CI docker (strapdata#6)

(cherry picked from commit 251b8c5)

Author: DBarthe

.gitignore

@@ -44,3 +44,5 @@ html_docs
 /tmp/
 eclipse-build
 /private/
+
+docker

.travis.yml

@@ -1,5 +1,10 @@
 dist: trusty
 sudo: required
+env:
+  global:
+    # this variable determine when docker images are tagged 'latest'
+    - LATEST_VERSION=6.2.3
+
 language: 
   - java
   - bash
@@ -71,6 +76,6 @@ deploy:
 
   - provider: script
     skip_cleanup: true
-    script: bash docker/build.sh
+    script: bash ./docker-ci.sh
     on:
       tags: true

docker-ci.sh

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+
+# fails on error and trace execution
+set -ex
+
+# shallow clone of the elassandra docker repository
+rm -rf docker
+git clone --depth 1 https://github.com/strapdata/docker-elassandra.git docker
+cd docker
+
+# set parameters
+if [ "$TRAVIS" = "true" ]; then
+  # Special branching to be ran under travis
+
+  export REPO_NAME=${TRAVIS_REPO_SLUG}
+  export REPO_DIR=${TRAVIS_BUILD_DIR}
+
+  if [ -n "$TRAVIS_TAG" ]; then
+    # publish to docker hub when a tag is set
+    export DOCKER_PUBLISH=true
+
+    # try to infer if the current build need to be tagged "latest"
+    ELASTICSEARCH_VERSION=$(echo "$TRAVIS_TAG" | sed 's/v\(.*\..*.\..*\)\..*/\1/')
+    if [ "$ELASTICSEARCH_VERSION" = "$LATEST_VERSION" ]; then
+      export DOCKER_LATEST=true
+    fi
+  fi
+
+else
+  export REPO_DIR=../
+fi
+
+# try 5 times, because gpg servers suck
+n=0
+until [ $n -ge 5 ]
+do
+  echo "build try number $n"
+  # build and publish the docker image
+  ./build.sh && break
+  n=$[$n+1]
+  sleep 1
+done
+if [ $n -eq 5 ]; then
+  echo "failed to build image"
+  exit 1
+fi
+
+
+# clean up
+cd ../
+rm -rf docker