example-bazel-add-git-hash

Example for baking the current git commit hash into a bazel C++ project

Running the example

The following command runs a C++ binary that prints the git commit hash present during its build.

bazel run //:print

Files

.bazelrc	Defines the command that is executed to determine the current workspace status (runs every time bazel is run). In the case of this example python workspace_status.py is defined as the command
workspace_status.py	Executes two git commands to determine the current commit hash & workspace status. These values are returned via the standard output. See https://docs.bazel.build/versions/master/user-manual.html#flag--workspace_status_command for an in detailed description of the output format.
bake_git_hash.bzl	Defines the codegenerator rule that adds the current the git hash & status to a C++ program.
gen_cpp.py	Code generator that takes the workspace status files as an input and outputs a C++ header and source files containing the git hash & status.
main.cpp	C++ program that prints the git hash present during its build.
BUILD	Defines the codegenerator instance as well as the program that prints the git hash that was present during the build.