Witch of Git - ivy/blob - src/main.rs

   1 use ivy::{
   2     ast::Ast,
   3     parse,
   4     trans::{self, translate},
   5     BUILTINS,
   6 };
   7 use std::{
   8     fs,
   9     io::{self, Read, Write},
  10     path::{Path, PathBuf},
  11     process::Command,
  12 };
  13 use structopt::{clap, StructOpt};
  14 use tempfile;
  15
  16 /// The Ivy compiler.
  17 ///
  18 /// If no mode is specified, this will fully compile the program.
  19 #[derive(Debug, StructOpt)]
  20 #[structopt(setting = clap::AppSettings::ArgRequiredElseHelp)]
  21 struct Opt {
  22     /// Output assembly.
  23     #[structopt(short = "S", long = "assembly", conflicts_with = "pretty")]
  24     assembly: bool,
  25
  26     /// Pretty-print the source code.
  27     #[structopt(short = "p", long = "pretty")]
  28     pretty: bool,
  29
  30     /// Input path. Use "-" for stdin.
  31     input: PathBuf,
  32
  33     /// Output path. Defaults to stdout or a.out, depending on the mode.
  34     #[structopt(short = "o", long = "output")]
  35     output: Option<PathBuf>,
  36 }
  37
  38 fn main() -> io::Result<()> {
  39     let opt = Opt::from_args();
  40     let text = match &opt.input {
  41         path if path == Path::new("-") => {
  42             let mut text = String::new();
  43             std::io::stdin().read_to_string(&mut text)?;
  44             text
  45         }
  46         path => fs::read_to_string(path)?,
  47     };
  48     let sexp = match parse(&text) {
  49         Ok(item) => item,
  50         Err(err) => {
  51             println!("{:?}", err);
  52             std::process::exit(1);
  53         }
  54     };
  55     let (ast, mut builtins) = match Ast::parse(BUILTINS, &sexp) {
  56         Ok(ast) => ast,
  57         Err(err) => {
  58             println!("{}", err);
  59             std::process::exit(1);
  60         }
  61     };
  62     if opt.pretty {
  63         match opt.output {
  64             Some(path) => {
  65                 let mut file = fs::File::create(path)?;
  66                 writeln!(file, "{}", ast.to_doc().pretty(80))?;
  67             }
  68             None => println!("{}", ast.to_doc().pretty(80)),
  69         }
  70         return Ok(());
  71     }
  72     let mut code = match translate(&ast) {
  73         Ok(code) => code,
  74         Err(err) => {
  75             println!("{}", err);
  76             std::process::exit(1);
  77         }
  78     };
  79     code.globals.insert(1); // builtins true
  80     code.globals.insert(2); // builtins false
  81     builtins.retain(|_, v| code.globals.contains(&v.global_number().unwrap()));
  82     if opt.assembly {
  83         match opt.output {
  84             Some(path) => {
  85                 let mut file = fs::File::create(path)?;
  86                 trans::x64::write_compile(&builtins, &mut file, &code)?;
  87             }
  88             None => {
  89                 let stdout = std::io::stdout();
  90                 trans::x64::write_compile(&builtins, &mut stdout.lock(), &code)?;
  91             }
  92         }
  93         return Ok(());
  94     }
  95     let mut file = tempfile::Builder::new().suffix(".s").tempfile()?;
  96     trans::x64::write_compile(&builtins, &mut file, &code)?;
  97     Command::new("clang")
  98         .args(&[
  99             "-masm=intel",
 100             "-nostartfiles",
 101             "-livy_rt",
 102             "-Wl,-e,_start",
 103         ])
 104         .arg(file.path())
 105         .arg("-o")
 106         .arg(opt.output.unwrap_or_else(|| "a.out".into()))
 107         .spawn()?
 108         .wait()?;
 109     Ok(())
 110 }