calebboyd
58 lines
1.5 KiB
TypeScript
58 lines
1.5 KiB
TypeScript
const fs = require('fs'),
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fd = fs.openSync(process.execPath, 'r'),
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stat = fs.statSync(process.execPath),
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tailSize = Math.min(stat.size, 16000),
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tailWindow = Buffer.from(Array(tailSize))
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fs.readSync(fd, tailWindow, 0, tailSize, stat.size - tailSize)
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const footerPosition = tailWindow.indexOf('<nexe~~sentinel>')
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if (footerPosition == -1) {
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throw 'Invalid Nexe binary'
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}
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const footer = tailWindow.slice(footerPosition, footerPosition + 32),
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contentSize = footer.readDoubleLE(16),
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resourceSize = footer.readDoubleLE(24),
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contentStart = stat.size - tailSize + footerPosition - resourceSize - contentSize,
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resourceStart = contentStart + contentSize
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Object.defineProperty(
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process,
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'__nexe',
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(function () {
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let nexeHeader: any = null
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return {
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get: function () {
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return nexeHeader
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},
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set: function (value: any) {
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if (nexeHeader) {
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throw new Error('This property is readonly')
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}
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nexeHeader = Object.assign({}, value, {
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blobPath: process.execPath,
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layout: {
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stat,
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contentSize,
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contentStart,
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resourceSize,
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resourceStart,
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},
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})
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Object.freeze(nexeHeader)
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},
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enumerable: false,
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configurable: false,
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}
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})()
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)
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const contentBuffer = Buffer.from(Array(contentSize)),
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Module = require('module')
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fs.readSync(fd, contentBuffer, 0, contentSize, contentStart)
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fs.closeSync(fd)
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new Module(process.execPath, null)._compile(contentBuffer.toString(), process.execPath)
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