Introduce the stderr logger to the project

src/bin/indexer.rs

@@ -55,6 +55,10 @@ struct Opt {
     #[structopt(long, default_value = "4294967296")]
     max_memory_usage: usize,
 
+    /// Verbose mode (-v, -vv, -vvv, etc.)
+    #[structopt(short, long, parse(from_occurrences))]
+    verbose: usize,
+
     /// CSV file to index, if unspecified the CSV is read from standard input.
     csv_file: Option<PathBuf>,
 }
@@ -417,6 +421,12 @@ fn compute_words_attributes_docids(wtxn: &mut heed::RwTxn, index: &Index) -> any
 fn main() -> anyhow::Result<()> {
     let opt = Opt::from_args();
 
+    stderrlog::new()
+        .verbosity(opt.verbose)
+        .show_level(false)
+        .timestamp(stderrlog::Timestamp::Off)
+        .init()?;
+
     if let Some(jobs) = opt.jobs {
         rayon::ThreadPoolBuilder::new().num_threads(jobs).build_global()?;
     }

src/bin/search.rs

@@ -20,6 +20,10 @@ struct Opt {
     #[structopt(long = "db", parse(from_os_str))]
     database: PathBuf,
 
+    /// Verbose mode (-v, -vv, -vvv, etc.)
+    #[structopt(short, long, parse(from_occurrences))]
+    verbose: usize,
+
     /// The query string to search for (doesn't support prefix search yet).
     query: Option<String>,
 }
@@ -27,6 +31,12 @@ struct Opt {
 fn main() -> anyhow::Result<()> {
     let opt = Opt::from_args();
 
+    stderrlog::new()
+        .verbosity(opt.verbose)
+        .show_level(false)
+        .timestamp(stderrlog::Timestamp::Off)
+        .init()?;
+
     std::fs::create_dir_all(&opt.database)?;
     let env = EnvOpenOptions::new()
         .map_size(100 * 1024 * 1024 * 1024) // 100 GB

src/bin/serve.rs

@@ -29,6 +29,10 @@ struct Opt {
     #[structopt(long = "db-size", default_value = "107374182400")] // 100 GB
     database_size: usize,
 
+    /// Verbose mode (-v, -vv, -vvv, etc.)
+    #[structopt(short, long, parse(from_occurrences))]
+    verbose: usize,
+
     /// The ip and port on which the database will listen for HTTP requests.
     #[structopt(short = "l", long, default_value = "127.0.0.1:9700")]
     http_listen_addr: String,
@@ -46,6 +50,12 @@ struct IndexTemplate {
 async fn main() -> anyhow::Result<()> {
     let opt = Opt::from_args();
 
+    stderrlog::new()
+        .verbosity(opt.verbose)
+        .show_level(false)
+        .timestamp(stderrlog::Timestamp::Off)
+        .init()?;
+
     std::fs::create_dir_all(&opt.database)?;
     let env = EnvOpenOptions::new()
         .map_size(opt.database_size)
@@ -158,7 +168,6 @@ async fn main() -> anyhow::Result<()> {
         .or(query_route);
 
     let addr = SocketAddr::from_str(&opt.http_listen_addr).unwrap();
-    println!("listening on http://{}", addr);
     warp::serve(routes).run(addr).await;
 
     Ok(())