better CLI usage

packages/create-freesewing-pattern/lib/get-default-library-params.js

@@ -0,0 +1,49 @@
+'use strict'
+
+const getGitConfigPath = require('git-config-path')
+const githubUsername = require('github-username')
+const parseGitConfig = require('parse-git-config')
+const which = require('which')
+
+const config = require('./config')
+
+module.exports = async () => {
+  const defaults = {
+    name: '',
+    description: '',
+    author: config.get('author'),
+    repo: (info) => `${info.author}/${info.name}`,
+    license: config.get('license', 'MIT'),
+    manager: config.get('manager', 'npm')
+  }
+
+  try {
+    if (!config.get('author')) {
+      const gitConfigPath = getGitConfigPath('global')
+
+      if (gitConfigPath) {
+        const gitConfig = parseGitConfig.sync({ path: gitConfigPath })
+
+        if (gitConfig.github && gitConfig.github.user) {
+          defaults.author = gitConfig.github.user
+        } else if (gitConfig.user && gitConfig.user.email) {
+          defaults.author = await githubUsername(gitConfig.user.email)
+        }
+      }
+
+      if (defaults.author) {
+        config.set('author', defaults.author)
+      }
+    }
+
+    if (!config.get('manager')) {
+      if (which.sync('yarn', { nothrow: true })) {
+        defaults.manager = 'yarn'
+      }
+
+      config.set('manager', defaults.manager || 'npm')
+    }
+  } catch (err) { }
+
+  return defaults
+}