chore: run docker rc release separately (#3342)

When we publish an rc to npm, sometimes the release isn't available
by the time we try to publish an rc to docker hub.

Change the docker publish to be a separate job to give it a bit of
time before running so npm has a chance to propagate the rc but also
so we can re-run if it's too fast.

Author: achingbrain

.travis.yml

@@ -11,6 +11,7 @@ branches:
 stages:
   - test
   - release-rc
+  - release-docker
   - test-external
 
 node_js:
@@ -252,6 +253,19 @@ jobs:
         # only run if the last commit was not part of a release
         - if [[ ! `git log -n 1 -q` =~ publish ]]; then npm run release:rc ; fi
 
+    - stage: release-docker
+      # only run on changes to master
+      if: branch = master AND type = push AND fork = false
+      name: release docker
+      script:
+        # travis does not fetch the whole repo history, but we need that to work out the
+        # ref count to publish canary releases properly
+        - git fetch --unshallow
+        - echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > .npmrc
+        - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
+        # only run if the last commit was not part of a release
+        - if [[ ! `git log -n 1 -q` =~ publish ]]; then npm run docker:rc ; fi
+
     - stage: test-external
       # only run on changes to master
       if: branch = master AND type = push AND fork = false

package.json

@@ -44,8 +44,9 @@
     "release:post:remove-hoisted-modules": "json -I -f ./lerna.json -e \"delete this.command.bootstrap.nohoist\"",
     "release:post:remove-examples": "json -I -f ./lerna.json -e \"this.packages = this.packages.filter(p => !p.includes('examples'))\"",
     "release:post:revert-ignore-changes-to-lerna-config": "git update-index --no-assume-unchanged ./lerna.json",
-    "release:rc": "run-s release:pre:* release:canary docker:rc:* release:post:*",
+    "release:rc": "run-s release:pre:* release:canary release:post:*",
     "release:canary": "lerna publish --canary --preid rc --dist-tag next --force-publish --yes",
+    "docker:rc": "run-s docker:rc:*",
     "docker:rc:build": "docker build . --no-cache --tag js-ipfs:next --file ./Dockerfile.next",
     "docker:rc:tag-next": "docker tag js-ipfs:next docker.io/ipfs/js-ipfs:next",
     "docker:rc:tag-rc": "docker tag js-ipfs:next docker.io/ipfs/js-ipfs:v`npm show ipfs@next version -q`",