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'use strict'
var path = require('path')
var fs = require('graceful-fs')
var log = require('npmlog')
var validate = require('aproba')
var uniq = require('lodash.uniq')
var asyncMap = require('slide').asyncMap
var npm = require('../npm.js')
module.exports = function (actions, next) {
validate('AF', arguments)
var errors = []
asyncMap(actions, function (action, done) {
var cmd = action[0]
var pkg = action[1]
switch (cmd) {
case 'add':
hasAnyWriteAccess(path.resolve(pkg.path, '..'), errors, done)
break
case 'update':
case 'remove':
hasWriteAccess(pkg.path, errors, andHasWriteAccess(path.resolve(pkg.path, '..'), errors, done))
break
case 'move':
hasAnyWriteAccess(pkg.path, errors, andHasWriteAccess(path.resolve(pkg.fromPath, '..'), errors, done))
break
default:
done()
}
}, function () {
if (!errors.length) return next()
uniq(errors.map(function (er) { return 'Missing write access to ' + er.path })).forEach(function (er) {
log.warn('checkPermissions', er)
})
npm.config.get('force') ? next() : next(errors[0])
})
}
function andHasWriteAccess (dir, errors, done) {
validate('SAF', arguments)
return function () {
hasWriteAccess(dir, errors, done)
}
}
function hasAnyWriteAccess (dir, errors, done) {
validate('SAF', arguments)
findNearestDir()
function findNearestDir () {
var nextDir = path.resolve(dir, '..')
exists(dir, function (dirDoesntExist) {
if (!dirDoesntExist || nextDir === dir) {
return hasWriteAccess(dir, errors, done)
} else {
dir = nextDir
findNearestDir()
}
})
}
}
function hasWriteAccess (dir, errors, done) {
validate('SAF', arguments)
access(dir, function (er) {
if (er) errors.push(er)
done()
})
}
var exists = fs.access
? function (dir, done) { fs.access(dir, fs.F_OK, done) }
: function (dir, done) { fs.stat(dir, function (er) { done(accessError(dir, er)) }) }
var access = fs.access
? function (dir, done) { fs.access(dir, fs.W_OK, done) }
: function (dir, done) {
// FIXME: So it turns out that for larger installations on windows
// this sometimes fails. We need to make this work better. Options
// include:
// caching results
// inflighting results
// limiting concurrency
// Maybe all three.
// That this is going through asyncMap and then running ALL THIS
// makes this failure completely unsurprising. 😕
if (process.platform === 'win32') return done()
var tmp = path.join(dir, '.npm.check.permissions')
fs.open(tmp, 'w', function (er, fd) {
if (er) return done(accessError(dir, er))
fs.close(fd, function () {
fs.unlink(tmp, function () { done() })
})
})
}
function accessError (dir, er) {
if (!er) return
var accessEr = new Error("EACCES, access '" + dir + "'", -13)
accessEr.code = 'EACCES'
accessEr.path = dir
return accessEr
}
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