Use pretty logging at high -vvvv

cli/src/args.rs

@@ -85,7 +85,7 @@ pub fn get_args(tagged_filterer: bool) -> Result<ArgMatches<'static>> {
 			.long("debounce"))
 		.arg(Arg::with_name("verbose")
 			.help_heading(Some(OPTSET_DEBUGGING))
-			.help("Print debugging messages (-v, -vv, -vvv; use -vvv for bug reports)")
+			.help("Print debugging messages (-v, -vv, -vvv, -vvvv; use -vvv for bug reports)")
 			.multiple(true)
 			.short("v")
 			.long("verbose"))

cli/src/main.rs

@@ -26,15 +26,25 @@ async fn main() -> Result<()> {
 
 	let args = args::get_args(tagged_filterer)?;
 
-	tracing_subscriber::fmt()
-		.with_env_filter(match args.occurrences_of("verbose") {
+	{
+		let verbosity = args.occurrences_of("verbose");
+		let mut builder = tracing_subscriber::fmt().with_env_filter(match verbosity {
 			0 => "watchexec-cli=warn",
 			1 => "watchexec=debug,watchexec-cli=debug",
 			2 => "watchexec=trace,watchexec-cli=trace",
 			_ => "trace",
-		})
-		.try_init()
-		.ok();
+		});
+
+		if verbosity > 2 {
+			builder = builder.with_span_events(tracing_subscriber::fmt::format::FmtSpan::FULL);
+		}
+
+		if verbosity > 3 {
+			builder.pretty().try_init().ok();
+		} else {
+			builder.try_init().ok();
+		}
+	}
 
 	let init = config::init(&args)?;
 	let mut runtime = config::runtime(&args)?;

cli/tests/snapshots/help__help_unix.snap

@@ -25,7 +25,7 @@ FLAGS:
         --print-events         Print events that trigger actions
     -r, --restart              Restart the process if it's still running. Shorthand for --on-busy-update=restart
     -V, --version              Prints version information
-    -v, --verbose              Print debugging messages (-v, -vv, -vvv; use -vvv for bug reports)
+    -v, --verbose              Print debugging messages (-v, -vv, -vvv, -vvvv; use -vvv for bug reports)
 
 OPTIONS:
     -d, --debounce <milliseconds>            Set the timeout between detected change and command execution, defaults to

cli/tests/snapshots/help__help_windows.snap

@@ -25,7 +25,7 @@ FLAGS:
         --print-events         Print events that trigger actions
     -r, --restart              Restart the process if it's still running. Shorthand for --on-busy-update=restart
     -V, --version              Prints version information
-    -v, --verbose              Print debugging messages (-v, -vv, -vvv; use -vvv for bug reports)
+    -v, --verbose              Print debugging messages (-v, -vv, -vvv, -vvvv; use -vvv for bug reports)
 
 OPTIONS:
     -d, --debounce <milliseconds>            Set the timeout between detected change and command execution, defaults to