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use std::borrow::Borrow;
use std::fs::metadata;
use std::io::BufRead;
use std::os::unix::fs::MetadataExt;
use std::path::Path;
use anyhow::{Context, Result};
use copypasta::{ClipboardContext, ClipboardProvider};
use rand::Rng;
use sysinfo::{Disk, DiskExt};
use tuikit::term::Term;
use crate::constant_strings_paths::{CALC_PDF_PATH, THUMBNAIL_PATH};
use crate::content_window::ContentWindow;
use crate::fileinfo::human_size;
use crate::nvim::nvim;
use crate::users::Users;
/// Returns a `Display` instance after `tuikit::term::Term` creation.
pub fn init_term() -> Result<Term> {
let term: Term<()> = Term::new()?;
term.enable_mouse_support()?;
Ok(term)
}
/// Returns the disk owning a path.
/// None if the path can't be found.
///
/// We sort the disks by descending mount point size, then
/// we return the first disk whose mount point match the path.
pub fn disk_used_by_path<'a>(disks: &'a [Disk], path: &Path) -> Option<&'a Disk> {
let mut disks: Vec<&Disk> = disks.iter().collect();
disks.sort_by_key(|disk| disk.mount_point().as_os_str().len());
disks.reverse();
disks
.into_iter()
.find(|&disk| path.starts_with(disk.mount_point()))
}
fn disk_space_used(disk: Option<&Disk>) -> String {
match disk {
None => "".to_owned(),
Some(disk) => human_size(disk.available_space()),
}
}
/// Returns the disk space of the disk holding this path.
/// We can't be sure what's the disk of a given path, so we have to look
/// if the mount point is a parent of given path.
/// This solution is ugly but... for a lack of a better one...
pub fn disk_space(disks: &[Disk], path: &Path) -> String {
if path.as_os_str().is_empty() {
return "".to_owned();
}
disk_space_used(disk_used_by_path(disks, path))
}
/// Print the path on the stdout.
pub fn print_on_quit(path_string: &str) {
println!("{path_string}")
}
/// Returns the buffered lines from a text file.
pub fn read_lines<P>(
filename: P,
) -> std::io::Result<std::io::Lines<std::io::BufReader<std::fs::File>>>
where
P: AsRef<std::path::Path>,
{
let file = std::fs::File::open(filename)?;
Ok(std::io::BufReader::new(file).lines())
}
/// Extract a filename from a path reference.
/// May fail if the filename isn't utf-8 compliant.
pub fn filename_from_path(path: &std::path::Path) -> Result<&str> {
path.file_name()
.unwrap_or_default()
.to_str()
.context("couldn't parse the filename")
}
/// Uid of the current user.
/// Read from `/proc/self`.
/// Should never fail.
pub fn current_uid() -> Result<u32> {
Ok(metadata("/proc/self").map(|metadata| metadata.uid())?)
}
/// Get the current username as a String.
/// Read from `/proc/self` and then `/etc/passwd` and should never fail.
pub fn current_username() -> Result<String> {
Users::new()
.get_user_by_uid(current_uid()?)
.context("Couldn't read my own name")
}
/// True iff the command is available in $PATH.
pub fn is_program_in_path<S>(program: S) -> bool
where
S: Into<String> + std::fmt::Display,
{
if let Ok(path) = std::env::var("PATH") {
for p in path.split(':') {
let p_str = &format!("{p}/{program}");
if std::path::Path::new(p_str).exists() {
return true;
}
}
}
false
}
/// Extract the lines of a string
pub fn extract_lines(content: String) -> Vec<String> {
content.lines().map(|line| line.to_string()).collect()
}
pub fn set_clipboard(content: String) -> Result<()> {
log::info!("copied to clipboard: {}", content);
let Ok(mut ctx) = ClipboardContext::new() else {
return Ok(());
};
let Ok(_) = ctx.set_contents(content) else {
return Ok(());
};
// For some reason, it's not writen if you don't read it back...
let _ = ctx.get_contents();
Ok(())
}
/// Convert a row into a `crate::fm::ContentWindow` index.
/// Just remove the header rows.
pub fn row_to_window_index(row: u16) -> usize {
row as usize - ContentWindow::HEADER_ROWS
}
/// Convert a string into a valid, expanded and canonicalized path.
/// Doesn't check if the path exists.
pub fn string_to_path(path_string: &str) -> Result<std::path::PathBuf> {
let expanded_cow_path = shellexpand::tilde(&path_string);
let expanded_target: &str = expanded_cow_path.borrow();
Ok(std::fs::canonicalize(expanded_target)?)
}
pub fn args_is_empty(args: &[String]) -> bool {
args.is_empty() || args[0] == *""
}
/// True if the executable is "sudo"
pub fn is_sudo_command(executable: &str) -> bool {
matches!(executable, "sudo")
}
/// Open the path in neovim.
pub fn open_in_current_neovim(path: &Path, nvim_server: &str) {
let command = &format!(
"<esc>:e {path_str}<cr><esc>:set number<cr><esc>:close<cr>",
path_str = path.display()
);
let _ = nvim(nvim_server, command);
}
/// Creates a random string.
/// The string starts with `fm-` and contains 7 random alphanumeric characters.
pub fn random_name() -> String {
let mut rand_str = String::with_capacity(10);
rand_str.push_str("fm-");
rand::thread_rng()
.sample_iter(&rand::distributions::Alphanumeric)
.take(7)
.for_each(|ch| rand_str.push(ch as char));
rand_str.push_str(".txt");
rand_str
}
/// Clear the temporary file used by fm for previewing.
pub fn clear_tmp_file() {
let _ = std::fs::remove_file(THUMBNAIL_PATH);
let _ = std::fs::remove_file(CALC_PDF_PATH);
}
/// True if the directory is empty,
/// False if it's not.
/// Err if the path doesn't exists or isn't accessible by
/// the user.
pub fn is_dir_empty(path: &std::path::Path) -> Result<bool> {
Ok(path.read_dir()?.next().is_none())
}
pub fn path_to_string<P>(path: &P) -> String
where
P: AsRef<std::path::Path>,
{
path.as_ref().to_string_lossy().into_owned()
}
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