fix: parse date objects from config files (#6236)

Author: wraithgar

workspaces/config/lib/parse-field.js

@@ -20,6 +20,7 @@ const parseField = (f, key, opts, listElement = false) => {
   const isUmask = typeList.has(typeDefs.Umask.type)
   const isNumber = typeList.has(typeDefs.Number.type)
   const isList = !listElement && typeList.has(Array)
+  const isDate = typeList.has(typeDefs.Date.type)
 
   if (Array.isArray(f)) {
     return !isList ? f : f.map(field => parseField(field, key, opts, true))
@@ -53,6 +54,10 @@ const parseField = (f, key, opts, listElement = false) => {
 
   f = envReplace(f, env)
 
+  if (isDate) {
+    return new Date(f)
+  }
+
   if (isPath) {
     const homePattern = platform === 'win32' ? /^~(\/|\\)/ : /^~\//
     if (homePattern.test(f) && home) {

workspaces/config/test/parse-field.js

@@ -34,3 +34,5 @@ t.equal(parseField('1234', 'maxsockets', opts), 1234, 'number is parsed')
 t.equal(parseField('0888', 'umask', opts), '0888',
   'invalid umask is not parsed (will warn later)')
 t.equal(parseField('0777', 'umask', opts), 0o777, 'valid umask is parsed')
+
+t.same(parseField('2020', 'before', opts), new Date('2020'), 'date is parsed')