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Greg 2018-12-23 00:01:35 -05:00
commit db3fc2fcff
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2
.gitignore vendored Normal file
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/target
**/*.rs.bk

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Cargo.lock generated Normal file
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name = "aho-corasick"
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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]
[[package]]
name = "ansi_term"
version = "0.11.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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[[package]]
name = "atty"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "bitflags"
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name = "cfg-if"
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name = "redox_termios"
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source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"redox_syscall 0.1.44 (registry+https://github.com/rust-lang/crates.io-index)",
]
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name = "regex"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "regex-syntax"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "strsim"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "termion"
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name = "ucd-util"
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source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "unicode-width"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "utf8-ranges"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "vec_map"
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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 = "winapi"
version = "0.3.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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[[package]]
name = "winapi-i686-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
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Cargo.toml Normal file
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[package]
name = "re"
version = "0.1.0"
edition = "2018"
authors = ["Gregory <gregory.mkv@gmail.com>"]
description = "A find & replace CLI focused on user-friendliness"
keywords = ["sed", "find", "replace", "regex"]
license = "MIT"
homepage = "https://github.com/chmln/re"
repository = "https://github.com/chmln/re.git"
categories = ["command-line-utilities", "text-processing", "development-tools"]
[dependencies]
clap = "2.32.0"
regex = "1.1.0"
[profile.release]
opt-level = 3
lto = true
debug = false

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src/app.rs Normal file
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use {crate::{Error,Stream,Source}};
const VERSION: &'static str = env!("CARGO_PKG_VERSION");
pub(crate) struct App;
impl App {
pub(crate) fn run() -> Result<(), Error> {
use clap;
let app = clap::App::new("re")
.version(VERSION)
.setting(clap::AppSettings::ColoredHelp)
.setting(clap::AppSettings::NextLineHelp)
.arg(
clap::Arg::with_name("enable_regex")
.short("r")
.long("regex")
.required(false)
.takes_value(false)
.help("Enable regex"),
)
.arg(
clap::Arg::with_name("input")
.short("i")
.required(false)
.takes_value(true)
.help("The path to file")
)
.arg(
clap::Arg::with_name("find")
.help("The string or regexp (if --regex) to search for.")
.required(true)
.index(1),
)
.arg(
clap::Arg::with_name("replace_with")
.help("What to replace each match with. If regex is enabled, you may use captured values like $1, $2, etc.")
.required(true)
.index(2),
);
let matches = app.get_matches();
let file_path = matches.value_of("input").map(|p| p.to_string());
let find = matches.value_of("find").unwrap();
let replace_with = matches.value_of("replace_with").unwrap();
let is_regex = matches.occurrences_of("enable_regex") == 1;
let source = Source::from(file_path);
let mut stream: Stream = (&source).into_stream()?;
stream.replace(is_regex, find, replace_with)?;
// replace file in-place, or pipe to stdout
stream.output(&source)
}
}

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src/error.rs Normal file
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pub(crate) struct Error {
// low-level cause, used only for debugging
cause: String,
// user-facing error output
description: String,
}
impl<T> From<T> for Error
where
T: std::error::Error,
{
fn from(err: T) -> Error {
Error {
cause: err
.source()
.map_or_else(|| "N/A".to_string(), |e| e.to_string()),
description: format!("{}", err),
}
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "{}", self.description)
}
}
impl std::fmt::Debug for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "Error: {}\nDetails: {}", self.description, self.cause)
}
}

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src/input.rs Normal file
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use {crate::Error, std::{fs::File, io::prelude::*}};
pub(crate) enum Source {
Stdin,
File(String),
}
impl Source {
pub(crate) fn from(maybe_path: Option<String>) -> Self {
maybe_path
.map(Source::File)
.unwrap_or_else(|| Source::Stdin)
}
pub(crate) fn into_stream(&self) -> Result<Stream, Error> {
match self {
Source::Stdin => {
let mut buffer = String::new();
let stdin = std::io::stdin();
let mut handle = stdin.lock();
handle.read_to_string(&mut buffer)?;
Ok(Stream::new(buffer))
}
Source::File(path) => {
let file = File::open(path)?;
let mut buf_reader = std::io::BufReader::new(file);
let mut buffer = String::new();
buf_reader.read_to_string(&mut buffer)?;
Ok(Stream::new(buffer))
}
}
}
}
pub(crate) struct Stream {
data: String,
}
impl Stream {
pub(crate) fn new(data: String) -> Self {
Self { data }
}
pub(crate) fn replace(
&mut self,
is_regex: bool,
look_for: &str,
replace_with: &str,
) -> Result<(), crate::Error> {
if is_regex {
self.data = regex::Regex::new(look_for)?
.replace_all(&self.data, replace_with)
.to_string()
} else {
self.data = self.data.replace(look_for, replace_with)
}
Ok(())
}
// Output based on input.
// When dealing with a file, transform it in-place.
// Otherwise, pipe to stdout.
pub(crate) fn output(self, source: &Source) -> Result<(), crate::Error> {
match source {
Source::File(path) => {
Ok(std::fs::write(path, self.data)?)
},
Source::Stdin => {
let stdout = std::io::stdout();
let mut handle = stdout.lock();
handle.write(self.data.as_bytes())?;
Ok(())
}
}
}
}

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src/main.rs Normal file
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mod app;
mod error;
mod input;
pub(crate) use {
crate::error::Error,
crate::input::{Source, Stream},
};
fn main() -> Result<(), ()> {
app::App::run().map_err(|e| eprintln!("{}", e))
}

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src/utils.rs Normal file
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