Reconfigures travis CI to push new book to docs directory

Author: garrettgman

.travis.yml

@@ -1,9 +1,11 @@
 language: r
-
 sudo: false
+cache: packages
 
-cache:
-  packages: true
+before_script:
+  - chmod +x ./_build.sh
+  - chmod +x ./_deploy.sh
 
 script:
-  - Rscript -e 'bookdown::render_book("index.rmd")'
+  - ./_build.sh
+  - ./_deploy.sh

_build.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -ev
+
+Rscript -e 'bookdown::render_book("index.rmd")'

_deploy.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+set -e
+
+[ -z "${GITHUB_PAT}" ] && exit 0
+[ "${TRAVIS_BRANCH}" != "master" ] && exit 0
+
+git config --global user.email "[email protected]"
+git config --global user.name "Garrett Grolemund"
+
+git clone https://${GITHUB_PAT}@github.com/${TRAVIS_REPO_SLUG}.git book-output
+cd book-output/docs/
+git rm -rf *
+cp -r ../../docs/* ./
+git add --all *
+git commit -m"Update the book" || true
+git push -q origin gh-pages