[rubygems/rubygems] Ignore `Errno::EROFS` errors when creating `bundler.lock`

Apparently old versions of MacOS would set `GEM_HOME` to a `/System`
folder, and trying to create a file there raises `Errno::EROFS`.

We ignore the error. Any permission issues should be better handled
further down the line.

https://github.com/rubygems/rubygems/commit/ef90c071d0

1 files changed, 11 insertions, 0 deletions

diff --git a/spec/bundler/install/process_lock_spec.rb b/spec/bundler/install/process_lock_spec.rb
index e2b8d20607..1f8c62f26e 100644
--- a/spec/bundler/install/process_lock_spec.rb
+++ b/spec/bundler/install/process_lock_spec.rb
@@ -42,5 +42,16 @@ RSpec.describe "process lock spec" do
         expect(processed).to eq true
       end
     end
+
+    context "when creating a lock raises Errno::EROFS" do
+      before { allow(File).to receive(:open).and_raise(Errno::EROFS) }
+
+      it "skips creating the lock file and yields" do
+        processed = false
+        Bundler::ProcessLock.lock(default_bundle_path) { processed = true }
+
+        expect(processed).to eq true
+      end
+    end
   end
 end