$ ruby -e '[10,100,200].each { |x| `inkscape --export-png logo#{x}.png -w #{x} logo.svg` }'

for x in 10 100 200 ; do inkscape --export-png logo${x}.png -w ${x} logo.svg ; done

#!/bin/sh
# Converts the Inkscape icon file ic_launcher_web.svg to the launcher web & app png files.

PROJECT="My Project Name"
INPUT="source-assets/ic_launcher_web.svg"
MAIN="${PROJECT}/src/main/"
RES="${MAIN}res/"
DRAWABLE="${RES}/drawable"

inkscape --shell <<COMMANDS
  --export-png "${MAIN}ic_launcher-web.png"         -w 512 "${INPUT}"
  --export-png "${DRAWABLE}-mdpi/ic_launcher.png"   -w  48 "${INPUT}"
  --export-png "${DRAWABLE}-hdpi/ic_launcher.png"   -w  72 "${INPUT}"
  --export-png "${DRAWABLE}-xhdpi/ic_launcher.png"  -w  96 "${INPUT}"
  --export-png "${DRAWABLE}-xxhdpi/ic_launcher.png" -w 144 "${INPUT}"
quit
COMMANDS

brew install imagemagick --with-librsvg

brew install homebrew/gui/inkscape

convert -density 1536 -background none -resize 100x100 input.svg output-100.png

for s in 10 100 200 ; do convert -density 1536 -background none -resize ${s}x${s} input.svg output-${s}.png ; done