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|
use std::ascii::AsciiExt;
use std::env::current_dir;
use std::fs;
use std::io;
use std::os::unix;
use std::os::unix::raw::mode_t;
use std::os::unix::fs::{MetadataExt, PermissionsExt};
use std::path::{Component, Path, PathBuf};
use ansi_term::{ANSIString, ANSIStrings, Colour, Style};
use ansi_term::Style::Plain;
use ansi_term::Colour::{Red, Green, Yellow, Blue, Purple, Cyan, Fixed};
use users::Users;
use locale;
use unicode_width::UnicodeWidthStr;
use number_prefix::{binary_prefix, decimal_prefix, Prefixed, Standalone, PrefixNames};
use datetime::local::{LocalDateTime, DatePiece};
use datetime::format::{DateFormat};
use colours::Colours;
use column::{Column, Cell};
use column::Column::*;
use dir::Dir;
use filetype::file_colour;
use options::{SizeFormat, TimeType};
use output::details::UserLocale;
use feature::Attribute;
/// This grey value is directly in between white and black, so it's guaranteed
/// to show up on either backgrounded terminal.
pub static GREY: Colour = Fixed(244);
/// A **File** is a wrapper around one of Rust's Path objects, along with
/// associated data about the file.
///
/// Each file is definitely going to have its filename displayed at least
/// once, have its file extension extracted at least once, and have its stat
/// information queried at least once, so it makes sense to do all this at the
/// start and hold on to all the information.
pub struct File<'a> {
pub name: String,
pub dir: Option<&'a Dir>,
pub ext: Option<String>,
pub path: PathBuf,
pub stat: fs::Metadata,
pub xattrs: Vec<Attribute>,
pub this: Option<Dir>,
}
impl<'a> File<'a> {
/// Create a new File object from the given Path, inside the given Dir, if
/// appropriate. Paths specified directly on the command-line have no Dirs.
///
/// This uses `symlink_metadata` instead of `metadata`, which doesn't
/// follow symbolic links.
pub fn from_path(path: &Path, parent: Option<&'a Dir>, recurse: bool) -> io::Result<File<'a>> {
fs::symlink_metadata(path).map(|stat| File::with_stat(stat, path, parent, recurse))
}
/// Create a new File object from the given Stat result, and other data.
pub fn with_stat(stat: fs::Metadata, path: &Path, parent: Option<&'a Dir>, recurse: bool) -> File<'a> {
let filename = path_filename(path);
// If we are recursing, then the `this` field contains a Dir object
// that represents the current File as a directory, if it is a
// directory. This is used for the --tree option.
let this = if recurse && stat.is_dir() {
Dir::readdir(path).ok()
}
else {
None
};
File {
path: path.to_path_buf(),
dir: parent,
stat: stat,
ext: ext(&filename),
xattrs: Attribute::llist(path).unwrap_or(Vec::new()),
name: filename.to_string(),
this: this,
}
}
pub fn is_directory(&self) -> bool {
self.stat.is_dir()
}
pub fn is_file(&self) -> bool {
self.stat.is_file()
}
pub fn is_executable_file(&self) -> bool {
let bit = unix::fs::USER_EXECUTE;
self.is_file() && (self.stat.permissions().mode() & bit) == bit
}
pub fn is_link(&self) -> bool {
self.stat.file_type().is_symlink()
}
pub fn is_pipe(&self) -> bool {
false // TODO: Still waiting on this one...
}
/// Whether this file is a dotfile or not.
pub fn is_dotfile(&self) -> bool {
self.name.starts_with(".")
}
/// Get the data for a column, formatted as a coloured string.
pub fn display<U: Users>(&self, column: &Column, users_cache: &mut U, locale: &UserLocale) -> Cell {
match *column {
Permissions => self.permissions_string(),
FileSize(f) => self.file_size(f, &locale.numeric),
Timestamp(t, y) => self.timestamp(t, y, &locale.time),
HardLinks => self.hard_links(&locale.numeric),
Inode => self.inode(),
Blocks => self.blocks(&locale.numeric),
User => self.user(users_cache),
Group => self.group(users_cache),
GitStatus => self.git_status(),
}
}
/// The "file name view" is what's displayed in the column and lines
/// views, but *not* in the grid view.
///
/// It consists of the file name coloured in the appropriate style,
/// with special formatting for a symlink.
pub fn file_name_view(&self, colours: &Colours) -> String {
if self.is_link() {
self.symlink_file_name_view(colours)
}
else {
file_colour(colours, self).paint(&*self.name).to_string()
}
}
/// If this file is a symlink, returns a string displaying its name,
/// and an arrow pointing to the file it links to, which is also
/// coloured in the appropriate style.
///
/// If the symlink target doesn't exist, then instead of displaying
/// an error, highlight the target and arrow in red. The error would
/// be shown out of context, and it's almost always because the
/// target doesn't exist.
fn symlink_file_name_view(&self, colours: &Colours) -> String {
let name = &*self.name;
let style = file_colour(colours, self);
if let Ok(path) = fs::read_link(&self.path) {
let target_path = match self.dir {
Some(dir) => dir.join(&*path),
None => path,
};
match self.target_file(&target_path) {
Ok(file) => {
// Generate a preview for the path this symlink links to.
// The preview should consist of the directory of the file
// (if present) in cyan, an extra slash if necessary, then
// the target file, colourised in the appropriate style.
let mut path_prefix = String::new();
let path_bytes: Vec<Component> = file.path.components().collect();
if !path_bytes.is_empty() {
// Use init() to add all but the last component of the
// path to the prefix. init() panics when given an
// empty list, hence the check.
for
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