Original Post: The journey of a language from experimental to GA in Semgrep
The content discusses the maturation of Kotlin support to Generally Available (GA) status in Semgrep, a code analysis tool widely used for application security scanning (SAST). The process focuses on two main metrics: parse rate and rule coverage. Parse rate measures the tool’s ability to interpret the Kotlin language, and improvements were necessary to resolve parsing inconsistencies. Rule coverage involved writing rules for common vulnerabilities in popular Kotlin frameworks like Ktor and Spring Boot. Specific challenges included resolving ambiguities related to Kotlin’s string interpolation and encoding preconditions for taint rules using “taint labels.” The contributors to this effort are acknowledged, and the post concludes by inviting readers to check out the Pro rules for Kotlin in Semgrep.
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