CHEF-3714: New object dedicated to manipulating text

1 files changed, 92 insertions, 0 deletions

diff --git a/lib/chef/util/editor.rb b/lib/chef/util/editor.rb
new file mode 100644
index 0000000000..973cf48e30
--- /dev/null
+++ b/lib/chef/util/editor.rb
@@ -0,0 +1,92 @@
+#
+# Author:: Chris Bandy (<bandy.chris@gmail.com>)
+# Copyright:: Copyright (c) 2014 Opscode, Inc.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+class Chef
+  class Util
+    class Editor
+      attr_reader :lines
+
+      def initialize(lines)
+        @lines = lines.to_a.clone
+      end
+
+      def append_line_after(search, line_to_append)
+        lines = []
+
+        @lines.each do |line|
+          lines << line
+          lines << line_to_append if line.match(search)
+        end
+
+        (lines.length - @lines.length).tap { @lines = lines }
+      end
+
+      def append_line_if_missing(search, line_to_append)
+        count = 0
+
+        unless @lines.find { |line| line.match(search) }
+          count = 1
+          @lines << line_to_append
+        end
+
+        count
+      end
+
+      def remove_lines(search)
+        count = 0
+
+        @lines.delete_if do |line|
+          count += 1 if line.match(search)
+        end
+
+        count
+      end
+
+      def replace(search, replace)
+        count = 0
+
+        @lines.map! do |line|
+          if line.match(search)
+            count += 1
+            line.gsub!(search, replace)
+          else
+            line
+          end
+        end
+
+        count
+      end
+
+      def replace_lines(search, replace)
+        count = 0
+
+        @lines.map! do |line|
+          if line.match(search)
+            count += 1
+            replace
+          else
+            line
+          end
+        end
+
+        count
+      end
+    end
+  end
+end
+