From e4980a1c4d496c043fb818691b5724b5c1ee63d4 Mon Sep 17 00:00:00 2001
From: Martijn Vegter <martijn@martijnvegter.com>
Date: Sat, 16 Nov 2019 13:33:09 +0100
Subject: [PATCH] If base is changed trigger update all

---
 index.js          | 88 +++++++++++++++++++++++++++++++++++++++++++++--
 package-lock.json |  6 ++--
 package.json      |  4 +--
 3 files changed, 91 insertions(+), 7 deletions(-)

diff --git a/index.js b/index.js
index b30cb4eff7..8115c96179 100644
--- a/index.js
+++ b/index.js
@@ -1,9 +1,91 @@
+const yaml = require('js-yaml')
+const merge = require('deepmerge')
 const mergeArrayByName = require('./lib/mergeArrayByName')
 
 module.exports = (robot, _, Settings = require('./lib/settings')) => {
+  async function onPush (context) {
+    const config = await context.config('settings.yml', {}, { arrayMerge: mergeArrayByName })
+    Settings.sync(context.github, context.repo(), config)
+  }
+
+  async function listRepos (github, { login, type }) {
+    var listForOrg
+    if (type.toLowerCase() === 'organization') {
+      listForOrg = github.paginate(
+        github.repos.listForOrg.endpoint.merge({
+          org: login
+        })
+      )
+    } else {
+      listForOrg = github.paginate(
+        github.repos.listForUser.endpoint.merge({
+          username: login
+        })
+      )
+    }
+
+    return listForOrg
+  }
+
+  async function loadYaml (github, params) {
+    try {
+      const response = await github.repos.getContents(params)
+
+      // Ignore in case path is a folder
+      // - https://developer.github.com/v3/repos/contents/#response-if-content-is-a-directory
+      if (Array.isArray(response.data)) {
+        return null
+      }
+
+      // we don't handle symlinks or submodule
+      // - https://developer.github.com/v3/repos/contents/#response-if-content-is-a-symlink
+      // - https://developer.github.com/v3/repos/contents/#response-if-content-is-a-submodule
+      if (typeof response.data.content !== 'string') {
+        return
+      }
+
+      return yaml.safeLoad(Buffer.from(response.data.content, 'base64').toString()) || {}
+    } catch (e) {
+      if (e.status === 404) {
+        return null
+      }
+
+      throw e
+    }
+  }
+
+  async function triggerRepositoryUpdate (context, baseConfig, { owner, repo }) {
+    const { github } = context
+
+    const config = await loadYaml(github, {
+      owner,
+      repo,
+      path: Settings.FILE_NAME
+    })
+
+    if (config === null) {
+      robot.log.debug(`File '${Settings.FILE_NAME}' not found in '${owner}/${repo}', returning...`)
+      return
+    }
+
+    return Settings.sync(context.github, { owner, repo }, merge(baseConfig, config))
+  }
+
+  async function onPushTemplate (context) {
+    const { github, payload } = context
+    const { login, type } = payload.repository.owner
+
+    const baseConfig = await context.config('settings.yml', {}, { arrayMerge: mergeArrayByName })
+    const repositories = await listRepos(github, { login, type })
+    await repositories.filter(repo => repo.name !== '.github').map(async (repo) => {
+      triggerRepositoryUpdate(context, baseConfig, { owner: login, repo: repo.name })
+    })
+  }
+
   robot.on('push', async context => {
     const { payload } = context
     const { repository } = payload
+    const { name: repositoryName } = repository
 
     const defaultBranch = payload.ref === 'refs/heads/' + repository.default_branch
     if (!defaultBranch) {
@@ -21,7 +103,9 @@ module.exports = (robot, _, Settings = require('./lib/settings')) => {
       return
     }
 
-    const config = await context.config('settings.yml', {}, { arrayMerge: mergeArrayByName })
-    return Settings.sync(context.github, context.repo(), config)
+    await onPush(context)
+    if (repositoryName === '.github') {
+      await onPushTemplate(context)
+    }
   })
 }
diff --git a/package-lock.json b/package-lock.json
index 15ee99c61f..74d2469d63 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1619,9 +1619,9 @@
       "dev": true
     },
     "deepmerge": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-4.1.0.tgz",
-      "integrity": "sha512-tJlmKE535XRVBrzMRMqlm4V2S/l3yO/qr9Ad0MUqgR5jh9epGrALs8Q6+pROMa6ntDieAlnmYM/cDFCtNjp4+Q=="
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-4.2.2.tgz",
+      "integrity": "sha512-FJ3UgI4gIl+PHZm53knsuSFpE+nESMr7M4v9QcgB7S63Kj/6WqMiFQJpBBYz1Pt+66bZpP3Q7Lye0Oo9MPKEdg=="
     },
     "define-properties": {
       "version": "1.1.3",
diff --git a/package.json b/package.json
index 3df7de9ed2..f8b092e292 100644
--- a/package.json
+++ b/package.json
@@ -12,8 +12,8 @@
   "author": "Brandon Keepers",
   "license": "ISC",
   "dependencies": {
-    "deepmerge": "^4.1.0",
-    "js-yaml": "^3.12.0",
+    "deepmerge": "^4.2.2",
+    "js-yaml": "^3.13.1",
     "probot": "^9.5.0"
   },
   "devDependencies": {