From 55ce0d9d1782257968c825b936c44084dcc140aa Mon Sep 17 00:00:00 2001
From: Fabio Berger <me@fabioberger.com>
Date: Fri, 11 Jan 2019 16:50:41 +0100
Subject: Add pre-publish check to ensure publisher is logged in to docker
 cmdline

---
 packages/monorepo-scripts/src/prepublish_checks.ts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/packages/monorepo-scripts/src/prepublish_checks.ts b/packages/monorepo-scripts/src/prepublish_checks.ts
index 82eaf5cf9..61ac76823 100644
--- a/packages/monorepo-scripts/src/prepublish_checks.ts
+++ b/packages/monorepo-scripts/src/prepublish_checks.ts
@@ -17,6 +17,18 @@ async function prepublishChecksAsync(): Promise<void> {
     await checkChangelogFormatAsync(updatedPublicPackages);
     await checkGitTagsForNextVersionAndDeleteIfExistAsync(updatedPublicPackages);
     await checkPublishRequiredSetupAsync();
+    await checkDockerHubSetupAsync();
+}
+
+async function checkDockerHubSetupAsync(): Promise<void> {
+    try {
+        utils.log('Checking that the user is logged in to docker command...');
+        await execAsync(`echo "$DOCKER_PASS" | docker login -u $DOCKER_USERNAME --password-stdin`);
+    } catch (err) {
+        throw new Error(
+            'Failed to log you into the `docker` commandline tool. Make sure you have environment variables `DOCKER_USERNAME` and `DOCKER_PASS` set.',
+        );
+    }
 }
 
 async function checkGitTagsForNextVersionAndDeleteIfExistAsync(updatedPublicPackages: Package[]): Promise<void> {
-- 
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