Guard against errors during the deploy step, and install rsync (#277)

.circleci/config.yml

@@ -63,6 +63,9 @@ jobs:
               git config --global user.name "Website Deployment Script"
               echo "machine github.com login facebook-github-bot" > ~/.netrc
             fi
+      - run:
+          name: Install Dependencies
+          command: sudo apt install rsync
       - run:
           name: Deploy Website
           command: |

lib/publish-gh-pages.js

@@ -118,9 +118,14 @@ excludePath = `${PROJECT_NAME}-${DEPLOYMENT_BRANCH}`;
 // cannot use shell.cp because it doesn't support copying dotfiles and we
 // need to copy directories like .circleci, for example
 // https://github.com/shelljs/shelljs/issues/79
-shell.exec(
-  `rsync -rt --exclude=${excludePath} --exclude=.DS_Store ${fromPath} ${toPath}`
-);
+if (
+  shell.exec(
+    `rsync -rt --exclude=${excludePath} --exclude=.DS_Store ${fromPath} ${toPath}`
+  ).code !== 0
+) {
+  shell.echo(`Error: Copying build assets failed`);
+  shell.exit(1);
+}
 
 shell.cd(path.join('build', `${PROJECT_NAME}-${DEPLOYMENT_BRANCH}`));
 
@@ -128,11 +133,16 @@ const currentCommit = shell.exec('git rev-parse HEAD').stdout.trim();
 
 shell.exec('git add --all');
 
-shell.exec(
-  `git commit -m "Deploy website" -m "Deploy website version based on ${
-    currentCommit
-  }"`
-);
+if (
+  shell.exec(
+    `git commit -m "Deploy website" -m "Deploy website version based on ${
+      currentCommit
+    }"`
+  ).code !== 0
+) {
+  shell.echo(`Error: Committing static website failed`);
+  shell.exit(1);
+}
 if (shell.exec(`git push origin ${DEPLOYMENT_BRANCH}`).code !== 0) {
   shell.echo('Error: Git push failed');
   shell.exit(1);