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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use std::collections::HashMap;
use std::fs;
use anyhow::Context;
use anyhow::Result;
use base64::prelude::BASE64_STANDARD;
use base64::Engine;
use flate2::write::GzEncoder;
use flate2::Compression;
use once_cell::sync::Lazy;
use parking_lot::Mutex;
use tar::Builder;
use crate::testdata_path;
pub static CUSTOM_NPM_PACKAGE_CACHE: Lazy<CustomNpmPackageCache> =
Lazy::new(CustomNpmPackageCache::default);
struct CustomNpmPackage {
pub registry_file: String,
pub tarballs: HashMap<String, Vec<u8>>,
}
/// Creates tarballs and a registry json file for npm packages
/// in the `testdata/npm/registry/@denotest` directory.
#[derive(Default)]
pub struct CustomNpmPackageCache(Mutex<HashMap<String, CustomNpmPackage>>);
impl CustomNpmPackageCache {
pub fn tarball_bytes(
&self,
name: &str,
version: &str,
) -> Result<Option<Vec<u8>>> {
Ok(
self
.get_package_property(name, |p| p.tarballs.get(version).cloned())?
.flatten(),
)
}
pub fn registry_file(&self, name: &str) -> Result<Option<Vec<u8>>> {
self.get_package_property(name, |p| p.registry_file.as_bytes().to_vec())
}
fn get_package_property<TResult>(
&self,
package_name: &str,
func: impl FnOnce(&CustomNpmPackage) -> TResult,
) -> Result<Option<TResult>> {
// it's ok if multiple threads race here as they will do the same work twice
if !self.0.lock().contains_key(package_name) {
match get_npm_package(package_name)? {
Some(package) => {
self.0.lock().insert(package_name.to_string(), package);
}
None => return Ok(None),
}
}
Ok(self.0.lock().get(package_name).map(func))
}
}
fn get_npm_package(package_name: &str) -> Result<Option<CustomNpmPackage>> {
use ring::digest::Context;
use ring::digest::SHA512;
let package_folder = testdata_path().join("npm/registry").join(package_name);
if !package_folder.exists() {
return Ok(None);
}
// read all the package's versions
let mut tarballs = HashMap::new();
let mut versions = serde_json::Map::new();
let mut latest_version = semver::Version::parse("0.0.0").unwrap();
for entry in fs::read_dir(&package_folder)? {
let entry = entry?;
let file_type = entry.file_type()?;
if !file_type.is_dir() {
continue;
}
let version = entry.file_name().to_string_lossy().to_string();
let version_folder = package_folder.join(&version);
// create the tarball
let mut tarball_bytes = Vec::new();
{
let mut encoder =
GzEncoder::new(&mut tarball_bytes, Compression::default());
{
let mut builder = Builder::new(&mut encoder);
builder
.append_dir_all("package", &version_folder)
.with_context(|| {
format!("Error adding tarball for directory: {}", version_folder)
})?;
builder.finish()?;
}
encoder.finish()?;
}
// get tarball hash
let mut hash_ctx = Context::new(&SHA512);
hash_ctx.update(&tarball_bytes);
let digest = hash_ctx.finish();
let tarball_checksum = BASE64_STANDARD.encode(digest.as_ref());
// create the registry file JSON for this version
let mut dist = serde_json::Map::new();
dist.insert(
"integrity".to_string(),
format!("sha512-{tarball_checksum}").into(),
);
dist.insert("shasum".to_string(), "dummy-value".into());
dist.insert(
"tarball".to_string(),
format!(
"http://localhost:4545/npm/registry/{package_name}/{version}.tgz"
)
.into(),
);
tarballs.insert(version.clone(), tarball_bytes);
let package_json_path = version_folder.join("package.json");
let package_json_text = fs::read_to_string(&package_json_path)
.with_context(|| {
format!("Error reading package.json at {}", package_json_path)
})?;
let mut version_info: serde_json::Map<String, serde_json::Value> =
serde_json::from_str(&package_json_text)?;
version_info.insert("dist".to_string(), dist.into());
if let Some(maybe_optional_deps) = version_info.get("optionalDependencies")
{
if let Some(optional_deps) = maybe_optional_deps.as_object() {
if let Some(maybe_deps) = version_info.get("dependencies") {
if let Some(deps) = maybe_deps.as_object() {
let mut cloned_deps = deps.to_owned();
for (key, value) in optional_deps {
cloned_deps.insert(key.to_string(), value.to_owned());
}
version_info.insert(
"dependencies".to_string(),
serde_json::to_value(cloned_deps).unwrap(),
);
}
} else {
version_info.insert(
"dependencies".to_string(),
serde_json::to_value(optional_deps).unwrap(),
);
}
}
}
versions.insert(version.clone(), version_info.into());
let version = semver::Version::parse(&version)?;
if version.cmp(&latest_version).is_gt() {
latest_version = version;
}
}
let mut dist_tags = serde_json::Map::new();
dist_tags.insert("latest".to_string(), latest_version.to_string().into());
// create the registry file for this package
let mut registry_file = serde_json::Map::new();
registry_file.insert("name".to_string(), package_name.to_string().into());
registry_file.insert("versions".to_string(), versions.into());
registry_file.insert("dist-tags".to_string(), dist_tags.into());
Ok(Some(CustomNpmPackage {
registry_file: serde_json::to_string(®istry_file).unwrap(),
tarballs,
}))
}
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