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node_modules/validate-npm-package-name/lib/index.js

@@ -0,0 +1,105 @@
+'use strict'
+const { builtinModules: builtins } = require('module')
+
+var scopedPackagePattern = new RegExp('^(?:@([^/]+?)[/])?([^/]+?)$')
+var blacklist = [
+  'node_modules',
+  'favicon.ico',
+]
+
+function validate (name) {
+  var warnings = []
+  var errors = []
+
+  if (name === null) {
+    errors.push('name cannot be null')
+    return done(warnings, errors)
+  }
+
+  if (name === undefined) {
+    errors.push('name cannot be undefined')
+    return done(warnings, errors)
+  }
+
+  if (typeof name !== 'string') {
+    errors.push('name must be a string')
+    return done(warnings, errors)
+  }
+
+  if (!name.length) {
+    errors.push('name length must be greater than zero')
+  }
+
+  if (name.match(/^\./)) {
+    errors.push('name cannot start with a period')
+  }
+
+  if (name.match(/^_/)) {
+    errors.push('name cannot start with an underscore')
+  }
+
+  if (name.trim() !== name) {
+    errors.push('name cannot contain leading or trailing spaces')
+  }
+
+  // No funny business
+  blacklist.forEach(function (blacklistedName) {
+    if (name.toLowerCase() === blacklistedName) {
+      errors.push(blacklistedName + ' is a blacklisted name')
+    }
+  })
+
+  // Generate warnings for stuff that used to be allowed
+
+  // core module names like http, events, util, etc
+  if (builtins.includes(name.toLowerCase())) {
+    warnings.push(name + ' is a core module name')
+  }
+
+  if (name.length > 214) {
+    warnings.push('name can no longer contain more than 214 characters')
+  }
+
+  // mIxeD CaSe nAMEs
+  if (name.toLowerCase() !== name) {
+    warnings.push('name can no longer contain capital letters')
+  }
+
+  if (/[~'!()*]/.test(name.split('/').slice(-1)[0])) {
+    warnings.push('name can no longer contain special characters ("~\'!()*")')
+  }
+
+  if (encodeURIComponent(name) !== name) {
+    // Maybe it's a scoped package name, like @user/package
+    var nameMatch = name.match(scopedPackagePattern)
+    if (nameMatch) {
+      var user = nameMatch[1]
+      var pkg = nameMatch[2]
+      if (encodeURIComponent(user) === user && encodeURIComponent(pkg) === pkg) {
+        return done(warnings, errors)
+      }
+    }
+
+    errors.push('name can only contain URL-friendly characters')
+  }
+
+  return done(warnings, errors)
+}
+
+var done = function (warnings, errors) {
+  var result = {
+    validForNewPackages: errors.length === 0 && warnings.length === 0,
+    validForOldPackages: errors.length === 0,
+    warnings: warnings,
+    errors: errors,
+  }
+  if (!result.warnings.length) {
+    delete result.warnings
+  }
+  if (!result.errors.length) {
+    delete result.errors
+  }
+  return result
+}
+
+module.exports = validate