42 lines
826 B
JavaScript
42 lines
826 B
JavaScript
'use strict';
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const execBuffer = require('exec-buffer');
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const gifsicle = require('gifsicle');
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const isGif = require('is-gif');
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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 (!isGif(buf)) {
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return Promise.resolve(buf);
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}
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const args = ['--no-warnings', '--no-app-extensions'];
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if (opts.interlaced) {
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args.push('--interlace');
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}
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if (opts.optimizationLevel) {
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args.push(`--optimize=${opts.optimizationLevel}`);
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}
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if (opts.colors) {
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args.push(`--colors=${opts.colors}`);
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}
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args.push('--output', execBuffer.output, execBuffer.input);
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return execBuffer({
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input: buf,
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bin: gifsicle,
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args
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}).catch(error => {
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error.message = error.stderr || error.message;
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throw error;
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});
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};
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