Copilot content addressable test

[jenshenny]

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What is your fix for the problem, implemented in this PR?

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• Describe the problem / feature
• Write tests for features and bug fixes
• Write code to solve the problem
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[Copilot]

Pull request overview

Adds content-addressable platform gems keyed by SHA-256 prefixes and Ruby ABI metadata across RubyGems and Bundler.

Changes:

• Adds content-address-aware building, installation, fetching, resolution, and compact-index handling.
• Extends specifications, tuples, lockfiles, and CLI commands with content-address and Ruby ABI data.
• Adds broad RubyGems and Bundler test coverage.

Reviewed changes

Copilot reviewed 83 out of 83 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
Manifest.txt	Packages the new content-address module.
lib/rubygems.rb	Autoloads content-address support.
lib/rubygems/basic_specification.rb	Uses content addresses in full names.
lib/rubygems/content_address.rb	Defines address validation and applicability.
lib/rubygems/specification.rb	Adds content-address and Ruby ABI metadata.
lib/rubygems/stub_specification.rb	Parses content-addressed gemspec stubs.
lib/rubygems/name_tuple.rb	Extends tuples with address and ABI fields.
lib/rubygems/package.rb	Builds and verifies addressed packages.
lib/rubygems/package_task.rb	Moves the filename returned by package builds.
lib/rubygems/installer.rb	Assigns verified addresses during installation.
lib/rubygems/source.rb	Decodes compact-index content-address metadata.
lib/rubygems/source/local.rb	Verifies local addressed packages.
lib/rubygems/spec_fetcher.rb	Decodes and filters addressed tuples.
lib/rubygems/compact_index_client.rb	Renames the compact-index suffix field.
lib/rubygems/safe_marshal.rb	Permits tuple address and ABI fields.
lib/rubygems/query_utils.rb	Displays platform and ABI variants.
lib/rubygems/resolver.rb	Prefers addressed resolver candidates.
lib/rubygems/resolver/specification.rb	Adds resolver address metadata.
lib/rubygems/resolver/spec_specification.rb	Delegates specification addresses.
lib/rubygems/resolver/installer_set.rb	Preserves local package addresses.
lib/rubygems/resolver/index_specification.rb	Distinguishes addressed index specifications.
lib/rubygems/resolver/api_specification.rb	Interprets compact-index address suffixes.
lib/rubygems/resolver/api_set.rb	Passes suffix metadata to API specifications.
lib/rubygems/commands/build_command.rb	Adds the --ruby-abi build option.
lib/rubygems/commands/dependency_command.rb	Decodes addressed remote dependencies.
lib/rubygems/commands/outdated_command.rb	Uses addresses for cooldown timestamps.
lib/rubygems/commands/push_command.rb	Adds platform and ABI package selection.
lib/rubygems/commands/update_command.rb	Handles addressed cooldown tuples.
lib/rubygems/commands/yank_command.rb	Sends Ruby ABI data when yanking.
lib/bundler/endpoint_specification.rb	Decodes addressed endpoint specifications.
lib/bundler/fetcher.rb	Treats index field three as a suffix.
lib/bundler/lazy_specification.rb	Persists addresses through locking.
lib/bundler/lockfile_parser.rb	Parses addressed lockfile entries.
lib/bundler/match_platform.rb	Prefers compatible addressed variants.
lib/bundler/remote_specification.rb	Adds address-aware remote names.
lib/bundler/resolver.rb	Retains distinct addressed variants.
lib/bundler/rubygems_ext.rb	Adds cross-version compatibility extensions.
lib/bundler/rubygems_gem_installer.rb	Assigns addresses in Bundler installs.
lib/bundler/rubygems_integration.rb	Reads and verifies package addresses.
lib/bundler/source/rubygems.rb	Preserves addresses after downloads.
lib/bundler/stub_specification.rb	Copies addresses from RubyGems stubs.
spec/bundler/endpoint_specification_spec.rb	Tests endpoint address metadata.
spec/bundler/lockfile_parser_spec.rb	Tests addressed lockfile parsing.
spec/bundler/override_spec.rb	Updates override test doubles.
spec/bundler/remote_specification_spec.rb	Tests legacy remote suffix handling.
spec/install/cooldown_spec.rb	Migrates cooldown tests to the v2 index.
spec/install/gemfile/content_addressable_spec.rb	Tests addressed Bundler installation flows.
spec/other/ext_spec.rb	Tests address-aware lock names.
spec/support/artifice/compact_index_cooldown.rb	Removes the old cooldown endpoint.
spec/support/artifice/compact_index_v2.rb	Activates the v2 compact-index endpoint.
spec/support/artifice/helpers/compact_index.rb	Uses full names for checksums.
spec/support/artifice/helpers/compact_index_cooldown.rb	Removes the old cooldown helper.
spec/support/artifice/helpers/compact_index_v2.rb	Adds addressed compact-index fixtures.
spec/support/builders.rb	Supports building Ruby ABI variants.
test/rubygems/helper.rb	Adds addressed gem fixture helpers.
test/rubygems/test_gem_commands_build_command.rb	Tests ABI-scoped builds.
test/rubygems/test_gem_commands_dependency_command.rb	Tests addressed dependency output.
test/rubygems/test_gem_commands_fetch_command.rb	Tests addressed fetching.
test/rubygems/test_gem_commands_info_command.rb	Tests platform and ABI details.
test/rubygems/test_gem_commands_list_command.rb	Tests addressed remote listings.
test/rubygems/test_gem_commands_outdated_command.rb	Tests addressed cooldown reporting.
test/rubygems/test_gem_commands_push_command.rb	Tests push selectors and ambiguity handling.
test/rubygems/test_gem_commands_search_command.rb	Tests addressed search output.
test/rubygems/test_gem_commands_update_command.rb	Tests addressed updates and cooldowns.
test/rubygems/test_gem_commands_yank_command.rb	Tests ABI-aware yanking.
test/rubygems/test_gem_compact_index_client.rb	Updates suffix-index assertions.
test/rubygems/test_gem_content_address.rb	Tests address recognition and applicability.
test/rubygems/test_gem_dependency_installer.rb	Tests local addressed installation.
test/rubygems/test_gem_installer.rb	Tests verification and coexistence.
test/rubygems/test_gem_name_tuple.rb	Tests extended tuple behavior.
test/rubygems/test_gem_package.rb	Tests ABI builds and validation.
test/rubygems/test_gem_package_task.rb	Tests returned build filenames.
test/rubygems/test_gem_remote_fetcher.rb	Tests addressed download and installation.
test/rubygems/test_gem_resolver.rb	Tests addressed candidate preference.
test/rubygems/test_gem_resolver_api_set.rb	Tests addressed API-set results.
test/rubygems/test_gem_resolver_api_specification.rb	Tests addressed API specifications.
test/rubygems/test_gem_resolver_index_specification.rb	Tests addressed index identity.
test/rubygems/test_gem_safe_marshal.rb	Tests tuple metadata unmarshalling.
test/rubygems/test_gem_source.rb	Tests compact-index metadata decoding.
test/rubygems/test_gem_source_local.rb	Tests rejection of mismatched local addresses.
test/rubygems/test_gem_spec_fetcher.rb	Tests addressed tuple fetching.
test/rubygems/test_gem_specification.rb	Tests ABI derivation and serialization.
test/rubygems/test_gem_stub_specification.rb	Tests addressed stub parsing.

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