Respect --noexperimental_check_output_files in FileSystemValueChecker. FileStateValues for output files can make their way into the Skyframe graph if a source file is symlink to an output file. Also fix a bug where ExternalFilesHelper#isExternalFileSeen would always return true after returning true once in the past. This meant if an external file ever made its way into the Skyframe graph, we would always do a full graph scan at the beginning of each build (iow, we would always waste some CPU time doing nothing interesting). -- MOS_MIGRATED_REVID=118190190
{Fast, Correct} - Choose two
Bazel is a build tool that builds code quickly and reliably. It is used to build the majority of Google‘s software, and thus it has been designed to handle build problems present in Google’s development environment, including:
A massive, shared code repository, in which all software is built from source. Bazel has been built for speed, using both caching and parallelism to achieve this. Bazel is critical to Google's ability to continue to scale its software development practices as the company grows.
An emphasis on automated testing and releases. Bazel has been built for correctness and reproducibility, meaning that a build performed on a continuous build machine or in a release pipeline will generate bitwise-identical outputs to those generated on a developer's machine.
Language and platform diversity. Bazel's architecture is general enough to support many different programming languages within Google, and can be used to build both client and server software targeting multiple architectures from the same underlying codebase.
Find more background about Bazel in our FAQ.