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47 lines
1.5 KiB
JavaScript
47 lines
1.5 KiB
JavaScript
/* eslint-disable
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handle-callback-err,
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no-unused-vars,
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node/no-deprecated-api,
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*/
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// TODO: This file was created by bulk-decaffeinate.
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// Fix any style issues and re-enable lint.
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/*
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* decaffeinate suggestions:
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* DS101: Remove unnecessary use of Array.from
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* DS102: Remove unnecessary code created because of implicit returns
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* DS207: Consider shorter variations of null checks
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* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
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*/
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let SafeReader;
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const fs = require("fs");
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const logger = require("logger-sharelatex");
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module.exports = (SafeReader = {
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// safely read up to size bytes from a file and return result as a
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// string
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readFile(file, size, encoding, callback) {
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if (callback == null) { callback = function(error, result) {}; }
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return fs.open(file, 'r', function(err, fd) {
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if ((err != null) && (err.code === 'ENOENT')) { return callback(); }
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if (err != null) { return callback(err); }
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// safely return always closing the file
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const callbackWithClose = (err, ...result) =>
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fs.close(fd, function(err1) {
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if (err != null) { return callback(err); }
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if (err1 != null) { return callback(err1); }
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return callback(null, ...Array.from(result));
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})
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;
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const buff = new Buffer(size, 0); // fill with zeros
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return fs.read(fd, buff, 0, buff.length, 0, function(err, bytesRead, buffer) {
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if (err != null) { return callbackWithClose(err); }
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const result = buffer.toString(encoding, 0, bytesRead);
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return callbackWithClose(null, result, bytesRead);
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});
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});
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}
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});
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