The key insight behind SCA is that, now-a-days developers assemble large applications using off-the-shelf open-source components and libraries, which are distributed through centralized repositories such as Maven Central, NPM, RubyGems, and PyPI. Much of the busywork of downloading sources and negotiating package versions is automated by dependency management tools like npm, pip, or gem. A single install command can pull in hundreds of libraries, demonstrating how easily large volumes of third-party code can be included in software projects. Obviously, there are many benefits to using open-source libraries: low cost, code reuse, and the flexibility to customize it to one’s needs.
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