feat(cli/helpers): Check if the directory contains files that could conflict

Author: getspooky

cli/helpers/is-folder-empty.ts

@@ -0,0 +1,62 @@
+import { green, blue } from 'https://deno.land/[email protected]/fmt/colors.ts'
+import { join } from "https://deno.land/std/path/mod.ts"
+
+export default function (root: string, name: string): boolean {
+  const validFiles = [
+    '.DS_Store',
+    '.git',
+    '.gitattributes',
+    '.gitignore',
+    '.gitlab-ci.yml',
+    '.hg',
+    '.hgcheck',
+    '.hgignore',
+    '.idea',
+    '.npmignore',
+    '.travis.yml',
+    'LICENSE',
+    'Thumbs.db',
+    'docs',
+    'mkdocs.yml',
+  ]
+
+  const conflicts = []
+
+  for (const { name: file } of Deno.readDirSync(root)) {
+    // Support IntelliJ IDEA-based editors
+    if (validFiles.includes(file) || /\.iml$/.test(file)) {
+      conflicts.push(file)
+    }
+  }
+
+  if (conflicts.length > 0) {
+    console.log(
+      `The directory ${green(name)} contains files that could conflict:`
+    )
+    console.log()
+
+    for (const file of conflicts) {
+      try {
+        const stats = Deno.lstatSync(join(root, file))
+        if (stats.isDirectory) {
+          console.log(`  ${blue(file)}/`)
+        } else {
+          console.log(`  ${file}`)
+        }
+      } catch {
+        console.log(`  ${file}`)
+      }
+    }
+
+    console.log()
+    console.log(
+      'Either try using a new directory name, or remove the files listed above.'
+    )
+    console.log()
+
+    return false
+  }
+
+  return true
+
+}