Add config file class for C# nuget `*.csproj`

What does this MR do and why?

Background

The Repository X-Ray is a tool that searches for dependency manager configuration or lock files and then extracts a list of libraries from the content.

In #474306 (comment 2025085630), we decided to migrate the Repository X-Ray functionality into the GitLab Rails monolith. This gives us two main benefits: (i) it will eventually allow us to run the service outside of the CI pipeline, and (ii) we can maintain the parsing logic centrally so that other domains can utilize it.

Base MR

In !162313 (merged), we introduced the ConfigFiles::Base class where the intention is for each dependency manager config file type to be represented by a child class. The child class contains the parsing logic to extract a list of libraries and their versions from the file content.

This MR

In this MR, we introduce the CsharpNuget config file class that parses *.csproj for the language C#.

For references to the existing parsing logic in the Repository X-Ray repo, see:

• https://gitlab.com/gitlab-org/code-creation/repository-x-ray/-/blob/6634564818dffdeac938014a190b0c604b1da6e0/internal/scanner/scanner.go#L38
• https://gitlab.com/gitlab-org/code-creation/repository-x-ray/-/blob/6634564818dffdeac938014a190b0c604b1da6e0/internal/scanner/scanner.go#L378

Resolves part of #476177 (closed).

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

How to set up and validate locally

1. Enable the feature flag: Feature.enable(:ai_enable_internal_repository_xray_service)

2. Create a new blank project and add the following file to the repo:

subdir/MyProj.csproj:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Extensions.Hosting" Version="6.0.1" />
    <PackageReference Include="MessagePack" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design">
      <PrivateAssets>all</PrivateAssets>
    </PackageReference>
    <PackageReference Include="Sentry" Version="5.3.1" PrivateAssets="All" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..local/.Date.csproj" />
  </ItemGroup>

  <ItemGroup>
    <None Include="artifacts-icon.png" Pack="true" />
    <None Include="README.md" Pack="true" />
  </ItemGroup>
</Project>

3. Observe that the X-ray report for the config file is recorded:

project = Project.last # Should be the project you created earlier
project.reload.xray_reports

Related to #476177 (closed)

changed milestone to %17.5

added Category:Code Suggestions Deliverable backend devopscreate feature flagskipped groupcode creation sectiondev typefeature workflowin review labels

mentioned in issue #476177 (closed)

assigned to @lma-git

added 1 commit

• 4684c467 - Add C# nuget config file class

Compare with previous version

added 1 commit

• 91d8f73d - Add C# nuget config file class

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	2 Messages
	CHANGELOG missing: If this merge request needs a changelog entry, add the Changelog trailer to the commit message you want to add to the changelog. If this merge request doesn't need a CHANGELOG entry, feel free to ignore this message.
	This merge request adds or changes documentation files. A review from the Technical Writing team before you merge is recommended. Reviews can happen after you merge.

Documentation review

The following files require a review from a technical writer:

• doc/user/project/repository/code_suggestions/repository_xray.md (Link to current live version)

The review does not need to block merging this merge request. See the:

• Metadata for the *.md files that you've changed. The first few lines of each *.md file identify the stage and group most closely associated with your docs change.
• The Technical Writer assigned for that stage and group.
• Documentation workflows for information on when to assign a merge request for review.

Reviewer roulette

Category	Reviewer	Maintainer
backend	@paulobarros (UTC+2, 9 hours ahead of author)	@jessieay (UTC-7, same timezone as author)

Please refer to documentation page for guidance on how you can benefit from the Reviewer Roulette, or use the GitLab Review Workload Dashboard to find other available reviewers.

If needed, you can retry the danger-review job that generated this comment.

Generated by Danger

marked this merge request as ready

changed the description

Hi @praba.m7n! Could you please do the first backend review here? Please send to a maintainer if it looks okay to you. Thanks!

requested review from @praba.m7n

added 215 commits

• 91d8f73d...0386c734 - 213 commits from branch master
• 8ca3ae65 - Add C# nuget config file class
• 0cf7f419 - Update repository x-ray supported lang table

Compare with previous version

added documentation label

requested review from @imand3r and removed review request for @praba.m7n

approved this merge request

requested review from @hustewart

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mentioned in issue gitlab-com/www-gitlab-com#13970 (closed)

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• You are the last maintainer of this merge request
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If all the criteria above apply, please set auto-merge for this merge request.

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resolved all threads

enabled automatic add to merge train when checks pass

E2E Test Result Summary

allure-report-publisher generated test report!

e2e-test-on-gdk: test report for 0cf7f419

expand test summary

+------------------------------------------------------------------+
|                          suites summary                          |
+-------------+--------+--------+---------+-------+-------+--------+
|             | passed | failed | skipped | flaky | total | result |
+-------------+--------+--------+---------+-------+-------+--------+
| Data Stores | 33     | 0      | 1       | 0     | 34    | ✅     |
| Package     | 24     | 0      | 11      | 0     | 35    | ✅     |
| Release     | 5      | 0      | 0       | 0     | 5     | ✅     |
| Create      | 128    | 0      | 17      | 0     | 145   | ✅     |
| Plan        | 75     | 0      | 1       | 1     | 76    | ✅     |
| Verify      | 46     | 0      | 2       | 0     | 48    | ✅     |
| Secure      | 4      | 0      | 0       | 0     | 4     | ✅     |
| Govern      | 72     | 0      | 0       | 0     | 72    | ✅     |
| Monitor     | 8      | 0      | 0       | 0     | 8     | ✅     |
| Analytics   | 2      | 0      | 0       | 0     | 2     | ✅     |
| Manage      | 1      | 0      | 1       | 0     | 2     | ✅     |
| Fulfillment | 2      | 0      | 0       | 0     | 2     | ✅     |
+-------------+--------+--------+---------+-------+-------+--------+
| Total       | 400    | 0      | 33      | 1     | 433   | ✅     |
+-------------+--------+--------+---------+-------+-------+--------+

e2e-test-on-omnibus: test report for 0cf7f419

expand test summary

+-------------------------------------------------------------+
|                       suites summary                        |
+--------+--------+--------+---------+-------+-------+--------+
|        | passed | failed | skipped | flaky | total | result |
+--------+--------+--------+---------+-------+-------+--------+
| Create | 553    | 1      | 76      | 2     | 630   | ❌     |
+--------+--------+--------+---------+-------+-------+--------+
| Total  | 553    | 1      | 76      | 2     | 630   | ❌     |
+--------+--------+--------+---------+-------+-------+--------+

removed pipeline:run-e2e-omnibus-once label

started a merge train

merged

mentioned in commit 896f8a79

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