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