changelog for v26

Author: jtarchie

CHANGELOG.md

@@ -1,3 +1,7 @@
+# v26 @ 8/21/2017
+
+* Support evaluating the concourse BUILD environment variables in a context.
+
 # v25 @ 8/1/2017
 
 * support caching of API requests to Github. This decreases hitting the

README.md

@@ -141,6 +141,9 @@ Set the status message for `concourse-ci` context on specified pull request.
   (defaults to `status`). Any context will be prepended with `concourse-ci`, so
   a context of `unit-tests` will appear as `concourse-ci/unit-tests` on Github.
 
+  This supports the [build environment](http://concourse.ci/implementing-resources.html#resource-metadata)
+  variables provided by concourse. For example, `context: $BUILD_JOB_NAME` will set the context to the job name.
+
 * `comment`: *Optional.* The file path of the comment message. Comment owner is same with the owner of `access_token`. 
 
 * `merge.method`: *Optional.* Use this to merge the PR into the target branch of the PR. There are three available merge methods -- `merge`, `squash`, or `rebase`. Please this [doc](https://developer.github.com/changes/2016-09-26-pull-request-merge-api-update/) for more information.