1pub mod arc_cow;
2pub mod archive;
3pub mod command;
4pub mod fs;
5pub mod markdown;
6pub mod paths;
7pub mod redact;
8pub mod serde;
9pub mod shell_env;
10pub mod size;
11#[cfg(any(test, feature = "test-support"))]
12pub mod test;
13pub mod time;
14
15use anyhow::Result;
16use futures::Future;
17use itertools::Either;
18use regex::Regex;
19use std::sync::{LazyLock, OnceLock};
20use std::{
21 borrow::Cow,
22 cmp::{self, Ordering},
23 env,
24 ops::{AddAssign, Range, RangeInclusive},
25 panic::Location,
26 pin::Pin,
27 task::{Context, Poll},
28 time::Instant,
29};
30use unicase::UniCase;
31
32pub use take_until::*;
33#[cfg(any(test, feature = "test-support"))]
34pub use util_macros::{line_endings, path, uri};
35
36#[macro_export]
37macro_rules! debug_panic {
38 ( $($fmt_arg:tt)* ) => {
39 if cfg!(debug_assertions) {
40 panic!( $($fmt_arg)* );
41 } else {
42 let backtrace = std::backtrace::Backtrace::capture();
43 log::error!("{}\n{:?}", format_args!($($fmt_arg)*), backtrace);
44 }
45 };
46}
47
48pub fn truncate(s: &str, max_chars: usize) -> &str {
49 match s.char_indices().nth(max_chars) {
50 None => s,
51 Some((idx, _)) => &s[..idx],
52 }
53}
54
55/// Removes characters from the end of the string if its length is greater than `max_chars` and
56/// appends "..." to the string. Returns string unchanged if its length is smaller than max_chars.
57pub fn truncate_and_trailoff(s: &str, max_chars: usize) -> String {
58 debug_assert!(max_chars >= 5);
59
60 // If the string's byte length is <= max_chars, walking the string can be skipped since the
61 // number of chars is <= the number of bytes.
62 if s.len() <= max_chars {
63 return s.to_string();
64 }
65 let truncation_ix = s.char_indices().map(|(i, _)| i).nth(max_chars);
66 match truncation_ix {
67 Some(index) => s[..index].to_string() + "β¦",
68 _ => s.to_string(),
69 }
70}
71
72/// Removes characters from the front of the string if its length is greater than `max_chars` and
73/// prepends the string with "...". Returns string unchanged if its length is smaller than max_chars.
74pub fn truncate_and_remove_front(s: &str, max_chars: usize) -> String {
75 debug_assert!(max_chars >= 5);
76
77 // If the string's byte length is <= max_chars, walking the string can be skipped since the
78 // number of chars is <= the number of bytes.
79 if s.len() <= max_chars {
80 return s.to_string();
81 }
82 let suffix_char_length = max_chars.saturating_sub(1);
83 let truncation_ix = s
84 .char_indices()
85 .map(|(i, _)| i)
86 .nth_back(suffix_char_length);
87 match truncation_ix {
88 Some(index) if index > 0 => "β¦".to_string() + &s[index..],
89 _ => s.to_string(),
90 }
91}
92
93/// Takes only `max_lines` from the string and, if there were more than `max_lines-1`, appends a
94/// a newline and "..." to the string, so that `max_lines` are returned.
95/// Returns string unchanged if its length is smaller than max_lines.
96pub fn truncate_lines_and_trailoff(s: &str, max_lines: usize) -> String {
97 let mut lines = s.lines().take(max_lines).collect::<Vec<_>>();
98 if lines.len() > max_lines - 1 {
99 lines.pop();
100 lines.join("\n") + "\nβ¦"
101 } else {
102 lines.join("\n")
103 }
104}
105
106/// Truncates the string at a character boundary, such that the result is less than `max_bytes` in
107/// length.
108pub fn truncate_to_byte_limit(s: &str, max_bytes: usize) -> &str {
109 if s.len() < max_bytes {
110 return s;
111 }
112
113 for i in (0..max_bytes).rev() {
114 if s.is_char_boundary(i) {
115 return &s[..i];
116 }
117 }
118
119 ""
120}
121
122/// Takes a prefix of complete lines which fit within the byte limit. If the first line is longer
123/// than the limit, truncates at a character boundary.
124pub fn truncate_lines_to_byte_limit(s: &str, max_bytes: usize) -> &str {
125 if s.len() < max_bytes {
126 return s;
127 }
128
129 for i in (0..max_bytes).rev() {
130 if s.is_char_boundary(i) {
131 if s.as_bytes()[i] == b'\n' {
132 // Since the i-th character is \n, valid to slice at i + 1.
133 return &s[..i + 1];
134 }
135 }
136 }
137
138 truncate_to_byte_limit(s, max_bytes)
139}
140
141#[test]
142fn test_truncate_lines_to_byte_limit() {
143 let text = "Line 1\nLine 2\nLine 3\nLine 4";
144
145 // Limit that includes all lines
146 assert_eq!(truncate_lines_to_byte_limit(text, 100), text);
147
148 // Exactly the first line
149 assert_eq!(truncate_lines_to_byte_limit(text, 7), "Line 1\n");
150
151 // Limit between lines
152 assert_eq!(truncate_lines_to_byte_limit(text, 13), "Line 1\n");
153 assert_eq!(truncate_lines_to_byte_limit(text, 20), "Line 1\nLine 2\n");
154
155 // Limit before first newline
156 assert_eq!(truncate_lines_to_byte_limit(text, 6), "Line ");
157
158 // Test with non-ASCII characters
159 let text_utf8 = "Line 1\nLΓne 2\nLine 3";
160 assert_eq!(
161 truncate_lines_to_byte_limit(text_utf8, 15),
162 "Line 1\nLΓne 2\n"
163 );
164}
165
166pub fn post_inc<T: From<u8> + AddAssign<T> + Copy>(value: &mut T) -> T {
167 let prev = *value;
168 *value += T::from(1);
169 prev
170}
171
172/// Extend a sorted vector with a sorted sequence of items, maintaining the vector's sort order and
173/// enforcing a maximum length. This also de-duplicates items. Sort the items according to the given callback. Before calling this,
174/// both `vec` and `new_items` should already be sorted according to the `cmp` comparator.
175pub fn extend_sorted<T, I, F>(vec: &mut Vec<T>, new_items: I, limit: usize, mut cmp: F)
176where
177 I: IntoIterator<Item = T>,
178 F: FnMut(&T, &T) -> Ordering,
179{
180 let mut start_index = 0;
181 for new_item in new_items {
182 if let Err(i) = vec[start_index..].binary_search_by(|m| cmp(m, &new_item)) {
183 let index = start_index + i;
184 if vec.len() < limit {
185 vec.insert(index, new_item);
186 } else if index < vec.len() {
187 vec.pop();
188 vec.insert(index, new_item);
189 }
190 start_index = index;
191 }
192 }
193}
194
195pub fn truncate_to_bottom_n_sorted_by<T, F>(items: &mut Vec<T>, limit: usize, compare: &F)
196where
197 F: Fn(&T, &T) -> Ordering,
198{
199 if limit == 0 {
200 items.truncate(0);
201 }
202 if items.len() <= limit {
203 items.sort_by(compare);
204 return;
205 }
206 // When limit is near to items.len() it may be more efficient to sort the whole list and
207 // truncate, rather than always doing selection first as is done below. It's hard to analyze
208 // where the threshold for this should be since the quickselect style algorithm used by
209 // `select_nth_unstable_by` makes the prefix partially sorted, and so its work is not wasted -
210 // the expected number of comparisons needed by `sort_by` is less than it is for some arbitrary
211 // unsorted input.
212 items.select_nth_unstable_by(limit, compare);
213 items.truncate(limit);
214 items.sort_by(compare);
215}
216
217/// Prevents execution of the application with root privileges on Unix systems.
218///
219/// This function checks if the current process is running with root privileges
220/// and terminates the program with an error message unless explicitly allowed via the
221/// `ZED_ALLOW_ROOT` environment variable.
222#[cfg(unix)]
223pub fn prevent_root_execution() {
224 let is_root = nix::unistd::geteuid().is_root();
225 let allow_root = std::env::var("ZED_ALLOW_ROOT").is_ok_and(|val| val == "true");
226
227 if is_root && !allow_root {
228 eprintln!(
229 "\
230Error: Running Zed as root or via sudo is unsupported.
231 Doing so (even once) may subtly break things for all subsequent non-root usage of Zed.
232 It is untested and not recommended, don't complain when things break.
233 If you wish to proceed anyways, set `ZED_ALLOW_ROOT=true` in your environment."
234 );
235 std::process::exit(1);
236 }
237}
238
239#[cfg(unix)]
240fn load_shell_from_passwd() -> Result<()> {
241 let buflen = match unsafe { libc::sysconf(libc::_SC_GETPW_R_SIZE_MAX) } {
242 n if n < 0 => 1024,
243 n => n as usize,
244 };
245 let mut buffer = Vec::with_capacity(buflen);
246
247 let mut pwd: std::mem::MaybeUninit<libc::passwd> = std::mem::MaybeUninit::uninit();
248 let mut result: *mut libc::passwd = std::ptr::null_mut();
249
250 let uid = unsafe { libc::getuid() };
251 let status = unsafe {
252 libc::getpwuid_r(
253 uid,
254 pwd.as_mut_ptr(),
255 buffer.as_mut_ptr() as *mut libc::c_char,
256 buflen,
257 &mut result,
258 )
259 };
260 let entry = unsafe { pwd.assume_init() };
261
262 anyhow::ensure!(
263 status == 0,
264 "call to getpwuid_r failed. uid: {}, status: {}",
265 uid,
266 status
267 );
268 anyhow::ensure!(!result.is_null(), "passwd entry for uid {} not found", uid);
269 anyhow::ensure!(
270 entry.pw_uid == uid,
271 "passwd entry has different uid ({}) than getuid ({}) returned",
272 entry.pw_uid,
273 uid,
274 );
275
276 let shell = unsafe { std::ffi::CStr::from_ptr(entry.pw_shell).to_str().unwrap() };
277 if env::var("SHELL").map_or(true, |shell_env| shell_env != shell) {
278 log::info!(
279 "updating SHELL environment variable to value from passwd entry: {:?}",
280 shell,
281 );
282 unsafe { env::set_var("SHELL", shell) };
283 }
284
285 Ok(())
286}
287
288#[cfg(unix)]
289/// Returns a shell escaped path for the current zed executable
290pub fn get_shell_safe_zed_path() -> anyhow::Result<String> {
291 use anyhow::Context;
292
293 let zed_path = std::env::current_exe()
294 .context("Failed to determine current zed executable path.")?
295 .to_string_lossy()
296 .trim_end_matches(" (deleted)") // see https://github.com/rust-lang/rust/issues/69343
297 .to_string();
298
299 // As of writing, this can only be fail if the path contains a null byte, which shouldn't be possible
300 // but shlex has annotated the error as #[non_exhaustive] so we can't make it a compile error if other
301 // errors are introduced in the future :(
302 let zed_path_escaped =
303 shlex::try_quote(&zed_path).context("Failed to shell-escape Zed executable path.")?;
304
305 return Ok(zed_path_escaped.to_string());
306}
307
308#[cfg(unix)]
309pub fn load_login_shell_environment() -> Result<()> {
310 load_shell_from_passwd().log_err();
311
312 // If possible, we want to `cd` in the user's `$HOME` to trigger programs
313 // such as direnv, asdf, mise, ... to adjust the PATH. These tools often hook
314 // into shell's `cd` command (and hooks) to manipulate env.
315 // We do this so that we get the env a user would have when spawning a shell
316 // in home directory.
317 for (name, value) in shell_env::capture(paths::home_dir())? {
318 unsafe { env::set_var(&name, &value) };
319 }
320
321 log::info!(
322 "set environment variables from shell:{}, path:{}",
323 std::env::var("SHELL").unwrap_or_default(),
324 std::env::var("PATH").unwrap_or_default(),
325 );
326
327 Ok(())
328}
329
330/// Configures the process to start a new session, to prevent interactive shells from taking control
331/// of the terminal.
332///
333/// For more details: https://registerspill.thorstenball.com/p/how-to-lose-control-of-your-shell
334pub fn set_pre_exec_to_start_new_session(
335 command: &mut std::process::Command,
336) -> &mut std::process::Command {
337 // safety: code in pre_exec should be signal safe.
338 // https://man7.org/linux/man-pages/man7/signal-safety.7.html
339 #[cfg(not(target_os = "windows"))]
340 unsafe {
341 use std::os::unix::process::CommandExt;
342 command.pre_exec(|| {
343 libc::setsid();
344 Ok(())
345 });
346 };
347 command
348}
349
350pub fn merge_json_lenient_value_into(
351 source: serde_json_lenient::Value,
352 target: &mut serde_json_lenient::Value,
353) {
354 match (source, target) {
355 (serde_json_lenient::Value::Object(source), serde_json_lenient::Value::Object(target)) => {
356 for (key, value) in source {
357 if let Some(target) = target.get_mut(&key) {
358 merge_json_lenient_value_into(value, target);
359 } else {
360 target.insert(key, value);
361 }
362 }
363 }
364
365 (serde_json_lenient::Value::Array(source), serde_json_lenient::Value::Array(target)) => {
366 for value in source {
367 target.push(value);
368 }
369 }
370
371 (source, target) => *target = source,
372 }
373}
374
375pub fn merge_json_value_into(source: serde_json::Value, target: &mut serde_json::Value) {
376 use serde_json::Value;
377
378 match (source, target) {
379 (Value::Object(source), Value::Object(target)) => {
380 for (key, value) in source {
381 if let Some(target) = target.get_mut(&key) {
382 merge_json_value_into(value, target);
383 } else {
384 target.insert(key, value);
385 }
386 }
387 }
388
389 (Value::Array(source), Value::Array(target)) => {
390 for value in source {
391 target.push(value);
392 }
393 }
394
395 (source, target) => *target = source,
396 }
397}
398
399pub fn merge_non_null_json_value_into(source: serde_json::Value, target: &mut serde_json::Value) {
400 use serde_json::Value;
401 if let Value::Object(source_object) = source {
402 let target_object = if let Value::Object(target) = target {
403 target
404 } else {
405 *target = Value::Object(Default::default());
406 target.as_object_mut().unwrap()
407 };
408 for (key, value) in source_object {
409 if let Some(target) = target_object.get_mut(&key) {
410 merge_non_null_json_value_into(value, target);
411 } else if !value.is_null() {
412 target_object.insert(key, value);
413 }
414 }
415 } else if !source.is_null() {
416 *target = source
417 }
418}
419
420pub fn measure<R>(label: &str, f: impl FnOnce() -> R) -> R {
421 static ZED_MEASUREMENTS: OnceLock<bool> = OnceLock::new();
422 let zed_measurements = ZED_MEASUREMENTS.get_or_init(|| {
423 env::var("ZED_MEASUREMENTS")
424 .map(|measurements| measurements == "1" || measurements == "true")
425 .unwrap_or(false)
426 });
427
428 if *zed_measurements {
429 let start = Instant::now();
430 let result = f();
431 let elapsed = start.elapsed();
432 eprintln!("{}: {:?}", label, elapsed);
433 result
434 } else {
435 f()
436 }
437}
438
439pub fn expanded_and_wrapped_usize_range(
440 range: Range<usize>,
441 additional_before: usize,
442 additional_after: usize,
443 wrap_length: usize,
444) -> impl Iterator<Item = usize> {
445 let start_wraps = range.start < additional_before;
446 let end_wraps = wrap_length < range.end + additional_after;
447 if start_wraps && end_wraps {
448 Either::Left(0..wrap_length)
449 } else if start_wraps {
450 let wrapped_start = (range.start + wrap_length).saturating_sub(additional_before);
451 if wrapped_start <= range.end {
452 Either::Left(0..wrap_length)
453 } else {
454 Either::Right((0..range.end + additional_after).chain(wrapped_start..wrap_length))
455 }
456 } else if end_wraps {
457 let wrapped_end = range.end + additional_after - wrap_length;
458 if range.start <= wrapped_end {
459 Either::Left(0..wrap_length)
460 } else {
461 Either::Right((0..wrapped_end).chain(range.start - additional_before..wrap_length))
462 }
463 } else {
464 Either::Left((range.start - additional_before)..(range.end + additional_after))
465 }
466}
467
468/// Yields `[i, i + 1, i - 1, i + 2, ..]`, each modulo `wrap_length` and bounded by
469/// `additional_before` and `additional_after`. If the wrapping causes overlap, duplicates are not
470/// emitted. If wrap_length is 0, nothing is yielded.
471pub fn wrapped_usize_outward_from(
472 start: usize,
473 additional_before: usize,
474 additional_after: usize,
475 wrap_length: usize,
476) -> impl Iterator<Item = usize> {
477 let mut count = 0;
478 let mut after_offset = 1;
479 let mut before_offset = 1;
480
481 std::iter::from_fn(move || {
482 count += 1;
483 if count > wrap_length {
484 None
485 } else if count == 1 {
486 Some(start % wrap_length)
487 } else if after_offset <= additional_after && after_offset <= before_offset {
488 let value = (start + after_offset) % wrap_length;
489 after_offset += 1;
490 Some(value)
491 } else if before_offset <= additional_before {
492 let value = (start + wrap_length - before_offset) % wrap_length;
493 before_offset += 1;
494 Some(value)
495 } else if after_offset <= additional_after {
496 let value = (start + after_offset) % wrap_length;
497 after_offset += 1;
498 Some(value)
499 } else {
500 None
501 }
502 })
503}
504
505#[cfg(target_os = "windows")]
506pub fn get_windows_system_shell() -> String {
507 use std::path::PathBuf;
508
509 fn find_pwsh_in_programfiles(find_alternate: bool, find_preview: bool) -> Option<PathBuf> {
510 #[cfg(target_pointer_width = "64")]
511 let env_var = if find_alternate {
512 "ProgramFiles(x86)"
513 } else {
514 "ProgramFiles"
515 };
516
517 #[cfg(target_pointer_width = "32")]
518 let env_var = if find_alternate {
519 "ProgramW6432"
520 } else {
521 "ProgramFiles"
522 };
523
524 let install_base_dir = PathBuf::from(std::env::var_os(env_var)?).join("PowerShell");
525 install_base_dir
526 .read_dir()
527 .ok()?
528 .filter_map(Result::ok)
529 .filter(|entry| matches!(entry.file_type(), Ok(ft) if ft.is_dir()))
530 .filter_map(|entry| {
531 let dir_name = entry.file_name();
532 let dir_name = dir_name.to_string_lossy();
533
534 let version = if find_preview {
535 let dash_index = dir_name.find('-')?;
536 if &dir_name[dash_index + 1..] != "preview" {
537 return None;
538 };
539 dir_name[..dash_index].parse::<u32>().ok()?
540 } else {
541 dir_name.parse::<u32>().ok()?
542 };
543
544 let exe_path = entry.path().join("pwsh.exe");
545 if exe_path.exists() {
546 Some((version, exe_path))
547 } else {
548 None
549 }
550 })
551 .max_by_key(|(version, _)| *version)
552 .map(|(_, path)| path)
553 }
554
555 fn find_pwsh_in_msix(find_preview: bool) -> Option<PathBuf> {
556 let msix_app_dir =
557 PathBuf::from(std::env::var_os("LOCALAPPDATA")?).join("Microsoft\\WindowsApps");
558 if !msix_app_dir.exists() {
559 return None;
560 }
561
562 let prefix = if find_preview {
563 "Microsoft.PowerShellPreview_"
564 } else {
565 "Microsoft.PowerShell_"
566 };
567 msix_app_dir
568 .read_dir()
569 .ok()?
570 .filter_map(|entry| {
571 let entry = entry.ok()?;
572 if !matches!(entry.file_type(), Ok(ft) if ft.is_dir()) {
573 return None;
574 }
575
576 if !entry.file_name().to_string_lossy().starts_with(prefix) {
577 return None;
578 }
579
580 let exe_path = entry.path().join("pwsh.exe");
581 exe_path.exists().then_some(exe_path)
582 })
583 .next()
584 }
585
586 fn find_pwsh_in_scoop() -> Option<PathBuf> {
587 let pwsh_exe =
588 PathBuf::from(std::env::var_os("USERPROFILE")?).join("scoop\\shims\\pwsh.exe");
589 pwsh_exe.exists().then_some(pwsh_exe)
590 }
591
592 static SYSTEM_SHELL: LazyLock<String> = LazyLock::new(|| {
593 find_pwsh_in_programfiles(false, false)
594 .or_else(|| find_pwsh_in_programfiles(true, false))
595 .or_else(|| find_pwsh_in_msix(false))
596 .or_else(|| find_pwsh_in_programfiles(false, true))
597 .or_else(|| find_pwsh_in_msix(true))
598 .or_else(|| find_pwsh_in_programfiles(true, true))
599 .or_else(find_pwsh_in_scoop)
600 .map(|p| p.to_string_lossy().to_string())
601 .unwrap_or("powershell.exe".to_string())
602 });
603
604 (*SYSTEM_SHELL).clone()
605}
606
607pub trait ResultExt<E> {
608 type Ok;
609
610 fn log_err(self) -> Option<Self::Ok>;
611 /// Assert that this result should never be an error in development or tests.
612 fn debug_assert_ok(self, reason: &str) -> Self;
613 fn warn_on_err(self) -> Option<Self::Ok>;
614 fn log_with_level(self, level: log::Level) -> Option<Self::Ok>;
615 fn anyhow(self) -> anyhow::Result<Self::Ok>
616 where
617 E: Into<anyhow::Error>;
618}
619
620impl<T, E> ResultExt<E> for Result<T, E>
621where
622 E: std::fmt::Debug,
623{
624 type Ok = T;
625
626 #[track_caller]
627 fn log_err(self) -> Option<T> {
628 self.log_with_level(log::Level::Error)
629 }
630
631 #[track_caller]
632 fn debug_assert_ok(self, reason: &str) -> Self {
633 if let Err(error) = &self {
634 debug_panic!("{reason} - {error:?}");
635 }
636 self
637 }
638
639 #[track_caller]
640 fn warn_on_err(self) -> Option<T> {
641 self.log_with_level(log::Level::Warn)
642 }
643
644 #[track_caller]
645 fn log_with_level(self, level: log::Level) -> Option<T> {
646 match self {
647 Ok(value) => Some(value),
648 Err(error) => {
649 log_error_with_caller(*Location::caller(), error, level);
650 None
651 }
652 }
653 }
654
655 fn anyhow(self) -> anyhow::Result<T>
656 where
657 E: Into<anyhow::Error>,
658 {
659 self.map_err(Into::into)
660 }
661}
662
663fn log_error_with_caller<E>(caller: core::panic::Location<'_>, error: E, level: log::Level)
664where
665 E: std::fmt::Debug,
666{
667 #[cfg(not(target_os = "windows"))]
668 let file = caller.file();
669 #[cfg(target_os = "windows")]
670 let file = caller.file().replace('\\', "/");
671 // In this codebase, the first segment of the file path is
672 // the 'crates' folder, followed by the crate name.
673 let target = file.split('/').nth(1);
674
675 log::logger().log(
676 &log::Record::builder()
677 .target(target.unwrap_or(""))
678 .module_path(target)
679 .args(format_args!("{:?}", error))
680 .file(Some(caller.file()))
681 .line(Some(caller.line()))
682 .level(level)
683 .build(),
684 );
685}
686
687pub fn log_err<E: std::fmt::Debug>(error: &E) {
688 log_error_with_caller(*Location::caller(), error, log::Level::Warn);
689}
690
691pub trait TryFutureExt {
692 fn log_err(self) -> LogErrorFuture<Self>
693 where
694 Self: Sized;
695
696 fn log_tracked_err(self, location: core::panic::Location<'static>) -> LogErrorFuture<Self>
697 where
698 Self: Sized;
699
700 fn warn_on_err(self) -> LogErrorFuture<Self>
701 where
702 Self: Sized;
703 fn unwrap(self) -> UnwrapFuture<Self>
704 where
705 Self: Sized;
706}
707
708impl<F, T, E> TryFutureExt for F
709where
710 F: Future<Output = Result<T, E>>,
711 E: std::fmt::Debug,
712{
713 #[track_caller]
714 fn log_err(self) -> LogErrorFuture<Self>
715 where
716 Self: Sized,
717 {
718 let location = Location::caller();
719 LogErrorFuture(self, log::Level::Error, *location)
720 }
721
722 fn log_tracked_err(self, location: core::panic::Location<'static>) -> LogErrorFuture<Self>
723 where
724 Self: Sized,
725 {
726 LogErrorFuture(self, log::Level::Error, location)
727 }
728
729 #[track_caller]
730 fn warn_on_err(self) -> LogErrorFuture<Self>
731 where
732 Self: Sized,
733 {
734 let location = Location::caller();
735 LogErrorFuture(self, log::Level::Warn, *location)
736 }
737
738 fn unwrap(self) -> UnwrapFuture<Self>
739 where
740 Self: Sized,
741 {
742 UnwrapFuture(self)
743 }
744}
745
746#[must_use]
747pub struct LogErrorFuture<F>(F, log::Level, core::panic::Location<'static>);
748
749impl<F, T, E> Future for LogErrorFuture<F>
750where
751 F: Future<Output = Result<T, E>>,
752 E: std::fmt::Debug,
753{
754 type Output = Option<T>;
755
756 fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
757 let level = self.1;
758 let location = self.2;
759 let inner = unsafe { Pin::new_unchecked(&mut self.get_unchecked_mut().0) };
760 match inner.poll(cx) {
761 Poll::Ready(output) => Poll::Ready(match output {
762 Ok(output) => Some(output),
763 Err(error) => {
764 log_error_with_caller(location, error, level);
765 None
766 }
767 }),
768 Poll::Pending => Poll::Pending,
769 }
770 }
771}
772
773pub struct UnwrapFuture<F>(F);
774
775impl<F, T, E> Future for UnwrapFuture<F>
776where
777 F: Future<Output = Result<T, E>>,
778 E: std::fmt::Debug,
779{
780 type Output = T;
781
782 fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
783 let inner = unsafe { Pin::new_unchecked(&mut self.get_unchecked_mut().0) };
784 match inner.poll(cx) {
785 Poll::Ready(result) => Poll::Ready(result.unwrap()),
786 Poll::Pending => Poll::Pending,
787 }
788 }
789}
790
791pub struct Deferred<F: FnOnce()>(Option<F>);
792
793impl<F: FnOnce()> Deferred<F> {
794 /// Drop without running the deferred function.
795 pub fn abort(mut self) {
796 self.0.take();
797 }
798}
799
800impl<F: FnOnce()> Drop for Deferred<F> {
801 fn drop(&mut self) {
802 if let Some(f) = self.0.take() {
803 f()
804 }
805 }
806}
807
808/// Run the given function when the returned value is dropped (unless it's cancelled).
809#[must_use]
810pub fn defer<F: FnOnce()>(f: F) -> Deferred<F> {
811 Deferred(Some(f))
812}
813
814#[cfg(any(test, feature = "test-support"))]
815mod rng {
816 use rand::{Rng, seq::SliceRandom};
817 pub struct RandomCharIter<T: Rng> {
818 rng: T,
819 simple_text: bool,
820 }
821
822 impl<T: Rng> RandomCharIter<T> {
823 pub fn new(rng: T) -> Self {
824 Self {
825 rng,
826 simple_text: std::env::var("SIMPLE_TEXT").map_or(false, |v| !v.is_empty()),
827 }
828 }
829
830 pub fn with_simple_text(mut self) -> Self {
831 self.simple_text = true;
832 self
833 }
834 }
835
836 impl<T: Rng> Iterator for RandomCharIter<T> {
837 type Item = char;
838
839 fn next(&mut self) -> Option<Self::Item> {
840 if self.simple_text {
841 return if self.rng.gen_range(0..100) < 5 {
842 Some('\n')
843 } else {
844 Some(self.rng.gen_range(b'a'..b'z' + 1).into())
845 };
846 }
847
848 match self.rng.gen_range(0..100) {
849 // whitespace
850 0..=19 => [' ', '\n', '\r', '\t'].choose(&mut self.rng).copied(),
851 // two-byte greek letters
852 20..=32 => char::from_u32(self.rng.gen_range(('Ξ±' as u32)..('Ο' as u32 + 1))),
853 // // three-byte characters
854 33..=45 => ['β', 'β
', 'β', 'β', 'β']
855 .choose(&mut self.rng)
856 .copied(),
857 // // four-byte characters
858 46..=58 => ['π', 'π', 'π', 'π'].choose(&mut self.rng).copied(),
859 // ascii letters
860 _ => Some(self.rng.gen_range(b'a'..b'z' + 1).into()),
861 }
862 }
863 }
864}
865#[cfg(any(test, feature = "test-support"))]
866pub use rng::RandomCharIter;
867
868/// Get an embedded file as a string.
869pub fn asset_str<A: rust_embed::RustEmbed>(path: &str) -> Cow<'static, str> {
870 match A::get(path).expect(path).data {
871 Cow::Borrowed(bytes) => Cow::Borrowed(std::str::from_utf8(bytes).unwrap()),
872 Cow::Owned(bytes) => Cow::Owned(String::from_utf8(bytes).unwrap()),
873 }
874}
875
876/// Expands to an immediately-invoked function expression. Good for using the ? operator
877/// in functions which do not return an Option or Result.
878///
879/// Accepts a normal block, an async block, or an async move block.
880#[macro_export]
881macro_rules! maybe {
882 ($block:block) => {
883 (|| $block)()
884 };
885 (async $block:block) => {
886 (|| async $block)()
887 };
888 (async move $block:block) => {
889 (|| async move $block)()
890 };
891}
892
893pub trait RangeExt<T> {
894 fn sorted(&self) -> Self;
895 fn to_inclusive(&self) -> RangeInclusive<T>;
896 fn overlaps(&self, other: &Range<T>) -> bool;
897 fn contains_inclusive(&self, other: &Range<T>) -> bool;
898}
899
900impl<T: Ord + Clone> RangeExt<T> for Range<T> {
901 fn sorted(&self) -> Self {
902 cmp::min(&self.start, &self.end).clone()..cmp::max(&self.start, &self.end).clone()
903 }
904
905 fn to_inclusive(&self) -> RangeInclusive<T> {
906 self.start.clone()..=self.end.clone()
907 }
908
909 fn overlaps(&self, other: &Range<T>) -> bool {
910 self.start < other.end && other.start < self.end
911 }
912
913 fn contains_inclusive(&self, other: &Range<T>) -> bool {
914 self.start <= other.start && other.end <= self.end
915 }
916}
917
918impl<T: Ord + Clone> RangeExt<T> for RangeInclusive<T> {
919 fn sorted(&self) -> Self {
920 cmp::min(self.start(), self.end()).clone()..=cmp::max(self.start(), self.end()).clone()
921 }
922
923 fn to_inclusive(&self) -> RangeInclusive<T> {
924 self.clone()
925 }
926
927 fn overlaps(&self, other: &Range<T>) -> bool {
928 self.start() < &other.end && &other.start <= self.end()
929 }
930
931 fn contains_inclusive(&self, other: &Range<T>) -> bool {
932 self.start() <= &other.start && &other.end <= self.end()
933 }
934}
935
936/// A way to sort strings with starting numbers numerically first, falling back to alphanumeric one,
937/// case-insensitive.
938///
939/// This is useful for turning regular alphanumerically sorted sequences as `1-abc, 10, 11-def, .., 2, 21-abc`
940/// into `1-abc, 2, 10, 11-def, .., 21-abc`
941#[derive(Debug, PartialEq, Eq)]
942pub struct NumericPrefixWithSuffix<'a>(Option<u64>, &'a str);
943
944impl<'a> NumericPrefixWithSuffix<'a> {
945 pub fn from_numeric_prefixed_str(str: &'a str) -> Self {
946 let i = str.chars().take_while(|c| c.is_ascii_digit()).count();
947 let (prefix, remainder) = str.split_at(i);
948
949 let prefix = prefix.parse().ok();
950 Self(prefix, remainder)
951 }
952}
953
954/// When dealing with equality, we need to consider the case of the strings to achieve strict equality
955/// to handle cases like "a" < "A" instead of "a" == "A".
956impl Ord for NumericPrefixWithSuffix<'_> {
957 fn cmp(&self, other: &Self) -> Ordering {
958 match (self.0, other.0) {
959 (None, None) => UniCase::new(self.1)
960 .cmp(&UniCase::new(other.1))
961 .then_with(|| self.1.cmp(other.1).reverse()),
962 (None, Some(_)) => Ordering::Greater,
963 (Some(_), None) => Ordering::Less,
964 (Some(a), Some(b)) => a.cmp(&b).then_with(|| {
965 UniCase::new(self.1)
966 .cmp(&UniCase::new(other.1))
967 .then_with(|| self.1.cmp(other.1).reverse())
968 }),
969 }
970 }
971}
972
973impl PartialOrd for NumericPrefixWithSuffix<'_> {
974 fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
975 Some(self.cmp(other))
976 }
977}
978
979/// Capitalizes the first character of a string.
980///
981/// This function takes a string slice as input and returns a new `String` with the first character
982/// capitalized.
983///
984/// # Examples
985///
986/// ```
987/// use util::capitalize;
988///
989/// assert_eq!(capitalize("hello"), "Hello");
990/// assert_eq!(capitalize("WORLD"), "WORLD");
991/// assert_eq!(capitalize(""), "");
992/// ```
993pub fn capitalize(str: &str) -> String {
994 let mut chars = str.chars();
995 match chars.next() {
996 None => String::new(),
997 Some(first_char) => first_char.to_uppercase().collect::<String>() + chars.as_str(),
998 }
999}
1000
1001fn emoji_regex() -> &'static Regex {
1002 static EMOJI_REGEX: LazyLock<Regex> =
1003 LazyLock::new(|| Regex::new("(\\p{Emoji}|\u{200D})").unwrap());
1004 &EMOJI_REGEX
1005}
1006
1007/// Returns true if the given string consists of emojis only.
1008/// E.g. "π¨βπ©βπ§βπ§π" will return true, but "π!" will return false.
1009pub fn word_consists_of_emojis(s: &str) -> bool {
1010 let mut prev_end = 0;
1011 for capture in emoji_regex().find_iter(s) {
1012 if capture.start() != prev_end {
1013 return false;
1014 }
1015 prev_end = capture.end();
1016 }
1017 prev_end == s.len()
1018}
1019
1020/// Similar to `str::split`, but also provides byte-offset ranges of the results. Unlike
1021/// `str::split`, this is not generic on pattern types and does not return an `Iterator`.
1022pub fn split_str_with_ranges(s: &str, pat: impl Fn(char) -> bool) -> Vec<(Range<usize>, &str)> {
1023 let mut result = Vec::new();
1024 let mut start = 0;
1025
1026 for (i, ch) in s.char_indices() {
1027 if pat(ch) {
1028 if i > start {
1029 result.push((start..i, &s[start..i]));
1030 }
1031 start = i + ch.len_utf8();
1032 }
1033 }
1034
1035 if s.len() > start {
1036 result.push((start..s.len(), &s[start..s.len()]));
1037 }
1038
1039 result
1040}
1041
1042pub fn default<D: Default>() -> D {
1043 Default::default()
1044}
1045
1046pub fn get_system_shell() -> String {
1047 #[cfg(target_os = "windows")]
1048 {
1049 get_windows_system_shell()
1050 }
1051
1052 #[cfg(not(target_os = "windows"))]
1053 {
1054 std::env::var("SHELL").unwrap_or("/bin/sh".to_string())
1055 }
1056}
1057
1058#[derive(Debug)]
1059pub enum ConnectionResult<O> {
1060 Timeout,
1061 ConnectionReset,
1062 Result(anyhow::Result<O>),
1063}
1064
1065impl<O> ConnectionResult<O> {
1066 pub fn into_response(self) -> anyhow::Result<O> {
1067 match self {
1068 ConnectionResult::Timeout => anyhow::bail!("Request timed out"),
1069 ConnectionResult::ConnectionReset => anyhow::bail!("Server reset the connection"),
1070 ConnectionResult::Result(r) => r,
1071 }
1072 }
1073}
1074
1075impl<O> From<anyhow::Result<O>> for ConnectionResult<O> {
1076 fn from(result: anyhow::Result<O>) -> Self {
1077 ConnectionResult::Result(result)
1078 }
1079}
1080
1081#[cfg(test)]
1082mod tests {
1083 use super::*;
1084
1085 #[test]
1086 fn test_extend_sorted() {
1087 let mut vec = vec![];
1088
1089 extend_sorted(&mut vec, vec![21, 17, 13, 8, 1, 0], 5, |a, b| b.cmp(a));
1090 assert_eq!(vec, &[21, 17, 13, 8, 1]);
1091
1092 extend_sorted(&mut vec, vec![101, 19, 17, 8, 2], 8, |a, b| b.cmp(a));
1093 assert_eq!(vec, &[101, 21, 19, 17, 13, 8, 2, 1]);
1094
1095 extend_sorted(&mut vec, vec![1000, 19, 17, 9, 5], 8, |a, b| b.cmp(a));
1096 assert_eq!(vec, &[1000, 101, 21, 19, 17, 13, 9, 8]);
1097 }
1098
1099 #[test]
1100 fn test_get_shell_safe_zed_path_with_spaces() {
1101 // Test that shlex::try_quote handles paths with spaces correctly
1102 let path_with_spaces = "/Applications/Zed Nightly.app/Contents/MacOS/zed";
1103 let quoted = shlex::try_quote(path_with_spaces).unwrap();
1104
1105 // The quoted path should be properly escaped for shell use
1106 assert!(quoted.contains(path_with_spaces));
1107
1108 // When used in a shell command, it should not be split at spaces
1109 let command = format!("sh -c '{} --printenv'", quoted);
1110 println!("Command would be: {}", command);
1111
1112 // Test that shlex can parse it back correctly
1113 let parsed = shlex::split(&format!("{} --printenv", quoted)).unwrap();
1114 assert_eq!(parsed.len(), 2);
1115 assert_eq!(parsed[0], path_with_spaces);
1116 assert_eq!(parsed[1], "--printenv");
1117 }
1118
1119 #[test]
1120 fn test_shell_command_construction_with_quoted_path() {
1121 // Test the specific pattern used in shell_env.rs to ensure proper quoting
1122 let path_with_spaces = "/Applications/Zed Nightly.app/Contents/MacOS/zed";
1123 let quoted_path = shlex::try_quote(path_with_spaces).unwrap();
1124
1125 // This should be: '/Applications/Zed Nightly.app/Contents/MacOS/zed'
1126 assert_eq!(
1127 quoted_path,
1128 "'/Applications/Zed Nightly.app/Contents/MacOS/zed'"
1129 );
1130
1131 // Test the command construction pattern from shell_env.rs
1132 // The fixed version should use double quotes around the entire sh -c argument
1133 let env_fd = 0;
1134 let command = format!("sh -c \"{} --printenv >&{}\";", quoted_path, env_fd);
1135
1136 // This should produce: sh -c "'/Applications/Zed Nightly.app/Contents/MacOS/zed' --printenv >&0";
1137 let expected =
1138 "sh -c \"'/Applications/Zed Nightly.app/Contents/MacOS/zed' --printenv >&0\";";
1139 assert_eq!(command, expected);
1140
1141 // The command should not contain the problematic double single-quote pattern
1142 assert!(!command.contains("''"));
1143 }
1144
1145 #[test]
1146 fn test_truncate_to_bottom_n_sorted_by() {
1147 let mut vec: Vec<u32> = vec![5, 2, 3, 4, 1];
1148 truncate_to_bottom_n_sorted_by(&mut vec, 10, &u32::cmp);
1149 assert_eq!(vec, &[1, 2, 3, 4, 5]);
1150
1151 vec = vec![5, 2, 3, 4, 1];
1152 truncate_to_bottom_n_sorted_by(&mut vec, 5, &u32::cmp);
1153 assert_eq!(vec, &[1, 2, 3, 4, 5]);
1154
1155 vec = vec![5, 2, 3, 4, 1];
1156 truncate_to_bottom_n_sorted_by(&mut vec, 4, &u32::cmp);
1157 assert_eq!(vec, &[1, 2, 3, 4]);
1158
1159 vec = vec![5, 2, 3, 4, 1];
1160 truncate_to_bottom_n_sorted_by(&mut vec, 1, &u32::cmp);
1161 assert_eq!(vec, &[1]);
1162
1163 vec = vec![5, 2, 3, 4, 1];
1164 truncate_to_bottom_n_sorted_by(&mut vec, 0, &u32::cmp);
1165 assert!(vec.is_empty());
1166 }
1167
1168 #[test]
1169 fn test_iife() {
1170 fn option_returning_function() -> Option<()> {
1171 None
1172 }
1173
1174 let foo = maybe!({
1175 option_returning_function()?;
1176 Some(())
1177 });
1178
1179 assert_eq!(foo, None);
1180 }
1181
1182 #[test]
1183 fn test_truncate_and_trailoff() {
1184 assert_eq!(truncate_and_trailoff("", 5), "");
1185 assert_eq!(truncate_and_trailoff("aaaaaa", 7), "aaaaaa");
1186 assert_eq!(truncate_and_trailoff("aaaaaa", 6), "aaaaaa");
1187 assert_eq!(truncate_and_trailoff("aaaaaa", 5), "aaaaaβ¦");
1188 assert_eq!(truncate_and_trailoff("èèèèèè", 7), "èèèèèè");
1189 assert_eq!(truncate_and_trailoff("èèèèèè", 6), "èèèèèè");
1190 assert_eq!(truncate_and_trailoff("èèèèèè", 5), "èèèèèβ¦");
1191 }
1192
1193 #[test]
1194 fn test_truncate_and_remove_front() {
1195 assert_eq!(truncate_and_remove_front("", 5), "");
1196 assert_eq!(truncate_and_remove_front("aaaaaa", 7), "aaaaaa");
1197 assert_eq!(truncate_and_remove_front("aaaaaa", 6), "aaaaaa");
1198 assert_eq!(truncate_and_remove_front("aaaaaa", 5), "β¦aaaaa");
1199 assert_eq!(truncate_and_remove_front("èèèèèè", 7), "èèèèèè");
1200 assert_eq!(truncate_and_remove_front("èèèèèè", 6), "èèèèèè");
1201 assert_eq!(truncate_and_remove_front("èèèèèè", 5), "β¦Γ¨Γ¨Γ¨Γ¨Γ¨");
1202 }
1203
1204 #[test]
1205 fn test_numeric_prefix_str_method() {
1206 let target = "1a";
1207 assert_eq!(
1208 NumericPrefixWithSuffix::from_numeric_prefixed_str(target),
1209 NumericPrefixWithSuffix(Some(1), "a")
1210 );
1211
1212 let target = "12ab";
1213 assert_eq!(
1214 NumericPrefixWithSuffix::from_numeric_prefixed_str(target),
1215 NumericPrefixWithSuffix(Some(12), "ab")
1216 );
1217
1218 let target = "12_ab";
1219 assert_eq!(
1220 NumericPrefixWithSuffix::from_numeric_prefixed_str(target),
1221 NumericPrefixWithSuffix(Some(12), "_ab")
1222 );
1223
1224 let target = "1_2ab";
1225 assert_eq!(
1226 NumericPrefixWithSuffix::from_numeric_prefixed_str(target),
1227 NumericPrefixWithSuffix(Some(1), "_2ab")
1228 );
1229
1230 let target = "1.2";
1231 assert_eq!(
1232 NumericPrefixWithSuffix::from_numeric_prefixed_str(target),
1233 NumericPrefixWithSuffix(Some(1), ".2")
1234 );
1235
1236 let target = "1.2_a";
1237 assert_eq!(
1238 NumericPrefixWithSuffix::from_numeric_prefixed_str(target),
1239 NumericPrefixWithSuffix(Some(1), ".2_a")
1240 );
1241
1242 let target = "12.2_a";
1243 assert_eq!(
1244 NumericPrefixWithSuffix::from_numeric_prefixed_str(target),
1245 NumericPrefixWithSuffix(Some(12), ".2_a")
1246 );
1247
1248 let target = "12a.2_a";
1249 assert_eq!(
1250 NumericPrefixWithSuffix::from_numeric_prefixed_str(target),
1251 NumericPrefixWithSuffix(Some(12), "a.2_a")
1252 );
1253 }
1254
1255 #[test]
1256 fn test_numeric_prefix_with_suffix() {
1257 let mut sorted = vec!["1-abc", "10", "11def", "2", "21-abc"];
1258 sorted.sort_by_key(|s| NumericPrefixWithSuffix::from_numeric_prefixed_str(s));
1259 assert_eq!(sorted, ["1-abc", "2", "10", "11def", "21-abc"]);
1260
1261 for numeric_prefix_less in ["numeric_prefix_less", "aaa", "~β’Β£"] {
1262 assert_eq!(
1263 NumericPrefixWithSuffix::from_numeric_prefixed_str(numeric_prefix_less),
1264 NumericPrefixWithSuffix(None, numeric_prefix_less),
1265 "String without numeric prefix `{numeric_prefix_less}` should not be converted into NumericPrefixWithSuffix"
1266 )
1267 }
1268 }
1269
1270 #[test]
1271 fn test_word_consists_of_emojis() {
1272 let words_to_test = vec![
1273 ("π¨βπ©βπ§βπ§ππ₯", true),
1274 ("π", true),
1275 ("!π", false),
1276 ("π!", false),
1277 ("π ", false),
1278 (" π", false),
1279 ("Test", false),
1280 ];
1281
1282 for (text, expected_result) in words_to_test {
1283 assert_eq!(word_consists_of_emojis(text), expected_result);
1284 }
1285 }
1286
1287 #[test]
1288 fn test_truncate_lines_and_trailoff() {
1289 let text = r#"Line 1
1290Line 2
1291Line 3"#;
1292
1293 assert_eq!(
1294 truncate_lines_and_trailoff(text, 2),
1295 r#"Line 1
1296β¦"#
1297 );
1298
1299 assert_eq!(
1300 truncate_lines_and_trailoff(text, 3),
1301 r#"Line 1
1302Line 2
1303β¦"#
1304 );
1305
1306 assert_eq!(
1307 truncate_lines_and_trailoff(text, 4),
1308 r#"Line 1
1309Line 2
1310Line 3"#
1311 );
1312 }
1313
1314 #[test]
1315 fn test_expanded_and_wrapped_usize_range() {
1316 // Neither wrap
1317 assert_eq!(
1318 expanded_and_wrapped_usize_range(2..4, 1, 1, 8).collect::<Vec<usize>>(),
1319 (1..5).collect::<Vec<usize>>()
1320 );
1321 // Start wraps
1322 assert_eq!(
1323 expanded_and_wrapped_usize_range(2..4, 3, 1, 8).collect::<Vec<usize>>(),
1324 ((0..5).chain(7..8)).collect::<Vec<usize>>()
1325 );
1326 // Start wraps all the way around
1327 assert_eq!(
1328 expanded_and_wrapped_usize_range(2..4, 5, 1, 8).collect::<Vec<usize>>(),
1329 (0..8).collect::<Vec<usize>>()
1330 );
1331 // Start wraps all the way around and past 0
1332 assert_eq!(
1333 expanded_and_wrapped_usize_range(2..4, 10, 1, 8).collect::<Vec<usize>>(),
1334 (0..8).collect::<Vec<usize>>()
1335 );
1336 // End wraps
1337 assert_eq!(
1338 expanded_and_wrapped_usize_range(3..5, 1, 4, 8).collect::<Vec<usize>>(),
1339 (0..1).chain(2..8).collect::<Vec<usize>>()
1340 );
1341 // End wraps all the way around
1342 assert_eq!(
1343 expanded_and_wrapped_usize_range(3..5, 1, 5, 8).collect::<Vec<usize>>(),
1344 (0..8).collect::<Vec<usize>>()
1345 );
1346 // End wraps all the way around and past the end
1347 assert_eq!(
1348 expanded_and_wrapped_usize_range(3..5, 1, 10, 8).collect::<Vec<usize>>(),
1349 (0..8).collect::<Vec<usize>>()
1350 );
1351 // Both start and end wrap
1352 assert_eq!(
1353 expanded_and_wrapped_usize_range(3..5, 4, 4, 8).collect::<Vec<usize>>(),
1354 (0..8).collect::<Vec<usize>>()
1355 );
1356 }
1357
1358 #[test]
1359 fn test_wrapped_usize_outward_from() {
1360 // No wrapping
1361 assert_eq!(
1362 wrapped_usize_outward_from(4, 2, 2, 10).collect::<Vec<usize>>(),
1363 vec![4, 5, 3, 6, 2]
1364 );
1365 // Wrapping at end
1366 assert_eq!(
1367 wrapped_usize_outward_from(8, 2, 3, 10).collect::<Vec<usize>>(),
1368 vec![8, 9, 7, 0, 6, 1]
1369 );
1370 // Wrapping at start
1371 assert_eq!(
1372 wrapped_usize_outward_from(1, 3, 2, 10).collect::<Vec<usize>>(),
1373 vec![1, 2, 0, 3, 9, 8]
1374 );
1375 // All values wrap around
1376 assert_eq!(
1377 wrapped_usize_outward_from(5, 10, 10, 8).collect::<Vec<usize>>(),
1378 vec![5, 6, 4, 7, 3, 0, 2, 1]
1379 );
1380 // None before / after
1381 assert_eq!(
1382 wrapped_usize_outward_from(3, 0, 0, 8).collect::<Vec<usize>>(),
1383 vec![3]
1384 );
1385 // Starting point already wrapped
1386 assert_eq!(
1387 wrapped_usize_outward_from(15, 2, 2, 10).collect::<Vec<usize>>(),
1388 vec![5, 6, 4, 7, 3]
1389 );
1390 // wrap_length of 0
1391 assert_eq!(
1392 wrapped_usize_outward_from(4, 2, 2, 0).collect::<Vec<usize>>(),
1393 Vec::<usize>::new()
1394 );
1395 }
1396
1397 #[test]
1398 fn test_split_with_ranges() {
1399 let input = "hi";
1400 let result = split_str_with_ranges(input, |c| c == ' ');
1401
1402 assert_eq!(result.len(), 1);
1403 assert_eq!(result[0], (0..2, "hi"));
1404
1405 let input = "hΓ©lloπ¦world";
1406 let result = split_str_with_ranges(input, |c| c == 'π¦');
1407
1408 assert_eq!(result.len(), 2);
1409 assert_eq!(result[0], (0..6, "hΓ©llo")); // 'Γ©' is 2 bytes
1410 assert_eq!(result[1], (10..15, "world")); // 'π¦' is 4 bytes
1411 }
1412}