build

#!/usr/bin/env sh

DESCRIPTION="
Wren 0.4 -- build script for Wren, a Jekyll theme

Description:
  Attempts to builds the Jekyll site in the working directory
  and then checks whether that build was successful.

Usage:
  build [options]

Options:
  --clean)   Removes site output without building
  --drafts)  Build the site with drafts and serve it locally
  --help)    Show this message
  --test)    Build the site and clean up afterwards
  --serve)   Build the site and serve afterwards
"

# Colours for output formatting
RED="\033[0;31m"
GREEN="\033[0;32m"
RESET="\033[0m"

# Builds the website with the trace flag then perform a basic check
# for success be querying if the main page exists; exit(1) on fail
build() {
  echo "Building the site..."
  bundle exec jekyll build --trace
  if test -e "./_site/index.html"; then
    echo "${GREEN}Success!${RESET} The site has built correctly."
  else
    echo "${RED}Error!${RESET} The site doesn't seem to build."
    exit 1
  fi
}

# Removes site output and metadata files without building
clean() {
  bundle exec jekyll clean
}


# Serve the site locally, including any drafted and archived posts
drafts() {
  echo "Serving the site with drafts..."
  bundle exec jekyll serve --trace --drafts
}

# Serve the site locally
serve() {
  echo "Serving the site..."
  bundle exec jekyll serve --trace
}

# Exit with an error code if an unknown flag was used
unknown() {
  echo "${RED}Unknown flag${RESET}, see 'build --help'"
  exit 1
}

case "$1" in
  "")          build;;  # behaviour with no flag
  "--clean")   clean;;
  "--drafts")  build; drafts;;
  "--help")    printf "%s" "${DESCRIPTION}";;
  "--serve")   build; serve;;
  "--test")    build; clean;;
  *)           unknown;;
esac