Add --quiet to bashly add command

lib/bashly/commands/add.rb

@@ -3,7 +3,7 @@ module Commands
     class Add < Base
       help 'Add extra features and customization to your script'
 
-      usage 'bashly add [--source NAME] LIBRARY [ARGS...] [--force]'
+      usage 'bashly add [--source NAME] LIBRARY [ARGS...] [--force --quiet]'
       usage 'bashly add [--source NAME] --list'
       usage 'bashly add (-h|--help)'
 
@@ -17,6 +17,7 @@ class Add < Base
       USAGE
       option '-f --force', 'Overwrite existing files'
       option '-l --list', 'Show available libraries'
+      option '-q --quiet', 'Do not show post-install messages'
 
       attr_reader :skip_src_check
 
@@ -70,7 +71,9 @@ def add_library_files(library)
         end
 
         message = library.post_install_message
-        say "\n#{message}" if message && files_created.positive?
+        return if !message || files_created.zero? || args['--quiet']
+
+        say "\n#{message}"
       end
 
       def safe_write(path, content)

spec/approvals/cli/add/colors-quiet

@@ -0,0 +1 @@
+created spec/tmp/src/lib/colors.sh

spec/approvals/cli/add/help

@@ -1,7 +1,7 @@
 Add extra features and customization to your script
 
 Usage:
-  bashly add [--source NAME] LIBRARY [ARGS...] [--force]
+  bashly add [--source NAME] LIBRARY [ARGS...] [--force --quiet]
   bashly add [--source NAME] --list
   bashly add (-h|--help)
 
@@ -20,5 +20,8 @@ Options:
   -l --list
     Show available libraries
 
+  -q --quiet
+    Do not show post-install messages
+
   -h --help
     Show this help

spec/approvals/cli/add/usage

@@ -1,4 +1,4 @@
 Usage:
-  bashly add [--source NAME] LIBRARY [ARGS...] [--force]
+  bashly add [--source NAME] LIBRARY [ARGS...] [--force --quiet]
   bashly add [--source NAME] --list
   bashly add (-h|--help)

spec/bashly/commands/add_spec.rb

@@ -47,6 +47,17 @@
     end
   end
 
+  describe 'add colors --quiet' do
+    let(:lib_file) { "#{source_dir}/lib/colors.sh" }
+
+    before { reset_tmp_dir create_src: true }
+
+    it 'does not show the post-install message' do
+      expect { subject.execute %w[add colors --quiet] }.to output_approval('cli/add/colors-quiet')
+      expect(File).to exist(lib_file)
+    end
+  end
+
   describe 'add completions' do
     before { reset_tmp_dir init: true }