fn finish_data_collection()

in src/data/perf_profile.rs [79:128]
46 lines of code
2 McCabe index (conditional complexity)

    fn finish_data_collection(&mut self, params: &CollectorParams) -> Result<()> {
        let mut child = PERF_CHILD.lock().unwrap();
        match child.as_ref() {
            None => return Ok(()),
            Some(_) => {}
        }

        signal::kill(
            Pid::from_raw(child.as_mut().unwrap().id() as i32),
            params.signal,
        )?;

        trace!("Waiting for perf profile collection to complete...");
        match child.as_mut().unwrap().wait() {
            Err(e) => {
                error!("'perf' did not exit successfully: {}", e);
                return Ok(());
            }
            Ok(_) => trace!("'perf record' executed successfully."),
        }
        let mut top_functions_file =
            fs::File::create(params.data_dir.join(PERF_TOP_FUNCTIONS_FILE_NAME))?;

        let out = Command::new("perf")
            .args([
                "report",
                "--stdio",
                "--percent-limit",
                "1",
                "-i",
                &params.data_file_path.display().to_string(),
            ])
            .output();

        match out {
            Err(e) => {
                let out = format!("Skipped processing profiling data due to : {}", e);
                error!("{}", out);
                write!(top_functions_file, "{}", out)?;
            }
            Ok(v) => {
                let mut top_functions = "No data collected";
                if !v.stdout.is_empty() {
                    top_functions = std::str::from_utf8(&v.stdout)?;
                }
                write!(top_functions_file, "{}", top_functions)?;
            }
        }
        Ok(())
    }