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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use std;
use std::fs::{create_dir, DirBuilder, File, OpenOptions};
use std::io::ErrorKind;
use std::io::Write;
use std::path::{Path, PathBuf};
use deno_core::ErrBox;
use rand;
use rand::Rng;
use url::Url;
#[cfg(unix)]
use nix::unistd::{chown as unix_chown, Gid, Uid};
#[cfg(any(unix))]
use std::os::unix::fs::DirBuilderExt;
#[cfg(any(unix))]
use std::os::unix::fs::PermissionsExt;
pub fn write_file<T: AsRef<[u8]>>(
filename: &Path,
data: T,
perm: u32,
) -> std::io::Result<()> {
write_file_2(filename, data, true, perm, true, false)
}
pub fn write_file_2<T: AsRef<[u8]>>(
filename: &Path,
data: T,
update_perm: bool,
perm: u32,
is_create: bool,
is_append: bool,
) -> std::io::Result<()> {
let mut file = OpenOptions::new()
.read(false)
.write(true)
.append(is_append)
.truncate(!is_append)
.create(is_create)
.open(filename)?;
if update_perm {
set_permissions(&mut file, perm)?;
}
file.write_all(data.as_ref())
}
#[cfg(any(unix))]
fn set_permissions(file: &mut File, perm: u32) -> std::io::Result<()> {
debug!("set file perm to {}", perm);
file.set_permissions(PermissionsExt::from_mode(perm & 0o777))
}
#[cfg(not(any(unix)))]
fn set_permissions(_file: &mut File, _perm: u32) -> std::io::Result<()> {
// NOOP on windows
Ok(())
}
pub fn make_temp_dir(
dir: Option<&Path>,
prefix: Option<&str>,
suffix: Option<&str>,
) -> std::io::Result<PathBuf> {
let prefix_ = prefix.unwrap_or("");
let suffix_ = suffix.unwrap_or("");
let mut buf: PathBuf = match dir {
Some(ref p) => p.to_path_buf(),
None => std::env::temp_dir(),
}
.join("_");
let mut rng = rand::thread_rng();
loop {
let unique = rng.gen::<u32>();
buf.set_file_name(format!("{}{:08x}{}", prefix_, unique, suffix_));
// TODO: on posix, set mode flags to 0o700.
let r = create_dir(buf.as_path());
match r {
Err(ref e) if e.kind() == ErrorKind::AlreadyExists => continue,
Ok(_) => return Ok(buf),
Err(e) => return Err(e),
}
}
}
pub fn mkdir(path: &Path, perm: u32, recursive: bool) -> std::io::Result<()> {
debug!("mkdir -p {}", path.display());
let mut builder = DirBuilder::new();
builder.recursive(recursive);
set_dir_permission(&mut builder, perm);
builder.create(path)
}
#[cfg(any(unix))]
fn set_dir_permission(builder: &mut DirBuilder, perm: u32) {
debug!("set dir perm to {}", perm);
builder.mode(perm & 0o777);
}
#[cfg(not(any(unix)))]
fn set_dir_permission(_builder: &mut DirBuilder, _perm: u32) {
// NOOP on windows
}
pub fn normalize_path(path: &Path) -> String {
let s = String::from(path.to_str().unwrap());
if cfg!(windows) {
// TODO This isn't correct. Probbly should iterate over components.
s.replace("\\", "/")
} else {
s
}
}
#[cfg(unix)]
pub fn chown(path: &str, uid: u32, gid: u32) -> Result<(), ErrBox> {
let nix_uid = Uid::from_raw(uid);
let nix_gid = Gid::from_raw(gid);
unix_chown(path, Option::Some(nix_uid), Option::Some(nix_gid))
.map_err(ErrBox::from)
}
#[cfg(not(unix))]
pub fn chown(_path: &str, _uid: u32, _gid: u32) -> Result<(), ErrBox> {
// Noop
// TODO: implement chown for Windows
Err(crate::deno_error::other_error(
"Op not implemented".to_string(),
))
}
pub fn resolve_from_cwd(path: &Path) -> Result<PathBuf, ErrBox> {
let resolved_path = if path.is_absolute() {
path.to_owned()
} else {
let cwd = std::env::current_dir().unwrap();
cwd.join(path)
};
// HACK: `Url::parse` is used here because it normalizes the path.
// Joining `/dev/deno/" with "./tests" using `PathBuf` yields `/deno/dev/./tests/`.
// On the other hand joining `/dev/deno/" with "./tests" using `Url` yields "/dev/deno/tests"
// - and that's what we want.
// There exists similar method on `PathBuf` - `PathBuf.canonicalize`, but the problem
// is `canonicalize` resolves symlinks and we don't want that.
// We just want to normalize the path...
// This only works on absolute paths - not worth extracting as a public utility.
let resolved_url =
Url::from_file_path(resolved_path).expect("Path should be absolute");
let normalized_url = Url::parse(resolved_url.as_str())
.expect("String from a URL should parse to a URL");
let normalized_path = normalized_url
.to_file_path()
.expect("URL from a path should contain a valid path");
Ok(normalized_path)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn resolve_from_cwd_child() {
let cwd = std::env::current_dir().unwrap();
assert_eq!(resolve_from_cwd(Path::new("a")).unwrap(), cwd.join("a"));
}
#[test]
fn resolve_from_cwd_dot() {
let cwd = std::env::current_dir().unwrap();
assert_eq!(resolve_from_cwd(Path::new(".")).unwrap(), cwd);
}
#[test]
fn resolve_from_cwd_parent() {
let cwd = std::env::current_dir().unwrap();
assert_eq!(resolve_from_cwd(Path::new("a/..")).unwrap(), cwd);
}
// TODO: Get a good expected value here for Windows.
#[cfg(not(windows))]
#[test]
fn resolve_from_cwd_absolute() {
let expected = Path::new("/a");
assert_eq!(resolve_from_cwd(expected).unwrap(), expected);
}
}
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