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Building the SBOM tool from source code

The SBOM tool is a cross-platform, C#-based tool compiled using the Microsoft .NET 8 cross-platform, open-source developer platform. Follow the instructions provided which will guide the user in building the sbom tool from the source file.

Prerequisites

Understanding the source structure

Users can find source files in the following folder locations:

  • All the source code for the tool: src folder
  • Tests: test folder
  • The core engine (generates SBOMs): Microsoft.Sbom.Api project

The sbom tool code is designed to be as extensible as possible. All the interfaces for extending the SBOM tool are located in the Microsoft.Sbom.Extensions project. Once such extension is the IManifestGenerator interface, which the SBOM tool uses to serialize a SBOM to a specific format. The Microsoft.Sbom.Parsers.Spdx22SbomParser project implements this interface, allowing the SBOM tool to serialize a SBOM in accordance with the prescribed SPDX version 2.2 standard format. The equivalent for SPDX 3.0 is present in Microsoft.Sbom.Parsers.Spdx30SbomParser. The extensions project has additional interfaces designed to extend the SBOM tool.

The Microsoft.Sbom.Common project contains the base of common code, constants, etc. that all the projects can call.

The Microsoft.Sbom.Contracts project defines the interfaces that the tool uses to call the SBOM tool using a C# API. The ISbomGenerator class defines two methods that the tool uses to directly call the SBOM tool from C# code. The Microsoft.Sbom.Tool project defines a command line interface (CLI) interface to talk to the SBOM tool.

Building on Visual Studio

After opening the Visual Studio 2022 application, open the Microsoft.Sbom.sln file in the root of the repository. Users can either press Ctrl + Shift + B or select Build from the menu in order to build the application.

  1. Set the Microsoft.Sbom.Tool project as the startup project (rightclick-> Set as Startup Project)
  2. Set Run arguments for the Microsoft.Sbom.Tool project (rightclick->properties->Debug)
    Minimum: generate -b <drop path> -bc <build components path> -pn <package name> -pv <package version> -ps <company name> -nsb <namespace uri base>
  3. Going forward, users can press 'F5' after making changes. This action will build the changes and start the process in debug mode (stopping at breakpoints).

A good new-user tutorial for Visual Studio is available at this.

Building on the command line

In the user's shell of choice, ensure that the Dotnet SDK is installed and available on the PATH for the shell. Navigate to the root of the repository, then execute the following command for building the repository:

dotnet build

Users can run the sbom tool using this command which contains the minimum required set of parameters:

dotnet run --project src/Microsoft.Sbom.Tool generate -b <drop path> -bc <build components path> -pn <package name> -pv <package version> -ps <company name> -nsb <namespace uri base>

Building on ARM based devices running OSX

The tool provides an osx-arm64 version of the tool. If you need to build one locally, you can build it as follows:

The following command will produce a dll that can be executed on ARM based devices running OSX and can be modified to suit your needs:

dotnet publish src/Microsoft.Sbom.Tool/Microsoft.Sbom.Tool.csproj --configuration Release --output bin --runtime osx-arm64 -p:TargetFramework=net8.0 -p:SelfContained=true -p:PublishSingleFile=true -p:IncludeNativeLibrariesForSelfExtract=true -p:IncludeAllContentForSelfExtract=true -p:DebugType=None

After running this command you can execute the tool like this:

./bin/Microsoft.Sbom.Tool generate -b ~/tmp/sbom-tool/ -bc ~/tmp/sbom-tool/ -pn TestProject -pv 1.2.3 -ps Microsoft

Building using Codespaces

After accessing GitHub Codespaces, select the Code button from the repository homepage, then select Open with Codespaces. That's it! Users will then have a full developer environment that supports debugging, testing, auto complete, jump to definitions, and everything that one would expect.

Building using Docker

Follow applicable steps or procedures for starting up the applicable Linux distribution.

Clone this repo.

Build the docker image.

git clone https://github.com/microsoft/sbom-tool
cd sbom-tool
docker build . -t ms_sbom_tool

Use docker bind mounts when using the tool to scan the desired target directories.