Buck2 vs Rake

Buck2 is a free build system from Meta for large-scale repositories that combine multiple programming languages. It uses Starlark rules, a dynamic dependency graph, and incremental actions to support extensible builds. Its language table lists prelude rules for C/C++, Erlang, Go, Haskell, Java, Kotlin, OCaml, Python, and Rust, though usability varies by language. Build actions can run remotely through services exposing Bazel's remote execution API; the project lists BuildBarn, BuildBuddy, EngFlow, and NativeLink as compatible with its distributed compilation support. Buck2 supports filesystem watching and can integrate with Meta's optional Eden virtual filesystem. Rules are hermetic by default and missing dependencies are errors, but local-only build steps are not sandboxed. The project describes Buck2 as early-stage and says it has no stable release tag; its latest binary tag changes with repository pushes. It warns that outside users may encounter rough edges, missing features, and missing toolchains. Source and binaries are available under MIT and Apache-2.0 licenses. The project directs users to GitHub for issue reports and offers a community Discord server.

Rake is a Make-like task runner written in Ruby for defining tasks and their dependencies. Its Rakefiles use standard Ruby syntax, and tasks can declare prerequisite tasks. Rule patterns can generate implicit tasks, while FileLists provide array-like handling for file names and paths. Rake includes packaged tasks, including tasks for building tarballs, and can execute tasks in parallel. The documentation’s example has a default task call a test task that runs a Ruby unit test file. Rake runs on Linux, macOS, and Windows; the project lists Ruby 2.0.0 or later as a requirement. Installation is with `gem install rake`. Rake is free under an MIT-style license, with a listed plan of free. The project credits Jim Weirich as its original creator and Hiroshi SHIBATA as maintainer of Rake 10 and later. It is provided as is, without express or implied warranties.