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nenv/src/repository/mod.rs

209 lines
6.0 KiB
Rust

use core::fmt;
use std::{path::PathBuf, str::FromStr};
use futures::future;
use semver::{Version, VersionReq};
use serde::{Deserialize, Deserializer, Serialize, Serializer};
use tokio::fs;
use crate::{
config::ConfigAccess,
consts::{ARCH, BIN_DIR, CACHE_DIR, CFG_DIR, DATA_DIR, NODE_VERSIONS_DIR, OS},
error::VersionError,
versioning::{SimpleVersion, VersionMetadata},
};
use miette::{IntoDiagnostic, Result};
use self::{
downloader::{versions::Versions, NodeDownloader},
node_path::NodePath,
};
pub mod downloader;
mod local_versions;
pub(crate) mod node_path;
#[derive(Clone, Debug)]
pub enum NodeVersion {
Latest,
LatestLts,
Lts(String),
Req(VersionReq),
}
impl FromStr for NodeVersion {
type Err = &'static str;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let input = s.to_lowercase();
let version = match &*input {
"latest" => Self::Latest,
"lts" => Self::LatestLts,
_ => {
let version_string = s.trim().trim_start_matches('v');
if let Ok(req) = VersionReq::parse(version_string) {
Self::Req(req)
} else {
Self::Lts(version_string.to_lowercase())
}
}
};
Ok(version)
}
}
impl<'de> Deserialize<'de> for NodeVersion {
#[inline]
fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
where
D: Deserializer<'de>,
{
let string = String::deserialize(deserializer)?;
Self::from_str(&string).map_err(serde::de::Error::custom)
}
}
impl Serialize for NodeVersion {
#[inline]
fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
where
S: Serializer,
{
self.to_string().serialize(serializer)
}
}
impl fmt::Display for NodeVersion {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
NodeVersion::Latest => String::from("latest"),
NodeVersion::LatestLts => String::from("lts"),
NodeVersion::Lts(name) => name.to_owned(),
NodeVersion::Req(req) => req.to_string(),
}
.fmt(f)
}
}
pub struct Repository {
downloader: NodeDownloader,
}
impl Repository {
/// Initializes a new repository with the given confi
#[tracing::instrument(level = "debug", skip_all)]
pub async fn init(config: ConfigAccess) -> Result<Self> {
Self::create_folders().await?;
let downloader = NodeDownloader::new(config.clone());
Ok(Self { downloader })
}
#[tracing::instrument(level = "debug")]
async fn create_folders() -> Result<()> {
let dirs = vec![
&*CFG_DIR,
&*DATA_DIR,
&*CACHE_DIR,
&*BIN_DIR,
&*NODE_VERSIONS_DIR,
];
for result in future::join_all(dirs.into_iter().map(|dir| async move {
if !dir.exists() {
fs::create_dir_all(dir).await.into_diagnostic()?;
}
Ok(())
}))
.await
{
#[allow(clippy::question_mark)]
if let Err(e) = result {
return Err(e);
}
}
Ok(())
}
/// Returns the path for the given node version
#[tracing::instrument(level = "debug", skip(self))]
pub async fn get_version_path(&mut self, version: &NodeVersion) -> Result<Option<NodePath>> {
let info = self.lookup_version(version).await?;
let path = build_version_path(&info.version);
Ok(if path.exists() {
Some(NodePath::new(path))
} else {
None
})
}
/// Returns a list of installed versions
#[tracing::instrument(level = "debug", skip(self))]
pub async fn installed_versions(&self) -> Result<Vec<Version>> {
let mut versions = Vec::new();
let mut iter = fs::read_dir(&*NODE_VERSIONS_DIR).await.into_diagnostic()?;
while let Some(entry) = iter.next_entry().await.into_diagnostic()? {
if let Ok(version) = Version::parse(entry.file_name().to_string_lossy().as_ref()) {
versions.push(version);
};
}
Ok(versions)
}
/// Returns if the given version is installed
#[tracing::instrument(level = "debug", skip(self))]
pub async fn is_installed(&mut self, version: &NodeVersion) -> Result<bool> {
let info = self.lookup_version(version).await?;
Ok(build_version_path(&info.version).exists())
}
/// Installs the given node version
#[tracing::instrument(level = "debug", skip(self))]
pub async fn install_version(&mut self, version: &NodeVersion) -> Result<()> {
let info = self.lookup_version(version).await?.to_owned();
self.downloader.download(&info.version).await?;
Ok(())
}
/// Performs a lookup for the given node version
#[tracing::instrument(level = "debug", skip(self))]
pub async fn lookup_version(&mut self, version_req: &NodeVersion) -> Result<&VersionMetadata> {
let versions = self.downloader.versions().await?;
let version = match version_req {
NodeVersion::Latest => versions.latest(),
NodeVersion::LatestLts => versions.latest_lts(),
NodeVersion::Lts(lts) => versions
.get_lts(lts)
.ok_or_else(|| VersionError::unknown_version(lts.to_owned()))?,
NodeVersion::Req(req) => versions
.get_fulfilling(req)
.ok_or_else(|| VersionError::unfulfillable_version(req.to_owned()))?,
};
Ok(version)
}
/// Returns the reference to all known versions
#[tracing::instrument(level = "debug", skip(self))]
pub async fn all_versions(&mut self) -> Result<&Versions> {
self.downloader.versions().await
}
}
fn build_version_path(version: &SimpleVersion) -> PathBuf {
NODE_VERSIONS_DIR
.join(version.to_string())
.join(format!("node-v{}-{}-{}", version, OS, ARCH))
}