initial issue fix

src/contributors/prompt.js

@@ -68,10 +68,25 @@ function getQuestions(options, username, contributions) {
   ]
 }
 
+function getValidUserContributions(options, contributions) {
+  const validContributionTypes = util.contributionTypes(options)
+  const userContributions = contributions && contributions.split(',')
+
+  const validUserContributions = _.filter(
+    userContribution => validContributionTypes[userContribution] !== undefined,
+  )(userContributions)
+
+  if (_.isEmpty(validUserContributions)) {
+    throw new Error('Please specify valid contribution types')
+  }
+
+  return validUserContributions
+}
+
 module.exports = function prompt(options, username, contributions) {
   const defaults = {
     username,
-    contributions: contributions && contributions.split(','),
+    contributions: getValidUserContributions(options, contributions),
   }
   const questions = getQuestions(options, username, contributions)
   return inquirer.prompt(questions).then(_.assign(defaults))

src/generate/format-contribution-type.js

@@ -1,4 +1,5 @@
 const _ = require('lodash/fp')
+
 const util = require('../util')
 
 const linkTemplate = _.template(
@@ -19,8 +20,9 @@ module.exports = function formatContribution(
 
   if (!type) {
     throw new Error(
-      `Unknown contribution type ${contribution} for contributor ${contributor.login ||
-        contributor.name}`,
+      `Unknown contribution type ${
+        contribution
+      } for contributor ${contributor.login || contributor.name}`,
     )
   }