Exploring Scala Tooling ecosystem

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" summary

Compares concrete tools and behaviors: Metals uses SemanticDB and connects to Bloop or SBT via BSP, giving near‑real‑time compiler feedback, signature popups and code evaluation while editing; Build Server Protocol keeps incremental compilation state so restarts avoid full recompiles; shows which build tools support parallel or cached builds (SBT, Mill, Pants, Bazel, Fury, CBT) and which are used at scale; notes where functionality is incomplete or works (e.g. Metals now production ready, Pants/Bazel for large mono repos).

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" chapters (4)

1. 0:00Start
2. 5:10LSP: Language Server Protocol The Language Server Protocol defines the protocol used between an editor or an IDE and a language server that provides language features like auto complete, go to definition, find all references, etc.
3. 14:06Compiling deduplication • Compiling isolation • Zipkin tracing support • Use Ammonite by default in bloop console Support for Scala 2.13.x, JDK 9 & 11
4. 15:14CBT: Chris' Build Tool • Quite simple (even the source code!) Builds are programs (in Scala) • JVM method invocation • Reproducible builds • Command line and shell integration • Aims to make it easy for devs to be in control • Built-in Dotly support (experimental)

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