hollowtree / pngquant-bin

pngquant bin-wrapper that makes it seamlessly available as a local dependency

pngquant-bin

pngquant is a PNG compressor that significantly reduces file sizes by converting images to a more efficient 8-bit PNG format

You probably want imagemin-pngquant instead.

Install

$ npm install pngquant-bin

Downloading From a Custom Source

By default, this package will download pngquant-bin from GitHub. To use a custom source, set the npm config property imagemin_local_url. The downloader will append /<name>/<version>/vendor/<dist>.

$ npm install pngquant-bin --imagemin_local_url=https://mymirror.local/path

Or add property into your .npmrc file(https://docs.npmjs.com/files/npmrc)

imagemin_local_url=https://mymirror.local/path

Another option is to use the environment variable IMAGEMIN_LOCAL_URL.

$ IMAGEMIN_LOCAL_URL=https://mymirror.local/path npm install pngquant-bin

Usage

const {execFile} = require('child_process');
const pngquant = require('pngquant-bin');

execFile(pngquant, ['-o', 'output.png', 'input.png'], err => {
	console.log('Image minified!');
});

CLI

$ npm install --global pngquant-bin

$ pngquant --help

Updating pre-compiled binaries

The Linux binaries are statically linked so they should work on all Linux distributions. To recompile them:

1. sudo apt-get install libpng-dev
2. ./configure CFLAGS=-static && make && cp pngquant pngquant-64
3. Repeat the above commands, but in a 32-bin docker container started with: docker run -ti -v pwd:/source i386/debian:9.3 bash