initial rcm playground

4 files changed, 110 insertions, 0 deletions

diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..1a7ea43
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,13 @@
+require_relative 'rcm/rcm'
+
+task :default do |t|
+  rcm do
+    conditions do
+      hostname is :earth
+    end
+
+    file '/etc/wg/wg0.conf' do
+      content 'the content'
+    end
+  end
+end
diff --git a/rcm/conditions.rb b/rcm/conditions.rb
new file mode 100644
index 0000000..f90c74c
--- /dev/null
+++ b/rcm/conditions.rb
@@ -0,0 +1,37 @@
+module RCM
+  # Conditions (e.g. run on host foo)
+  class Conditions
+    require 'socket'
+
+    def initialize
+      @conds = {}
+    end
+
+    def is(arg)
+      arg
+    end
+
+    def method_missing(method_name, *args, &block)
+      @conds[method_name] = args.first
+    end
+
+    def respond_to_missing?
+      true
+    end
+
+    def met?
+      return false if @conds.key?(:hostname) && Socket.gethostname != @conds[:hostname].to_s
+
+      true
+    end
+  end
+
+  # Add conditions "keyword" to the DSL
+  class RCM
+    def conditions(&block)
+      conds = Conditions.new
+      conds.instance_eval(&block)
+      @conds_met = conds.met?
+    end
+  end
+end
diff --git a/rcm/file.rb b/rcm/file.rb
new file mode 100644
index 0000000..2a25a07
--- /dev/null
+++ b/rcm/file.rb
@@ -0,0 +1,33 @@
+module RCM
+  # Managing files
+  class File
+    attr_reader :path
+
+    def initialize(path)
+      @path = path
+    end
+
+    def content(content = nil)
+      content.nil? ? @content : @content = content
+    end
+
+    def to_s
+      @path
+    end
+
+    def do!
+      puts "Evaluating #{self.class}:#{self}"
+    end
+  end
+
+  # Add file keyword to the DSL
+  class RCM
+    def file(path, &block)
+      return unless @conds_met
+
+      f = File.new(path)
+      f.instance_eval(&block)
+      self << f
+    end
+  end
+end
diff --git a/rcm/rcm.rb b/rcm/rcm.rb
new file mode 100644
index 0000000..6c69d7b
--- /dev/null
+++ b/rcm/rcm.rb
@@ -0,0 +1,27 @@
+require_relative 'conditions'
+require_relative 'file'
+ 
+# Ruby Configiration Management system
+module RCM
+  # Here all starts
+  class RCM
+    def initialize
+      @objs = []
+      @conds_met = true
+    end
+
+    def do!
+      @objs.each(&:do!)
+    end
+
+    def <<(obj)
+      @objs << obj
+    end
+  end
+end
+
+def rcm(&block)
+  rcm = RCM::RCM.new
+  rcm.instance_eval(&block)
+  rcm.do!
+end