Simple Github API client using Groovy RESTClient

GithubClient.groovy

/**
 *   Simple Github API client that supports basic auth.
 */
class GithubClient {
    String username
    String password
    String owner
    String repository

    String fetchFileContents(String filePath) {
        request("${repoUrl}contents/${filePath}").content.decodeBase64()
    }

    public Map request(String url) {
        githubApi.get(path : url).responseData
    }

    private String getRepoUrl() {
        "repos/${owner}/${repository}/"
    }

    private RESTClient getGithubApi() {
        return new RESTClient("https://api.github.com/").with {
            headers.'User-Agent' = 'Mozilla/5.0'

            if (username && password) {
                headers['Authorization'] = 'Basic '+"${username}:${password}".getBytes('iso-8859-1').encodeBase64()
            }

            it
        }
    }
}

You might also consider using the new Personal API Tokens so you don't have to embed your username and password: https://github.com/blog/1509-personal-api-tokens

Here's the script that I use to generate weekly summary emails of Github issues: https://gist.github.com/joshareed/5706061