fix(npm): support old packages and registries with no integrity, but with a sha1sum (#17289)

Closes #17281

1 files changed, 26 insertions, 2 deletions

diff --git a/cli/npm/registry.rs b/cli/npm/registry.rs
index ed0911697..0b35079de 100644
--- a/cli/npm/registry.rs
+++ b/cli/npm/registry.rs
@@ -1,5 +1,6 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
+use std::borrow::Cow;
 use std::cmp::Ordering;
 use std::collections::HashMap;
 use std::collections::HashSet;
@@ -178,8 +179,31 @@ impl NpmPackageVersionInfo {
 pub struct NpmPackageVersionDistInfo {
   /// URL to the tarball.
   pub tarball: String,
-  pub shasum: String,
-  pub integrity: Option<String>,
+  shasum: String,
+  integrity: Option<String>,
+}
+
+impl NpmPackageVersionDistInfo {
+  #[cfg(test)]
+  pub fn new(
+    tarball: String,
+    shasum: String,
+    integrity: Option<String>,
+  ) -> Self {
+    Self {
+      tarball,
+      shasum,
+      integrity,
+    }
+  }
+
+  pub fn integrity(&self) -> Cow<String> {
+    self
+      .integrity
+      .as_ref()
+      .map(Cow::Borrowed)
+      .unwrap_or_else(|| Cow::Owned(format!("sha1-{}", self.shasum)))
+  }
 }
 
 pub trait NpmRegistryApi: Clone + Sync + Send + 'static {