[rubygems/rubygems] Add CHECKSUMS for each gem in lockfile

We lock the checksum for each resolved spec under a new CHECKSUMS
section in the lockfile.

If the locked spec does not resolve for the local platform, we preserve
the locked checksum, similar to how we preserve specs.

Checksum locking only makes sense on install. The compact index
information is only available then.

https://github.com/rubygems/rubygems/commit/bde37ca6bf

2 files changed, 14 insertions, 6 deletions

diff --git a/spec/bundler/runtime/platform_spec.rb b/spec/bundler/runtime/platform_spec.rb
index b31bc4abe8..d0af8b1c1c 100644
--- a/spec/bundler/runtime/platform_spec.rb
+++ b/spec/bundler/runtime/platform_spec.rb
@@ -61,16 +61,16 @@ RSpec.describe "Bundler.setup with multi platform stuff" do
     build_repo4 do
       build_gem "nokogiri", "1.11.1" do |s|
         s.add_dependency "mini_portile2", "~> 2.5.0"
-        s.add_dependency "racc", "~> 1.5.2"
+        s.add_dependency "racca", "~> 1.5.2"
       end
 
       build_gem "nokogiri", "1.11.1" do |s|
         s.platform = Bundler.local_platform
-        s.add_dependency "racc", "~> 1.4"
+        s.add_dependency "racca", "~> 1.4"
       end
 
       build_gem "mini_portile2", "2.5.0"
-      build_gem "racc", "1.5.2"
+      build_gem "racca", "1.5.2"
     end
 
     good_lockfile = <<~L
@@ -80,10 +80,10 @@ RSpec.describe "Bundler.setup with multi platform stuff" do
           mini_portile2 (2.5.0)
           nokogiri (1.11.1)
             mini_portile2 (~> 2.5.0)
-            racc (~> 1.5.2)
+            racca (~> 1.5.2)
           nokogiri (1.11.1-#{Bundler.local_platform})
-            racc (~> 1.4)
-          racc (1.5.2)
+            racca (~> 1.4)
+          racca (1.5.2)
 
       PLATFORMS
         #{lockfile_platforms("ruby")}
@@ -91,6 +91,11 @@ RSpec.describe "Bundler.setup with multi platform stuff" do
       DEPENDENCIES
         nokogiri (~> 1.11)
 
+      CHECKSUMS
+        nokogiri (1.11.1)
+        #{checksum_for_repo_gem gem_repo4, "nokogiri", "1.11.1", Bundler.local_platform}
+        #{checksum_for_repo_gem gem_repo4, "racca", "1.5.2"}
+
       BUNDLED WITH
          #{Bundler::VERSION}
     L
diff --git a/spec/bundler/runtime/setup_spec.rb b/spec/bundler/runtime/setup_spec.rb
index d4234d684f..3abbea449b 100644
--- a/spec/bundler/runtime/setup_spec.rb
+++ b/spec/bundler/runtime/setup_spec.rb
@@ -1227,6 +1227,9 @@ end
 
         DEPENDENCIES
           rack
+
+        CHECKSUMS
+          #{checksum_for_repo_gem gem_repo1, "rack", "1.0.0"}
       L
 
       if ruby_version