1 files changed, 85 insertions, 0 deletions
diff --git a/puppet/modules/stdlib/lib/puppet/provider/file_line/ruby.rb b/puppet/modules/stdlib/lib/puppet/provider/file_line/ruby.rb
new file mode 100644
index 00000000..ae1a8b3d
--- /dev/null
+++ b/puppet/modules/stdlib/lib/puppet/provider/file_line/ruby.rb
@@ -0,0 +1,85 @@
+Puppet::Type.type(:file_line).provide(:ruby) do
+  def exists?
+    lines.find do |line|
+      line.chomp == resource[:line].chomp
+    end
+  end
+
+  def create
+    if resource[:match]
+      handle_create_with_match
+    elsif resource[:after]
+      handle_create_with_after
+    else
+      append_line
+    end
+  end
+
+  def destroy
+    local_lines = lines
+    File.open(resource[:path],'w') do |fh|
+      fh.write(local_lines.reject{|l| l.chomp == resource[:line] }.join(''))
+    end
+  end
+
+  private
+  def lines
+    # If this type is ever used with very large files, we should
+    #  write this in a different way, using a temp
+    #  file; for now assuming that this type is only used on
+    #  small-ish config files that can fit into memory without
+    #  too much trouble.
+    @lines ||= File.readlines(resource[:path])
+  end
+
+  def handle_create_with_match()
+    regex = resource[:match] ? Regexp.new(resource[:match]) : nil
+    match_count = count_matches(regex)
+    if match_count > 1 && resource[:multiple].to_s != 'true'
+     raise Puppet::Error, "More than one line in file '#{resource[:path]}' matches pattern '#{resource[:match]}'"
+    end
+    File.open(resource[:path], 'w') do |fh|
+      lines.each do |l|
+        fh.puts(regex.match(l) ? resource[:line] : l)
+      end
+
+      if (match_count == 0)
+        fh.puts(resource[:line])
+      end
+    end
+  end
+
+  def handle_create_with_after
+    regex = Regexp.new(resource[:after])
+    count = count_matches(regex)
+    case count
+    when 1 # find the line to put our line after
+      File.open(resource[:path], 'w') do |fh|
+        lines.each do |l|
+          fh.puts(l)
+          if regex.match(l) then
+            fh.puts(resource[:line])
+          end
+        end
+      end
+    when 0 # append the line to the end of the file
+      append_line
+    else
+      raise Puppet::Error, "#{count} lines match pattern '#{resource[:after]}' in file '#{resource[:path]}'.  One or no line must match the pattern."
+    end
+  end
+
+  def count_matches(regex)
+    lines.select{|l| l.match(regex)}.size
+  end
+
+  ##
+  # append the line to the file.
+  #
+  # @api private
+  def append_line
+    File.open(resource[:path], 'a') do |fh|
+      fh.puts resource[:line]
+    end
+  end
+end