117 lines
2.9 KiB
Rust
117 lines
2.9 KiB
Rust
use anyhow::Result;
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use std::sync::atomic::{AtomicUsize, Ordering};
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use std::sync::Arc;
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use tree_sitter::{Parser, Tree};
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#[cfg(unix)]
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use anyhow::{anyhow, Context};
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#[cfg(unix)]
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use std::path::PathBuf;
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#[cfg(unix)]
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use std::process::{Child, ChildStdin, Command, Stdio};
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#[cfg(unix)]
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const HTML_HEADER: &[u8] = b"
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<!DOCTYPE html>
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<style>
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svg { width: 100%; }
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</style>
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";
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pub fn cancel_on_signal() -> Arc<AtomicUsize> {
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let result = Arc::new(AtomicUsize::new(0));
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ctrlc::set_handler({
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let flag = result.clone();
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move || {
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flag.store(1, Ordering::Relaxed);
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}
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})
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.expect("Error setting Ctrl-C handler");
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result
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}
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#[cfg(windows)]
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pub struct LogSession;
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#[cfg(unix)]
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pub struct LogSession {
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path: PathBuf,
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dot_process: Option<Child>,
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dot_process_stdin: Option<ChildStdin>,
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}
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#[cfg(windows)]
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pub fn print_tree_graph(_tree: &Tree, _path: &str) -> Result<()> {
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Ok(())
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}
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#[cfg(windows)]
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pub fn log_graphs(_parser: &mut Parser, _path: &str) -> Result<LogSession> {
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Ok(LogSession)
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}
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#[cfg(unix)]
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pub fn print_tree_graph(tree: &Tree, path: &str) -> Result<()> {
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let session = LogSession::new(path)?;
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tree.print_dot_graph(session.dot_process_stdin.as_ref().unwrap());
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Ok(())
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}
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#[cfg(unix)]
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pub fn log_graphs(parser: &mut Parser, path: &str) -> Result<LogSession> {
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let session = LogSession::new(path)?;
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parser.print_dot_graphs(session.dot_process_stdin.as_ref().unwrap());
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Ok(session)
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}
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#[cfg(unix)]
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impl LogSession {
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fn new(path: &str) -> Result<Self> {
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use std::io::Write;
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let mut dot_file = std::fs::File::create(path)?;
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dot_file.write(HTML_HEADER)?;
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let mut dot_process = Command::new("dot")
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.arg("-Tsvg")
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.stdin(Stdio::piped())
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.stdout(dot_file)
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.spawn()
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.with_context(|| {
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"Failed to run the `dot` command. Check that graphviz is installed."
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})?;
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let dot_stdin = dot_process
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.stdin
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.take()
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.ok_or_else(|| anyhow!("Failed to open stdin for `dot` process."))?;
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Ok(Self {
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path: PathBuf::from(path),
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dot_process: Some(dot_process),
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dot_process_stdin: Some(dot_stdin),
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})
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}
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}
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#[cfg(unix)]
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impl Drop for LogSession {
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fn drop(&mut self) {
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use std::fs;
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drop(self.dot_process_stdin.take().unwrap());
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let output = self.dot_process.take().unwrap().wait_with_output().unwrap();
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if output.status.success() {
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if cfg!(target_os = "macos")
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&& fs::metadata(&self.path).unwrap().len() > HTML_HEADER.len() as u64
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{
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Command::new("open").arg(&self.path).output().unwrap();
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}
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} else {
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eprintln!(
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"Dot failed: {} {}",
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String::from_utf8_lossy(&output.stdout),
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String::from_utf8_lossy(&output.stderr)
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);
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}
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}
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}
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