40 lines
679 B
JavaScript
40 lines
679 B
JavaScript
'use strict';
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const execBuffer = require('exec-buffer');
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const isPng = require('is-png');
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const pngcrush = require('pngcrush-bin');
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module.exports = opts => buf => {
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opts = Object.assign({}, opts);
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if (!Buffer.isBuffer(buf)) {
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return Promise.reject(new TypeError('Expected a buffer'));
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}
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if (!isPng(buf)) {
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return Promise.resolve(buf);
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}
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const args = [
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'-brute',
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'-force',
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'-q'
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];
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if (opts.reduce) {
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args.push('-reduce');
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} else {
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args.push('-noreduce');
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}
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args.push(execBuffer.input, execBuffer.output);
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return execBuffer({
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input: buf,
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bin: pngcrush,
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args
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}).catch(err => {
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err.message = err.stderr || err.message;
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throw err;
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});
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};
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