run

#!/usr/bin/env bash

# unofficial "strict mode": http://redsymbol.net/articles/unofficial-bash-strict-mode/
set -euo pipefail
IFS=$'\n\t'


BUILD_DIR="/tmp/algo-book-build"
SITE_ROOT=${SITE_ROOT-"/"}
REPO="github.com/Bradfield/algos.git"
PORT=${PORT-"5000"}


function test {
  log-msg 'Running Python tests of code samples'
  python -m unittest discover -p "*_test.py"
  log-msg 'Running JavaScript code samples to check for failing asserts'
  for file in book/**/*.js; do
    { echo 'var assert = require("assert");'; cat $file; } | node --use_strict
  done
  log-msg 'Running JavaScript tests of book building code'
  for file in *.js; do
    TEST=1 node $file
  done
}


function publish-from-travis {
  if [ "$TRAVIS_PULL_REQUEST" == "false" ] && [ "$TRAVIS_BRANCH" == "master" ]; then
    build-book && publish-book
  fi
}

function serve {
  mkdir -p $BUILD_DIR
  cd $BUILD_DIR && http-server -p $PORT
}

# run in dev mode
function dev {
  log-msg 'Building'
  build-book
  log-msg 'Starting server and browser'
  ( serve ) &
  ( sleep 0.5 && open -a "Google Chrome" "http://localhost:${PORT}" ) &
  log-msg 'Watching for changes'
  wach './run build-book && rld chrome'
  wait
}

# build book to a temporary direcotry
function build-book {
  log-msg "Clearing contents of ${BUILD_DIR}"
  mkdir -p $BUILD_DIR
  rm -rf $BUILD_DIR/**/*
  log-msg "Building book"
  BUILD_DESTINATION=$BUILD_DIR SITE_ROOT=$SITE_ROOT node build.js
}

# publish a built book by commiting and force pushing it to gh-pages
function publish-book {
  cd $BUILD_DIR
  git init
  git config user.name "Travis CI"
  git config user.email "travis@travis-ci.org"
  git add .
  git commit -m "Deploying to Github Pages" > /dev/null
  log-msg "Publishing to github pages"
  git push --force --quiet "https://${GITHUB_TOKEN}@${REPO}" master:gh-pages > /dev/null
}

# ---

# print a prefixed log message
function log-msg {
  echo '-*' "$1"
}

# ---

# add executables for local node modules to path
function realpath {
  python -c 'import os,sys; print os.path.realpath(sys.argv[1])' "$1"
}
PATH=$(realpath "$(dirname "$BASH_SOURCE")")/node_modules/.bin:$PATH

# ---

# if called with interpreter, run fn that matches first arg
[[ $BASH_SOURCE = "$0" ]] && {
  # show help if no sub-command provided
  [[ $# -eq 0 ]] && { help; exit; }
  # otherwise invoke the fun
  eval "$1" "${@:2}"
}