Merge branch 'mmap' of github.com:chmln/sd

This commit is contained in:
Greg 2019-04-07 11:34:27 -04:00
commit a8f87ccc07
No known key found for this signature in database
GPG key ID: 2E44FAEEDC94B1E2
5 changed files with 282 additions and 212 deletions

View file

@ -2,9 +2,9 @@ edition = "2018"
max_width = 80
wrap_comments = true
control_brace_style = "ClosingNextLine"
brace_style = "PreferSameLine"
format_strings = true
merge_imports = true
match_block_trailing_comma = true
reorder_impl_items = true
use_field_init_shorthand = true

348
Cargo.lock generated
View file

@ -2,10 +2,10 @@
# It is not intended for manual editing.
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@ -406,19 +471,9 @@ name = "vec_map"
version = "0.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "version_check"
version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "void"
version = "1.0.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "winapi"
version = "0.3.6"
version = "0.3.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@ -436,49 +491,56 @@ version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
[metadata]
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"checksum textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"
"checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
"checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
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@ -487,8 +549,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
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View file

@ -12,12 +12,13 @@ repository = "https://github.com/chmln/sd.git"
categories = ["command-line-utilities", "text-processing", "development-tools"]
[dependencies]
regex = "1.1.2"
structopt = "0.2.14"
atomicwrites = "0.2.2"
regex = "1.1.5"
structopt = "0.2.15"
rayon = "1.0.3"
regex-syntax = "0.6.5"
regex-syntax = "0.6.6"
unescape = "0.1.0"
memmap = "0.7.0"
tempfile = "3.0.7"
[profile.release]
opt-level = 3

View file

@ -3,12 +3,6 @@ pub(crate) struct Error {
pub(crate) message: String,
}
impl Error {
pub(crate) fn new<T: std::fmt::Display>(message: T) -> Self {
Self { message: format!("{}", message) }
}
}
impl<T> From<T> for Error
where
T: std::error::Error,
@ -20,6 +14,13 @@ where
}
}
impl Error {
pub(crate) fn log(err: Self) -> Self {
println!("{}", err);
err
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "{}", self.message)

View file

@ -1,6 +1,6 @@
use crate::{utils, Error, Result};
use regex::Regex;
use std::{borrow::Cow, fs::File, fs::set_permissions, io::prelude::*};
use regex::bytes::Regex;
use std::{fs::File, io::prelude::*};
pub(crate) enum Source {
Stdin,
@ -14,18 +14,11 @@ impl Source {
}
return Source::Files(file_paths);
}
fn file_to_string(path: impl AsRef<str>) -> Result<String> {
let mut file = File::open(path.as_ref())?;
let mut buffer = String::new();
file.read_to_string(&mut buffer)?;
Ok(buffer)
}
}
pub(crate) struct Replacer {
regex: Regex,
replace_with: String,
replace_with: Vec<u8>,
is_literal: bool,
}
@ -37,16 +30,18 @@ impl Replacer {
flags: Option<String>,
) -> Result<Self> {
let (look_for, replace_with) = if is_literal {
(regex::escape(&look_for), replace_with)
(regex::escape(&look_for), replace_with.into_bytes())
}
else {
(
look_for,
utils::unescape(&replace_with).unwrap_or_else(|| replace_with),
utils::unescape(&replace_with)
.unwrap_or_else(|| replace_with)
.into_bytes(),
)
};
let mut regex = regex::RegexBuilder::new(&look_for);
let mut regex = regex::bytes::RegexBuilder::new(&look_for);
regex.case_insensitive(
!is_literal && !utils::regex_case_sensitive(&look_for),
);
@ -75,55 +70,64 @@ impl Replacer {
})
}
fn replace<'r>(&self, content: impl Into<Cow<'r, str>>) -> Cow<'r, str> {
let content = content.into();
if self.regex.find(&content).is_none() {
return content;
}
fn has_matches(&self, content: &[u8]) -> bool {
self.regex.find(&content).is_some()
}
fn replace(&self, content: impl AsRef<[u8]>) -> Vec<u8> {
let content = content.as_ref();
if self.is_literal {
self.regex
.replace_all(&content, regex::NoExpand(&self.replace_with))
.to_string()
.into()
.replace_all(
&content,
regex::bytes::NoExpand(&self.replace_with),
)
.into_owned()
}
else {
self.regex
.replace_all(&content, &*self.replace_with)
.to_string()
.into()
.into_owned()
}
}
fn replace_file(&self, path: impl AsRef<str>) -> Result<()> {
use atomicwrites::{AtomicFile, OverwriteBehavior::AllowOverwrite};
let path = path.as_ref();
let mut file = File::open(path)?;
let permissions = file.metadata()?.permissions();
let mut buffer = String::new();
file.read_to_string(&mut buffer)?;
use memmap::{Mmap, MmapMut};
use std::ops::DerefMut;
AtomicFile::new(path, AllowOverwrite)
.write(|f| -> Result<usize> {
f.write(self.replace(&buffer).as_bytes())
.map_err(|e| Error::new(e))
})
.map_err(Error::new)?;
set_permissions(path, permissions)?;
let path = std::path::Path::new(path.as_ref());
let source = File::open(path)?;
let mmap_source = unsafe { Mmap::map(&source)? };
let meta = source.metadata()?;
let target = tempfile::NamedTempFile::new_in(path.parent().unwrap())?;
let file = target.as_file();
file.set_len(meta.len())?;
file.set_permissions(meta.permissions())?;
let mut mmap_target = unsafe { MmapMut::map_mut(&file).unwrap() };
mmap_target
.deref_mut()
.write_all(&self.replace(&mmap_source[..]))?;
mmap_target.flush()?;
target.persist(path)?;
Ok(())
}
pub(crate) fn run(&self, source: &Source, in_place: bool) -> Result<()> {
match (source, in_place) {
(Source::Stdin, _) => {
let mut buffer = String::new();
let mut buffer = Vec::new();
let stdin = std::io::stdin();
let mut handle = stdin.lock();
handle.read_to_string(&mut buffer)?;
handle.read_to_end(&mut buffer)?;
let stdout = std::io::stdout();
let mut handle = stdout.lock();
handle.write(&self.replace(&buffer).as_bytes())?;
if self.has_matches(&buffer) {
let stdout = std::io::stdout();
let mut handle = stdout.lock();
handle.write_all(&self.replace(buffer))?;
}
Ok(())
},
(Source::Files(paths), true) => {
@ -131,7 +135,7 @@ impl Replacer {
paths
.par_iter()
.map(|p| self.replace_file(p))
.map(|p| self.replace_file(p).map_err(Error::log))
.collect::<Vec<Result<()>>>();
Ok(())
},
@ -141,12 +145,10 @@ impl Replacer {
paths
.iter()
.map(|p| {
handle.write(
&self
.replace(&Source::file_to_string(p)?)
.as_bytes(),
)?;
.map(|path| {
let file =
unsafe { memmap::Mmap::map(&File::open(&path)?)? };
handle.write_all(&self.replace(&file[..]))?;
Ok(())
})
.collect::<Result<Vec<()>>>()?;
@ -163,60 +165,66 @@ mod tests {
#[test]
fn default_global() -> Result<()> {
let r = Replacer::new("a".into(), "b".into(), false, None)?;
assert_eq!(r.replace("aaa"), "bbb");
assert_eq!(std::str::from_utf8(&r.replace("aaa")), Ok("bbb"));
Ok(())
}
#[test]
fn escaped_char_preservation() -> Result<()> {
let r = Replacer::new("a".into(), "b".into(), false, None)?;
assert_eq!(r.replace("a\\n"), "b\\n");
assert_eq!(std::str::from_utf8(&r.replace("a\\n")), Ok("b\\n"));
Ok(())
}
#[test]
fn smart_case_insensitive() -> Result<()> {
let r = Replacer::new("abc".into(), "x".into(), false, None)?;
assert_eq!(r.replace("abcABCAbcabC"), "xxxx");
assert_eq!(std::str::from_utf8(&r.replace("abcABCAbcabC")), Ok("xxxx"));
Ok(())
}
#[test]
fn smart_case_sensitive() -> Result<()> {
let r = Replacer::new("Abc".into(), "x".into(), false, None)?;
assert_eq!(r.replace("abcABCAbcabC"), "abcABCxabC");
assert_eq!(
std::str::from_utf8(&r.replace("abcABCAbcabC")),
Ok("abcABCxabC")
);
Ok(())
}
#[test]
fn no_smart_case_literals() -> Result<()> {
let r = Replacer::new("abc".into(), "x".into(), true, None)?;
assert_eq!(r.replace("abcABCAbcabC"), "xABCAbcabC");
assert_eq!(
std::str::from_utf8(&r.replace("abcABCAbcabC")),
Ok("xABCAbcabC")
);
Ok(())
}
#[test]
fn sanity_check_literal_replacements() -> Result<()> {
let r = Replacer::new("((special[]))".into(), "x".into(), true, None)?;
assert_eq!(r.replace("((special[]))y"), "xy");
assert_eq!(std::str::from_utf8(&r.replace("((special[]))y")), Ok("xy"));
Ok(())
}
#[test]
fn unescape_regex_replacements() -> Result<()> {
let r = Replacer::new("test".into(), r"\n".into(), false, None)?;
assert_eq!(r.replace("testtest"), "\n\n");
assert_eq!(std::str::from_utf8(&r.replace("testtest")), Ok("\n\n"));
// escaping the newline char
let r = Replacer::new("test".into(), r"\\n".into(), false, None)?;
assert_eq!(r.replace("testtest"), r"\n\n");
assert_eq!(std::str::from_utf8(&r.replace("testtest")), Ok(r"\n\n"));
Ok(())
}
#[test]
fn no_unescape_literal_replacements() -> Result<()> {
let r = Replacer::new("test".into(), r"\n".into(), true, None)?;
assert_eq!(r.replace("testtest"), r"\n\n");
assert_eq!(std::str::from_utf8(&r.replace("testtest")), Ok(r"\n\n"));
Ok(())
}