feat: add --logs flag to local command (#2187)

Added `--logs` subcommand to local command. Defaults to `debug.log` when
no file is provided.
Closes: #1357

---------

Co-authored-by: Vaibhav Rabber <vrongmeal@gmail.com>

.gitignore

@@ -28,3 +28,6 @@ node_modules
 
 # Benchmark data
 bench_data/
+
+# Logs
+*.log

crates/glaredb/src/args/local.rs

@@ -14,6 +14,10 @@ pub struct LocalArgs {
 
     /// Execute an SQL file.
     pub file: Option<String>,
+
+    /// File for logs to be written to
+    #[clap(long, value_parser)]
+    pub log_file: Option<PathBuf>,
 }
 
 #[derive(Debug, Clone, Parser)]

crates/glaredb/src/bin/main.rs

@@ -51,11 +51,17 @@ fn main() -> Result<()> {
         None => Commands::Local(cli.local_args),
     };
 
-    // Disable logging when running locally since it'll clobber the repl
-    // _unless_ the user specified a logging related option.
-    match (&command, cli.log_mode, cli.verbose) {
-        (Commands::Local { .. }, None, 0) => (),
-        _ => logutil::init(cli.verbose, cli.log_mode.unwrap_or_default().into()),
+    match &command {
+        Commands::Local(args) => {
+            if let Some(file) = &args.log_file {
+                logutil::init(
+                    cli.verbose,
+                    cli.log_mode.unwrap_or_default().into(),
+                    Some(file),
+                )
+            }
+        }
+        _ => logutil::init(cli.verbose, cli.log_mode.unwrap_or_default().into(), None),
     }
 
     command.run()

crates/glaredb/tests/log_file_test.rs

@@ -0,0 +1,87 @@
+mod setup;
+
+use std::{
+    fs::{remove_file, OpenOptions},
+    io::Read,
+};
+
+use crate::setup::{make_cli, DEFAULT_TIMEOUT};
+
+#[test]
+fn test_log_file() -> Result<(), Box<dyn std::error::Error>> {
+    let mut cmd = make_cli();
+    let log_file_name = "test.log";
+    cmd.timeout(DEFAULT_TIMEOUT)
+        .arg("-q")
+        .arg("select 1;")
+        .arg("--log-file")
+        .arg(log_file_name)
+        .assert()
+        .success();
+
+    let mut log_file = std::env::current_dir().expect("failed to retrieve current dir");
+    log_file.push(log_file_name);
+    assert!(log_file.exists());
+
+    let mut file = OpenOptions::new().read(true).open(&log_file)?;
+    assert!(file.metadata()?.len() > 0);
+
+    let mut content = String::new();
+    file.read_to_string(&mut content)?;
+
+    assert!(content.contains("INFO"));
+    assert!(!content.contains("DEBUG"));
+    assert!(!content.contains("TRACE"));
+
+    assert!(content.contains("Starting in-memory metastore"));
+
+    remove_file(log_file)?;
+    Ok(())
+}
+
+#[test]
+fn test_log_file_verbosity_level() -> Result<(), Box<dyn std::error::Error>> {
+    let mut cmd = make_cli();
+    let log_file_name = "test.log";
+    cmd.timeout(DEFAULT_TIMEOUT)
+        .arg("-v")
+        .arg("-q")
+        .arg("select 1;")
+        .arg("--log-file")
+        .arg(log_file_name)
+        .assert()
+        .success();
+
+    let mut log_file = std::env::current_dir().expect("failed to retrieve current dir");
+    log_file.push(log_file_name);
+    assert!(log_file.exists());
+
+    let mut file = OpenOptions::new().read(true).open(&log_file)?;
+    assert!(file.metadata()?.len() > 0);
+
+    let mut content = String::new();
+    file.read_to_string(&mut content)?;
+
+    assert!(content.contains("DEBUG"));
+    assert!(!content.contains("TRACE"));
+
+    remove_file(log_file)?;
+    Ok(())
+}
+
+#[test]
+fn test_skipping_logs() {
+    let mut cmd = make_cli();
+    let log_file_name = "/usr/bin/debug.log";
+    cmd.timeout(DEFAULT_TIMEOUT)
+        .arg("-q")
+        .arg("select 1;")
+        .arg("--log-file")
+        .arg(log_file_name)
+        .assert()
+        .success();
+
+    let mut log_file = std::env::current_dir().expect("failed to retrieve current dir");
+    log_file.push(log_file_name);
+    assert!(!log_file.exists());
+}

crates/logutil/src/lib.rs

@@ -1,4 +1,6 @@
 //! Utilities for logging and tracing.
+use std::{fs::File, path::PathBuf, sync::Arc};
+
 use tracing::{subscriber, trace, Level};
 use tracing_subscriber::{
     filter::EnvFilter,
@@ -71,7 +73,7 @@ pub fn init_test() {
 
 /// Initialize a trace subsriber printing to the console using the given
 /// verbosity count.
-pub fn init(verbosity: impl Into<Verbosity>, mode: LoggingMode) {
+pub fn init(verbosity: impl Into<Verbosity>, mode: LoggingMode, log_file: Option<&PathBuf>) {
     let verbosity: Verbosity = verbosity.into();
     let level: Level = verbosity.into();
 
@@ -80,16 +82,54 @@ pub fn init(verbosity: impl Into<Verbosity>, mode: LoggingMode) {
     let env_filter = env_filter(level);
     match mode {
         LoggingMode::Json => {
-            let subscriber = json_fmt(level).with_env_filter(env_filter).finish();
-            subscriber::set_global_default(subscriber)
+            let subscriber = json_fmt(level).with_env_filter(env_filter);
+
+            if let Some(file) = log_file {
+                let debug_log = match File::create(file) {
+                    Ok(file) => Arc::new(file),
+                    Err(_) => {
+                        eprintln!("Failed to create file: {:#?}", file);
+                        return subscriber::set_global_default(subscriber.finish()).unwrap();
+                    }
+                };
+
+                subscriber::set_global_default(subscriber.with_writer(debug_log).finish())
+            } else {
+                subscriber::set_global_default(subscriber.finish())
+            }
         }
         LoggingMode::Full => {
-            let subscriber = full_fmt(level).with_env_filter(env_filter).finish();
-            subscriber::set_global_default(subscriber)
+            let subscriber = full_fmt(level).with_env_filter(env_filter);
+
+            if let Some(file) = log_file {
+                let debug_log = match File::create(file) {
+                    Ok(file) => Arc::new(file),
+                    Err(_) => {
+                        eprintln!("Failed to create file: {:#?}", file);
+                        return subscriber::set_global_default(subscriber.finish()).unwrap();
+                    }
+                };
+
+                subscriber::set_global_default(subscriber.with_writer(debug_log).finish())
+            } else {
+                subscriber::set_global_default(subscriber.finish())
+            }
         }
         LoggingMode::Compact => {
-            let subscriber = compact_fmt(level).with_env_filter(env_filter).finish();
-            subscriber::set_global_default(subscriber)
+            let subscriber = compact_fmt(level).with_env_filter(env_filter);
+            if let Some(file) = log_file {
+                let debug_log = match File::create(file) {
+                    Ok(file) => Arc::new(file),
+                    Err(_) => {
+                        eprintln!("Failed to create file: {:#?}", file);
+                        return subscriber::set_global_default(subscriber.finish()).unwrap();
+                    }
+                };
+
+                subscriber::set_global_default(subscriber.with_writer(debug_log).finish())
+            } else {
+                subscriber::set_global_default(subscriber.finish())
+            }
         }
     }
     .unwrap();

crates/testing/src/slt/cli.rs

@@ -107,7 +107,7 @@ impl Cli {
             Verbosity::Debug => LoggingMode::Full,
             Verbosity::Trace => LoggingMode::Full,
         };
-        logutil::init(cli.verbose, log_mode);
+        logutil::init(cli.verbose, log_mode, None);
 
         // Abort the program on panic. This will ensure that slt tests will
         // never pass if there's a panic somewhere.