'a' and 'w' are mutually exclusive and just 'a' is what we actually
want. Linux doesn't care (it just takes the first one) but Windows
throws a ValueError.
R=machenbach@chromium.org
BUG=None
Review-Url: https://codereview.chromium.org/2467363002
Cr-Commit-Position: refs/heads/master@{#40711}
This prepares using mb as a library and not as a sub
process. It is used like that in the new list command that
shows available configurations.
Also added more robust checks of user inputs, better hints
and better docu.
BUG=chromium:625791
NOTRY=true
Review-Url: https://codereview.chromium.org/2300333002
Cr-Commit-Position: refs/heads/master@{#39136}
Helper script to generate gn arguments based on common
developer defaults or builder configurations.
BUG=chromium:625791
NOTRY=true
Review-Url: https://codereview.chromium.org/2138693002
Cr-Commit-Position: refs/heads/master@{#37947}
