/BatchSVGtoPNG

Dockerfile and python code for batch conversion of SVG to PNG

Primary LanguagePythonMIT LicenseMIT

BatchSVGtoPNG

cover.png

Introduction

If you want to convert SVG files repeatedly, it is bothering to open and save files each time. Then CairoSVG is a good python library for converting SVG to PNG. But building a python environment is also bothering me, so this repository manages the following things.

  • Dockerfile for environment to use python and CairoSVG
  • python code for batch file conversion
  • Memorandum for docker commands

Installation

  1. Install docker.
  2. Build Dockerfile with following command.
docker build -t python-cairosvg:latest .

Usage

Single file conversion on macOS

  1. Run docker image with mounting current directory as working directory.
docker run --rm -it -v $(pwd):/var/python python-dl bash

  1. Put SVG file (ex. image.svg) to src directory.

  2. Run cairosvg command.

cairosvg src/image.svg -o dst/image.png

Multiple file conversion on macOS

  1. Run docker image with mounting current directory as working directory.
docker run --rm -it -v $(pwd):/var/python python-cairosvg bash

  1. Put SVG files (ex. image.svg) to src directory.

  2. Run python script.

python convert.py
  1. All SVG files inside ./src will be converted and saved to ./dst

Cleanup old build after updating Dockerfile

If you build Dockerfile after updating it, the previous build may remain like following log.

$ docker images
REPOSITORY          TAG                 IMAGE ID            CREATED              SIZE
python-dl           latest              c6d6f509ae5b        3 seconds ago        1.21GB
<none>              <none>              6e119ff05b9e        About a minute ago   1.21GB  <- Previous build
python              latest              a4cc999cf2aa        2 days ago           929MB

Then you can cleanup these images by following command.

docker rmi $(docker images -qa -f 'dangling=true')