PiPer/make.sh

#!/bin/bash
#
# Make the PiPer Safari extension

EXTENSION_NAME="PiPer"

# Build tool paths; fallback to local build tools
CSSO_PATH=$(type "csso" >/dev/null 2>&1 && echo "csso" || echo "./build-tools/csso")
CCJS_PATH=$(type "google-closure-compiler-js" >/dev/null 2>&1 && echo "google-closure-compiler-js" || echo "./build-tools/google-closure-compiler-js")
XARJS_PATH=$(type "xarjs" >/dev/null 2>&1 && echo "xarjs" || echo "./build-tools/xarjs")
SVGO_PATH=$(type "svgo" >/dev/null 2>&1 && echo "svgo" || echo "./build-tools/svgo")

# Certifcate paths
LEAF_CERT_PATH="../certs/cert.pem"
INTERMEDIATE_CERT_PATH="../certs/apple-intermediate.pem"
ROOT_CERT_PATH="../certs/apple-root.pem"
PRIVATE_KEY_PATH="../certs/privatekey.pem"


# Display help then exit
show_help() {
  cat << EOF
Usage: make.sh [options]

Options:
  -h -? --help                  Show this screen
  -p --profile <release|debug>  Set settings according to profile [default: debug]
  -c --compress-css             Compress CSS
  -j --compress-js              Compress JavaScript
  -s --compress-svg             Compress SVG
  -e --package-extension        Package Safari extension (requires private key)
  -v --no-version-increment     Disable automatic version incrementing
EOF
  exit 0
}

arguments=("$@")

# First pass processing arguments
while :; do
  case $1 in
    -h|-\?|--help) show_help ;;
    -p|--profile) [[ "$2" ]] && profile=$2 ;;
    --profile=?*) profile=${1#*=} ;;
    -?*) ;;
    *) break
  esac
  shift
done

# Set default settings as per profile
case $profile in
  release)
    compress_svg=1
    compress_css=1
    compress_js=1
    package_ext=1
    ;;
  *)
    compress_svg=0
    compress_css=0
    compress_js=0
    package_ext=0
esac
update_version=1

set -- "${arguments[@]}"

# Second pass processing arguments
while :; do
  case $1 in
    -c|--compress-css) compress_css=1 ;;
    -j|--compress-js) compress_js=1 ;;
    -s|--compress-svg) compress_svg=1 ;;
    -e|--package-extension) package_ext=1 ;;
    -v|--no-version-increment) update_version=0 ;;
    -p|--profile) shift ;;
    -?*) ;;
    *) break
  esac
  shift
done

# Check for git and exit if not found
if [[ "${update_version}" -eq 1 ]] && { ! type "git" &>/dev/null; }; then
  echo "Error: 'git' command not found" >&2
  echo "Please install the latest version of git (see https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)" >&2
  exit 1
else
  GIT_PATH=$(sh /etc/profile; which git)
fi


#
# Build script
#

# Set working directory to project root
project_root=$(cd -P -- "$(dirname -- "$0")" && pwd -P)
cd "$project_root" || exit

# Remove output folder
rm -rf out

# Make output folder
mkdir -p "out/${EXTENSION_NAME}.safariextension"

# Copy items into output folder
cp -r src/* "out/${EXTENSION_NAME}.safariextension/"

# Compress all supported images with SVGO
if [[ "$compress_svg" -eq 1 ]]; then
  ${SVGO_PATH} -q -f "out/${EXTENSION_NAME}.safariextension/images"
fi

# Compress all inline CSS with CSSO
if [[ "$compress_css" -eq 1 ]]; then
  function minify_css() { 
    echo "$@" | sed -e 's/\\"/"/g' -e 's/\\\$/$/g' | ${CSSO_PATH} --declaration-list
  }
  export -f minify_css
  export CSSO_PATH
  for path in "out/${EXTENSION_NAME}.safariextension/scripts"/*.js; do
    source=$(cat "${path}")
    echo "echo \"$(sed -e 's/\\/\\\\/g' -e 's/\$/\\$/g' -e 's/\`/\\`/g' -e 's/\"/\\\"/g' -e 's/\\n/\\\\n/g' <<< "$source" \
      | perl -0pe 's/\/\*\*\s+CSS\s+\*\/\s*\(\s*\\`(.*?)\\`\s*\)/\\`\$(minify_css '\''$1'\'')\\`/gms')\"" \
      | sh > "${path}"
  done
fi

# Get current version from git if automatic versioning enabled
if [[ "${update_version}" -eq 1 ]]; then

  # Check we're inside a git work tree
  inside_git_repo="$(git rev-parse --is-inside-work-tree 2>/dev/null)"
  if [[ "${inside_git_repo}" ]]; then

    # Get number of commits and release version from most recent tag
    number_of_commits=$(($("${GIT_PATH}" rev-list HEAD --count) + 1))
    git_release_version=$("${GIT_PATH}" describe --tags --always --abbrev=0)
    git_release_version=${git_release_version%%-*};
    git_release_version=${git_release_version#*v};    

  # Otherwise issue warning and set blank version
  else
    echo "Warning: Unable to set version automatically as cannot find 'git' repository (ensure repository has been cloned to fix this)" >&2
    number_of_commits="0"
    git_release_version="0.0.0"
  fi
  
  # Helper performs multiline sed regular expression
  function multiline_sed_regex() {
    mv "$1" "$1.bak"
    echo -n "$(cat "$1.bak")" | tr "\n" "\f" | sed -E "$2" | tr "\f" "\n" > "$1"
    rm -rf "$1.bak"
  }
fi

# Use closure compiler to compress javascript
if [[ "$compress_js" -eq 1 ]]; then
  for path in "out/${EXTENSION_NAME}.safariextension/scripts"/*.js; do
    [[ $(basename $path) == "externs.js" ]] && continue
    path=${path%.*}
    ${CCJS_PATH} \
      --compilationLevel ADVANCED \
      --warningLevel VERBOSE \
      --newTypeInf \
      --useTypesForOptimization \
      --externs "out/${EXTENSION_NAME}.safariextension/scripts/externs.js" \
    "${path}.js" > "${path}.min.js"
      mv "${path}.min.js" "${path}.js"
  done
fi
rm "out/${EXTENSION_NAME}.safariextension/scripts/externs.js"

# Update version info from git
if [[ "${update_version}" -eq 1 ]]; then
  info_plist="out/${EXTENSION_NAME}.safariextension/Info.plist"
  update_plist="update.plist"
  multiline_sed_regex "${info_plist}" "s|(> *CFBundleShortVersionString *</key>[^>]+>)[^<]+|\1${git_release_version}|g"
  multiline_sed_regex "${info_plist}" "s|(> *CFBundleVersion *</key>[^>]+>)[^<]+|\1${number_of_commits}|g"
  multiline_sed_regex "${update_plist}" "s|(> *CFBundleShortVersionString *</key>[^>]+>)[^<]+|\1${git_release_version}|g"
  multiline_sed_regex "${update_plist}" "s|(> *CFBundleVersion *</key>[^>]+>)[^<]+|\1${number_of_commits}|g"
fi

# Package safari extension
if [[ "${package_ext}" -eq 1 ]] && [[ -f "out/${PRIVATE_KEY_PATH}" ]]; then
  (cd out && ${XARJS_PATH} create "${EXTENSION_NAME}.safariextz" --cert "${LEAF_CERT_PATH}" --cert "${INTERMEDIATE_CERT_PATH}" --cert "${ROOT_CERT_PATH}" --private-key "${PRIVATE_KEY_PATH}" "${EXTENSION_NAME}.safariextension")
  rm -rf "out/${EXTENSION_NAME}.safariextension"
fi
echo "Done."