tree 6106185c20c93194ebb286dda2f8d036a5c8e7d0
parent b258a532fdb86d080b7cf3d08709283cd1d8bf16
author Todd Wang <toddw@google.com> 1431670195 -0700
committer Todd Wang <toddw@google.com> 1431670198 -0700

lib: Add support for cmdline.Env.Vars

This adds envrionment variable support to cmdline.Env, and also
updates some programs to use this support.  The main benefit of
using cmdline.Env.Vars is that it makes testing easier, since you
can just pass in your own map.

We represent environment variables as map[string]string, which is
a nice simple form for lookups and mutations.  Originally I was
planning on using *envvar.Vars, but the delta-tracking support is
probably unnecessary, and the native Go map syntax is nicer.

A subsequent change will update the v23.Init and test.InitForTest
mechanisms to support explicit passing of args and envvars, and
will take advantage of this support.

MultiPart: 1/2
Change-Id: I6044cf72a54254d9abd585908a1b712847b97913