+        warn!("Skipping migrations and category sync (read-only mode)");
 
         // The service is undergoing maintenance or mitigating an outage.
         // Exit with success to ensure configuration changes can be made.
@@ -34,10 +34,10 @@ pub fn run(_opts: Opts) -> Result<(), Error> {
     // The primary is online, access directly via `DATABASE_URL`.
     let conn = crate::db::oneoff_connection_with_config(&config)?;
 
-    println!("==> migrating the database");
+    info!("Migrating the database");
     embedded_migrations::run_with_output(&conn, &mut std::io::stdout())?;
 
-    println!("==> synchronizing crate categories");
+    info!("Synchronizing crate categories");
     crate::boot::categories::sync_with_connection(CATEGORIES_TOML, &conn).unwrap();
 
     Ok(())

src/bin/background-worker.rs

@@ -12,6 +12,9 @@
 
 #![warn(clippy::all, rust_2018_idioms)]
 
+#[macro_use]
+extern crate tracing;
+
 use cargo_registry::config;
 use cargo_registry::worker::cloudfront::CloudFront;
 use cargo_registry::{background_jobs::*, db};
@@ -23,19 +26,19 @@ use std::thread::sleep;
 use std::time::Duration;
 
 fn main() {
-    println!("Booting runner");
-
     let _sentry = cargo_registry::sentry::init();
 
     // Initialize logging
     cargo_registry::util::tracing::init();
 
+    info!("Booting runner");
+
     let config = config::Server::default();
     let uploader = config.base.uploader();
 
     if config.db.are_all_read_only() {
         loop {
-            println!(
+            warn!(
                 "Cannot run background jobs with a read-only pool. Please scale background_worker \
                 to 0 processes until the leader database is available."
             );
@@ -50,13 +53,13 @@ fn main() {
         .parse()
         .expect("Invalid value for `BACKGROUND_JOB_TIMEOUT`");
 
-    println!("Cloning index");
+    info!("Cloning index");
 
     let repository_config = RepositoryConfig::from_environment();
     let repository = Arc::new(Mutex::new(
         Repository::open(&repository_config).expect("Failed to clone index"),
     ));
-    println!("Index cloned");
+    info!("Index cloned");
 
     let cloudfront = CloudFront::from_environment();
 
@@ -79,18 +82,15 @@ fn main() {
     };
     let mut runner = build_runner();
 
-    println!("Runner booted, running jobs");
+    info!("Runner booted, running jobs");
 
     let mut failure_count = 0;
 
     loop {
         if let Err(e) = runner.run_all_pending_jobs() {
             failure_count += 1;
             if failure_count < 5 {
-                eprintln!(
-                    "Error running jobs (n = {}) -- retrying: {:?}",
-                    failure_count, e,
-                );
+                warn!(?failure_count, err = ?e, "Error running jobs -- retrying");
                 runner = build_runner();
             } else {
                 panic!("Failed to begin running jobs 5 times. Restarting the process");

src/bin/server.rs

@@ -1,5 +1,8 @@
 #![warn(clippy::all, rust_2018_idioms)]
 
+#[macro_use]
+extern crate tracing;
+
 use cargo_registry::{env_optional, metrics::LogEncoder, util::errors::AppResult, App, Env};
 use std::{fs::File, process::Command, sync::Arc, time::Duration};
 
@@ -8,7 +11,6 @@ use futures_util::future::FutureExt;
 use prometheus::Encoder;
 use reqwest::blocking::Client;
 use std::io::{self, Write};
-use tokio::io::AsyncWriteExt;
 use tokio::signal::unix::{signal, SignalKind};
 
 const CORE_THREADS: usize = 4;
@@ -85,18 +87,16 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                 _ = sig_int.recv().fuse() => {},
                 _ = sig_term.recv().fuse() => {},
             };
-            tokio::io::stdout()
-                .write_all(b"Starting graceful shutdown\n")
-                .await
-                .ok();
+
+            info!("Starting graceful shutdown");
         });
 
         Ok::<_, io::Error>((addr, server))
     })?;
 
     // Do not change this line! Removing the line or changing its contents in any way will break
     // the test suite :)
-    println!("Listening at http://{addr}");
+    info!("Listening at http://{addr}");
 
     // Creating this file tells heroku to tell nginx that the application is ready
     // to receive traffic.
@@ -106,7 +106,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         } else {
             "/tmp/app-initialized"
         };
-        println!("Writing to {path}");
+        info!("Writing to {path}");
         File::create(path).unwrap();
 
         // Launch nginx via the Heroku nginx buildpack
@@ -120,13 +120,13 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Block the main thread until the server has shutdown
     rt.block_on(server)?;
 
-    println!("Persisting remaining downloads counters");
+    info!("Persisting remaining downloads counters");
     match app.downloads_counter.persist_all_shards(&app) {
         Ok(stats) => stats.log(),
-        Err(err) => println!("downloads_counter error: {err}"),
+        Err(err) => error!(?err, "downloads_counter error"),
     }
 
-    println!("Server has gracefully shutdown!");
+    info!("Server has gracefully shutdown!");
     Ok(())
 }
 
@@ -140,7 +140,7 @@ fn downloads_counter_thread(app: Arc<App>) {
 
         match app.downloads_counter.persist_next_shard(&app) {
             Ok(stats) => stats.log(),
-            Err(err) => println!("downloads_counter error: {err}"),
+            Err(err) => error!(?err, "downloads_counter error"),
         }
     });
 }
@@ -155,7 +155,7 @@ fn log_instance_metrics_thread(app: Arc<App>) {
 
     std::thread::spawn(move || loop {
         if let Err(err) = log_instance_metrics_inner(&app) {
-            eprintln!("log_instance_metrics error: {err}");
+            error!(?err, "log_instance_metrics error");
         }
         std::thread::sleep(interval);
     });

src/config/base.rs

@@ -38,13 +38,13 @@ impl Base {
                     // for the related S3 environment variables and configure the app to upload to
                     // and read from S3 like production does. All values except for bucket are
                     // optional, like production read-only mirrors.
-                    println!("Using S3 uploader");
+                    info!("Using S3 uploader");
                     Self::s3_maybe_read_only()
                 } else {
                     // If we don't set the `S3_BUCKET` variable, we'll use a development-only
                     // uploader that makes it possible to run and publish to a locally-running
                     // crates.io instance without needing to set up an account and a bucket in S3.
-                    println!(
+                    info!(
                         "Using local uploader, crate files will be in the local_uploads directory"
                     );
                     Uploader::Local

src/middleware.rs

@@ -90,12 +90,10 @@ pub fn build_middleware(app: Arc<App>, endpoints: RouteBuilder) -> MiddlewareBui
     if let Ok(capacity) = env::var("DB_PRIMARY_POOL_SIZE") {
         if let Ok(capacity) = capacity.parse() {
             if capacity >= 10 {
-                println!("Enabling BalanceCapacity middleware with {capacity} pool capacity");
+                info!(?capacity, "Enabling BalanceCapacity middleware");
                 m.around(balance_capacity::BalanceCapacity::new(capacity))
             } else {
-                println!(
-                    "BalanceCapacity middleware not enabled. DB_PRIMARY_POOL_SIZE is too low."
-                );
+                info!("BalanceCapacity middleware not enabled. DB_PRIMARY_POOL_SIZE is too low.");
             }
         }
     }

src/tests/server_binary.rs

@@ -121,6 +121,7 @@ impl ServerBin {
         let mut process = Command::new(env!("CARGO_BIN_EXE_server"))
             .env_clear()
             .envs(self.env.into_iter())
+            .env("RUST_LOG", "info")
             .stdout(Stdio::piped())
             .stderr(Stdio::piped())
             .spawn()?;
@@ -197,7 +198,10 @@ where
             // If we expect the port number to be logged into this stream, look for it and send it
             // over the channel as soon as it's found.
             if let Some(port_send) = &port_send {
-                if let Some(url) = line.strip_prefix("Listening at ") {
+                let pattern = "Listening at ";
+                if let Some(idx) = line.find(pattern) {
+                    let start = idx + pattern.len();
+                    let url = &line[start..];
                     let url = Url::parse(url).unwrap();
                     let port = url.port().unwrap();
                     port_send