Scripts for build steps on Buildbot

Purpose

The purpose of the script is for developer to customize build command for the builder on Buildbot.

How it works

The scripts will be run by Buildbot at corresponding build step, for example, the compile step will run compile.py. Developer can change the build command, then the builder (e.g. pull request builder) will use the changed command to do the build.

Arguments for the scripts

Refer to argument parser in main() function.

Assumptions

The Buildbot worker directory structure is:

/path/to/WORKER_ROOT/BUILDER/
    llvm.src  --> source code
    llvm.obj  --> build directory

Working directory of the scripts is /path/to/WORKER_ROOT/BUILDER