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Handle Ctrl-C gracefully

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This commit is contained in:
Odin Dutton 2019-06-07 10:31:22 +10:00
parent 1ba1d6cb2a
commit b79dc2257c
3 changed files with 42 additions and 4 deletions
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24
Cargo.lock generated
View file

@ -412,6 +412,15 @@ dependencies = [
"syn 0.15.34 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "ctrlc"
version = "3.1.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"nix 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "curl-sys"
version = "0.4.18"
@ -1190,6 +1199,18 @@ dependencies = [
"void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "nix"
version = "0.14.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
"cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
"cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.55 (registry+https://github.com/rust-lang/crates.io-index)",
"void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "nodrop"
version = "0.1.13"
@ -1219,6 +1240,7 @@ dependencies = [
"chrono-tz 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
"clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
"conch-parser 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
"ctrlc 3.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
"cursive 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
"derive-new 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
"dirs 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
@ -2399,6 +2421,7 @@ dependencies = [
"checksum csv 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "9044e25afb0924b5a5fc5511689b0918629e85d68ea591e5e87fbf1e85ea1b3b"
"checksum csv-core 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "fa5cdef62f37e6ffe7d1f07a381bc0db32b7a3ff1cac0de56cb0d81e71f53d65"
"checksum ctor 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "3b4c17619643c1252b5f690084b82639dd7fac141c57c8e77a00e0148132092c"
"checksum ctrlc 3.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c7dfd2d8b4c82121dfdff120f818e09fc4380b0b7e17a742081a89b94853e87f"
"checksum curl-sys 0.4.18 (registry+https://github.com/rust-lang/crates.io-index)" = "9d91a0052d5b982887d8e829bee0faffc7218ea3c6ebd3d6c2c8f678a93c9a42"
"checksum cursive 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b7ecc7282b5361471b607c26f44148205607e26d48a2fc65bd16e7619b1ebb78"
"checksum darling 0.8.6 (registry+https://github.com/rust-lang/crates.io-index)" = "9158d690bc62a3a57c3e45b85e4d50de2008b39345592c64efd79345c7e24be0"
@ -2487,6 +2510,7 @@ dependencies = [
"checksum miniz_oxide_c_api 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b7fe927a42e3807ef71defb191dc87d4e24479b221e67015fe38ae2b7b447bab"
"checksum ncurses 5.99.0 (registry+https://github.com/rust-lang/crates.io-index)" = "15699bee2f37e9f8828c7b35b2bc70d13846db453f2d507713b758fabe536b82"
"checksum nix 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "46f0f3210768d796e8fa79ec70ee6af172dacbe7147f5e69be5240a47778302b"
"checksum nix 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0d10caafde29a846a82ae0af70414e4643e072993441033b2c93217957e2f867"
"checksum nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "2f9667ddcc6cc8a43afc9b7917599d7216aa09c463919ea32c59ed6cac8bc945"
"checksum nom 5.0.0-beta1 (registry+https://github.com/rust-lang/crates.io-index)" = "6527f311b2baba609e980e008460ab5ebff6d6da15213bb8eb193b7746eefa24"
"checksum num 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cf4825417e1e1406b3782a8ce92f4d53f26ec055e3622e1881ca8e9f5f9e08db"

1
Cargo.toml
View file

@ -55,6 +55,7 @@ adhoc_derive = "0.1.2"
lazy_static = "1.3.0"
git2 = "0.8.0"
dirs = "2.0.1"
ctrlc = "3.1.3"
[dependencies.pancurses]
version = "0.16"

21
src/cli.rs
View file

@ -20,6 +20,7 @@ use rustyline::{self, ColorMode, Config, Editor};
use std::collections::VecDeque;
use std::error::Error;
use std::iter::Iterator;
use std::sync::atomic::{AtomicBool, Ordering};
#[derive(Debug)]
pub enum MaybeOwned<'a, T> {
@ -82,7 +83,22 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
rl.set_helper(Some(h));
let _ = rl.load_history("history.txt");
let ctrl_c = Arc::new(AtomicBool::new(false));
let cc = ctrl_c.clone();
ctrlc::set_handler(move || {
cc.store(true, Ordering::SeqCst);
})
.expect("Error setting Ctrl-C handler");
loop {
if ctrl_c.load(Ordering::SeqCst) {
ctrl_c.store(false, Ordering::SeqCst);
if let ShellError::String(s) = ShellError::string("CTRL-C") {
context.host.lock().unwrap().stdout(&format!("{:?}", s));
}
continue;
}
let readline = rl.readline(&format!(
"{}{}> ",
context.env.lock().unwrap().cwd().display().to_string(),
@ -286,10 +302,7 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
LineResult::Success(line.to_string())
}
Err(ReadlineError::Interrupted) => {
println!("CTRL-C");
LineResult::Break
}
Err(ReadlineError::Interrupted) => LineResult::Error(ShellError::string("CTRL-C")),
Err(ReadlineError::Eof) => {
println!("CTRL-D");
LineResult::Break