| commit | 4ca5dfa0a66e9baf6c3953830fc53e6da27b9f42 | [log] [tgz] |
|---|---|---|
| author | Philipp Wollermann <philwo@google.com> | Wed Feb 01 13:45:55 2017 +0000 |
| committer | Yun Peng <pcloudy@google.com> | Wed Feb 01 14:31:25 2017 +0000 |
| tree | adc4f37dfa5141eb21c699d3edf5b1330f6d0353 | |
| parent | 46d31b5f1e3201651bf621da2674ff2f070ce824 [diff] |
Add a flag to print the effective (Spawn)ActionContexts for debugging. By specifying the flag "--debug_print_action_contexts", Bazel will print the contents of the internal SpawnActionContext and ContextMap maps, which allows developers to see which kind of actions are run using which strategy. Example output of Bazel at HEAD: $ ./output/bazel build --debug_print_action_contexts INFO: SpawnActionContextMap: "" = LinuxSandboxedStrategy INFO: SpawnActionContextMap: "Closure" = WorkerSpawnStrategy INFO: SpawnActionContextMap: "Javac" = WorkerSpawnStrategy INFO: ContextMap: Context = BazelWorkspaceStatusActionContext INFO: ContextMap: CppCompileActionContext = SpawnGccStrategy INFO: ContextMap: CppLinkActionContext = SpawnLinkStrategy INFO: ContextMap: FileWriteActionContext = FileWriteStrategy INFO: ContextMap: FilesetActionContext = FilesetActionContextImpl INFO: ContextMap: IncludeScanningContext = DummyIncludeScanningContext INFO: ContextMap: SpawnActionContext = LinuxSandboxedStrategy INFO: ContextMap: SymlinkTreeActionContext = SymlinkTreeStrategy INFO: ContextMap: TestActionContext = ExclusiveTestStrategy (Can you spot the bug found by this feature here? The default TestActionContext is ExclusiveTestStrategy, which is probably not what we want.) -- PiperOrigin-RevId: 146233390 MOS_MIGRATED_REVID=146233390
{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.