Migrate coveralls badge to v2

endpoints/coveralls.ts

@@ -0,0 +1,51 @@
+import got from '../libs/got'
+import { coverage as cov, coverageColor } from '../libs/utils'
+import {
+  badgenServe,
+  BadgenServeMeta as Meta,
+  BadgenServeHandlers as Handlers,
+  BadgenServeHandlerArgs as Args
+} from '../libs/badgen-serve'
+
+export const meta: Meta = {
+  title: 'Coveralls',
+  examples: {
+    '/coveralls/c/github/jekyll/jekyll': 'coverage (github)',
+    '/coveralls/c/github/jekyll/jekyll/master': 'coverage (github, branch)',
+    '/coveralls/c/bitbucket/pyKLIP/pyklip': 'coverage (bitbucket)',
+    '/coveralls/c/bitbucket/pyKLIP/pyklip/master': 'coverage (bitbucket, branch)',
+  }
+}
+
+export const handlers: Handlers = {
+  '/coveralls/c/:vcs<github|bitbucket>/:owner/:repo/:branch?': handler
+}
+
+export default badgenServe(handlers)
+
+// Detect coveralls.io's badge redirection instead of using it's api
+// See https://github.com/badgen/badgen.net/issues/96
+async function handler ({ vcs, owner, repo, branch }: Args) {
+  const endpoint = `https://coveralls.io/repos/${vcs}/${owner}/${repo}/badge.svg`
+  const badgeURL = await got.head(endpoint, {
+    // @ts-ignore
+    json: false,
+    query: { branch },
+    followRedirect: false // Expecting 302 redirection to "coveralls_xxx.svg"
+  }).then(res => res.headers.location)
+
+  try {
+    const percentage = badgeURL.match(/_(\d+)\.svg/)[1]
+    return {
+      subject: 'coverage',
+      status: cov(percentage),
+      color: coverageColor(Number(percentage))
+    }
+  } catch (e) {
+    return {
+      subject: 'coverage',
+      status: 'invalid',
+      color: 'grey'
+    }
+  }
+}

libs/examples.ts

@@ -29,6 +29,7 @@ const liveBadgeExampleList = [
   'circleci',
   'appveyor',
   'codecov',
+  'coveralls',
   // quality & metrics
   // utilities
 ]