commit 3f7ceb4e26566b85626ce17f5260528c6a994d26
author Todd Wang <toddw@google.com> Mon May 04 17:51:34 2015 -0700
committer Todd Wang <toddw@google.com> Mon May 04 17:51:34 2015 -0700
tree e4cc0b42ea8cdfdcb0379f0d0e001bd8a6b08d5d
parent 98d5aff13c255ba6af0a25bfff848cb7e916de2c

ref: Add -v23.metadata, which dumps metadata for the binary.

The metadata package is a map from string ids to string values,
and provides a mechanism to set the ldflags on the go toolchain
to get metadata linked into your binary during build time.  It
also provides utilities to insert more metadata in package init
functions, and to convert into XML and base64.

Every binary built with the metadata package will now
automatically get a flag -v23.metadata, which dumps the metadata
for the program binary in XML.

The format looks like this:

<metadata>
<md id="build.Manifest"><![CDATA[
<manifest label="">
<imports></imports>
<projects>
<project exclude="false" name="release.go.v23"...
...
</projects>
<tools></tools>
</manifest>
]]></md>
<md id="build.Platform">amd64unknown-linux-unknown</md>
<md id="build.Pristine">false</md>
<md id="build.Time">2015-05-04T08:40:22Z</md>
<md id="build.User">Todd Wang</md>
<md id="go.Arch">amd64</md>
<md id="go.OS">linux</md>
<md id="go.Version">go1.4.1</md>
<md id="v23.RPCEndpointVersion">5</md>
<md id="v23.RPCVersionMax">10</md>
<md id="v23.RPCVersionMin">9</md>
</metadata>

This addresses one part of vanadium/issues#407

MultiPart: 3/3

Change-Id: I33b45fb9d3d79c4aaa92b1ab3af8d0c6a65d736c