4 files changed, 39 insertions, 1 deletions
diff --git a/cli/npm/resolvers/common.rs b/cli/npm/resolvers/common.rs
index e114f3f8a..07996c4e1 100644
--- a/cli/npm/resolvers/common.rs
+++ b/cli/npm/resolvers/common.rs
@@ -15,6 +15,7 @@ use crate::lockfile::Lockfile;
 use crate::npm::cache::should_sync_download;
 use crate::npm::resolution::NpmResolutionSnapshot;
 use crate::npm::NpmCache;
+use crate::npm::NpmPackageId;
 use crate::npm::NpmPackageReq;
 use crate::npm::NpmResolutionPackage;
 
@@ -36,6 +37,8 @@ pub trait InnerNpmPackageResolver: Send + Sync {
     specifier: &ModuleSpecifier,
   ) -> Result<PathBuf, AnyError>;
 
+  fn package_size(&self, package_id: &NpmPackageId) -> Result<u64, AnyError>;
+
   fn has_packages(&self) -> bool;
 
   fn add_package_reqs(
diff --git a/cli/npm/resolvers/global.rs b/cli/npm/resolvers/global.rs
index 996f55c2d..42090415a 100644
--- a/cli/npm/resolvers/global.rs
+++ b/cli/npm/resolvers/global.rs
@@ -15,6 +15,7 @@ use deno_core::url::Url;
 use deno_runtime::deno_node::PackageJson;
 use deno_runtime::deno_node::TYPES_CONDITIONS;
 
+use crate::fs_util;
 use crate::lockfile::Lockfile;
 use crate::npm::resolution::NpmResolution;
 use crate::npm::resolution::NpmResolutionSnapshot;
@@ -110,6 +111,11 @@ impl InnerNpmPackageResolver for GlobalNpmPackageResolver {
     Ok(self.package_folder(&pkg_id))
   }
 
+  fn package_size(&self, package_id: &NpmPackageId) -> Result<u64, AnyError> {
+    let package_folder = self.package_folder(package_id);
+    Ok(fs_util::dir_size(&package_folder)?)
+  }
+
   fn has_packages(&self) -> bool {
     self.resolution.has_packages()
   }
diff --git a/cli/npm/resolvers/local.rs b/cli/npm/resolvers/local.rs
index 6c4c4ef6c..cad940d56 100644
--- a/cli/npm/resolvers/local.rs
+++ b/cli/npm/resolvers/local.rs
@@ -177,6 +177,22 @@ impl InnerNpmPackageResolver for LocalNpmPackageResolver {
     Ok(package_root_path)
   }
 
+  fn package_size(&self, package_id: &NpmPackageId) -> Result<u64, AnyError> {
+    match self.resolution.resolve_package_from_id(package_id) {
+      Some(package) => Ok(fs_util::dir_size(
+        // package is stored at:
+        // node_modules/.deno/<package_id>/node_modules/<package_name>
+        &self
+          .root_node_modules_path
+          .join(".deno")
+          .join(package.id.to_string())
+          .join("node_modules")
+          .join(package.id.name),
+      )?),
+      None => bail!("Could not find package folder for '{}'", package_id),
+    }
+  }
+
   fn has_packages(&self) -> bool {
     self.resolution.has_packages()
   }
diff --git a/cli/npm/resolvers/mod.rs b/cli/npm/resolvers/mod.rs
index 3d55170ac..71c2abc00 100644
--- a/cli/npm/resolvers/mod.rs
+++ b/cli/npm/resolvers/mod.rs
@@ -27,6 +27,7 @@ use crate::lockfile::Lockfile;
 use self::common::InnerNpmPackageResolver;
 use self::local::LocalNpmPackageResolver;
 use super::NpmCache;
+use super::NpmPackageId;
 use super::NpmPackageReq;
 use super::NpmRegistryApi;
 use super::NpmResolutionSnapshot;
@@ -212,6 +213,14 @@ impl NpmPackageResolver {
     Ok(path)
   }
 
+  /// Attempts to get the package size in bytes.
+  pub fn package_size(
+    &self,
+    package_id: &NpmPackageId,
+  ) -> Result<u64, AnyError> {
+    self.inner.package_size(package_id)
+  }
+
   /// Gets if the provided specifier is in an npm package.
   pub fn in_npm_package(&self, specifier: &ModuleSpecifier) -> bool {
     self
@@ -301,10 +310,14 @@ impl NpmPackageResolver {
       self.unstable,
       self.no_npm,
       self.local_node_modules_path.clone(),
-      Some(self.inner.snapshot()),
+      Some(self.snapshot()),
     )
   }
 
+  pub fn snapshot(&self) -> NpmResolutionSnapshot {
+    self.inner.snapshot()
+  }
+
   pub fn lock(&self, lockfile: &mut Lockfile) -> Result<(), AnyError> {
     self.inner.lock(lockfile)
   }