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use std::io::Error;
use std::path::PathBuf;
use std::process::ExitStatus;
// > overwrite
// >> append
// | pipe
// : on prev cmd any
// && on prev cmd okay
// || on prev cmd fail
mod command;
use command::*;
pub struct CommandLine(Vec<CommandInfo>);
impl CommandLine {
pub fn new(line: &str) -> Self {
let split = line.split(':');
let mut v = CommandLine(Vec::new());
for x in split {
v.0.push(tokenize(x));
}
v
}
pub fn run(
&self,
home: &PathBuf,
mut status: Option<ExitStatus>,
) -> Result<Option<ExitStatus>, Error> {
for cmd in &self.0 {
match cmd.run(&home, &status)? {
RunResult::Command(s) => status = Some(s),
RunResult::Builtin => {}
}
}
Ok(status)
}
}
enum TokenType {
Argument,
StdoutFileOverwrite,
StdoutFileAppend,
}
pub fn tokenize(line: &str) -> CommandInfo {
let mut r = CommandInfo::new();
let mut iter = line.chars().peekable();
let mut token = String::new();
let mut token_type = TokenType::Argument;
let mut quote = false;
while let Some(i) = iter.next() {
match i {
' ' => {
if quote {
token.push(' ');
}
}
'\'' => match iter.peek() {
Some(&'\'') | Some(&'>') | Some(&'&') => {
token.push(iter.next().unwrap());
}
_ => {
quote = !quote;
}
},
'>' => {
if iter.peek() == Some(&'>') {
token_type = TokenType::StdoutFileAppend;
iter.next();
} else {
token_type = TokenType::StdoutFileOverwrite;
}
}
'&' => {
if iter.peek() == Some(&'&') {
r.when = RunOn::ExitSuccess;
iter.next();
}
}
'|' => {
if iter.peek() == Some(&'|') {
r.when = RunOn::ExitFailure;
iter.next();
}
}
_ => {
token.push(i);
}
}
if !token.is_empty() && ((iter.peek() == Some(&' ') && !quote) || iter.peek() == None) {
match token_type {
TokenType::Argument => r.args.push(token),
TokenType::StdoutFileOverwrite => r.stdout = Redirect::FileOverwrite(token),
TokenType::StdoutFileAppend => r.stdout = Redirect::FileAppend(token),
}
token = String::new();
}
}
r
}
#[test]
fn test_tokenizer() {
{
let ls = tokenize("ls -l");
assert_eq!(ls.args, vec!("ls", "-l"));
let string = tokenize("ls -l 'something else'");
assert_eq!(string.args, vec!("ls", "-l", "something else"));
let escape = tokenize("ls -l 'junction jan''s'");
assert_eq!(escape.args, vec!("ls", "-l", "junction jan\'s"));
}
{
let o = tokenize("&& ls");
assert_eq!(o.args, vec!("ls"));
assert_eq!(o.when, RunOn::ExitSuccess);
let f = tokenize("|| ls");
assert_eq!(f.args, vec!("ls"));
assert_eq!(f.when, RunOn::ExitFailure);
}
/*
println!("{:?}", tokenize("ls -l something'>"));
println!("{:?}", tokenize("ls -l something'>'>"));
println!("{:?}", tokenize("ls -l something >output"));
println!("{:?}", tokenize("ls -l something > output"));
println!("{:?}", tokenize("ls -l something >'junction jan''s'"));
println!("{:?}", tokenize("ls -l something >>output"));
println!("{:?}", tokenize("ls -l something >> output"));
println!("{:?}", tokenize("ls -l something >>'junction jan''s'"));
*/
}
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