Forward thinking open source projects are adopting SPDXIDs in source files (initially U-Boot, but now much wider use like Zephyr, Linux Kernel, etc.) With these easy to find "SPDX-License-Identifier:" strings, generating an SPDX document for a project is a matter of iterating over the files in a project and extracting the information from these SPDXIDs and calculating checksums. Creating an open source tool to do this will aid these projects in generating accurate SBOM information at release time. This tool should be implemented as a command line, so it can be incorporated into builds, and options can be added. Goal is that projects that use SPDX identifiers can automatically generate a SPDX document as a Software Bill of Materials (SBOM) on demand (build, release, etc.).