71 lines
1.7 KiB
JavaScript
71 lines
1.7 KiB
JavaScript
// XXX use infer-owner or gentle-fs.mkdir here
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const npm = require('../npm.js')
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const path = require('path')
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const chownr = require('chownr')
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const writeFileAtomic = require('write-file-atomic')
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const mkdirp = require('mkdirp')
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const fs = require('graceful-fs')
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let cache = null
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let cacheUid = null
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let cacheGid = null
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let needChown = typeof process.getuid === 'function'
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const getCacheOwner = () => {
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let st
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try {
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st = fs.lstatSync(cache)
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} catch (er) {
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if (er.code !== 'ENOENT') {
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throw er
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}
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st = fs.lstatSync(path.dirname(cache))
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}
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cacheUid = st.uid
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cacheGid = st.gid
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needChown = st.uid !== process.getuid() ||
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st.gid !== process.getgid()
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}
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const writeOrAppend = (method, file, data) => {
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if (!cache) {
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cache = npm.config.get('cache')
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}
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// redundant if already absolute, but prevents non-absolute files
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// from being written as if they're part of the cache.
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file = path.resolve(cache, file)
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if (cacheUid === null && needChown) {
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getCacheOwner()
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}
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const dir = path.dirname(file)
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const firstMade = mkdirp.sync(dir)
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if (!needChown) {
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return method(file, data)
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}
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let methodThrew = true
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try {
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method(file, data)
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methodThrew = false
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} finally {
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// always try to leave it in the right ownership state, even on failure
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// let the method error fail it instead of the chownr error, though
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if (!methodThrew) {
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chownr.sync(firstMade || file, cacheUid, cacheGid)
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} else {
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try {
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chownr.sync(firstMade || file, cacheUid, cacheGid)
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} catch (_) {}
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}
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}
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}
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exports.append = (file, data) => writeOrAppend(fs.appendFileSync, file, data)
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exports.write = (file, data) => writeOrAppend(writeFileAtomic.sync, file, data)
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