feat: docker build and tag from ci

.circleci/config.yml

@@ -16,6 +16,11 @@ aliases:
         paths:
           - ~/go/pkg/mod
           - ~/.cache/go-build/
+  only-version-tags: &only-version-tags
+    tags:
+      only: /^v[0-9].*/
+    branches:
+      ignore: /.*/
 
 default_environment: &default_environment
   SERVICE: circle-ci
@@ -53,6 +58,12 @@ executors:
       IPFS_REUSEPORT: false
       LIBP2P_ALLOW_WEAK_RSA_KEYS: 1
       E2E_IPFSD_TYPE: go
+  dockerizer: 
+    docker: 
+      - image: circleci/golang:1.14
+    environment:
+      IMAGE_NAME: ipfs/go-ipfs
+      WIP_IMAGE_TAG: wip
 
 jobs:
   gobuild:
@@ -295,8 +306,45 @@ jobs:
           key: v1-ipfs-webui-{{ checksum "~/ipfs/go-ipfs/ipfs-webui/package-lock.json" }}
           paths:
             - ~/ipfs/go-ipfs/ipfs-webui/node_modules
+  docker-build:
+    executor: dockerizer
+    steps:
+      - checkout
+      - setup_remote_docker:
+          version: "18.09.3"
+      - run:
+          name: Build Docker image
+          command: |
+            docker build -t $IMAGE_NAME:$WIP_IMAGE_TAG .
+      - run:
+          name: Archive Docker image
+          command: docker save -o go-ipfs-image.tar $IMAGE_NAME
+      - persist_to_workspace:
+          root: .
+          paths:
+            - ./go-ipfs-image.tar
+  docker-push:
+    executor: dockerizer
+    steps:
+      - checkout
+      - setup_remote_docker:
+          version: "18.09.3"
+      - attach_workspace:
+          at: /tmp/workspace
+      - run:
+          name: Load archived Docker image
+          command: docker load -i /tmp/workspace/go-ipfs-image.tar
+      - run:
+          name: Publish Docker Image to Docker Hub
+          command: |
+            echo "$DOCKERHUB_PASS" | docker login -u "$DOCKERHUB_USERNAME" --password-stdin
+            ./bin/push-docker-tags.sh $(date -u +%F) "$CIRCLE_SHA1" "$CIRCLE_BRANCH" "$CIRCLE_TAG"
+
 workflows:
   version: 2
+
+  # Runs for all branches, but not on tags
+  # see: https://circleci.com/docs/2.0/workflows/#executing-workflows-for-a-git-tag
   test:
     jobs:
     - gobuild
@@ -316,3 +364,35 @@ workflows:
     - ipfs-webui:
         requires:
           - build
+    - docker-build
+    - docker-push:
+        # Requires dockerhub credentials, from circleci context.
+        context: dockerhub
+        requires:
+          - docker-build
+          - golint
+          - gotest
+          - sharness
+          - interop
+          - go-ipfs-api
+          - go-ipfs-http-client
+          - ipfs-webui
+        filters:
+          branches:
+            only:
+              - master
+              - feat/stabilize-dht
+
+  # NOTE: CircleCI only builds tags if you explicitly filter for them. That
+  # also means tag-based jobs can only depend on other tag-based jobs, so we
+  # use a separate workflow because every job needs to be tagged together.
+  # see: https://circleci.com/docs/2.0/workflows/#executing-workflows-for-a-git-tag
+  docker-on-tag: 
+    jobs:
+      - docker-build:
+          filters: *only-version-tags 
+      - docker-push:
+          context: dockerhub
+          filters: *only-version-tags 
+          requires:
+            - docker-build

bin/push-docker-tags.sh

@@ -0,0 +1,77 @@
+#!/usr/bin/env bash
+
+# push-docker-tags.sh
+#
+# Run from ci to tag images based on the current branch or tag name. 
+# A bit like dockerhub autobuild config, but somewhere we can version control it.
+# 
+# The `docker-build` job in .circleci/config.yml builds the current commit
+# in docker and tags it as ipfs/go-ipfs:wip
+#
+# Then the `docker-publish` job runs this script to decide what tag, if any,
+# to publish to dockerhub.
+#
+# Usage:
+#   ./push-docker-tags.sh <build number> <git commit sha1> <git branch name> [git tag name] [dry run]
+#
+# Example:
+#   # dry run. pass a 5th arg to have it print what it would do rather than do it.
+#   ./push-docker-tags.sh $(date -u +%F) testingsha master "" dryrun
+#    
+#   # push tag for the master branch
+#   ./push-docker-tags.sh $(date -u +%F) testingsha master
+#
+#   # push tag for a release tag
+#   ./push-docker-tags.sh $(date -u +%F) testingsha release v0.5.0
+#
+#   # Serving suggestion in circle ci - https://circleci.com/docs/2.0/env-vars/#built-in-environment-variables
+#   ./push-docker-tags.sh $(date -u +%F) "$CIRCLE_SHA1" "$CIRCLE_BRANCH" "$CIRCLE_TAG"
+#
+set -euo pipefail
+
+if [[ $# -lt 3 ]] ; then
+  echo 'At least 3 args required. Pass 5 args for a dry run.'
+  echo 'Usage:'
+  echo './push-docker-tags.sh <build number> <git commit sha1> <git branch name> [git tag name] [dry run]'
+  exit 1
+fi
+
+BUILD_NUM=$1
+GIT_SHA1=$2
+GIT_SHA1_SHORT=$(echo "$GIT_SHA1" | cut -c 1-7)
+GIT_BRANCH=$3
+GIT_TAG=${4:-""}
+DRY_RUN=${5:-false}
+
+WIP_IMAGE_TAG=${WIP_IMAGE_TAG:-wip}
+IMAGE_NAME=${IMAGE_NAME:-ipfs/go-ipfs}
+
+pushTag () {
+  local IMAGE_TAG=$1
+  if [ "$DRY_RUN" != false ]; then
+    echo "DRY RUN! I would have tagged and pushed the following..."
+    echo docker tag "$IMAGE_NAME:$WIP_IMAGE_TAG" "$IMAGE_NAME:$IMAGE_TAG"
+    echo docker push "$IMAGE_NAME:$IMAGE_TAG"
+  else
+    echo "Tagging $IMAGE_NAME:$IMAGE_TAG and pushing to dockerhub"
+    docker tag "$IMAGE_NAME:$WIP_IMAGE_TAG" "$IMAGE_NAME:$IMAGE_TAG"
+    docker push "$IMAGE_NAME:$IMAGE_TAG"
+  fi
+}
+
+if [[ $GIT_TAG =~ ^v[0-9]+ ]]; then
+  pushTag "$GIT_TAG"
+  pushTag "latest"
+
+elif [ "$GIT_BRANCH" = "feat/stabilize-dht" ]; then
+  pushTag "bifrost-${BUILD_NUM}-${GIT_SHA1_SHORT}"
+  pushTag "bifrost-latest"
+
+elif [ "$GIT_BRANCH" = "master" ]; then
+  pushTag "master-${BUILD_NUM}-${GIT_SHA1_SHORT}"
+  pushTag "master-latest"
+
+else
+  echo "Nothing to do. No docker tag defined for branch: $GIT_BRANCH, tag: $GIT_TAG"
+
+fi