.travis.yml

sudo: required
services:
  - docker
addons:
   apt:
     sources:
       - git-core
     packages:
       - git
language: java
jdk:
  - openjdk8
stages:
- docker build
jobs:
  include:
  - stage: docker build
    services:
    - docker
    install:
    - true
    script:
    - BRANCH=${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH}
    - '[ $(git log --format=%B  $TRAVIS_COMMIT_RANGE | grep -i "#doc" | wc -l) -gt 0 ] && FORCE_DOC_GEN=0 || FORCE_DOC_GEN=1'
    - MODIFIED_DOCS=$(git diff --name-only $TRAVIS_COMMIT_RANGE | grep -E '.*.adoc$' | wc -l)
    - '[ $MODIFIED_DOCS -ge 1 ] && GENERATE_DOC=0 || GENERATE_DOC=1'
    - 'if [ $FORCE_DOC_GEN == 0 ] || [ $GENERATE_DOC == 0 ]; then
        git config user.name "Travis CI";
        git config user.email "travis@travis.ibm.com";
        git config remote.origin.fetch +refs/heads/*:refs/remotes/origin/*;
        git fetch origin gh-pages;
        git worktree add -b gh-pages gh-pages origin/gh-pages;
        git remote add origin-pages https://${GH_USER}:${GH_TOKEN}@${GH_URL}/${GH_ORG}/${GH_REPO}.git > /dev/null 2>&1;
        docker pull antora/antora:1.1.1;
        docker run -v $TRAVIS_BUILD_DIR:/antora --rm -t antora/antora:1.1.1 --pull --stacktrace site.yml;
        cd gh-pages;
        sudo touch .nojekyll;
        git add .;
        git commit -m "Travis build: $TRAVIS_BUILD_NUMBER Documentation Updated";
        git fetch;
        git push --quiet --set-upstream origin-pages gh-pages;
      fi'