fd/src/walk.rs

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Rust
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// Copyright (c) 2017 fd developers
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0>
// or the MIT license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
// at your option. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
use crate::exec;
use crate::exit_codes::ExitCode;
use crate::fshelper;
use crate::internal::{opts::FdOptions, MAX_BUFFER_LENGTH};
use crate::output;
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use std::error::Error;
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use std::io;
Add multiple path support (#182) * Adding support for multiple paths. (panic) - Started adding multiple file support - fd panics with multiple files right now * Moved the ctrlc handler to main. - Moved the ctrlc handler to main so we can search multiple files * Tests now allow custom directory setup - TestEnv::new() now takes two arguments, the directories to create and the files to create inside those directories. * rust-fmt changes * rust-fmt changes * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Removed commented code in testenv * Refactored walk::scan to accept the path buffer vector. Using the ParallelWalker allows for multithreaded searching of multiple directories * Moved ctrlc handler back into walker, it is only called once from main now. * Moved the colored output check back to it's original place * Removing shell-escape, not sure how it got added... * Added test for `fd 'a.foo' test1` to show that a.foo is only found in the test1 and not the test2 direcotry * Removing side effect from walk::scan, `dir_vec` is no longer a mutable reference and an iterator is being used instead. * Running rustfmt to format code correctly
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use std::path::PathBuf;
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use std::process;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::mpsc::{channel, Receiver, Sender};
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use std::sync::{Arc, Mutex};
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use std::thread;
use std::time;
use ignore::overrides::OverrideBuilder;
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use ignore::{self, WalkBuilder};
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use regex::Regex;
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/// The receiver thread can either be buffering results or directly streaming to the console.
enum ReceiverMode {
/// Receiver is still buffering in order to sort the results, if the search finishes fast
/// enough.
Buffering,
/// Receiver is directly printing results to the output.
Streaming,
}
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/// The Worker threads can result in a valid entry having PathBuf or an error.
pub enum WorkerResult {
Entry(PathBuf),
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Error(ignore::Error),
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}
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/// Recursively scan the given search path for files / pathnames matching the pattern.
///
/// If the `--exec` argument was supplied, this will create a thread pool for executing
/// jobs in parallel from a given command line and the discovered paths. Otherwise, each
/// path will simply be written to standard output.
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pub fn scan(path_vec: &[PathBuf], pattern: Arc<Regex>, config: Arc<FdOptions>) {
Add multiple path support (#182) * Adding support for multiple paths. (panic) - Started adding multiple file support - fd panics with multiple files right now * Moved the ctrlc handler to main. - Moved the ctrlc handler to main so we can search multiple files * Tests now allow custom directory setup - TestEnv::new() now takes two arguments, the directories to create and the files to create inside those directories. * rust-fmt changes * rust-fmt changes * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Removed commented code in testenv * Refactored walk::scan to accept the path buffer vector. Using the ParallelWalker allows for multithreaded searching of multiple directories * Moved ctrlc handler back into walker, it is only called once from main now. * Moved the colored output check back to it's original place * Removing shell-escape, not sure how it got added... * Added test for `fd 'a.foo' test1` to show that a.foo is only found in the test1 and not the test2 direcotry * Removing side effect from walk::scan, `dir_vec` is no longer a mutable reference and an iterator is being used instead. * Running rustfmt to format code correctly
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let mut path_iter = path_vec.iter();
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let first_path_buf = path_iter
.next()
.expect("Error: Path vector can not be empty");
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let (tx, rx) = channel();
Add multiple path support (#182) * Adding support for multiple paths. (panic) - Started adding multiple file support - fd panics with multiple files right now * Moved the ctrlc handler to main. - Moved the ctrlc handler to main so we can search multiple files * Tests now allow custom directory setup - TestEnv::new() now takes two arguments, the directories to create and the files to create inside those directories. * rust-fmt changes * rust-fmt changes * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Removed commented code in testenv * Refactored walk::scan to accept the path buffer vector. Using the ParallelWalker allows for multithreaded searching of multiple directories * Moved ctrlc handler back into walker, it is only called once from main now. * Moved the colored output check back to it's original place * Removing shell-escape, not sure how it got added... * Added test for `fd 'a.foo' test1` to show that a.foo is only found in the test1 and not the test2 direcotry * Removing side effect from walk::scan, `dir_vec` is no longer a mutable reference and an iterator is being used instead. * Running rustfmt to format code correctly
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let mut override_builder = OverrideBuilder::new(first_path_buf.as_path());
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for pattern in &config.exclude_patterns {
let res = override_builder.add(pattern);
if res.is_err() {
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print_error_and_exit!("Malformed exclude pattern '{}'", pattern);
}
}
let overrides = override_builder.build().unwrap_or_else(|_| {
print_error_and_exit!("Mismatch in exclude patterns");
});
Add multiple path support (#182) * Adding support for multiple paths. (panic) - Started adding multiple file support - fd panics with multiple files right now * Moved the ctrlc handler to main. - Moved the ctrlc handler to main so we can search multiple files * Tests now allow custom directory setup - TestEnv::new() now takes two arguments, the directories to create and the files to create inside those directories. * rust-fmt changes * rust-fmt changes * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Removed commented code in testenv * Refactored walk::scan to accept the path buffer vector. Using the ParallelWalker allows for multithreaded searching of multiple directories * Moved ctrlc handler back into walker, it is only called once from main now. * Moved the colored output check back to it's original place * Removing shell-escape, not sure how it got added... * Added test for `fd 'a.foo' test1` to show that a.foo is only found in the test1 and not the test2 direcotry * Removing side effect from walk::scan, `dir_vec` is no longer a mutable reference and an iterator is being used instead. * Running rustfmt to format code correctly
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let mut walker = WalkBuilder::new(first_path_buf.as_path());
walker
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.hidden(config.ignore_hidden)
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.ignore(config.read_fdignore)
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.parents(config.read_fdignore || config.read_vcsignore)
.git_ignore(config.read_vcsignore)
.git_global(config.read_vcsignore)
.git_exclude(config.read_vcsignore)
.overrides(overrides)
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.follow_links(config.follow_links)
Add multiple path support (#182) * Adding support for multiple paths. (panic) - Started adding multiple file support - fd panics with multiple files right now * Moved the ctrlc handler to main. - Moved the ctrlc handler to main so we can search multiple files * Tests now allow custom directory setup - TestEnv::new() now takes two arguments, the directories to create and the files to create inside those directories. * rust-fmt changes * rust-fmt changes * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Removed commented code in testenv * Refactored walk::scan to accept the path buffer vector. Using the ParallelWalker allows for multithreaded searching of multiple directories * Moved ctrlc handler back into walker, it is only called once from main now. * Moved the colored output check back to it's original place * Removing shell-escape, not sure how it got added... * Added test for `fd 'a.foo' test1` to show that a.foo is only found in the test1 and not the test2 direcotry * Removing side effect from walk::scan, `dir_vec` is no longer a mutable reference and an iterator is being used instead. * Running rustfmt to format code correctly
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.max_depth(config.max_depth);
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if config.read_fdignore {
walker.add_custom_ignore_filename(".fdignore");
}
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for ignore_file in &config.ignore_files {
let result = walker.add_ignore(ignore_file);
match result {
Some(ignore::Error::Partial(_)) => (),
Some(err) => {
print_error!(
"{}",
format!(
"Malformed pattern in custom ignore file '{}': {}.",
ignore_file.to_string_lossy(),
err.description()
)
);
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}
None => (),
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}
}
Add multiple path support (#182) * Adding support for multiple paths. (panic) - Started adding multiple file support - fd panics with multiple files right now * Moved the ctrlc handler to main. - Moved the ctrlc handler to main so we can search multiple files * Tests now allow custom directory setup - TestEnv::new() now takes two arguments, the directories to create and the files to create inside those directories. * rust-fmt changes * rust-fmt changes * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Removed commented code in testenv * Refactored walk::scan to accept the path buffer vector. Using the ParallelWalker allows for multithreaded searching of multiple directories * Moved ctrlc handler back into walker, it is only called once from main now. * Moved the colored output check back to it's original place * Removing shell-escape, not sure how it got added... * Added test for `fd 'a.foo' test1` to show that a.foo is only found in the test1 and not the test2 direcotry * Removing side effect from walk::scan, `dir_vec` is no longer a mutable reference and an iterator is being used instead. * Running rustfmt to format code correctly
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for path_entry in path_iter {
walker.add(path_entry.as_path());
}
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let parallel_walker = walker.threads(config.threads).build_parallel();
Add multiple path support (#182) * Adding support for multiple paths. (panic) - Started adding multiple file support - fd panics with multiple files right now * Moved the ctrlc handler to main. - Moved the ctrlc handler to main so we can search multiple files * Tests now allow custom directory setup - TestEnv::new() now takes two arguments, the directories to create and the files to create inside those directories. * rust-fmt changes * rust-fmt changes * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Removed commented code in testenv * Refactored walk::scan to accept the path buffer vector. Using the ParallelWalker allows for multithreaded searching of multiple directories * Moved ctrlc handler back into walker, it is only called once from main now. * Moved the colored output check back to it's original place * Removing shell-escape, not sure how it got added... * Added test for `fd 'a.foo' test1` to show that a.foo is only found in the test1 and not the test2 direcotry * Removing side effect from walk::scan, `dir_vec` is no longer a mutable reference and an iterator is being used instead. * Running rustfmt to format code correctly
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let wants_to_quit = Arc::new(AtomicBool::new(false));
if config.ls_colors.is_some() && config.command.is_none() {
let wq = Arc::clone(&wants_to_quit);
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ctrlc::set_handler(move || {
wq.store(true, Ordering::Relaxed);
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})
.unwrap();
}
Add multiple path support (#182) * Adding support for multiple paths. (panic) - Started adding multiple file support - fd panics with multiple files right now * Moved the ctrlc handler to main. - Moved the ctrlc handler to main so we can search multiple files * Tests now allow custom directory setup - TestEnv::new() now takes two arguments, the directories to create and the files to create inside those directories. * rust-fmt changes * rust-fmt changes * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Removed commented code in testenv * Refactored walk::scan to accept the path buffer vector. Using the ParallelWalker allows for multithreaded searching of multiple directories * Moved ctrlc handler back into walker, it is only called once from main now. * Moved the colored output check back to it's original place * Removing shell-escape, not sure how it got added... * Added test for `fd 'a.foo' test1` to show that a.foo is only found in the test1 and not the test2 direcotry * Removing side effect from walk::scan, `dir_vec` is no longer a mutable reference and an iterator is being used instead. * Running rustfmt to format code correctly
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// Spawn the thread that receives all results through the channel.
let receiver_thread = spawn_receiver(&config, &wants_to_quit, rx);
// Spawn the sender threads.
spawn_senders(&config, &wants_to_quit, pattern, parallel_walker, tx);
// Wait for the receiver thread to print out all results.
receiver_thread.join().unwrap();
if wants_to_quit.load(Ordering::Relaxed) {
process::exit(ExitCode::KilledBySigint.into());
}
}
fn spawn_receiver(
config: &Arc<FdOptions>,
wants_to_quit: &Arc<AtomicBool>,
rx: Receiver<WorkerResult>,
) -> thread::JoinHandle<()> {
let config = Arc::clone(config);
let wants_to_quit = Arc::clone(wants_to_quit);
let show_filesystem_errors = config.show_filesystem_errors;
let threads = config.threads;
thread::spawn(move || {
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// This will be set to `Some` if the `--exec` argument was supplied.
if let Some(ref cmd) = config.command {
if cmd.in_batch_mode() {
exec::batch(rx, cmd, show_filesystem_errors);
} else {
let shared_rx = Arc::new(Mutex::new(rx));
let out_perm = Arc::new(Mutex::new(()));
// TODO: the following line is a workaround to replace the `unsafe` block that was
// previously used here to avoid the (unnecessary?) cloning of the command. The
// `unsafe` block caused problems on some platforms (SIGILL instructions on Linux) and
// therefore had to be removed.
let cmd = Arc::new(cmd.clone());
// Each spawned job will store it's thread handle in here.
let mut handles = Vec::with_capacity(threads);
for _ in 0..threads {
let rx = Arc::clone(&shared_rx);
let cmd = Arc::clone(&cmd);
let out_perm = Arc::clone(&out_perm);
// Spawn a job thread that will listen for and execute inputs.
let handle =
thread::spawn(move || exec::job(rx, cmd, out_perm, show_filesystem_errors));
// Push the handle of the spawned thread into the vector for later joining.
handles.push(handle);
}
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// Wait for all threads to exit before exiting the program.
for h in handles {
h.join().unwrap();
}
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}
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} else {
let start = time::Instant::now();
let mut buffer = vec![];
// Start in buffering mode
let mut mode = ReceiverMode::Buffering;
// Maximum time to wait before we start streaming to the console.
let max_buffer_time = config
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.max_buffer_time
.unwrap_or_else(|| time::Duration::from_millis(100));
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let stdout = io::stdout();
let mut stdout = stdout.lock();
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for worker_result in rx {
match worker_result {
WorkerResult::Entry(value) => {
match mode {
ReceiverMode::Buffering => {
buffer.push(value);
// Have we reached the maximum buffer size or maximum buffering time?
if buffer.len() > MAX_BUFFER_LENGTH
|| time::Instant::now() - start > max_buffer_time
{
// Flush the buffer
for v in &buffer {
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output::print_entry(
&mut stdout,
v,
&config,
&wants_to_quit,
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);
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}
buffer.clear();
// Start streaming
mode = ReceiverMode::Streaming;
}
}
ReceiverMode::Streaming => {
output::print_entry(&mut stdout, &value, &config, &wants_to_quit);
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}
}
}
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WorkerResult::Error(err) => {
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if show_filesystem_errors {
print_error!("{}", err);
}
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}
}
}
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// If we have finished fast enough (faster than max_buffer_time), we haven't streamed
// anything to the console, yet. In this case, sort the results and print them:
if !buffer.is_empty() {
buffer.sort();
for value in buffer {
output::print_entry(&mut stdout, &value, &config, &wants_to_quit);
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}
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}
}
})
}
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fn spawn_senders(
config: &Arc<FdOptions>,
wants_to_quit: &Arc<AtomicBool>,
pattern: Arc<Regex>,
parallel_walker: ignore::WalkParallel,
tx: Sender<WorkerResult>,
) {
Add multiple path support (#182) * Adding support for multiple paths. (panic) - Started adding multiple file support - fd panics with multiple files right now * Moved the ctrlc handler to main. - Moved the ctrlc handler to main so we can search multiple files * Tests now allow custom directory setup - TestEnv::new() now takes two arguments, the directories to create and the files to create inside those directories. * rust-fmt changes * rust-fmt changes * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Removed commented code in testenv * Refactored walk::scan to accept the path buffer vector. Using the ParallelWalker allows for multithreaded searching of multiple directories * Moved ctrlc handler back into walker, it is only called once from main now. * Moved the colored output check back to it's original place * Removing shell-escape, not sure how it got added... * Added test for `fd 'a.foo' test1` to show that a.foo is only found in the test1 and not the test2 direcotry * Removing side effect from walk::scan, `dir_vec` is no longer a mutable reference and an iterator is being used instead. * Running rustfmt to format code correctly
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parallel_walker.run(|| {
let config = Arc::clone(config);
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let pattern = Arc::clone(&pattern);
let tx_thread = tx.clone();
let wants_to_quit = Arc::clone(wants_to_quit);
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Box::new(move |entry_o| {
if wants_to_quit.load(Ordering::Relaxed) {
return ignore::WalkState::Quit;
}
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let entry = match entry_o {
Ok(e) => e,
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Err(err) => {
tx_thread.send(WorkerResult::Error(err)).unwrap();
return ignore::WalkState::Continue;
}
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};
Add multiple path support (#182) * Adding support for multiple paths. (panic) - Started adding multiple file support - fd panics with multiple files right now * Moved the ctrlc handler to main. - Moved the ctrlc handler to main so we can search multiple files * Tests now allow custom directory setup - TestEnv::new() now takes two arguments, the directories to create and the files to create inside those directories. * rust-fmt changes * rust-fmt changes * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Moving code around, no need to do everything in one big loop - PathDisplay was never actually used for anything, removed it during refactor of main - Removed redundant logic for absolute paths - Moved code placed needlessly inside a loop in the last commit outside of that loop. * Removed commented code in testenv * Refactored walk::scan to accept the path buffer vector. Using the ParallelWalker allows for multithreaded searching of multiple directories * Moved ctrlc handler back into walker, it is only called once from main now. * Moved the colored output check back to it's original place * Removing shell-escape, not sure how it got added... * Added test for `fd 'a.foo' test1` to show that a.foo is only found in the test1 and not the test2 direcotry * Removing side effect from walk::scan, `dir_vec` is no longer a mutable reference and an iterator is being used instead. * Running rustfmt to format code correctly
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if entry.depth() == 0 {
return ignore::WalkState::Continue;
}
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// Filter out unwanted file types.
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if let Some(ref file_types) = config.file_types {
if let Some(ref entry_type) = entry.file_type() {
if (!file_types.files && entry_type.is_file())
|| (!file_types.directories && entry_type.is_dir())
|| (!file_types.symlinks && entry_type.is_symlink())
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|| (file_types.executables_only
&& !entry
.metadata()
.map(|m| fshelper::is_executable(&m))
.unwrap_or(false))
|| (file_types.empty_only && !fshelper::is_empty(&entry))
{
return ignore::WalkState::Continue;
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} else if !(entry_type.is_file()
|| entry_type.is_dir()
|| entry_type.is_symlink())
{
// This is probably a block device, char device, fifo or socket. Skip it.
return ignore::WalkState::Continue;
}
} else {
return ignore::WalkState::Continue;
}
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}
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let entry_path = entry.path();
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// Filter out unwanted extensions.
if let Some(ref exts_regex) = config.extensions {
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if let Some(path_str) = entry_path.file_name().and_then(|s| s.to_str()) {
if !exts_regex.is_match(path_str) {
return ignore::WalkState::Continue;
}
} else {
return ignore::WalkState::Continue;
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}
}
// Filter out unwanted sizes if it is a file and we have been given size constraints.
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if !config.size_constraints.is_empty() {
if entry_path.is_file() {
if let Ok(metadata) = entry_path.metadata() {
let file_size = metadata.len();
if config
.size_constraints
.iter()
.any(|sc| !sc.is_within(file_size))
{
return ignore::WalkState::Continue;
}
} else {
return ignore::WalkState::Continue;
}
} else {
return ignore::WalkState::Continue;
}
}
// Filter out unwanted modification times
if !config.time_constraints.is_empty() {
let mut matched = false;
if entry_path.is_file() {
if let Ok(metadata) = entry_path.metadata() {
if let Ok(modified) = metadata.modified() {
matched = config
.time_constraints
.iter()
.all(|tf| tf.applies_to(&modified));
}
}
}
if !matched {
return ignore::WalkState::Continue;
}
}
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let search_str_o = if config.search_full_path {
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match fshelper::path_absolute_form(entry_path) {
Ok(path_abs_buf) => Some(path_abs_buf.to_string_lossy().into_owned().into()),
Err(_) => {
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print_error_and_exit!("Unable to retrieve absolute path.");
}
}
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} else {
entry_path.file_name().map(|f| f.to_string_lossy())
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};
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if let Some(search_str) = search_str_o {
if pattern.is_match(&*search_str) {
// TODO: take care of the unwrap call
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tx_thread
.send(WorkerResult::Entry(entry_path.to_owned()))
.unwrap()
}
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}
ignore::WalkState::Continue
})
});
}