Move versions to lazily initialized cache on downloader

src/main.rs

@@ -19,6 +19,7 @@ mod args;
 mod config;
 mod nenv;
 mod version_detection;
+mod versioning;
 
 #[tokio::main(flavor = "current_thread")]
 async fn main() -> Result<()> {

src/nenv.rs

@@ -41,7 +41,7 @@ impl Nenv {
     pub async fn install(&mut self, version: NodeVersion) -> Result<()> {
         Self::clear_version_cache().await?;
 
-        if self.repo.is_installed(&version)?
+        if self.repo.is_installed(&version).await?
             && !prompt(
                 false,
                 format!(
@@ -55,7 +55,7 @@ impl Nenv {
         } else {
             self.repo.install_version(&version).await?;
             self.active_version = version.to_owned();
-            self.get_mapper()?.remap_additive().await?;
+            self.get_mapper().await?.remap_additive().await?;
 
             println!("Installed {}", version.to_string().bold());
             Ok(())
@@ -67,20 +67,20 @@ impl Nenv {
     pub async fn set_system_default(&mut self, version: NodeVersion) -> Result<()> {
         self.active_version = version.to_owned();
 
-        if !self.repo.is_installed(&version)? {
+        if !self.repo.is_installed(&version).await? {
             if prompt(
                 false,
                 format!("The version {version} is not installed. Do you want to install it?"),
             ) {
                 self.repo.install_version(&version).await?;
                 self.config.get_mut().await.node.default_version = version.to_owned();
-                self.get_mapper()?.remap_additive().await?;
+                self.get_mapper().await?.remap_additive().await?;
                 println!("Now using {}", version.to_string().bold());
             }
 
             Ok(())
         } else {
-            self.get_mapper()?.remap_additive().await?;
+            self.get_mapper().await?.remap_additive().await?;
             self.config.get_mut().await.node.default_version = version.to_owned();
             println!("Now using {}", version.to_string().bold());
 
@@ -90,27 +90,27 @@ impl Nenv {
 
     /// Executes a given node executable for the currently active version
     #[tracing::instrument(skip(self))]
-    pub async fn exec(&self, command: String, args: Vec<OsString>) -> Result<i32> {
-        if !self.repo.is_installed(&self.active_version)? {
+    pub async fn exec(&mut self, command: String, args: Vec<OsString>) -> Result<i32> {
+        if !self.repo.is_installed(&self.active_version).await? {
             self.repo.install_version(&self.active_version).await?;
         }
-        let exit_status = self.get_mapper()?.exec(command, args).await?;
+        let exit_status = self.get_mapper().await?.exec(command, args).await?;
 
         Ok(exit_status.code().unwrap_or(0))
     }
 
     /// Clears the version cache and remaps all executables
     #[tracing::instrument(skip(self))]
-    pub async fn refresh(&self) -> Result<()> {
+    pub async fn refresh(&mut self) -> Result<()> {
         Self::clear_version_cache().await?;
-        self.get_mapper()?.remap().await
+        self.get_mapper().await?.remap().await
     }
 
     /// Lists the currently installed versions
     #[tracing::instrument(skip(self))]
-    pub async fn list_versions(&self) -> Result<()> {
+    pub async fn list_versions(&mut self) -> Result<()> {
         let versions = self.repo.installed_versions().await?;
-        let active_version = self.repo.lookup_version(&self.active_version)?;
+        let active_version = self.repo.lookup_version(&self.active_version).await?;
         let active_version = active_version.version.into();
 
         println!("{}", "Installed versions:".bold());
@@ -119,6 +119,7 @@ impl Nenv {
             let info = self
                 .repo
                 .all_versions()
+                .await?
                 .get(&version)
                 .ok_or_else(|| VersionError::unknown_version(version.to_string()))?;
             let lts = info
@@ -138,7 +139,7 @@ impl Nenv {
     }
 
     /// Initializes nenv and prompts for a default version.
-    pub async fn init_nenv(&self) -> Result<()> {
+    pub async fn init_nenv(&mut self) -> Result<()> {
         let items = vec!["latest", "lts", "custom"];
         let selection = Select::with_theme(&ColorfulTheme::default())
             .with_prompt("Select a default node version")
@@ -196,10 +197,11 @@ impl Nenv {
     }
 
     #[tracing::instrument(level = "debug", skip(self))]
-    fn get_mapper(&self) -> Result<Mapper> {
+    async fn get_mapper(&mut self) -> Result<Mapper> {
         let node_path = self
             .repo
-            .get_version_path(&self.active_version)?
+            .get_version_path(&self.active_version)
+            .await?
             .ok_or_else(|| VersionError::not_installed(self.active_version.to_owned()))?;
         Ok(Mapper::new(node_path))
     }

src/repository/downloader/mod.rs

@@ -10,9 +10,11 @@ use crate::{
     consts::{CACHE_DIR, NODE_ARCHIVE_SUFFIX, NODE_VERSIONS_DIR},
     error::ReqwestError,
     utils::progress_bar,
+    versioning::SimpleVersion,
 };
 
-use super::versions::SimpleVersion;
+use self::versions::Versions;
+
 use futures::StreamExt;
 use miette::{miette, Context, IntoDiagnostic, Result};
 use tokio::{
@@ -21,29 +23,49 @@ use tokio::{
 };
 mod extract;
 mod version_info;
+pub mod versions;
 pub use version_info::VersionInfo;
 
 #[derive(Clone)]
 pub struct NodeDownloader {
     config: ConfigAccess,
+    versions: Option<Versions>,
 }
 
 impl NodeDownloader {
     pub fn new(config: ConfigAccess) -> Self {
-        Self { config }
+        Self {
+            config,
+            versions: None,
+        }
     }
 
     /// Returns the list of available node versions
     #[tracing::instrument(level = "debug", skip(self))]
-    pub async fn get_versions(&self) -> Result<Vec<VersionInfo>> {
-        let versions = reqwest::get(format!("{}/index.json", self.base_url().await))
-            .await
-            .map_err(ReqwestError::from)
-            .context("Fetching versions")?
-            .json()
-            .await
-            .map_err(ReqwestError::from)
-            .context("Parsing versions response")?;
+    pub async fn versions(&mut self) -> Result<&Versions> {
+        if self.versions.is_none() {
+            self.versions = Some(self.load_versions().await?);
+        }
+
+        Ok(self.versions.as_ref().unwrap())
+    }
+
+    async fn load_versions(&self) -> Result<Versions> {
+        let versions = if let Some(v) = Versions::load().await {
+            v
+        } else {
+            let versions = reqwest::get(format!("{}/index.json", self.base_url().await))
+                .await
+                .map_err(ReqwestError::from)
+                .context("Fetching versions")?
+                .json()
+                .await
+                .map_err(ReqwestError::from)
+                .context("Parsing versions response")?;
+            let v = Versions::new(versions);
+            v.save().await?;
+            v
+        };
 
         Ok(versions)
     }

src/repository/downloader/versions.rs

@@ -1,74 +1,29 @@
-use std::{collections::HashMap, fmt::Display};
+use std::collections::HashMap;
 
 use semver::{Version, VersionReq};
 use serde::{Deserialize, Serialize};
 use std::fmt::Debug;
 use tokio::fs;
 
-use crate::{consts::VERSION_FILE_PATH, error::SerializeBincodeError};
+use crate::{
+    consts::VERSION_FILE_PATH,
+    error::SerializeBincodeError,
+    versioning::{SimpleVersion, VersionMetadata},
+};
 use miette::{Context, IntoDiagnostic, Result};
 
-use super::downloader::VersionInfo;
+use super::VersionInfo;
 
 #[derive(Clone, Serialize, Deserialize)]
 pub struct Versions {
     lts_versions: HashMap<String, u16>,
-    versions: HashMap<SimpleVersion, SimpleVersionInfo>,
+    versions: HashMap<SimpleVersion, VersionMetadata>,
     // as this field is not serialized
     // it needs to be calculated after serialization
     #[serde(skip)]
     sorted_versions: Vec<SimpleVersion>,
 }
 
-#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Deserialize, Serialize, Hash)]
-pub struct SimpleVersion {
-    pub major: u16,
-    pub minor: u16,
-    pub patch: u32,
-}
-
-impl From<semver::Version> for SimpleVersion {
-    fn from(value: semver::Version) -> Self {
-        Self {
-            major: value.major as u16,
-            minor: value.minor as u16,
-            patch: value.patch as u32,
-        }
-    }
-}
-
-impl From<SimpleVersion> for semver::Version {
-    fn from(value: SimpleVersion) -> Self {
-        Self::new(value.major as u64, value.minor as u64, value.patch as u64)
-    }
-}
-
-impl Display for SimpleVersion {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        let Self {
-            major,
-            minor,
-            patch,
-        } = self;
-        write!(f, "{major}.{minor}.{patch}")
-    }
-}
-
-#[derive(Clone, Serialize, Deserialize)]
-pub struct SimpleVersionInfo {
-    pub version: SimpleVersion,
-    pub lts: Option<String>,
-}
-
-impl From<VersionInfo> for SimpleVersionInfo {
-    fn from(value: VersionInfo) -> Self {
-        Self {
-            version: value.version.into(),
-            lts: value.lts.lts(),
-        }
-    }
-}
-
 impl Versions {
     /// Loads the versions from the cached versions.json file
     pub(crate) async fn load() -> Option<Self> {
@@ -131,7 +86,7 @@ impl Versions {
 
     /// Returns the latest known node version
     #[tracing::instrument(level = "debug", skip_all)]
-    pub fn latest(&self) -> &SimpleVersionInfo {
+    pub fn latest(&self) -> &VersionMetadata {
         self.versions
             .get(self.sorted_versions.last().expect("No known node versions"))
             .unwrap()
@@ -139,7 +94,7 @@ impl Versions {
 
     /// Returns the latest node lts version
     #[tracing::instrument(level = "debug", skip_all)]
-    pub fn latest_lts(&self) -> &SimpleVersionInfo {
+    pub fn latest_lts(&self) -> &VersionMetadata {
         let mut versions = self
             .lts_versions
             .values()
@@ -151,14 +106,14 @@ impl Versions {
 
     /// Returns a lts version by name
     #[tracing::instrument(level = "debug", skip(self))]
-    pub fn get_lts<S: AsRef<str> + Debug>(&self, lts_name: S) -> Option<&SimpleVersionInfo> {
+    pub fn get_lts<S: AsRef<str> + Debug>(&self, lts_name: S) -> Option<&VersionMetadata> {
         let lts_version = self.lts_versions.get(lts_name.as_ref())?;
         self.get_latest_for_major(*lts_version)
     }
 
     /// Returns any version that fulfills the given requirement
     #[tracing::instrument(level = "debug", skip(self))]
-    pub fn get_fulfilling(&self, req: &VersionReq) -> Option<&SimpleVersionInfo> {
+    pub fn get_fulfilling(&self, req: &VersionReq) -> Option<&VersionMetadata> {
         let fulfilling_versions = self
             .sorted_versions
             .iter()
@@ -172,13 +127,13 @@ impl Versions {
 
     /// Returns the info for the given version
     #[tracing::instrument(level = "debug", skip(self))]
-    pub fn get(&self, version: &Version) -> Option<&SimpleVersionInfo> {
+    pub fn get(&self, version: &Version) -> Option<&VersionMetadata> {
         self.versions.get(&version.clone().into())
     }
 
     /// Returns any version that fulfills the given requirement
     #[tracing::instrument(level = "debug", skip(self))]
-    fn get_latest_for_major(&self, major: u16) -> Option<&SimpleVersionInfo> {
+    fn get_latest_for_major(&self, major: u16) -> Option<&VersionMetadata> {
         let fulfilling_versions = self
             .sorted_versions
             .iter()

src/repository/mod.rs

@@ -10,19 +10,19 @@ 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::NodeDownloader,
+    downloader::{versions::Versions, NodeDownloader},
     node_path::NodePath,
-    versions::{SimpleVersion, SimpleVersionInfo, Versions},
 };
 
 pub mod downloader;
+mod local_versions;
 pub(crate) mod node_path;
-pub mod versions;
 
 #[derive(Clone, Debug)]
 pub enum NodeVersion {
@@ -90,7 +90,6 @@ impl fmt::Display for NodeVersion {
 }
 
 pub struct Repository {
-    versions: Versions,
     downloader: NodeDownloader,
 }
 
@@ -100,12 +99,8 @@ impl Repository {
     pub async fn init(config: ConfigAccess) -> Result<Self> {
         Self::create_folders().await?;
         let downloader = NodeDownloader::new(config.clone());
-        let versions = load_versions(&downloader).await?;
 
-        Ok(Self {
-            downloader,
-            versions,
-        })
+        Ok(Self { downloader })
     }
 
     #[tracing::instrument(level = "debug")]
@@ -137,8 +132,8 @@ impl Repository {
 
     /// Returns the path for the given node version
     #[tracing::instrument(level = "debug", skip(self))]
-    pub fn get_version_path(&self, version: &NodeVersion) -> Result<Option<NodePath>> {
-        let info = self.lookup_version(version)?;
+    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() {
@@ -165,16 +160,16 @@ impl Repository {
 
     /// Returns if the given version is installed
     #[tracing::instrument(level = "debug", skip(self))]
-    pub fn is_installed(&self, version: &NodeVersion) -> Result<bool> {
-        let info = self.lookup_version(version)?;
+    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(&self, version: &NodeVersion) -> Result<()> {
-        let info = self.lookup_version(version)?;
+    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(())
@@ -182,19 +177,16 @@ impl Repository {
 
     /// Performs a lookup for the given node version
     #[tracing::instrument(level = "debug", skip(self))]
-    pub fn lookup_version(
-        &self,
-        version_req: &NodeVersion,
-    ) -> Result<&SimpleVersionInfo, VersionError> {
+    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 => self.versions.latest(),
-            NodeVersion::LatestLts => self.versions.latest_lts(),
-            NodeVersion::Lts(lts) => self
-                .versions
+            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) => self
-                .versions
+            NodeVersion::Req(req) => versions
                 .get_fulfilling(req)
                 .ok_or_else(|| VersionError::unfulfillable_version(req.to_owned()))?,
         };
@@ -204,25 +196,11 @@ impl Repository {
 
     /// Returns the reference to all known versions
     #[tracing::instrument(level = "debug", skip(self))]
-    pub fn all_versions(&self) -> &Versions {
-        &self.versions
+    pub async fn all_versions(&mut self) -> Result<&Versions> {
+        self.downloader.versions().await
     }
 }
 
-#[inline]
-#[tracing::instrument(level = "debug", skip_all)]
-async fn load_versions(downloader: &NodeDownloader) -> Result<Versions> {
-    let versions = if let Some(v) = Versions::load().await {
-        v
-    } else {
-        let all_versions = downloader.get_versions().await?;
-        let v = Versions::new(all_versions);
-        v.save().await?;
-        v
-    };
-    Ok(versions)
-}
-
 fn build_version_path(version: &SimpleVersion) -> PathBuf {
     NODE_VERSIONS_DIR
         .join(version.to_string())

src/versioning.rs

@@ -0,0 +1,56 @@
+use std::fmt::Display;
+
+use serde::{Deserialize, Serialize};
+
+use crate::repository::downloader::VersionInfo;
+
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Deserialize, Serialize, Hash)]
+pub struct SimpleVersion {
+    pub major: u16,
+    pub minor: u16,
+    pub patch: u32,
+}
+
+#[derive(Clone, Serialize, Deserialize)]
+pub struct VersionMetadata {
+    /// The semver version
+    pub version: SimpleVersion,
+    /// The lts name of this version if it is an lts version
+    pub lts: Option<String>,
+}
+
+impl From<semver::Version> for SimpleVersion {
+    fn from(value: semver::Version) -> Self {
+        Self {
+            major: value.major as u16,
+            minor: value.minor as u16,
+            patch: value.patch as u32,
+        }
+    }
+}
+
+impl From<SimpleVersion> for semver::Version {
+    fn from(value: SimpleVersion) -> Self {
+        Self::new(value.major as u64, value.minor as u64, value.patch as u64)
+    }
+}
+
+impl Display for SimpleVersion {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let Self {
+            major,
+            minor,
+            patch,
+        } = self;
+        write!(f, "{major}.{minor}.{patch}")
+    }
+}
+
+impl From<VersionInfo> for VersionMetadata {
+    fn from(value: VersionInfo) -> Self {
+        Self {
+            version: value.version.into(),
+            lts: value.lts.lts(),
+        }
+    }
+}