affected vs Blaze

affected is a free, MIT-licensed command-line tool for identifying monorepo packages touched by Git changes and running tests or other commands on those packages. It traces transitive dependencies and can explain the chain from a change to an affected package. The README says it detects project type and dependency graph automatically to get started without configuration. Supported ecosystems include Cargo, npm, pnpm, Yarn, Bun, Go, Python, Maven, Gradle, .NET, Swift, Dart/Flutter, Elixir, and Scala/sbt. CLI commands cover listing packages, testing, running commands, viewing graphs, CI, initialization, and watch mode. Execution options include parallel jobs, dry-run previews, timeouts, package filters, and skip patterns. Outputs include JSON, JUnit XML, CI formats, shell completions, dependency trees, and DOT graphs. GitHub Actions support includes a setup action and dynamic job matrices; a companion action can post and update pull request comments with affected packages and reasons. Installation options include Homebrew, Python and language package managers, GitHub Actions, and release binaries. It runs on Linux, macOS, and Windows.

Blaze is a build system aimed mainly at monorepos, with general task running and productivity tooling as other uses. It runs multiple tasks across a repository and manages dependencies between projects, supporting parallel execution and a configurable local cache for completed work. Configuration options include JSON, YAML, and Jsonnet, with advanced templating. A plugin system runs tasks through executors. Blaze says it supports any language or framework without affecting application code, and teams can keep integration and deployment processes in the monorepo for reuse. It does not manage application dependencies, analyze code, or track project technologies. Linux, macOS, and Windows are listed as supported platforms, with prebuilt binaries for common platforms. The project is still under development, and its site invites help stabilizing it ahead of an alpha release. The Free plan costs nothing. Documentation directs users to GitHub Issues for problems and bugs, and the site links to a Discord community.