Utilities for working with svgs

svg.bash

#
#  Utilities for working with svgs
#
#  svg2png  - Create png file from source svg using inkscape
#  svg2pngr - Create png file from source svg using inkscape recursively
#  svgz     - Create svgz file from source svg
#  svgzr    - Create svgz file from source svg recursively
#


# Create an alias to your inkscape command line utility.
# Edit depending on your setup
alias inkscape="/Applications/Inkscape.app/Contents/Resources/script"


#
# Convert svg files to png files using inkscape
#
function svg2png {

	local file="$1"
	local ext=${file##*.}

	if [[ ! -n $file ]]; then
		echo "No file specified"
		return
	fi

	if [[ $ext != "svg" ]]; then
		echo "Input file must be an svg"
		return
	fi

	# Convert the file path to absolute for inkscape
	if [[ -f "$PWD/$file" ]]; then
		file="$PWD/$file"
	fi

	if [[ ! -f "$file" ]]; then
		echo "File not found"
		return
	fi

	# Determine width of the output png.
	# If no width argument is passed then query the input svg file for a width with inkscape
	local width=${2}
	if [[ ! -n "$2" ]]; then
		width=$(inkscape -W "$file" 2>/dev/null)
		width=$(php -r "echo round( $width );")
	fi

	local dir=$(dirname "$file")
	local basename=$(basename "$file" .svg)
	local subdir="png/${width}x"
	local outputfile="${dir}/$subdir/${basename}.png"

	# Create a sub directory for generated files
	if [[ ! -d "$dir/$subdir" ]]; then
		mkdir -p "$dir/$subdir"
		echo "Creating directory structure"
	fi

	inkscape --export-png="$outputfile" --export-width=$width "$file"
}


#
# Recursively convert found svg files to png files
#
function svg2pngr {

	for f in $(find . -name '*.svg'); do
		svg2png "$f" "$1"
	done
}


#
# Create svgz files from current directory svg files
#
function svgz {

	for f in $(find . -name '*.svg'); do
		local ext=${f##*.}
		if [[ $ext = "svg" ]]; then
			local outfile="$(basename $f .svg).svgz"
			cat "$f" | gzip > "$outfile"
		fi
	done
}


#
# Recursively create svgz files from svg files starting in current directory
#
function svgzr {

	for f in $(find . -name '*.svg'); do
		local dir="$(dirname $f)"
		local outfile="${dir}/$(basename $f .svg).svgz"
		cat "$f" | gzip > "$outfile"
	done
}