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directory_completions.rs
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directory_completions.rs
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use crate::completions::{matches, Completer, CompletionOptions};
use nu_protocol::{
engine::{EngineState, StateWorkingSet},
levenshtein_distance, Span,
};
use reedline::Suggestion;
use std::fs;
use std::path::Path;
use std::sync::Arc;
use super::{partial_from, prepend_base_dir};
const SEP: char = std::path::MAIN_SEPARATOR;
#[derive(Clone)]
pub struct DirectoryCompletion {
engine_state: Arc<EngineState>,
}
impl DirectoryCompletion {
pub fn new(engine_state: Arc<EngineState>) -> Self {
Self { engine_state }
}
}
impl Completer for DirectoryCompletion {
fn fetch(
&mut self,
_: &StateWorkingSet,
prefix: Vec<u8>,
span: Span,
offset: usize,
_: usize,
options: &CompletionOptions,
) -> Vec<Suggestion> {
let cwd = if let Some(d) = self.engine_state.get_env_var("PWD") {
match d.as_string() {
Ok(s) => s,
Err(_) => "".to_string(),
}
} else {
"".to_string()
};
let partial = String::from_utf8_lossy(&prefix).to_string();
// Filter only the folders
let output: Vec<_> = directory_completion(span, &partial, &cwd, options)
.into_iter()
.map(move |x| Suggestion {
value: x.1,
description: None,
extra: None,
span: reedline::Span {
start: x.0.start - offset,
end: x.0.end - offset,
},
append_whitespace: false,
})
.collect();
output
}
// Sort results prioritizing the non hidden folders
fn sort(&self, items: Vec<Suggestion>, prefix: Vec<u8>) -> Vec<Suggestion> {
let prefix_str = String::from_utf8_lossy(&prefix).to_string();
// Sort items
let mut sorted_items = items;
sorted_items.sort_by(|a, b| a.value.cmp(&b.value));
sorted_items.sort_by(|a, b| {
let a_distance = levenshtein_distance(&prefix_str, &a.value);
let b_distance = levenshtein_distance(&prefix_str, &b.value);
a_distance.cmp(&b_distance)
});
// Separate the results between hidden and non hidden
let mut hidden: Vec<Suggestion> = vec![];
let mut non_hidden: Vec<Suggestion> = vec![];
for item in sorted_items.into_iter() {
let item_path = Path::new(&item.value);
if let Some(value) = item_path.file_name() {
if let Some(value) = value.to_str() {
if value.starts_with('.') {
hidden.push(item);
} else {
non_hidden.push(item);
}
}
}
}
// Append the hidden folders to the non hidden vec to avoid creating a new vec
non_hidden.append(&mut hidden);
non_hidden
}
}
pub fn directory_completion(
span: nu_protocol::Span,
partial: &str,
cwd: &str,
options: &CompletionOptions,
) -> Vec<(nu_protocol::Span, String)> {
let original_input = partial;
let (base_dir_name, partial) = partial_from(partial);
let base_dir = nu_path::expand_path_with(&base_dir_name, cwd);
// This check is here as base_dir.read_dir() with base_dir == "" will open the current dir
// which we don't want in this case (if we did, base_dir would already be ".")
if base_dir == Path::new("") {
return Vec::new();
}
if let Ok(result) = base_dir.read_dir() {
return result
.filter_map(|entry| {
entry.ok().and_then(|entry| {
if let Ok(metadata) = fs::metadata(entry.path()) {
if metadata.is_dir() {
let mut file_name = entry.file_name().to_string_lossy().into_owned();
if matches(&partial, &file_name, options) {
let mut path = if prepend_base_dir(original_input, &base_dir_name) {
format!("{}{}", base_dir_name, file_name)
} else {
file_name.to_string()
};
if entry.path().is_dir() {
path.push(SEP);
file_name.push(SEP);
}
// Fix files or folders with quotes or hash
if path.contains('\'') || path.contains('"') || path.contains(' ') || path.contains('#') {
path = format!("`{}`", path);
}
Some((span, path))
} else {
None
}
} else {
None
}
} else {
None
}
})
})
.collect();
}
Vec::new()
}