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#![allow(dead_code, unused_variables)]
extern crate docopt;
extern crate grep;
extern crate memchr;
extern crate memmap;
extern crate num_cpus;
extern crate regex;
extern crate regex_syntax as syntax;
extern crate rustc_serialize;
extern crate walkdir;
const USAGE: &'static str = "
Usage: xrep [options] <pattern> <path> ...
xrep is like the silver searcher, but faster than it and grep.
At least one path is required. Searching stdin isn't yet supported.
Options:
-c, --count Suppress normal output and show count of line matches.
";
use std::error::Error;
use std::io::{self, Write};
use std::process;
use std::result;
use docopt::Docopt;
use grep::Grep;
use walkdir::{WalkDir, WalkDirIterator};
use ignore::Ignore;
macro_rules! errored {
($($tt:tt)*) => {
return Err(From::from(format!($($tt)*)));
}
}
macro_rules! eprintln {
($($tt:tt)*) => {{
use std::io::Write;
let _ = writeln!(&mut ::std::io::stderr(), $($tt)*);
}}
}
mod gitignore;
mod glob;
mod ignore;
pub type Result<T> = result::Result<T, Box<Error + Send + Sync>>;
#[derive(RustcDecodable)]
struct Args {
arg_pattern: String,
arg_path: Vec<String>,
flag_count: bool,
}
fn main() {
let args: Args = Docopt::new(USAGE).and_then(|d| d.decode())
.unwrap_or_else(|e| e.exit());
match args.run() {
Ok(count) if count == 0 => process::exit(1),
Ok(_) => process::exit(0),
Err(err) => {
let _ = writeln!(&mut io::stderr(), "{}", err);
process::exit(1);
}
}
}
impl Args {
fn run(&self) -> Result<u64> {
if self.arg_path.is_empty() {
return errored!("Searching stdin is not currently supported.");
}
let mut stdout = io::BufWriter::new(io::stdout());
let mut ig = Ignore::new();
for p in &self.arg_path {
let mut it = WalkEventIter::from(WalkDir::new(p));
loop {
let ev = match it.next() {
None => break,
Some(Ok(ev)) => ev,
Some(Err(err)) => {
eprintln!("{}", err);
continue;
}
};
match ev {
WalkEvent::Exit => {
ig.pop();
}
WalkEvent::Dir(ent) => {
try!(ig.push(ent.path()));
if is_hidden(&ent) || ig.ignored(ent.path(), true) {
// if is_hidden(&ent) {
it.it.skip_current_dir();
continue;
}
}
WalkEvent::File(ent) => {
if is_hidden(&ent) || ig.ignored(ent.path(), false) {
// if is_hidden(&ent) {
continue;
}
let _ = writeln!(
&mut stdout, "{}", ent.path().display());
}
}
}
}
Ok(0)
}
fn run_mmap_count_only(&self, searcher: &Grep) -> Result<u64> {
use memmap::{Mmap, Protection};
assert!(self.arg_path.len() == 1);
let mut wtr = io::BufWriter::new(io::stdout());
let mmap = try!(Mmap::open_path(&self.arg_path[0], Protection::Read));
let text = unsafe { mmap.as_slice() };
let count = searcher.iter(text).count() as u64;
try!(writeln!(wtr, "{}", count));
Ok(count)
}
}
/// WalkEventIter transforms a WalkDir iterator into an iterator that more
/// accurately describes the directory tree. Namely, it emits events that are
/// one of three types: directory, file or "exit." An "exit" event means that
/// the entire contents of a directory have been enumerated.
struct WalkEventIter {
depth: usize,
it: walkdir::Iter,
next: Option<result::Result<walkdir::DirEntry, walkdir::Error>>,
}
#[derive(Debug)]
enum WalkEvent {
Dir(walkdir::DirEntry),
File(walkdir::DirEntry),
Exit,
}
impl From<walkdir::WalkDir> for WalkEventIter {
fn from(it: walkdir::WalkDir) -> WalkEventIter {
WalkEventIter { depth: 0, it: it.into_iter(), next: None }
}
}
impl Iterator for WalkEventIter {
type Item = io::Result<WalkEvent>;
fn next(&mut self) -> Option<io::Result<WalkEvent>> {
let dent = self.next.take().or_else(|| self.it.next());
let depth = match dent {
None => 0,
Some(Ok(ref dent)) => dent.depth(),
Some(Err(ref err)) => err.depth(),
};
if depth < self.depth {
self.depth -= 1;
self.next = dent;
return Some(Ok(WalkEvent::Exit));
}
self.depth = depth;
match dent {
None => None,
Some(Err(err)) => Some(Err(From::from(err))),
Some(Ok(dent)) => {
if dent.file_type().is_dir() {
self.depth += 1;
Some(Ok(WalkEvent::Dir(dent)))
} else {
Some(Ok(WalkEvent::File(dent)))
}
}
}
}
}
fn is_hidden(ent: &walkdir::DirEntry) -> bool {
ent.depth() > 0 &&
ent.file_name().to_str().map(|s| s.starts_with(".")).unwrap_or(false)
}
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