Provide script to generate PNG icons from SVGs

Used to internally update PNGs of the different sizes
when altering the SVG icons.

scripts/svg_to_png.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# abort on first error
+set -e
+
+if [[ ! $@ ]]; then
+    echo 'Updates the the PNG icons of the projects in the specified directories.'
+    echo 'However, no project directories have been specified.'
+    exit -1
+fi
+
+# define array for commands to be executed
+cmds=()
+
+# iterate over specified source directories
+for srcdir in "$@"; do
+    # find SVG icons
+    for svg_icon_full_path in $(find "$srcdir" -iname '*.svg'); do
+        prefix="${svg_icon_full_path%/scalable/*}"
+        svg_icon="${svg_icon_full_path##*/scalable/}"
+        # add inkscape command for each icon and size and ensure ouput directory exists
+        for size in 16 32 48; do
+            mkdir -p "${prefix}/${size}x${size}/${svg_icon%/*.svg}"
+            cmds+=("inkscape --without-gui \"${svg_icon_full_path}\" --export-png=\"${prefix}/${size}x${size}/${svg_icon%.svg}.png\" --export-width=${size} --export-height=${size}")
+        done
+    done
+done
+
+# run commands
+function print_cmds {
+    for cmd in "${cmds[@]}"; do
+        echo "$cmd"
+    done
+}
+echo "Executing the following commands:"
+print_cmds
+print_cmds | parallel