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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use std::env::current_dir;
use std::fs::OpenOptions;
use std::io::Write;
use std::path::{Component, Path, PathBuf};
use deno_core::ErrBox;
use walkdir::WalkDir;
pub fn write_file<T: AsRef<[u8]>>(
filename: &Path,
data: T,
mode: u32,
) -> std::io::Result<()> {
write_file_2(filename, data, true, mode, true, false)
}
pub fn write_file_2<T: AsRef<[u8]>>(
filename: &Path,
data: T,
update_mode: bool,
mode: 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_mode {
#[cfg(unix)]
{
use std::os::unix::fs::PermissionsExt;
let mode = mode & 0o777;
debug!("set file mode to {:o}", mode);
let permissions = PermissionsExt::from_mode(mode);
file.set_permissions(permissions)?;
}
#[cfg(not(unix))]
let _ = mode;
}
file.write_all(data.as_ref())
}
/// Normalize all itermediate components of the path (ie. remove "./" and "../" components).
/// Similar to `fs::canonicalize()` but doesn't resolve symlinks.
///
/// Taken from Cargo
/// https://github.com/rust-lang/cargo/blob/af307a38c20a753ec60f0ad18be5abed3db3c9ac/src/cargo/util/paths.rs#L60-L85
pub fn normalize_path(path: &Path) -> PathBuf {
let mut components = path.components().peekable();
let mut ret =
if let Some(c @ Component::Prefix(..)) = components.peek().cloned() {
components.next();
PathBuf::from(c.as_os_str())
} else {
PathBuf::new()
};
for component in components {
match component {
Component::Prefix(..) => unreachable!(),
Component::RootDir => {
ret.push(component.as_os_str());
}
Component::CurDir => {}
Component::ParentDir => {
ret.pop();
}
Component::Normal(c) => {
ret.push(c);
}
}
}
ret
}
pub fn resolve_from_cwd(path: &Path) -> Result<PathBuf, ErrBox> {
let resolved_path = if path.is_absolute() {
path.to_owned()
} else {
let cwd = current_dir().unwrap();
cwd.join(path)
};
Ok(normalize_path(&resolved_path))
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn resolve_from_cwd_child() {
let cwd = current_dir().unwrap();
assert_eq!(resolve_from_cwd(Path::new("a")).unwrap(), cwd.join("a"));
}
#[test]
fn resolve_from_cwd_dot() {
let cwd = current_dir().unwrap();
assert_eq!(resolve_from_cwd(Path::new(".")).unwrap(), cwd);
}
#[test]
fn resolve_from_cwd_parent() {
let cwd = current_dir().unwrap();
assert_eq!(resolve_from_cwd(Path::new("a/..")).unwrap(), cwd);
}
#[test]
fn test_normalize_path() {
assert_eq!(normalize_path(Path::new("a/../b")), PathBuf::from("b"));
assert_eq!(normalize_path(Path::new("a/./b/")), PathBuf::from("a/b/"));
assert_eq!(
normalize_path(Path::new("a/./b/../c")),
PathBuf::from("a/c")
);
if cfg!(windows) {
assert_eq!(
normalize_path(Path::new("C:\\a\\.\\b\\..\\c")),
PathBuf::from("C:\\a\\c")
);
}
}
// 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);
}
}
pub fn files_in_subtree<F>(root: PathBuf, filter: F) -> Vec<PathBuf>
where
F: Fn(&Path) -> bool,
{
assert!(root.is_dir());
WalkDir::new(root)
.into_iter()
.filter_map(|e| e.ok())
.map(|e| e.path().to_owned())
.filter(|p| if p.is_dir() { false } else { filter(&p) })
.collect()
}
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