59 lines
1.7 KiB
JavaScript
59 lines
1.7 KiB
JavaScript
const fs = require('fs');
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const {versionGteLt} = require('../dist/util');
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// In node's core, this is implemented in C
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// https://github.com/nodejs/node/blob/v15.3.0/src/node_file.cc#L891-L985
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/**
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* @param {string} path
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* @returns {[] | [string, boolean]}
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*/
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function internalModuleReadJSON(path) {
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let string
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try {
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string = fs.readFileSync(path, 'utf8')
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} catch (e) {
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if (e.code === 'ENOENT') return []
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throw e
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}
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// Node's implementation checks for the presence of relevant keys: main, name, type, exports, imports
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// Node does this for performance to skip unnecessary parsing.
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// This would slow us down and, based on our usage, we can skip it.
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const containsKeys = true
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return [string, containsKeys]
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}
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// In node's core, this is implemented in C
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// https://github.com/nodejs/node/blob/63e7dc1e5c71b70c80ed9eda230991edb00811e2/src/node_file.cc#L987-L1005
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/**
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* @param {string} path
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* @returns {number} 0 = file, 1 = dir, negative = error
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*/
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function internalModuleStat(path) {
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const stat = fs.statSync(path, { throwIfNoEntry: false });
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if(!stat) return -1;
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if(stat.isFile()) return 0;
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if(stat.isDirectory()) return 1;
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}
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/**
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* @param {string} path
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* @returns {number} 0 = file, 1 = dir, negative = error
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*/
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function internalModuleStatInefficient(path) {
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try {
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const stat = fs.statSync(path);
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if(stat.isFile()) return 0;
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if(stat.isDirectory()) return 1;
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} catch(e) {
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return -e.errno || -1;
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}
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}
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const statSupportsThrowIfNoEntry = versionGteLt(process.versions.node, '15.3.0') ||
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versionGteLt(process.versions.node, '14.17.0', '15.0.0');
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module.exports = {
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internalModuleReadJSON,
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internalModuleStat: statSupportsThrowIfNoEntry ? internalModuleStat : internalModuleStatInefficient
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};
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