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denoland-deno/cli/deno_dir.rs
2020-05-24 19:20:40 +02:00

47 lines
1.4 KiB
Rust

// 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)
}
}