forked from RustPython/RustPython
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathshell.rs
More file actions
140 lines (125 loc) · 4.32 KB
/
shell.rs
File metadata and controls
140 lines (125 loc) · 4.32 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
<
8000
div data-line-number="104" class="react-line-number react-code-text" style="padding-right:16px">104105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
mod helper;
use rustpython_parser::error::{LexicalErrorType, ParseErrorType};
use rustpython_vm::readline::{Readline, ReadlineResult};
use rustpython_vm::{
builtins::PyBaseExceptionRef,
compile::{self, CompileError, CompileErrorType},
scope::Scope,
PyResult, TypeProtocol, VirtualMachine,
};
enum ShellExecResult {
Ok,
PyErr(PyBaseExceptionRef),
Continue,
}
fn shell_exec(vm: &VirtualMachine, source: &str, scope: Scope) -> ShellExecResult {
match vm.compile(source, compile::Mode::Single, "<stdin>".to_owned()) {
Ok(code) => match vm.run_code_obj(code, scope) {
Ok(_val) => ShellExecResult::Ok,
Err(err) => ShellExecResult::PyErr(err),
},
Err(CompileError {
error: CompileErrorType::Parse(ParseErrorType::Lexical(LexicalErrorType::Eof)),
..
})
| Err(CompileError {
error: CompileErrorType::Parse(ParseErrorType::Eof),
..
}) => ShellExecResult::Continue,
Err(err) => ShellExecResult::PyErr(vm.new_syntax_error(&err)),
}
}
pub fn run_shell(vm: &VirtualMachine, scope: Scope) -> PyResult<()> {
let mut repl = Readline::new(helper::ShellHelper::new(vm, scope.globals.clone()));
let mut full_input = String::new();
// Retrieve a `history_path_str` dependent on the OS
let repl_history_path = match dirs::config_dir() {
Some(mut path) => {
path.push("rustpython");
path.push("repl_history.txt");
path
}
None => ".repl_history.txt".into(),
};
if repl.load_history(&repl_history_path).is_err() {
println!("No previous history.");
}
let mut continuing = false;
loop {
let prompt_name = if continuing { "ps2" } else { "ps1" };
let prompt = vm
.sys_module
.clone()
.get_attr(prompt_name, vm)
.and_then(|prompt| prompt.str(vm));
let prompt = match prompt {
Ok(ref s) => s.as_str(),
Err(_) => "",
};
let result = match repl.readline(prompt) {
ReadlineResult::Line(line) => {
debug!("You entered {:?}", line);
repl.add_history_entry(line.trim_end()).unwrap();
let stop_continuing = line.is_empty();
if full_input.is_empty() {
full_input = line;
} else {
full_input.push_str(&line);
}
full_input.push('\n');
if continuing {
if stop_continuing {
continuing = false;
} else {
continue;
}
}
match shell_exec(vm, &full_input, scope.clone()) {
ShellExecResult::Ok => {
full_input.clear();
Ok(())
}
ShellExecResult::Continue => {
continuing = true;
Ok(())
}
ShellExecResult::PyErr(err) => {
full_input.clear();
Err(err)
}
}
}
ReadlineResult::Interrupt => {
continuing = false;
full_input.clear();
let keyboard_interrupt =
vm.new_exception_empty(vm.ctx.exceptions.keyboard_interrupt.clone());
Err(keyboard_interrupt)
}
ReadlineResult::Eof => {
break;
}
ReadlineResult::EncodingError => {
eprintln!("Invalid UTF-8 entered");
Ok(())
}
ReadlineResult::Other(err) => {
eprintln!("Readline error: {:?}", err);
break;
}
ReadlineResult::Io(err) => {
eprintln!("IO error: {:?}", err);
break;
}
};
if let Err(exc) = result {
if exc.isinstance(&vm.ctx.exceptions.system_exit) {
repl.save_history(&repl_history_path).unwrap();
return Err(exc);
}
vm.print_exception(exc);
}
}
repl.save_history(&repl_history_path).unwrap();
Ok(())
}