const { dirname, resolve } = require('path')
|
|
const fileURLToPath = require('./file-url-to-path/index.js')
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const fs = require('../fs.js')
|
|
// given a path, find the owner of the nearest parent
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const find = async (path) => {
|
// if we have no getuid, permissions are irrelevant on this platform
|
if (!process.getuid) {
|
return {}
|
}
|
|
// fs methods accept URL objects with a scheme of file: so we need to unwrap
|
// those into an actual path string before we can resolve it
|
const resolved = path != null && path.href && path.origin
|
? resolve(fileURLToPath(path))
|
: resolve(path)
|
|
let stat
|
|
try {
|
stat = await fs.lstat(resolved)
|
} finally {
|
// if we got a stat, return its contents
|
if (stat) {
|
return { uid: stat.uid, gid: stat.gid }
|
}
|
|
// try the parent directory
|
if (resolved !== dirname(resolved)) {
|
return find(dirname(resolved))
|
}
|
|
// no more parents, never got a stat, just return an empty object
|
return {}
|
}
|
}
|
|
// given a path, uid, and gid update the ownership of the path if necessary
|
const update = async (path, uid, gid) => {
|
// nothing to update, just exit
|
if (uid === undefined && gid === undefined) {
|
return
|
}
|
|
try {
|
// see if the permissions are already the same, if they are we don't
|
// need to do anything, so return early
|
const stat = await fs.stat(path)
|
if (uid === stat.uid && gid === stat.gid) {
|
return
|
}
|
} catch (err) {}
|
|
try {
|
await fs.chown(path, uid, gid)
|
} catch (err) {}
|
}
|
|
// accepts a `path` and the `owner` property of an options object and normalizes
|
// it into an object with numerical `uid` and `gid`
|
const validate = async (path, input) => {
|
let uid
|
let gid
|
|
if (typeof input === 'string' || typeof input === 'number') {
|
uid = input
|
gid = input
|
} else if (input && typeof input === 'object') {
|
uid = input.uid
|
gid = input.gid
|
}
|
|
if (uid === 'inherit' || gid === 'inherit') {
|
const owner = await find(path)
|
if (uid === 'inherit') {
|
uid = owner.uid
|
}
|
|
if (gid === 'inherit') {
|
gid = owner.gid
|
}
|
}
|
|
return { uid, gid }
|
}
|
|
module.exports = {
|
find,
|
update,
|
validate,
|
}
|
