Modularize CLI

This introduces one small breaking change: `--root` and `--font-paths` can't appear in front of the command anymore. Also fixes #1491.

1 files changed, 0 insertions, 136 deletions

diff --git a/cli/src/trace.rs b/cli/src/trace.rs
deleted file mode 100644
index 06b5668e..00000000
--- a/cli/src/trace.rs
+++ /dev/null
@@ -1,136 +0,0 @@
-use std::fs::File;
-use std::io::{BufReader, BufWriter, Error, ErrorKind, Seek, SeekFrom};
-use std::path::PathBuf;
-
-use inferno::flamegraph::Options;
-use tracing::metadata::LevelFilter;
-use tracing_error::ErrorLayer;
-use tracing_flame::{FlameLayer, FlushGuard};
-use tracing_subscriber::fmt;
-use tracing_subscriber::prelude::*;
-
-use crate::args::CliArguments;
-
-/// Will flush the flamegraph to disk when dropped.
-pub struct TracingGuard {
-    flush_guard: Option<FlushGuard<BufWriter<File>>>,
-    temp_file: File,
-    output_svg: PathBuf,
-}
-
-impl TracingGuard {
-    pub fn finish(&mut self) -> Result<(), Error> {
-        if self.flush_guard.is_none() {
-            return Ok(());
-        }
-
-        tracing::info!("Flushing tracing flamegraph...");
-
-        // At this point, we're done tracing, so we can drop the guard.
-        // This will flush the tracing output to disk.
-        // We can then read the file and generate the flamegraph.
-        drop(self.flush_guard.take());
-
-        // Reset the file pointer to the beginning.
-        self.temp_file.seek(SeekFrom::Start(0))?;
-
-        // Create the readers and writers.
-        let reader = BufReader::new(&mut self.temp_file);
-        let output = BufWriter::new(File::create(&self.output_svg)?);
-
-        // Create the options: default in flame chart mode
-        let mut options = Options::default();
-        options.flame_chart = true;
-
-        inferno::flamegraph::from_reader(&mut options, reader, output)
-            .map_err(|e| Error::new(ErrorKind::Other, e))?;
-
-        Ok(())
-    }
-}
-
-impl Drop for TracingGuard {
-    fn drop(&mut self) {
-        if !std::thread::panicking() {
-            if let Err(e) = self.finish() {
-                // Since we are finished, we cannot rely on tracing to log the
-                // error.
-                eprintln!("Failed to flush tracing flamegraph: {e}");
-            }
-        }
-    }
-}
-
-/// Initializes the tracing system and returns a guard that will flush the
-/// flamegraph to disk when dropped.
-pub fn init_tracing(args: &CliArguments) -> Result<Option<TracingGuard>, Error> {
-    let flamegraph = args.command.as_compile().and_then(|c| c.flamegraph.as_ref());
-
-    if flamegraph.is_some() && args.command.is_watch() {
-        return Err(Error::new(
-            ErrorKind::InvalidInput,
-            "cannot use --flamegraph with watch command",
-        ));
-    }
-
-    // Short circuit if we don't need to initialize flamegraph or debugging.
-    if flamegraph.is_none() && args.verbosity == 0 {
-        tracing_subscriber::fmt()
-            .without_time()
-            .with_max_level(level_filter(args))
-            .init();
-
-        return Ok(None);
-    }
-
-    // Build the FMT layer printing to the console.
-    let fmt_layer = fmt::Layer::default().without_time().with_filter(level_filter(args));
-
-    // Error layer for building backtraces
-    let error_layer = ErrorLayer::default();
-
-    // Build the registry.
-    let registry = tracing_subscriber::registry().with(fmt_layer).with(error_layer);
-
-    let Some(path) = flamegraph else {
-        registry.init();
-        return Ok(None);
-    };
-
-    // Create a temporary file to store the flamegraph data.
-    let temp_file = tempfile::tempfile()?;
-    let writer = BufWriter::new(temp_file.try_clone()?);
-
-    // Build the flamegraph layer.
-    let flame_layer = FlameLayer::new(writer)
-        .with_empty_samples(false)
-        .with_threads_collapsed(true)
-        .with_module_path(false)
-        .with_file_and_line(true);
-    let flush_guard = flame_layer.flush_on_drop();
-
-    // Build the subscriber.
-    registry.with(flame_layer).init();
-
-    tracing::warn!(
-        "Flamegraph is enabled, this can create a large temporary \
-         file and slow down the compilation process."
-    );
-
-    Ok(Some(TracingGuard {
-        flush_guard: Some(flush_guard),
-        temp_file,
-        output_svg: path.clone().unwrap_or_else(|| "flamegraph.svg".into()),
-    }))
-}
-
-/// Returns the log level filter for the given verbosity level.
-fn level_filter(args: &CliArguments) -> LevelFilter {
-    match args.verbosity {
-        0 => LevelFilter::OFF,
-        1 => LevelFilter::WARN,
-        2 => LevelFilter::INFO,
-        3 => LevelFilter::DEBUG,
-        _ => LevelFilter::TRACE,
-    }
-}