correct download

Cargo.lock

@@ -742,9 +742,9 @@ dependencies = [
 
 [[package]]
 name = "os_str_bytes"
-version = "6.0.0"
+version = "6.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e22443d1643a904602595ba1cd8f7d896afe56d26712531c5ff73a15b2fbf64"
+checksum = "029d8d0b2f198229de29dca79676f2738ff952edf3fde542eb8bf94d8c21b435"
 
 [[package]]
 name = "owo-colors"
@@ -947,9 +947,9 @@ checksum = "7ef03e0a2b150c7a90d01faf6254c9c48a41e95fb2a8c2ac1c6f0d2b9aefc342"
 
 [[package]]
 name = "rustls"
-version = "0.20.4"
+version = "0.20.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fbfeb8d0ddb84706bc597a5574ab8912817c52a397f819e5b614e2265206921"
+checksum = "a024a432ae760ab3bff924ad91ce1cfa52cb57ed16e1ef32d0d249cfee1a6c13"
 dependencies = [
  "log",
  "ring",
@@ -1265,9 +1265,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-util"
-version = "0.7.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0edfdeb067411dba2044da6d1cb2df793dd35add7888d73c16e3381ded401764"
+checksum = "f988a1a1adc2fb21f9c12aa96441da33a1728193ae0b95d2be22dbd17fcb4e5c"
 dependencies = [
  "bytes",
  "futures-core",

src/download.rs

@@ -8,10 +8,11 @@ use indexmap::IndexMap;
 use node_semver::Version;
 use reqwest::Client;
 use serde::Deserialize;
-use tar::Archive;
+use tokio::task::spawn_blocking;
 use tracing::{debug, info};
 
 use crate::{
+    create_dir_if_not_exists,
     manifest::{Bugs, Human, Person, Repository},
     PackageJson, WrapErr,
 };
@@ -103,6 +104,10 @@ impl NpmClient {
 
     #[tracing::instrument(skip(self))]
     pub async fn download_package(&self, name: &str, url: &str) -> Result<()> {
+        let module = Path::new("node_modules").join(name);
+
+        create_dir_if_not_exists(&module).await?;
+
         let response = self
             .reqwest
             .get(url)
@@ -111,11 +116,29 @@ impl NpmClient {
             .wrap_err("getting response")?;
         let tarball = response.bytes().await.wrap_err("fetching body")?;
 
-        let tar = flate2::read::GzDecoder::new(tarball.reader());
-        let mut archive = tar::Archive::new(tar);
-        archive
-            .unpack(Path::new("node_modules").join(name))
-            .wrap_err("unpack tarball")?;
+        spawn_blocking(move || -> Result<()> {
+            let tar = flate2::read::GzDecoder::new(tarball.reader());
+            let mut archive = tar::Archive::new(tar);
+
+            for entry in archive.entries()? {
+                let mut entry = entry?;
+                let path = entry.path()?;
+                let path = path
+                    .strip_prefix("package")
+                    .wrap_err("file name must start with package/")?;
+
+                let path = module.join(path);
+
+                info!(?path, "Unpacking file");
+
+                entry
+                    .unpack(&path)
+                    .wrap_err(format!("unpacking file {}", path.display()))?;
+            }
+
+            Ok(())
+        })
+        .await??;
 
         info!("successfully downloaded package");
 

src/helper.rs

@@ -0,0 +1,19 @@
+use std::{io, path::Path};
+
+use color_eyre::{eyre::bail, Result};
+use tokio::fs;
+
+use crate::WrapErr;
+
+pub async fn create_dir_if_not_exists(path: impl AsRef<Path>) -> Result<()> {
+    match fs::metadata(&path).await {
+        Ok(_) => {}
+        Err(e) if e.kind() == io::ErrorKind::NotFound => {
+            fs::create_dir(&path)
+                .await
+                .wrap_err("creating node_modules directory")?;
+        }
+        Err(e) => bail!(e),
+    }
+    Ok(())
+}

src/main.rs

@@ -1,15 +1,15 @@
-use std::{fs, io};
-
-use color_eyre::{
-    eyre::{bail, WrapErr},
-    Result,
-};
+use color_eyre::{eyre::WrapErr, Result};
+use tokio::fs;
 use tracing::metadata::LevelFilter;
 use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt, EnvFilter, Registry};
 
-use crate::{download::NpmClient, manifest::PackageJson, resolve::ResolveContext};
+use crate::{
+    download::NpmClient, helper::create_dir_if_not_exists, manifest::PackageJson,
+    resolve::ResolveContext,
+};
 
 mod download;
+mod helper;
 mod manifest;
 mod resolve;
 
@@ -19,19 +19,15 @@ async fn main() -> Result<()> {
     setup_tracing()?;
 
     let manifest = "package.json";
-    let manifest = fs::read_to_string(manifest).wrap_err("Opening package.json file")?;
+    let manifest = fs::read_to_string(manifest)
+        .await
+        .wrap_err("Opening package.json file")?;
 
     let manifest: PackageJson = serde_json::from_str(&manifest)?;
 
     let resolve_context = ResolveContext::new();
 
-    match fs::metadata("node_modules") {
-        Ok(_) => {}
-        Err(e) if e.kind() == io::ErrorKind::NotFound => {
-            fs::create_dir("node_modules").wrap_err("creating node_modules directory")?;
-        }
-        Err(e) => bail!(e),
-    }
+    create_dir_if_not_exists("node_modules").await?;
 
     for (name, requested_version) in &manifest.dependencies.unwrap() {
         resolve_context