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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use crate::disk_cache::DiskCache;
use std::path::PathBuf;
/// `DenoDir` serves as coordinator for multiple `DiskCache`s containing them
/// in single directory that can be controlled with `$DENO_DIR` env variable.
#[derive(Clone)]
pub struct DenoDir {
/// Example: /Users/rld/.deno/
pub root: PathBuf,
/// Used by TsCompiler to cache compiler output.
pub gen_cache: DiskCache,
}
impl DenoDir {
pub fn new(maybe_custom_root: Option<PathBuf>) -> std::io::Result<Self> {
// Only setup once.
let home_dir = dirs::home_dir().expect("Could not get home directory.");
let fallback = home_dir.join(".deno");
// We use the OS cache dir because all files deno writes are cache files
// Once that changes we need to start using different roots if DENO_DIR
// is not set, and keep a single one if it is.
let default = dirs::cache_dir()
.map(|d| d.join("deno"))
.unwrap_or(fallback);
let root: PathBuf = if let Some(root) = maybe_custom_root {
if root.is_absolute() {
root
} else {
std::env::current_dir()?.join(root)
}
} else {
default
};
assert!(root.is_absolute());
let gen_path = root.join("gen");
let deno_dir = Self {
root,
gen_cache: DiskCache::new(&gen_path),
};
deno_dir.gen_cache.ensure_dir_exists(&gen_path)?;
Ok(deno_dir)
}
}
/// To avoid the poorly managed dirs crate
#[cfg(not(windows))]
mod dirs {
use std::path::PathBuf;
pub fn cache_dir() -> Option<PathBuf> {
if cfg!(target_os = "macos") {
home_dir().map(|h| h.join("Library/Caches"))
} else {
std::env::var_os("XDG_CACHE_HOME")
.map(PathBuf::from)
.or_else(|| home_dir().map(|h| h.join(".cache")))
}
}
pub fn home_dir() -> Option<PathBuf> {
std::env::var_os("HOME")
.and_then(|h| if h.is_empty() { None } else { Some(h) })
.map(PathBuf::from)
}
}
/// To avoid the poorly managed dirs crate
// Copied from
// https://github.com/dirs-dev/dirs-sys-rs/blob/ec7cee0b3e8685573d847f0a0f60aae3d9e07fa2/src/lib.rs#L140-L164
// MIT license. Copyright (c) 2018-2019 dirs-rs contributors
#[cfg(windows)]
mod dirs {
use std::ffi::OsString;
use std::os::windows::ffi::OsStringExt;
use std::path::PathBuf;
use winapi::shared::winerror;
use winapi::um::{combaseapi, knownfolders, shlobj, shtypes, winbase, winnt};
fn known_folder(folder_id: shtypes::REFKNOWNFOLDERID) -> Option<PathBuf> {
unsafe {
let mut path_ptr: winnt::PWSTR = std::ptr::null_mut();
let result = shlobj::SHGetKnownFolderPath(
folder_id,
0,
std::ptr::null_mut(),
&mut path_ptr,
);
if result == winerror::S_OK {
let len = winbase::lstrlenW(path_ptr) as usize;
let path = std::slice::from_raw_parts(path_ptr, len);
let ostr: OsString = OsStringExt::from_wide(path);
combaseapi::CoTaskMemFree(path_ptr as *mut winapi::ctypes::c_void);
Some(PathBuf::from(ostr))
} else {
None
}
}
}
pub fn cache_dir() -> Option<PathBuf> {
known_folder(&knownfolders::FOLDERID_LocalAppData)
}
pub fn home_dir() -> Option<PathBuf> {
known_folder(&knownfolders::FOLDERID_Profile)
}
}
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