Add repomod for changing docker base image (#17)

repomods/docker-base-image.js

@@ -0,0 +1,59 @@
+const fs = require('fs');
+const shelljs = require('shelljs');
+
+const checkoutBranch = require('./../src/utils/branch/checkoutBranch.js');
+const fastForwardBranch = require('./../src/utils/branch/fastForwardBranch.js');
+const validateBranchWithUpstream = require('./../src/utils/branch/validateBranchWithUpstream');
+const deleteBranch = require('./../src/utils/branch/deleteBranch.js');
+const makeBranch = require('./../src/utils/branch/makeBranch.js');
+const makePullRequest = require('./../src/utils/makePullRequest.js');
+const pause = require('./../src/utils/pause.js');
+const withEachRepo = require('./../src/utils/withEachRepo.js');
+
+const BASE_IMAGE = 'FROM uber/web-base-image:1.0.0';
+
+const repoParentFolder = process.cwd() + '/../';
+const originBranch = 'orchestrate-docker-base-image';
+const commitTitle = `Use web base docker image`;
+
+withEachRepo(async (api, repo) => {
+  checkoutBranch(repo, 'master');
+  fastForwardBranch(repo, 'master');
+  validateBranchWithUpstream(repo, 'master');
+  deleteBranch(api, repo, originBranch);
+  makeBranch(repo, originBranch);
+
+  const repoFolder = `${repoParentFolder}${repo.name}`;
+
+  // Remove unused XVFB files
+  try {
+    fs.unlinkSync(`${repoFolder}/.buildkite/xvfb_daemon_run`);
+    fs.unlinkSync(`${repoFolder}/.buildkite/xvfb_init`);
+  } catch (e) {
+    console.log(e);
+  }
+
+  // Get Docker content
+  let dockerContent = fs.readFileSync(`${repoFolder}/Dockerfile`, 'utf8');
+
+  // Update base image
+  dockerContent = dockerContent.replace(/FROM\s+node.*/, BASE_IMAGE);
+
+  // Write pipeline yml
+  fs.writeFileSync(`${repoFolder}/Dockerfile`, dockerContent, 'utf8');
+
+  // Commit changes & push
+  shelljs.exec(`
+    cd ${repoFolder} &&
+    git commit -a -m "${commitTitle}" &&
+    git push origin ${originBranch}
+  `);
+
+  // Open pull request
+  await makePullRequest(api, repo, {
+    title: commitTitle,
+    originBranch,
+  });
+
+  await pause(200);
+});