#!/bin/sh
################################################################################
# Title : generateDocumentationAndDeploy.sh
# Date created : 2016/02/22
# Notes :
# __AUTHOR__="Konrad Werys"
# Preconditions:
# - Packages doxygen doxygen-doc doxygen-latex doxygen-gui graphviz
# must be installed.
# - Doxygen configuration file must have the destination directory empty and
# source code directory with a $(TRAVIS_BUILD_DIR) prefix.
# - An gh-pages branch should already exist. See below for mor info on hoe to
# create a gh-pages branch.
#
# Required global variables:
# - TRAVIS_BUILD_NUMBER : The number of the current build.
# - TRAVIS_COMMIT : The commit that the current build is testing.
# - DOXYFILE : The Doxygen configuration file.
# - GH_REPO_NAME : The name of the repository.
# - GH_REPO_REF : The GitHub reference to the repository.
# - GH_REPO_TOKEN : Secure token to the github repository.
#
# For information on how to encrypt variables for Travis CI please go to
# https://docs.travis-ci.com/user/environment-variables/#Encrypted-Variables
# or https://gist.github.com/vidavidorra/7ed6166a46c537d3cbd2
# For information on how to create a clean gh-pages branch from the master
# branch, please go to https://gist.github.com/vidavidorra/846a2fc7dd51f4fe56a0
#
# This script will generate Doxygen documentation and push the documentation to
# the gh-pages branch of a repository specified by GH_REPO_REF.
# Before this script is used there should already be a gh-pages branch in the
# repository.
#
################################################################################
################################################################################
##### Setup this script and get the current gh-pages branch. #####
echo 'Setting up the script...'
# Exit with nonzero exit code if anything fails
set -e
# Create a clean working directory for this script.
cd $TRAVIS_BUILD_DIR
mkdir code_docs
cd code_docs
# Get the current gh-pages branch
git clone -b gh-pages https://git@$GH_REPO_REF
cd $GH_REPO_NAME
##### Configure git.
# Set the push default to simple i.e. push only the current branch.
git config --global push.default simple
# Pretend to be an user called Travis CI.
git config user.name "Travis CI"
git config user.email "travis@travis-ci.org"
# Remove everything currently in the gh-pages branch.
# GitHub is smart enough to know which files have changed and which files have
# stayed the same and will only update the changed files. So the gh-pages branch
# can be safely cleaned, and it is sure that everything pushed later is the new
# documentation.
rm -rf *
# Need to create a .nojekyll file to allow filenames starting with an underscore
# to be seen on the gh-pages site. Therefore creating an empty .nojekyll file.
# Presumably this is only needed when the SHORT_NAMES option in Doxygen is set
# to NO, which it is by default. So creating the file just in case.
echo "" > .nojekyll
################################################################################
##### Generate the Doxygen code documentation and log the output. #####
echo 'Generating Doxygen code documentation...'
# Redirect both stderr and stdout to the log file AND the console.
pwd
cd $TRAVIS_BUILD_DIR
pwd
doxygen $DOXYFILE 2>&1 | tee doxygen.log
pwd
cd $OUTPUT_FOR_DOXY
pwd
################################################################################
##### Upload the documentation to the gh-pages branch of the repository. #####
# Only upload if Doxygen successfully created the documentation.
# Check this by verifying that the html directory and the file html/index.html
# both exist. This is a good indication that Doxygen did it's work.
if [ -d "html" ] && [ -f "html/index.html" ]; then
pwd
echo 'Uploading documentation to the gh-pages branch...'
# Add everything in this directory (the Doxygen code documentation) to the
# gh-pages branch.
# GitHub is smart enough to know which files have changed and which files have
# stayed the same and will only update the changed files.
git add --all
# Commit the added files with a title and description containing the Travis CI
# build number and the GitHub commit reference that issued this build.
git commit -m "Deploy code docs to GitHub Pages Travis build: ${TRAVIS_BUILD_NUMBER}" -m "Commit: ${TRAVIS_COMMIT}"
# Force push to the remote gh-pages branch.
# The ouput is redirected to /dev/null to hide any sensitive credential data
# that might otherwise be exposed.
git push --force "https://${GH_REPO_TOKEN}@${GH_REPO_REF}" > /dev/null 2>&1
else
echo '' >&2
echo 'Warning: No documentation (html) files have been found!' >&2
echo 'Warning: Not going to push the documentation to GitHub!' >&2
exit 1
fi