Fix Conan project-level download urls

Fixes a bug that was returning instance-level
conan urls when project-level urls were requested.

changelogs/unreleased/270129-conan-project-download-urls-bug.yml

+---
+title: Fix Conan project-level API to return correct download-urls and fix Conan project-level
+  functionality
+merge_request: 56899
+author:
+type: fixed

doc/user/packages/conan_repository/index.md

@@ -402,16 +402,3 @@ The GitLab Conan repository supports the following Conan CLI commands:
   packages you have permission to view.
 - `conan info`: View the information on a given package from the Package Registry.
 - `conan remove`: Delete the package from the Package Registry.
-
-## Troubleshooting Conan packages
-
-### `ERROR: <package> was not found in remote <remote>`
-
-When you attempt to install a Conan package, you might receive a `404` error
-like `ERROR: <package> was not found in remote <remote>`.
-
-This issue occurs when you request a download from the project-level Conan API.
-The resulting URL is missing is project's `/<id>` and Conan commands, like
-`conan install`, fail.
-
-For more information, see [issue 270129](https://gitlab.com/gitlab-org/gitlab/-/issues/270129).

lib/api/helpers/packages/conan/api_helpers.rb

@@ -14,7 +14,8 @@ module API
               package,
               current_user,
               project,
-              conan_package_reference: params[:conan_package_reference]
+              conan_package_reference: params[:conan_package_reference],
+              id: params[:id]
             )
 
             render_api_error!("No recipe manifest found", 404) if yield(presenter).empty?

spec/support/shared_contexts/requests/api/conan_packages_shared_context.rb

@@ -41,13 +41,6 @@ RSpec.shared_context 'conan recipe endpoints' do
   let(:jwt) { build_jwt(personal_access_token) }
   let(:headers) { build_token_auth_header(jwt.encoded) }
   let(:conan_package_reference) { '123456789' }
-  let(:presenter) { double('::Packages::Conan::PackagePresenter') }
-
-  before do
-    allow(::Packages::Conan::PackagePresenter).to receive(:new)
-      .with(package, user, package.project, any_args)
-      .and_return(presenter)
-  end
 end
 
 RSpec.shared_context 'conan file download endpoints' do

spec/support/shared_examples/requests/api/conan_packages_shared_examples.rb

@@ -205,6 +205,14 @@ RSpec.shared_examples 'empty recipe for not found package' do
       'aa/bb/%{project}/ccc' % { project: ::Packages::Conan::Metadatum.package_username_from(full_path: project.full_path) }
     end
 
+    let(:presenter) { double('::Packages::Conan::PackagePresenter') }
+
+    before do
+      allow(::Packages::Conan::PackagePresenter).to receive(:new)
+        .with(package, user, package.project, any_args)
+        .and_return(presenter)
+    end
+
     it 'returns not found' do
       allow(::Packages::Conan::PackagePresenter).to receive(:new)
         .with(
@@ -248,8 +256,6 @@ RSpec.shared_examples 'recipe download_urls' do
       'conanmanifest.txt' => "#{url_prefix}/packages/conan/v1/files/#{package.conan_recipe_path}/0/export/conanmanifest.txt"
     }
 
-    allow(presenter).to receive(:recipe_urls) { expected_response }
-
     subject
 
     expect(json_response).to eq(expected_response)
@@ -268,8 +274,6 @@ RSpec.shared_examples 'package download_urls' do
       'conan_package.tgz' => "#{url_prefix}/packages/conan/v1/files/#{package.conan_recipe_path}/0/package/123456789/0/conan_package.tgz"
     }
 
-    allow(presenter).to receive(:package_urls) { expected_response }
-
     subject
 
     expect(json_response).to eq(expected_response)
@@ -309,13 +313,14 @@ RSpec.shared_examples 'recipe snapshot endpoint' do
 
   context 'with existing package' do
     it 'returns a hash of files with their md5 hashes' do
+      conan_file_file = package.package_files.find_by(file_name: 'conanfile.py')
+      conan_manifest_file = package.package_files.find_by(file_name: 'conanmanifest.txt')
+
       expected_response = {
-        'conanfile.py'      => 'md5hash1',
-        'conanmanifest.txt' => 'md5hash2'
+        'conanfile.py'      => conan_file_file.file_md5,
+        'conanmanifest.txt' => conan_manifest_file.file_md5
       }
 
-      allow(presenter).to receive(:recipe_snapshot) { expected_response }
-
       subject
 
       expect(json_response).to eq(expected_response)
@@ -333,13 +338,11 @@ RSpec.shared_examples 'package snapshot endpoint' do
   context 'with existing package' do
     it 'returns a hash of md5 values for the files' do
       expected_response = {
-        'conaninfo.txt'     => "md5hash1",
-        'conanmanifest.txt' => "md5hash2",
-        'conan_package.tgz' => "md5hash3"
+        'conaninfo.txt'     => "12345abcde",
+        'conanmanifest.txt' => "12345abcde",
+        'conan_package.tgz' => "12345abcde"
       }
 
-      allow(presenter).to receive(:package_snapshot) { expected_response }
-
       subject
 
       expect(json_response).to eq(expected_response)