Support SemVer versions on generic packages

Version strings must now be in the [SemVer](https://semver.org/) format

changelogs/unreleased/273034-support-semver-on-generic-packages.yml

+---
+title: Relax version validation on generic packages
+merge_request: 56755
+author:
+type: changed

doc/user/packages/generic_packages/index.md

@@ -47,7 +47,7 @@ PUT /projects/:id/packages/generic/:package_name/:package_version/:file_name?sta
 | -------------------| --------------- | ---------| -------------------------------------------------------------------------------------------------------------------------------- |
 | `id`               | integer/string  | yes      | The ID or [URL-encoded path of the project](../../../api/README.md#namespaced-path-encoding).                                              |
 | `package_name`     | string          | yes      | The package name. It can contain only lowercase letters (`a-z`), uppercase letter (`A-Z`), numbers (`0-9`), dots (`.`), hyphens (`-`), or underscores (`_`).
-| `package_version`  | string          | yes      | The package version. It can contain only numbers (`0-9`), and dots (`.`). Must be in the format of `X.Y.Z`, i.e. should match `/\A\d+\.\d+\.\d+\z/` regular expression.
+| `package_version`  | string          | yes      | The package version. The following regex validates this: `\A(\.?[\w\+-]+\.?)+\z`. You can test your version strings on [Rubular](https://rubular.com/r/aNCV0wG5K14uq8).
 | `file_name`        | string          | yes      | The filename. It can contain only lowercase letters (`a-z`), uppercase letter (`A-Z`), numbers (`0-9`), dots (`.`), hyphens (`-`), or underscores (`_`).
 | `status`           | string          | no       | The package status. It can be `default` (default) or `hidden`. Hidden packages do not appear in the UI or [package API list endpoints](../../../api/packages.md).
 

lib/gitlab/regex.rb

@@ -181,7 +181,7 @@ module Gitlab
       end
 
       def generic_package_version_regex
-        /\A\d+\.\d+\.\d+\z/
+        maven_version_regex
       end
 
       def generic_package_name_regex

spec/lib/gitlab/regex_spec.rb

@@ -667,7 +667,14 @@ RSpec.describe Gitlab::Regex do
 
     it { is_expected.to match('1.2.3') }
     it { is_expected.to match('1.3.350') }
-    it { is_expected.not_to match('1.3.350-20201230123456') }
+    it { is_expected.to match('1.3.350-20201230123456') }
+    it { is_expected.to match('1.2.3-rc1') }
+    it { is_expected.to match('1.2.3g') }
+    it { is_expected.to match('1.2') }
+    it { is_expected.to match('1.2.bananas') }
+    it { is_expected.to match('v1.2.4-build') }
+    it { is_expected.to match('d50d836eb3de6177ce6c7a5482f27f9c2c84b672') }
+    it { is_expected.to match('this_is_a_string_only') }
     it { is_expected.not_to match('..1.2.3') }
     it { is_expected.not_to match('  1.2.3') }
     it { is_expected.not_to match("1.2.3  \r\t") }

spec/models/packages/package_spec.rb

@@ -367,7 +367,14 @@ RSpec.describe Packages::Package, type: :model do
         it { is_expected.to validate_presence_of(:version) }
         it { is_expected.to allow_value('1.2.3').for(:version) }
         it { is_expected.to allow_value('1.3.350').for(:version) }
-        it { is_expected.not_to allow_value('1.3.350-20201230123456').for(:version) }
+        it { is_expected.to allow_value('1.3.350-20201230123456').for(:version) }
+        it { is_expected.to allow_value('1.2.3-rc1').for(:version) }
+        it { is_expected.to allow_value('1.2.3g').for(:version) }
+        it { is_expected.to allow_value('1.2').for(:version) }
+        it { is_expected.to allow_value('1.2.bananas').for(:version) }
+        it { is_expected.to allow_value('v1.2.4-build').for(:version) }
+        it { is_expected.to allow_value('d50d836eb3de6177ce6c7a5482f27f9c2c84b672').for(:version) }
+        it { is_expected.to allow_value('this_is_a_string_only').for(:version) }
         it { is_expected.not_to allow_value('..1.2.3').for(:version) }
         it { is_expected.not_to allow_value('  1.2.3').for(:version) }
         it { is_expected.not_to allow_value("1.2.3  \r\t").for(:version) }

spec/requests/api/generic_packages_spec.rb

@@ -16,6 +16,7 @@ RSpec.describe API::GenericPackages do
   let_it_be(:project_deploy_token_ro) { create(:project_deploy_token, deploy_token: deploy_token_ro, project: project) }
   let_it_be(:deploy_token_wo) { create(:deploy_token, read_package_registry: false, write_package_registry: true) }
   let_it_be(:project_deploy_token_wo) { create(:project_deploy_token, deploy_token: deploy_token_wo, project: project) }
+
   let(:user) { personal_access_token.user }
   let(:ci_build) { create(:ci_build, :running, user: user) }
 
@@ -326,6 +327,34 @@ RSpec.describe API::GenericPackages do
               end
             end
           end
+
+          context 'different versions' do
+            where(:version, :expected_status) do
+              '1.3.350-20201230123456'                   | :created
+              '1.2.3'                                    | :created
+              '1.2.3g'                                   | :created
+              '1.2'                                      | :created
+              '1.2.bananas'                              | :created
+              'v1.2.4-build'                             | :created
+              'd50d836eb3de6177ce6c7a5482f27f9c2c84b672' | :created
+              '..1.2.3'                                  | :bad_request
+              '1.2.3-4/../../'                           | :bad_request
+              '%2e%2e%2f1.2.3'                           | :bad_request
+            end
+
+            with_them do
+              let(:expected_package_diff_count) { expected_status == :created ? 1 : 0 }
+              let(:headers) { workhorse_headers.merge(auth_header) }
+
+              subject { upload_file(params, headers, package_version: version) }
+
+              it "returns the #{params[:expected_status]}", :aggregate_failures do
+                expect { subject }.to change { project.packages.generic.count }.by(expected_package_diff_count)
+
+                expect(response).to have_gitlab_http_status(expected_status)
+              end
+            end
+          end
         end
       end
 
@@ -418,8 +447,8 @@ RSpec.describe API::GenericPackages do
       end
     end
 
-    def upload_file(params, request_headers, send_rewritten_field: true, package_name: 'mypackage', file_name: 'myfile.tar.gz')
-      url = "/projects/#{project.id}/packages/generic/#{package_name}/0.0.1/#{file_name}"
+    def upload_file(params, request_headers, send_rewritten_field: true, package_name: 'mypackage', package_version: '0.0.1', file_name: 'myfile.tar.gz')
+      url = "/projects/#{project.id}/packages/generic/#{package_name}/#{package_version}/#{file_name}"
 
       workhorse_finalize(
         api(url),