yara-x-cli 1.19.0

use std::fs::File;
use std::io::{Cursor, Seek, SeekFrom};
use std::path::PathBuf;
use std::{fs, io, process};

use clap::{ArgAction, ArgMatches, Command, arg, value_parser};
use yara_x_fmt::{Formatter, Indentation};

use crate::config::Config;
use crate::help;
use crate::walk;

pub fn fmt() -> Command {
    super::command("fmt")
        .about("Format YARA source files")
        .arg(
            arg!(<PATH>)
                .help("Path to YARA source file or directory")
                .required(true)
                .value_parser(value_parser!(PathBuf))
                .action(ArgAction::Append),
        )
        .arg(
            arg!(-c --check  "Run in 'check' mode")
                .long_help(help::FMT_CHECK_MODE),
        )
        .arg(
            arg!(-r - -"recursive"[MAX_DEPTH])
                .help("Walk directories recursively up to a given depth")
                .long_help(help::RECURSIVE_LONG_HELP)
                .default_missing_value("1000")
                .require_equals(true)
                .value_parser(value_parser!(usize)),
        )
        .arg(
            arg!(-t - -"tab-size" <NUM_SPACES>)
                .help("Tab size (in spaces) used in source files")
                .long_help(help::FMT_TAB_SIZE)
                .default_value("4")
                .value_parser(value_parser!(usize)),
        )
}

pub fn exec_fmt(args: &ArgMatches, config: &Config) -> anyhow::Result<()> {
    let paths = args.get_many::<PathBuf>("PATH").unwrap();
    let check = args.get_flag("check");
    let tab_size = args.get_one::<usize>("tab-size").unwrap();
    let recursive = args.get_one::<usize>("recursive");

    let formatter = Formatter::new()
        .input_tab_size(*tab_size)
        .align_metadata(config.fmt.meta.align_values)
        .align_patterns(config.fmt.patterns.align_values)
        .indent_section_headers(config.fmt.rule.indent_section_headers)
        .indent_section_contents(config.fmt.rule.indent_section_contents)
        .indentation(if config.fmt.rule.indent_spaces == 0 {
            Indentation::Tabs
        } else {
            Indentation::Spaces(config.fmt.rule.indent_spaces as usize)
        })
        .newline_before_curly_brace(config.fmt.rule.newline_before_curly_brace)
        .empty_line_before_section_header(
            config.fmt.rule.empty_line_before_section_header,
        )
        .empty_line_after_section_header(
            config.fmt.rule.empty_line_after_section_header,
        );

    let mut modified_files: Vec<PathBuf> = Vec::new();

    for path in paths {
        let mut walker = walk::Walker::path(path);
        if let Some(recursive) = recursive {
            walker.max_depth(*recursive);
        } else {
            walker.max_depth(0);
        }
        walker.filter("**/*.yar").filter("**/*.yara");

        walker.walk(
            |file_path| {
                let input = fs::read(file_path)?;
                let file_modified = if check {
                    formatter.format(input.as_slice(), io::sink())?
                } else {
                    let mut formatted =
                        Cursor::new(Vec::with_capacity(input.len()));
                    if formatter.format(input.as_slice(), &mut formatted)? {
                        formatted.seek(SeekFrom::Start(0))?;
                        let mut output_file = File::create(file_path)?;
                        io::copy(&mut formatted, &mut output_file)?;
                        true
                    } else {
                        false
                    }
                };

                if file_modified {
                    modified_files.push(file_path.to_path_buf());
                }
                Ok(())
            },
            Err,
        )?;
    }

    if !modified_files.is_empty() {
        if check {
            for file in &modified_files {
                eprintln!("{}", file.display());
            }
        }
        process::exit(1)
    }

    Ok(())
}