exa/exa.rs

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Rust
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#![feature(phase)]
extern crate regex;
#[phase(syntax)] extern crate regex_macros;
extern crate getopts;
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use std::os;
use std::io::fs;
use file::File;
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use column::defaultColumns;
use options::{Options, SortField, Name};
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pub mod colours;
pub mod column;
pub mod format;
pub mod file;
pub mod unix;
pub mod options;
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fn main() {
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let args: Vec<StrBuf> = os::args().iter()
.map(|x| x.to_strbuf())
.collect();
let opts = ~[
getopts::optflag("a", "all", "show dot-files"),
getopts::optopt("s", "sort", "field to sort by", "WORD"),
];
let matches = match getopts::getopts(args.tail(), opts) {
Ok(m) => m,
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Err(f) => fail!("Invalid options\n{}", f.to_err_msg()),
};
let opts = Options {
showInvisibles: matches.opt_present("all"),
sortField: matches.opt_str("sort").map(|word| SortField::from_word(word)).unwrap_or(Name),
};
let strs = if matches.free.is_empty() {
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vec!("./".to_strbuf())
}
else {
matches.free.clone()
};
for dir in strs.move_iter() {
list(opts, Path::new(dir))
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}
}
fn list(options: Options, path: Path) {
let paths = match fs::readdir(&path) {
Ok(paths) => paths,
Err(e) => fail!("readdir: {}", e),
};
let mut files = paths.iter().map(|path| File::from_path(path)).collect();
options.sort(&mut files);
let columns = defaultColumns();
let table: Vec<Vec<StrBuf>> = files.iter()
.filter(|&f| options.show(f))
.map(|f| columns.iter().map(|c| f.display(c)).collect())
.collect();
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let maxes: Vec<uint> = range(0, columns.len())
.map(|n| table.iter().map(|row| colours::strip_formatting(row.get(n)).len()).max().unwrap())
.collect();
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for row in table.iter() {
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let mut first = true;
for (length, cell) in maxes.iter().zip(row.iter()) {
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if first {
first = false;
} else {
print!(" ");
}
print!("{}", cell.as_slice());
for _ in range(cell.len(), *length) {
print!(" ");
}
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}
print!("\n");
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}
}