Updates README and constrains GH pages to master only

.github/workflows/deploy.yml

@@ -51,4 +51,5 @@ jobs:
           SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
         run: |  # GITHUB_REF will be refs/heads/master or refs/tags/N.M.L
           build-bin/configure_deploy &&
+          build-bin/git/login_git &&
           build-bin/deploy $(echo ${GITHUB_REF} | cut -d/ -f 3)

README.md

@@ -1,5 +1,9 @@
 # Zipkin API
 
+[![Gitter chat](http://img.shields.io/badge/gitter-join%20chat%20%E2%86%92-brightgreen.svg)](https://gitter.im/openzipkin/zipkin)
+[![Build Status](https://github.com/openzipkin/zipkin-api/workflows/test/badge.svg)](https://github.com/openzipkin/zipkin-api/actions?query=workflow%3Atest)
+[![Maven Central](https://img.shields.io/maven-central/v/io.zipkin.proto3/zipkin-proto3.svg)](https://search.maven.org/search?q=g:io.zipkin.proto3%20AND%20a:zipkin-proto3)
+
 Zipkin API includes service and model definitions used for
 Zipkin-compatible services.
 
@@ -16,3 +20,13 @@ IDL files are languagage agnostic, there are no compilation instructions needed
 * [/api/v2](./zipkin2-api.yaml) - Most recent and published [here](https://zipkin.io/zipkin-api/#/)
 
 Take a look at the [example repository](https://github.com/openzipkin/zipkin-api-example) for how to use this.
+
+## Artifacts
+The proto artifact published is `zipkin-proto3` under the group ID `io.zipkin.proto3`
+
+### Library Releases
+Releases are at [Sonatype](https://oss.sonatype.org/content/repositories/releases) and [Maven Central](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22io.zipkin.proto3%22)
+
+### Library Snapshots
+Snapshots are uploaded to [Sonatype](https://oss.sonatype.org/content/repositories/snapshots) after
+commits to master.

build-bin/deploy

@@ -5,6 +5,12 @@ set -ue
 # This script deploys a master or release version.
 #
 # See [README.md] for an explanation of this and how CI should use it.
+version=${1:-master}
 
+# deploy maven snapshot or release version
 build-bin/maven/maven_deploy
-build-bin/idl_to_gh_pages
+
+# update GH pages on commit
+if [ "${version}" = "master" ]; then
+  build-bin/idl_to_gh_pages
+fi