55 lines
1.4 KiB
JavaScript
55 lines
1.4 KiB
JavaScript
"use strict";
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import fs from 'fs';
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import Terrain50 from 'terrain50';
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import a from '../../Helpers/Ansi.mjs';
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import l from '../../Helpers/Log.mjs';
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import { percentage } from '../../Helpers/MathsHelpers.mjs';
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export default async function(settings) {
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// 1: Parse settings
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let stream_in = process.stdin;
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if(settings.cli.input !== "-") {
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l.log(`Reading from ${a.hicol}${settings.cli.input}${a.reset}`);
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stream_in = fs.createReadStream(settings.cli.input);
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}
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else
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l.log(`Reading from stdin`);
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let stream_out = process.stdout;
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if(settings.cli.output !== "-") {
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l.log(`Writing to ${a.hicol}${settings.cli.output}${a.reset}`);
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stream_out = fs.createWriteStream(settings.cli.output);
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}
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else
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l.log(`Writing to stdout`);
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let count = settings.cli.count,
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offset = settings.cli.offset;
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// ------------------------------------------------------------------------
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let i = -1;
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for await(let next of Terrain50.ParseStream(stream_in, settings.cli.tolerant ? /\s+/ : " ")) {
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i++;
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if(i < offset) continue;
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// Write it to the output
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let is_last = i - offset >= count - 1;
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await next.serialise(stream_out, is_last);
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// Update the user
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l.log(`Written ${(i - offset) + 1} / ${count} objects (~${percentage((i - offset) + 1, count).toFixed(2)}%)`);
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// Don't go further than we need to
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if(is_last) break;
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}
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l.log(`Slicing complete`);
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stream_in.destroy();
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}
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