What is flutter pub run Build_runner build?

build_runner is a Dart package that will help us to generate files using Dart code . We will configure Builder files, via a build. yaml; once it is configured, we will receive updates once a build is triggered, or a file has changed, and we will be able to parse the code that changed or meets a certain criteria.

The build_runner package provides general-purpose commands for generating files , and for optionally testing the generated files or serving both source and generated files. … The build_runner commands work with builders—packages that use the Dart build system to generate output files from input files.

A build system for Dart code generation and modular compilation. … The build_runner package provides a concrete way of generating files using Dart code , outside of tools like pub . Unlike pub serve/build , files are always generated directly on disk, and rebuilds are incremental – inspired by tools such as Bazel.