30 lines
587 B
JavaScript
30 lines
587 B
JavaScript
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'use strict'
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const gfs = require('graceful-fs')
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function readSafe (source, cache) {
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if (cache && cache.files && cache.files.has(source)) {
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return cache.files.get(source)
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}
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const promise = new Promise((resolve, reject) => {
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gfs.readFile(source, (err, contents) => {
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if (err) {
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if (err.code === 'ENOENT') {
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resolve(null)
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} else {
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reject(err)
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}
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} else {
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resolve(contents)
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}
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})
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})
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if (cache && cache.files) {
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cache.files.set(source, promise)
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}
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return promise
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}
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module.exports = readSafe
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