How to repro a build from a waterfall.
Reproducing a builder's build can generally be done by following the instructions located under the 'run_recipe' link on the build page itself.
In particular, you need to install depot_tools, and then get a build checkout:
$ cd <empty dir> $ # One of: $ fetch infra # external user $ fetch infra_internal # internal user $ cd build
And then navigate to a build that you want to repo. Look for the build step which looks like:
==setup_build== setup_build running recipe: "<RECIPE_NAME>" ( 0 secs ) * ==stdio== * ==run_recipe==
Then click the 'run_recipe' link and you'll get some instructions on how to repro the build.