bundle upgrade after bundler update unnecessarily adds version-specific current platform to lock file

[owst]

Describe the problem as clearly as you can

We upgraded bundler and then upgraded a gem, we unexpectedly saw a version-specific platform added to the lock file.

Example, given Gemfile:

source 'https://rubygems.org'

gem 'nokogiri', "~> 1"
gem 'sorbet'

and Gemfile.lock:

GEM
  remote: https://rubygems.org/
  specs:
    mini_portile2 (2.6.1)
    nokogiri (1.12.0)
      mini_portile2 (~> 2.6.1)
      racc (~> 1.4)
    nokogiri (1.12.0-x86_64-darwin)
      racc (~> 1.4)
    nokogiri (1.12.0-x86_64-linux)
      racc (~> 1.4)
    racc (1.6.2)
    sorbet (0.5.10601)
      sorbet-static (= 0.5.10601)
    sorbet-static (0.5.10601-universal-darwin-14)
    sorbet-static (0.5.10601-universal-darwin-15)
    sorbet-static (0.5.10601-universal-darwin-16)
    sorbet-static (0.5.10601-universal-darwin-17)
    sorbet-static (0.5.10601-universal-darwin-18)
    sorbet-static (0.5.10601-universal-darwin-19)
    sorbet-static (0.5.10601-universal-darwin-20)
    sorbet-static (0.5.10601-universal-darwin-21)
    sorbet-static (0.5.10601-universal-darwin-22)
    sorbet-static (0.5.10601-x86_64-linux)

PLATFORMS
  ruby
  x86_64-darwin
  x86_64-linux

DEPENDENCIES
  nokogiri (~> 1)
  sorbet

BUNDLED WITH
   2.3.12

We can update bundler with bundle update --bundler, which applies this diff to Gemfile.lock:

diff --git a/Gemfile.lock b/Gemfile.lock
index 9ed5406..6f7cfeb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,4 +33,4 @@ DEPENDENCIES
   sorbet
 
 BUNDLED WITH
-   2.3.12
+   2.4.2

If we then bundle update --conservative nokogiri we see this diff:

diff --git a/Gemfile.lock b/Gemfile.lock
index 6f7cfeb..7fb035c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,13 +1,9 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    mini_portile2 (2.6.1)
-    nokogiri (1.12.0)
-      mini_portile2 (~> 2.6.1)
+    nokogiri (1.13.10-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.12.0-x86_64-darwin)
-      racc (~> 1.4)
-    nokogiri (1.12.0-x86_64-linux)
+    nokogiri (1.13.10-x86_64-linux)
       racc (~> 1.4)
     racc (1.6.2)
     sorbet (0.5.10601)
@@ -24,8 +20,8 @@ GEM
     sorbet-static (0.5.10601-x86_64-linux)
 
 PLATFORMS
-  ruby
   x86_64-darwin
+  x86_64-darwin-21
   x86_64-linux
 
 DEPENDENCIES

I understand that the ruby platform was removed due to sorbet being in our lockfile and #5807 but I'm not sure why x86_64-darwin-21 was added given that x86_64-darwin is already present.

What were you expecting to happen?

Nokogiri to be updated and (due to #5807) the ruby platform be removed from the lock file.

What actually happened?

Nokogiri was updated, the ruby platform was removed from the lock file but unexpectedly the x86_64-darwin-21 platform was added.

If not included with the output of your command, run bundle env and paste the output below

Environment

Bundler       2.4.2
  Platforms   ruby, x86_64-darwin-21
Ruby          2.7.6p219 (2022-04-12 revision c9c2245c0a25176072e02db9254f0e0c84c805cd) [x86_64-darwin-21]
  Full Path   /Users/owenstephens/.rbenv/versions/2.7.6/bin/ruby
  Config Dir  /Users/owenstephens/.rbenv/versions/2.7.6/etc
RubyGems      3.3.26
  Gem Home    /Users/owenstephens/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0
  Gem Path    /Users/owenstephens/.gem/ruby/2.7.0:/Users/owenstephens/.rbenv/versions/2.7.6/lib/ruby/gems/2.7.0
  User Home   /Users/owenstephens
  User Path   /Users/owenstephens/.gem/ruby/2.7.0
  Bin Dir     /Users/owenstephens/.rbenv/versions/2.7.6/bin
Tools
  Git         2.38.1
  RVM         not installed
  rbenv       rbenv 1.2.0
  chruby      not installed

Bundler Build Metadata

Built At          2023-01-01
Git SHA           2cd3ed45bf
Released Version  true

[owst]

Great, thanks for the fast fix @deivid-rodriguez!

[deivid-rodriguez]

No problem, thanks for report this!