utils.sh

#!/bin/bash

dark=false
while getopts d o
do case "$o" in
d) dark=true;;
esac
done
shift $(($OPTIND-1))

# ======================================
#  Constants
# ======================================
theme='Adara'
if $dark; then theme+='-Dark'; fi

theme_dir="$HOME/.themes"

sass_input='scss/cinnamon.scss'
sass_output='cinnamon.css'
sass_style='expanded'
sass_optfile='scss/base/_options.scss'

if type sassc &> /dev/null; then
    sass_command=sassc
elif type sass &> /dev/null; then
    sass_command=sass
else
    echo 'sassc not found'
    exit 1
fi

assets_dirs=(
    'img'
)

watch_dirs=(
    ${assets_dirs[@]}
    'scss'
)

zip_name="$theme.zip"

# Relative to the project's root
package_files=(
    "$theme/cinnamon/cinnamon.css"
    "$theme/cinnamon/thumbnail.png"
    "$theme/cinnamon/img/"
    "$theme/screenshot.png"
)

# Files that need to be moved into the $theme folder
extra_files=(
    'LICENSE'
    'README.md'
)

# ======================================
#  Operations
# ======================================
compile_sass () {
    $sass_command -t "$sass_style" "$sass_input" > "$sass_output"
}

restart_theme () {
    gsettings set org.cinnamon.theme name 'cinnamon'
    gsettings set org.cinnamon.theme name "$theme"
}

symlink_theme () {
    mkdir -p "$theme_dir"
    rm -rf "$theme_dir/$theme"
    ln -rfs "$theme" "$theme_dir/"
}

# Set variable color in the options file (sass)
set_color () {
    local varname="$1"
    local value="$2"

    sed -i "s/\$$varname:.*;/\$$varname: $value;/g" "$sass_optfile"
}

compile_theme () {
    cd "$theme/cinnamon/"
    set_color 'dark-mode' "$dark"
    compile_sass
    cd -
}

install_theme () {
    package_theme &> /dev/null
    mkdir -p "$theme_dir"
    rm -rf "$theme_dir/$theme"

    unzip "$zip_name" -d "$theme_dir"
    rm "$zip_name"

    restart_theme
}

package_theme () {
    rm -f "$zip_name"
    zip -r "$zip_name" "${package_files[@]}"

    for ef in "${extra_files[@]}"; do
        local filename=`basename "$ef"`
        ln -rfs "$ef" "$theme/$filename"
        zip -r "$zip_name" "$theme/$filename"
        rm -rf "$theme/$filename"
    done

    echo "Files compressed into $zip_name"
}

simplify_assets () {
    simplify () {
        scour -i "$1" -o "$2"\
            --remove-metadata \
            --enable-id-stripping \
            --protect-ids-noninkscape \
            --disable-simplify-colors
    }

    # Usage: print_progress PROGRESS TOTAL
    print_progress () {
        local n_cols=$(($(tput cols)-7))
        local cols_completed=$(($1*n_cols/$2))
        local percent_completed=$(($1*100/$2))

        echo -n "$percent_completed% "
        for ((i=0; i<$cols_completed; i++)) {
            echo -n '#'
        }
    }

    cd "$theme/cinnamon/"

    if type scour &> /dev/null ; then

        # temp dir for the output (can't output to self)
        local tmp_dir=$(mktemp -d)
        local assets_list=$(find ${assets_dirs[@]} -name '*.svg' -type f)
        local n_assets=$(echo "$assets_list" | wc -l)
        local completed=0

        for res in $assets_list ; do
            echo -e "> Simplifying \e[34m$(basename $res)\e[0m"
            print_progress $completed $n_assets

            output=$(simplify "$res" "$tmp_dir/out.svg")
            mv "$tmp_dir/out.svg" "$res"

            echo -en '\033[2K\r' # clear old progress bar
            echo "  $output"
            ((completed=completed+1))
        done

        echo 'Simplify assets task finished'
    else
        echo 'scour not found'
    fi
}

watch_files () {
    compile_theme
    symlink_theme
    cd "$theme/cinnamon/"

    if type inotifywait &> /dev/null; then
        echo 'Started watching files (Ctrl+C to exit)'
    else
        echo 'inotifywait (inotify-tools) not found.'
        exit 1
    fi

    while true; do
        compile_sass
        restart_theme
        notify-send "Theme $theme reloaded" \
            --icon='preferences-desktop-theme' \
            --hint=int:transient:1 &> /dev/null

        # Wait until any file changes
        inotifywait --format '%T > %e %w%f' --timefmt '%H:%M:%S' -qre modify "${watch_dirs[@]}"
    done
}

show_help () {
    local bold=$(tput bold)
    local normal=$(tput sgr0)

    echo "\
${bold}USAGE${normal}
  ./$(basename $0) [-d] COMMAND

${bold}OPTIONS${normal}
  -d            The command applies to the dark variant.

${bold}COMMANDS${normal}
  install       Install the theme into the system.

  help          Show help.

${bold}DEVELOPMENT COMMANDS${normal}
  compile       Convert SASS files into CSS.

  pkg           Package files ready to be uploaded to the Cinnamon Spices.

  simplify      Optimize SVG assets for a smaller size and a better theme
                performance stripping metadata and other stuff.

  watch         Refresh the theme while making changes to files and images.
"
}

# ======================================
#  Start point
# ======================================

declare -A operations
operations[install]=install_theme
operations[compile]=compile_theme
operations[help]=show_help
operations[pkg]=package_theme
operations[pkg-all]=pkg_all
operations[simplify]=simplify_assets
operations[watch]=watch_files

opname="$1"
if [[ -z $opname ]]
    then show_help; exit
fi

opfunc="${operations[$opname]}"
shift

if [[ -n "$opfunc" ]]
then $opfunc "$@"
else
    echo "$opname: command not found"
    show_help
fi