85 lines
2.4 KiB
Rust
85 lines
2.4 KiB
Rust
#[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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use tree_sitter::Parser;
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#[cfg(unix)]
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const HTML_HEADER: &[u8] = b"<!DOCTYPE html>\n<style>svg { width: 100%; }</style>\n\n";
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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(PathBuf, Option<Child>, Option<ChildStdin>);
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#[cfg(windows)]
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pub fn log_graphs(_parser: &mut Parser, _path: &str) -> std::io::Result<LogSession> {
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Ok(LogSession())
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}
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#[cfg(unix)]
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pub fn log_graphs(parser: &mut Parser, path: &str) -> std::io::Result<LogSession> {
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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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.expect("Failed to run Dot");
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let dot_stdin = dot_process
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.stdin
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.take()
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.expect("Failed to open stdin for Dot");
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parser.print_dot_graphs(&dot_stdin);
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Ok(LogSession(
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PathBuf::from(path),
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Some(dot_process),
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Some(dot_stdin),
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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.2.take().unwrap());
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let output = self.1.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.0).unwrap().len() > HTML_HEADER.len() as u64
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{
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Command::new("open").arg(&self.0).output().unwrap();
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}
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#[cfg(any(debug_assertions, test))]
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validate_graph_log(&self);
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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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#[cfg(all(unix, any(debug_assertions, test)))]
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fn validate_graph_log(session: &LogSession) {
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use std::io::{BufRead, BufReader};
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let has_zero_indexed_row = |s: &str| s.contains("position: 0,");
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let graph_log = std::fs::File::open(&session.0)
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.expect("Failed to open graph log");
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let log_reader = BufReader::new(graph_log)
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.lines()
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.map(|l| l.expect("Failed to read line from graph log"));
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for line in log_reader {
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assert!(!has_zero_indexed_row(&line), "Graph log output includes zero-indexed row: {}", line);
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}
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}
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