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use std::io::{self, BufRead};
use std::os::unix::ffi::OsStrExt;
use std::path::Path;
use std::str::FromStr;
use super::{MountInfo, MountIter};
#[derive(Debug, Default, Clone, Hash, Eq, PartialEq)]
pub struct MountList(pub Vec<MountInfo>);
impl MountList {
pub fn parse_from<'a, I: Iterator<Item = &'a str>>(lines: I) -> io::Result<MountList> {
lines.map(MountInfo::from_str).collect::<io::Result<Vec<MountInfo>>>().map(MountList)
}
pub fn new() -> io::Result<MountList> {
Ok(MountList(MountIter::new()?.collect::<io::Result<Vec<MountInfo>>>()?))
}
pub fn new_from_file<P: AsRef<Path>>(path: P) -> io::Result<MountList> {
Ok(MountList(MountIter::new_from_file(path)?.collect::<io::Result<Vec<MountInfo>>>()?))
}
pub fn new_from_reader<R: BufRead>(reader: R) -> io::Result<MountList> {
Ok(MountList(MountIter::new_from_reader(reader).collect::<io::Result<Vec<MountInfo>>>()?))
}
pub fn source_mounted_at<D: AsRef<Path>, P: AsRef<Path>>(&self, source: D, path: P) -> bool {
self.get_mount_by_source(source)
.map_or(false, |mount| mount.dest.as_path() == path.as_ref())
}
pub fn get_mount_by_dest<P: AsRef<Path>>(&self, path: P) -> Option<&MountInfo> {
self.0.iter().find(|mount| mount.dest == path.as_ref())
}
pub fn get_mount_by_source<P: AsRef<Path>>(&self, path: P) -> Option<&MountInfo> {
self.0.iter().find(|mount| mount.source == path.as_ref())
}
pub fn source_starts_with<'a>(
&'a self,
path: &'a Path,
) -> Box<Iterator<Item = &MountInfo> + 'a> {
self.starts_with(path.as_os_str().as_bytes(), |m| &m.source)
}
pub fn destination_starts_with<'a>(
&'a self,
path: &'a Path,
) -> Box<Iterator<Item = &MountInfo> + 'a> {
self.starts_with(path.as_os_str().as_bytes(), |m| &m.dest)
}
fn starts_with<'a, F: Fn(&'a MountInfo) -> &'a Path + 'a>(
&'a self,
path: &'a [u8],
func: F,
) -> Box<Iterator<Item = &MountInfo> + 'a> {
let iterator = self.0.iter().filter(move |mount| {
let input = func(mount).as_os_str().as_bytes();
input.len() >= path.len() && &input[..path.len()] == path
});
Box::new(iterator)
}
}