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pub mod cargo_cmds;
use cargo_cmds::*;
mod executor;
pub use executor::Executor;
mod toolchain;
use once_cell::sync::Lazy;
pub use toolchain::ToolChain;
mod utils;
use std::{
io::{self, Write},
process::{Child, ExitStatus},
};
type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
pub static DEFAULT_EVALUATOR: Lazy<[String; 2]> =
Lazy::new(|| ["println!(\"{:?}\", {\n".into(), "\n});".into()]);
pub struct EvalConfig<'a, S: ToString> {
pub input: S,
pub interactive_function: Option<fn(&mut Child) -> Result<()>>,
pub color: bool,
pub evaluator: &'a [String],
}
#[derive(Debug)]
pub struct EvalResult {
pub output: String,
pub status: ExitStatus,
}
impl From<(ExitStatus, String)> for EvalResult {
fn from(result: (ExitStatus, String)) -> Self {
Self {
output: result.1,
status: result.0,
}
}
}
#[derive(Debug, Clone)]
pub struct Repl {
body: Vec<String>,
cursor: usize,
toolchain: ToolChain,
executor: Executor,
}
impl Repl {
pub fn new(toolchain: ToolChain) -> Result<Self> {
Self::new_with_executor(toolchain, Executor::Sync)
}
pub fn new_with_executor(toolchain: ToolChain, executor: Executor) -> Result<Self> {
cargo_new()?;
if let Some(dependecy) = executor.dependecy() {
cargo_add_sync(&dependecy)?;
}
cargo_build(toolchain)?;
Ok(Self {
body: vec![
executor.main(),
"} // Do not write past this line (it will corrupt the repl)".to_string(),
],
cursor: 1,
toolchain,
executor,
})
}
pub fn set_executor(&mut self, executor: Executor) -> Result<()> {
if let Some(dependecy) = self.executor.dependecy() {
cargo_rm_sync(&dependecy[0])?;
}
self.executor = executor;
if let Some(dependecy) = executor.dependecy() {
cargo_add_sync(&dependecy)?;
}
self.body[0] = executor.main();
Ok(())
}
pub fn update_from_extern_main_file(&mut self) -> Result<()> {
let main_file = std::fs::read_to_string(&*MAIN_FILE_EXTERN)?;
let lines_num = main_file.lines().count();
if lines_num < 2 {
return Err("main.rs file corrupted, resetting irust..".into());
}
let cursor_pos = lines_num - 1;
*self = Self {
body: main_file.lines().map(ToOwned::to_owned).collect(),
cursor: cursor_pos,
toolchain: self.toolchain,
executor: self.executor,
};
Ok(())
}
pub fn insert(&mut self, input: impl ToString) {
let input = input.to_string();
const CRATE_ATTRIBUTE: &str = "#!";
let outside_main = input.trim_start().starts_with(CRATE_ATTRIBUTE);
if outside_main {
for line in input.lines() {
self.body.insert(0, line.to_owned());
self.cursor += 1;
}
} else {
for line in input.lines() {
self.body.insert(self.cursor, line.to_owned());
self.cursor += 1;
}
}
}
pub fn reset(&mut self) -> Result<()> {
*self = Self::new_with_executor(self.toolchain, self.executor)?;
Ok(())
}
pub fn show(&self) -> String {
let mut current_code = self.body.join("\n");
if let Ok(fmt_code) = cargo_fmt(¤t_code) {
current_code = fmt_code;
}
format!("Current Repl Code:\n{}", current_code)
}
pub fn eval(&mut self, input: impl ToString) -> Result<EvalResult> {
self.eval_inner(input, None, false, &*DEFAULT_EVALUATOR)
}
pub fn eval_with_configuration(
&mut self,
eval_config: EvalConfig<impl ToString>,
) -> Result<EvalResult> {
let EvalConfig {
input,
interactive_function,
color,
evaluator,
} = eval_config;
self.eval_inner(input, interactive_function, color, evaluator)
}
fn eval_inner(
&mut self,
input: impl ToString,
interactive_function: Option<fn(&mut Child) -> Result<()>>,
color: bool,
evaluator: &[String],
) -> Result<EvalResult> {
let input = input.to_string();
let eval_statement = format!("{}{}{}", evaluator[0], input, evaluator[1]);
let toolchain = self.toolchain;
let (status, mut eval_result) = self.eval_in_tmp_repl(eval_statement, || {
cargo_run(color, false, toolchain, interactive_function)
})?;
eval_result.pop();
Ok((status, eval_result).into())
}
pub fn eval_build(&mut self, input: impl ToString) -> Result<EvalResult> {
let input = input.to_string();
let toolchain = self.toolchain;
Ok(self
.eval_in_tmp_repl(input, || -> Result<(ExitStatus, String)> {
Ok(cargo_build_output(true, false, toolchain)?)
})?
.into())
}
pub fn eval_check(&mut self, buffer: String) -> Result<EvalResult> {
let toolchain = self.toolchain;
Ok(self
.eval_in_tmp_repl(buffer, || Ok(cargo_check_output(toolchain)?))?
.into())
}
pub fn eval_in_tmp_repl<T>(
&mut self,
input: String,
mut f: impl FnMut() -> Result<T>,
) -> Result<T> {
let orig_body = self.body.clone();
let orig_cursor = self.cursor;
self.insert(input);
self.write()?;
let result = f();
self.body = orig_body;
self.cursor = orig_cursor;
result
}
pub fn toolchain(&self) -> ToolChain {
self.toolchain
}
pub fn set_toolchain(&mut self, toolchain: ToolChain) {
self.toolchain = toolchain;
}
pub fn add_dep(&self, dep: &[String]) -> std::io::Result<std::process::Child> {
cargo_add(dep)
}
pub fn build(&self) -> std::io::Result<std::process::Child> {
cargo_build(self.toolchain)
}
pub fn write(&self) -> io::Result<()> {
let mut main_file = std::fs::File::create(&*MAIN_FILE)?;
write!(main_file, "{}", self.body.join("\n"))?;
Ok(())
}
pub fn write_to_extern(&self) -> io::Result<()> {
let mut main_file = std::fs::File::create(&*MAIN_FILE_EXTERN)?;
write!(main_file, "{}", self.body.join("\n"))?;
Ok(())
}
pub fn write_lib(&self) -> io::Result<()> {
let mut lib_file = std::fs::File::create(&*LIB_FILE)?;
let mut body = self.body.clone();
let main_idx = body
.iter()
.position(|line| line == &self.executor.main())
.unwrap();
body.remove(main_idx);
body.pop();
write!(lib_file, "{}", body.join("\n"))?;
Ok(())
}
pub fn pop(&mut self) {
if self.body.len() > 2 {
self.body.remove(self.cursor - 1);
self.cursor -= 1;
}
}
pub fn del(&mut self, line_num: &str) -> Result<()> {
if let Ok(line_num) = line_num.parse::<usize>() {
if line_num != 0 && line_num + 1 < self.body.len() {
self.body.remove(line_num);
self.cursor -= 1;
return Ok(());
}
}
Err("Incorrect line number".into())
}
pub fn lines<'a>(&'a self) -> impl Iterator<Item = &String> + 'a {
self.body.iter()
}
pub fn lines_count(&self) -> usize {
self.body.len()
}
}