ci: pass appropriate configs for file/dir modes

Re: https://npm.community/t/6-11-2-npm-ci-installs-package-with-wrong-permissions/9720

Still passing a plain old (non-Figgy Pudding) object into libcipm,
duplicating the extra keys added in figgy-config.js.

This is not a clean or nice or elegant solution, but it works, without
regressing the config env var issue.

Pairing with @claudiahdz

lib/ci.js

@@ -2,22 +2,42 @@
 
 const npm = require('./npm.js')
 const Installer = require('libcipm')
-const npmlog = require('npmlog')
+const log = require('npmlog')
+const path = require('path')
 
 ci.usage = 'npm ci'
 
 ci.completion = (cb) => cb(null, [])
 
 module.exports = ci
 function ci (args, cb) {
-  const opts = Object.create({ log: npmlog })
+  const opts = {
+    // Add some non-npm-config opts by hand.
+    cache: path.join(npm.config.get('cache'), '_cacache'),
+    // NOTE: npm has some magic logic around color distinct from the config
+    // value, so we have to override it here
+    color: !!npm.color,
+    hashAlgorithm: 'sha1',
+    includeDeprecated: false,
+    log,
+    'npm-session': npm.session,
+    'project-scope': npm.projectScope,
+    refer: npm.referer,
+    dmode: npm.modes.exec,
+    fmode: npm.modes.file,
+    umask: npm.modes.umask,
+    npmVersion: npm.version,
+    tmp: npm.tmp
+  }
+
   for (const key in npm.config.list[0]) {
     if (key !== 'log') {
       opts[key] = npm.config.list[0][key]
     }
   }
+
   return new Installer(opts).run().then(details => {
-    npmlog.disableProgress()
+    log.disableProgress()
     console.log(`added ${details.pkgCount} packages in ${
       details.runTime / 1000
     }s`)

lib/config/figgy-config.js

@@ -9,7 +9,7 @@ const npm = require('../npm.js')
 const pack = require('../pack.js')
 const path = require('path')
 
-const npmSession = crypto.randomBytes(8).toString('hex')
+const npmSession = npm.session = crypto.randomBytes(8).toString('hex')
 log.verbose('npm-session', npmSession)
 
 const SCOPE_REGISTRY_REGEX = /@.*:registry$/gi

test/tap/ci-permissions.js

@@ -0,0 +1,45 @@
+const t = require('tap')
+const tar = require('tar')
+const common = require('../common-tap.js')
+const pkg = common.pkg
+const rimraf = require('rimraf')
+const { writeFileSync, statSync, chmodSync } = require('fs')
+const { resolve } = require('path')
+const mkdirp = require('mkdirp')
+
+t.test('setup', t => {
+  mkdirp.sync(resolve(pkg, 'package'))
+  const pj = resolve(pkg, 'package', 'package.json')
+  writeFileSync(pj, JSON.stringify({
+    name: 'foo',
+    version: '1.2.3'
+  }))
+  chmodSync(pj, 0o640)
+  tar.c({
+    sync: true,
+    file: resolve(pkg, 'foo.tgz'),
+    gzip: true,
+    cwd: pkg
+  }, ['package'])
+  writeFileSync(resolve(pkg, 'package.json'), JSON.stringify({
+    name: 'root',
+    version: '1.2.3',
+    dependencies: {
+      foo: 'file:foo.tgz'
+    }
+  }))
+  t.end()
+})
+
+t.test('run install to generate package-lock', t =>
+  common.npm(['install'], { cwd: pkg }).then(([code]) => t.equal(code, 0)))
+
+t.test('remove node_modules', t => rimraf(resolve(pkg, 'node_modules'), t.end))
+
+t.test('run ci and check modes', t =>
+  common.npm(['ci'], { cwd: pkg, stdio: 'inherit' }).then(([code]) => {
+    t.equal(code, 0)
+    const file = resolve(pkg, 'node_modules', 'foo', 'package.json')
+    const mode = statSync(file).mode & 0o707
+    t.equal(mode, 0o604)
+  }))