Implement main executable and CLI

1 files changed, 29 insertions, 0 deletions

diff --git a/lib/cli.rb b/lib/cli.rb
new file mode 100644
index 0000000..f2b185d
--- /dev/null
+++ b/lib/cli.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+class CLI
+  def initialize(args)
+    @args = args
+    validate_arguments
+  end
+
+  def run
+    file_path = @args[0]
+    puts "Running actions from file: #{file_path} against the family tree."
+  end
+
+  private
+
+  def validate_arguments
+    if @args.empty?
+      puts 'Usage: family_tree <path/to/actions.txt>'
+      puts 'Please provide the path to the actions file.'
+      exit 1
+    end
+
+    file_path = @args[0]
+    return if File.exist?(file_path)
+
+    puts "Error: The file '#{file_path}' does not exist."
+    exit 1
+  end
+end