auto-detect default branch on [github nycrc osslifecycle] (#5234)

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

services/github/github-commits-since.service.js

@@ -164,7 +164,7 @@ module.exports = class GithubCommitsSince extends GithubAuthV3Service {
       : 'repo or version not found'
     const { ahead_by: commitCount } = await this._requestJson({
       schema,
-      url: `/repos/${user}/${repo}/compare/${version}...${branch || 'master'}`,
+      url: `/repos/${user}/${repo}/compare/${version}...${branch || 'HEAD'}`,
       errorMessages: errorMessagesFor(notFoundMessage),
     })
 

services/github/github-common-fetch.js

@@ -26,7 +26,7 @@ const contentSchema = Joi.object({
 
 async function fetchRepoContent(
   serviceInstance,
-  { user, repo, branch = 'master', filename }
+  { user, repo, branch = 'HEAD', filename }
 ) {
   const errorMessages = errorMessagesFor(
     `repo not found, branch not found, or ${filename} missing`

services/github/github-package-json.service.js

@@ -166,7 +166,7 @@ class GithubPackageJsonDependencyVersion extends ConditionalGithubAuthV3Service
   }
 
   async handle(
-    { user, repo, kind, branch = 'master', scope, packageName },
+    { user, repo, kind, branch = 'HEAD', scope, packageName },
     { filename = 'package.json' }
   ) {
     const {

services/nycrc/nycrc.service.js

@@ -114,7 +114,7 @@ module.exports = class Nycrc extends ConditionalGithubAuthV3Service {
         schema: pkgJSONSchema,
         user,
         repo,
-        branch: 'master',
+        branch: 'HEAD',
         filename: config,
       })
       const nycConfig = pkgJson.c8 || pkgJson.nyc
@@ -131,7 +131,7 @@ module.exports = class Nycrc extends ConditionalGithubAuthV3Service {
           schema: nycrcSchema,
           user,
           repo,
-          branch: 'master',
+          branch: 'HEAD',
           filename: config,
         }),
         preferredThreshold

services/nycrc/nycrc.tester.js

@@ -26,7 +26,7 @@ t.create('.nycrc in monorepo')
   .get('/yargs/yargs.json?config=packages/foo/.nycrc.json')
   .intercept(nock =>
     nock('https://api.github.com')
-      .get('/repos/yargs/yargs/contents/packages/foo/.nycrc.json?ref=master')
+      .get('/repos/yargs/yargs/contents/packages/foo/.nycrc.json?ref=HEAD')
       .reply(200, {
         content: Buffer.from(
           JSON.stringify({
@@ -42,7 +42,7 @@ t.create('.nycrc with no thresholds')
   .get('/yargs/yargs.json?config=.nycrc')
   .intercept(nock =>
     nock('https://api.github.com')
-      .get('/repos/yargs/yargs/contents/.nycrc?ref=master')
+      .get('/repos/yargs/yargs/contents/.nycrc?ref=HEAD')
       .reply(200, {
         content: Buffer.from(
           JSON.stringify({
@@ -61,7 +61,7 @@ t.create('package.json with nyc stanza')
   .get('/yargs/yargs.json?config=package.json')
   .intercept(nock =>
     nock('https://api.github.com')
-      .get('/repos/yargs/yargs/contents/package.json?ref=master')
+      .get('/repos/yargs/yargs/contents/package.json?ref=HEAD')
       .reply(200, {
         content: Buffer.from(
           JSON.stringify({
@@ -79,7 +79,7 @@ t.create('package.json with nyc stanza, but no thresholds')
   .get('/yargs/yargs.json?config=package.json')
   .intercept(nock =>
     nock('https://api.github.com')
-      .get('/repos/yargs/yargs/contents/package.json?ref=master')
+      .get('/repos/yargs/yargs/contents/package.json?ref=HEAD')
       .reply(200, {
         content: Buffer.from(
           JSON.stringify({

services/osslifecycle/osslifecycle.service.js

@@ -93,7 +93,7 @@ module.exports = class OssTracker extends BaseService {
     const { buffer } = await this.fetch({
       user,
       repo,
-      branch: branch || 'master',
+      branch: branch || 'HEAD',
     })
     try {
       const status = buffer.match(/osslifecycle=([a-z]+)/im)[1]

services/osslifecycle/osslifecycle.tester.js

@@ -47,7 +47,7 @@ t.create('oss metadata in unexpected format')
   .intercept(
     nock =>
       nock('https://raw.githubusercontent.com')
-        .get('/some-user/some-project/master/OSSMETADATA')
+        .get('/some-user/some-project/HEAD/OSSMETADATA')
         .reply(200, `wrongkey=active`),
     {
       'Content-Type': 'text/plain;charset=UTF-8',