Fix Corepack install failure by activating local package manager fall…

…back (#11484)

npm_and_yarn/lib/dependabot/npm_and_yarn/helpers.rb

@@ -467,6 +467,8 @@ def self.install(name, version, env: {})
       # Attempt to activate the local version of the package manager
       sig { params(name: String).void }
       def self.fallback_to_local_version(name)
+        return "Corepack does not support #{name}" unless corepack_supported_package_manager?(name)
+
         Dependabot.logger.info("Falling back to activate the currently installed version of #{name}.")
 
         # Fetch the currently installed version directly from the environment

npm_and_yarn/lib/dependabot/npm_and_yarn/package_manager.rb

@@ -417,10 +417,15 @@ def install(name, version)
 
         Dependabot.logger.info("Installing \"#{name}@#{version}\"")
 
-        SharedHelpers.run_shell_command(
-          "corepack install #{name}@#{version} --global --cache-only",
-          fingerprint: "corepack install <name>@<version> --global --cache-only"
-        )
+        begin
+          SharedHelpers.run_shell_command(
+            "corepack install #{name}@#{version} --global --cache-only",
+            fingerprint: "corepack install <name>@<version> --global --cache-only"
+          )
+        rescue SharedHelpers::HelperSubprocessFailed => e
+          Dependabot.logger.error("Error installing #{name}@#{version}: #{e.message}")
+          Helpers.fallback_to_local_version(name)
+        end
       end
 
       sig { params(name: T.nilable(String)).returns(String) }