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Revert to notify v4 (#8367)

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This reverts https://github.com/nushell/nushell/pull/8114 which upgraded
to `notify` (a file watching crate used by the `watch` command) v5.

`notify` v5 has several breaking changes and it's much harder to use. It
no longer includes debouncing of file system events, which I think is
essential functionality for `watch`. @WindSoilder was going to try
writing our own debouncing functionality but I don't think he had time
to finish it.

@WindSoilder Is it OK if we revert this for the 0.77 release (March 14)?
We can try again for 0.78
This commit is contained in:
Reilly Wood 2023-03-08 21:45:58 -08:00 committed by GitHub
parent 7e949595bd
commit 03e688ea7b
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3 changed files with 308 additions and 157 deletions
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]
[[package]]
@ -5033,7 +5118,7 @@ dependencies = [
"libc",
"wasm-bindgen",
"web-sys",
"winapi",
"winapi 0.3.9",
]
[[package]]
@ -5042,12 +5127,12 @@ version = "0.27.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a902e9050fca0a5d6877550b769abd2bd1ce8c04634b941dbe2809735e1a1e33"
dependencies = [
"cfg-if",
"cfg-if 1.0.0",
"core-foundation-sys",
"libc",
"ntapi",
"once_cell",
"winapi",
"winapi 0.3.9",
]
[[package]]
@ -5056,13 +5141,13 @@ version = "0.28.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d3e847e2de7a137c8c2cede5095872dbb00f4f9bf34d061347e36b43322acd56"
dependencies = [
"cfg-if",
"cfg-if 1.0.0",
"core-foundation-sys",
"libc",
"ntapi",
"once_cell",
"rayon",
"winapi",
"winapi 0.3.9",
]
[[package]]
@ -5096,7 +5181,7 @@ version = "3.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "af18f7ae1acd354b992402e9ec5864359d693cd8a79dcbef59f76891701c1e95"
dependencies = [
"cfg-if",
"cfg-if 1.0.0",
"fastrand",
"redox_syscall",
"rustix 0.36.8",
@ -5130,7 +5215,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "633c1a546cee861a1a6d0dc69ebeca693bf4296661ba7852b9d21d159e0506df"
dependencies = [
"libc",
"winapi",
"winapi 0.3.9",
]
[[package]]
@ -5203,7 +5288,7 @@ checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
dependencies = [
"libc",
"wasi 0.10.0+wasi-snapshot-preview1",
"winapi",
"winapi 0.3.9",
]
[[package]]
@ -5279,7 +5364,7 @@ dependencies = [
"bytes",
"libc",
"memchr",
"mio",
"mio 0.8.4",
"num_cpus",
"parking_lot 0.12.1",
"pin-project-lite",
@ -5369,7 +5454,7 @@ version = "0.1.36"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2fce9567bd60a67d08a16488756721ba392f24f29006402881e43b19aac64307"
dependencies = [
"cfg-if",
"cfg-if 1.0.0",
"pin-project-lite",
"tracing-core",
]
@ -5687,7 +5772,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "808cf2735cd4b6866113f648b791c6adc5714537bc222d9347bb203386ffda56"
dependencies = [
"same-file",
"winapi",
"winapi 0.3.9",
"winapi-util",
]
@ -5725,7 +5810,7 @@ version = "0.2.83"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "eaf9f5aceeec8be17c128b2e93e031fb8a4d469bb9c4ae2d7dc1888b26887268"
dependencies = [
"cfg-if",
"cfg-if 1.0.0",
"wasm-bindgen-macro",
]
@ -5750,7 +5835,7 @@ version = "0.4.33"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "23639446165ca5a5de86ae1d8896b737ae80319560fbaa4c2887b7da6e7ebd7d"
dependencies = [
"cfg-if",
"cfg-if 1.0.0",
"js-sys",
"wasm-bindgen",
"web-sys",
@ -5839,6 +5924,12 @@ dependencies = [
"once_cell",
]
[[package]]
name = "winapi"
version = "0.2.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
[[package]]
name = "winapi"
version = "0.3.9"
@ -5849,6 +5940,12 @@ dependencies = [
"winapi-x86_64-pc-windows-gnu",
]
[[package]]
name = "winapi-build"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
[[package]]
name = "winapi-i686-pc-windows-gnu"
version = "0.4.0"
@ -5861,7 +5958,7 @@ version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
dependencies = [
"winapi",
"winapi 0.3.9",
]
[[package]]
@ -6009,8 +6106,8 @@ version = "0.11.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "76a1a57ff50e9b408431e8f97d5456f2807f8eb2a2cd79b06068fc87f8ecf189"
dependencies = [
"cfg-if",
"winapi",
"cfg-if 1.0.0",
"winapi 0.3.9",
]
[[package]]
@ -6022,6 +6119,16 @@ dependencies = [
"toml 0.5.9",
]
[[package]]
name = "ws2_32-sys"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
dependencies = [
"winapi 0.2.8",
"winapi-build",
]
[[package]]
name = "xmlparser"
version = "0.13.5"

2
crates/nu-command/Cargo.toml
View File

@ -61,7 +61,7 @@ lscolors = { version = "0.12.0", features = ["crossterm"], default-features = fa
md5 = { package = "md-5", version = "0.10.0" }
mime = "0.3.16"
mime_guess = "2.0.4"
notify = "5.1.0"
notify = "4.0.17"
num = { version = "0.4.0", optional = true }
num-traits = "0.2.14"
once_cell = "1.17"

176
crates/nu-command/src/filesystem/watch.rs
View File

@ -2,7 +2,7 @@ use std::path::PathBuf;
use std::sync::mpsc::{channel, RecvTimeoutError};
use std::time::Duration;
use notify::{recommended_watcher, EventKind, RecursiveMode, Watcher};
use notify::{DebouncedEvent, RecommendedWatcher, RecursiveMode, Watcher};
use nu_engine::{current_dir, eval_block, CallExt};
use nu_protocol::ast::Call;
use nu_protocol::engine::{Closure, Command, EngineState, Stack, StateWorkingSet};
@ -13,6 +13,7 @@ use nu_protocol::{
// durations chosen mostly arbitrarily
const CHECK_CTRL_C_FREQUENCY: Duration = Duration::from_millis(100);
const DEFAULT_WATCH_DEBOUNCE_DURATION: Duration = Duration::from_millis(100);
#[derive(Clone)]
pub struct Watch;
@ -37,6 +38,12 @@ impl Command for Watch {
.required("closure",
SyntaxShape::Closure(Some(vec![SyntaxShape::String, SyntaxShape::String, SyntaxShape::String])),
"Some Nu code to run whenever a file changes. The closure will be passed `operation`, `path`, and `new_path` (for renames only) arguments in that order")
.named(
"debounce-ms",
SyntaxShape::Int,
"Debounce changes for this many milliseconds (default: 100). Adjust if you find that single writes are reported as multiple events",
Some('d'),
)
.named(
"glob",
SyntaxShape::String, // SyntaxShape::GlobPattern gets interpreted relative to cwd, so use String instead
@ -84,6 +91,22 @@ impl Command for Watch {
.clone();
let verbose = call.has_flag("verbose");
let debounce_duration_flag: Option<Spanned<i64>> =
call.get_flag(engine_state, stack, "debounce-ms")?;
let debounce_duration = match debounce_duration_flag {
Some(val) => match u64::try_from(val.item) {
Ok(val) => Duration::from_millis(val),
Err(_) => {
return Err(ShellError::TypeMismatch {
err_message: "Debounce duration is invalid".to_string(),
span: val.span,
})
}
},
None => DEFAULT_WATCH_DEBOUNCE_DURATION,
};
let glob_flag: Option<Spanned<String>> = call.get_flag(engine_state, stack, "glob")?;
let glob_pattern = match glob_flag {
Some(glob) => {
@ -121,7 +144,7 @@ impl Command for Watch {
let ctrlc_ref = &engine_state.ctrlc.clone();
let (tx, rx) = channel();
let mut watcher = match recommended_watcher(tx) {
let mut watcher: RecommendedWatcher = match Watcher::new(tx, debounce_duration) {
Ok(w) => w,
Err(e) => {
return Err(ShellError::IOError(format!(
@ -129,83 +152,104 @@ impl Command for Watch {
)))
}
};
if let Err(e) = watcher.watch(&path, recursive_mode) {
if let Err(e) = watcher.watch(path.clone(), recursive_mode) {
return Err(ShellError::IOError(format!("Failed to start watcher: {e}")));
}
eprintln!("Now watching files at {path:?}. Press ctrl+c to abort.");
let event_handler = |operation: &str, path: PathBuf| -> Result<(), ShellError> {
let glob_pattern = glob_pattern.clone();
let matches_glob = match glob_pattern.clone() {
Some(glob) => glob.matches_path(&path),
None => true,
let event_handler =
|operation: &str, path: PathBuf, new_path: Option<PathBuf>| -> Result<(), ShellError> {
let glob_pattern = glob_pattern.clone();
let matches_glob = match glob_pattern.clone() {
Some(glob) => glob.matches_path(&path),
None => true,
};
if verbose && glob_pattern.is_some() {
eprintln!("Matches glob: {matches_glob}");
}
if matches_glob {
let stack = &mut stack.clone();
if let Some(position) = block.signature.get_positional(0) {
if let Some(position_id) = &position.var_id {
stack.add_var(*position_id, Value::string(operation, call.span()));
}
}
if let Some(position) = block.signature.get_positional(1) {
if let Some(position_id) = &position.var_id {
stack.add_var(
*position_id,
Value::string(path.to_string_lossy(), call.span()),
);
}
}
if let Some(position) = block.signature.get_positional(2) {
if let Some(position_id) = &position.var_id {
stack.add_var(
*position_id,
Value::string(
new_path.unwrap_or_else(|| "".into()).to_string_lossy(),
call.span(),
),
);
}
}
let eval_result = eval_block(
engine_state,
stack,
&block,
Value::Nothing { span: call.span() }.into_pipeline_data(),
call.redirect_stdout,
call.redirect_stderr,
);
match eval_result {
Ok(val) => {
val.print(engine_state, stack, false, false)?;
}
Err(err) => {
let working_set = StateWorkingSet::new(engine_state);
eprintln!("{}", format_error(&working_set, &err));
}
}
}
Ok(())
};
if verbose && glob_pattern.is_some() {
eprintln!("Matches glob: {matches_glob}");
}
if matches_glob {
let stack = &mut stack.clone();
if let Some(position) = block.signature.get_positional(0) {
if let Some(position_id) = &position.var_id {
stack.add_var(*position_id, Value::string(operation, call.span()));
}
}
if let Some(position) = block.signature.get_positional(1) {
if let Some(position_id) = &position.var_id {
stack.add_var(
*position_id,
Value::string(path.to_string_lossy(), call.span()),
);
}
}
let eval_result = eval_block(
engine_state,
stack,
&block,
Value::Nothing { span: call.span() }.into_pipeline_data(),
call.redirect_stdout,
call.redirect_stderr,
);
match eval_result {
Ok(val) => {
val.print(engine_state, stack, false, false)?;
}
Err(err) => {
let working_set = StateWorkingSet::new(engine_state);
eprintln!("{}", format_error(&working_set, &err));
}
}
}
Ok(())
};
loop {
match rx.recv_timeout(CHECK_CTRL_C_FREQUENCY) {
Ok(Ok(mut event)) => {
Ok(event) => {
if verbose {
eprintln!("{event:?}");
}
let path = match event.paths.pop() {
None => continue,
Some(p) => p,
};
match event.kind {
EventKind::Create(_) => event_handler("Create", path),
EventKind::Modify(notify::event::ModifyKind::Data(_)) => {
event_handler("Write", path)
let handler_result = match event {
DebouncedEvent::Create(path) => event_handler("Create", path, None),
DebouncedEvent::Write(path) => event_handler("Write", path, None),
DebouncedEvent::Remove(path) => event_handler("Remove", path, None),
DebouncedEvent::Rename(path, new_path) => {
event_handler("Rename", path, Some(new_path))
}
EventKind::Remove(_) => event_handler("Remove", path),
_ => Ok(()),
}?
DebouncedEvent::Error(err, path) => match path {
Some(path) => Err(ShellError::IOError(format!(
"Error detected for {path:?}: {err:?}"
))),
None => Err(ShellError::IOError(format!("Error detected: {err:?}"))),
},
// These are less likely to be interesting events
DebouncedEvent::Chmod(_)
| DebouncedEvent::NoticeRemove(_)
| DebouncedEvent::NoticeWrite(_)
| DebouncedEvent::Rescan => Ok(()),
};
handler_result?;
}
Ok(Err(e)) => return Err(ShellError::IOError(format!("watch error: {e}"))),
Err(RecvTimeoutError::Disconnected) => {
return Err(ShellError::IOError(
"Unexpected disconnect from file watcher".into(),
@ -230,7 +274,7 @@ impl Command for Watch {
},
Example {
description: "Watch all changes in the current directory",
example: r#"watch . { |op, path| $"($op) ($path)"}"#,
example: r#"watch . { |op, path, new_path| $"($op) ($path) ($new_path)"}"#,
result: None,
},
Example {