Config files now seem to work, so I am ready to start incorporating them.

git-svn-id: https://reductivelabs.com/svn/puppet/trunk@868 980ebf18-57e1-0310-9a29-db15c13687c0

1 files changed, 164 insertions, 45 deletions

diff --git a/lib/puppet/config.rb b/lib/puppet/config.rb
index 833a2c6e3..3f9f65c47 100644
--- a/lib/puppet/config.rb
+++ b/lib/puppet/config.rb
@@ -1,16 +1,42 @@
 module Puppet
 # The class for handling configuration files.
 class Config
-    # Slight override, since we can't seem to have a subclass where all instances
-    # have the same default block.
-    def [](section)
-        unless self.has_key?(section)
-            self[section] = {}
+    # Retrieve a config value
+    def [](param)
+        param = param.intern unless param.is_a? Symbol
+        if @config.include?(param)
+            if @config[param]
+                val = @config[param].value
+                return val
+            end
+        else
+            nil
+        end
+    end
+
+    # Set a config value.  This doesn't set the defaults, it sets the value itself.
+    def []=(param, value)
+        param = param.intern unless param.is_a? Symbol
+        unless @config.include?(param)
+            @config[param] = newelement(param, value)
         end
-        super
+        @config[param].value = value
+    end
+
+    # Remove all set values.
+    def clear
+        @config.each { |name, obj|
+            obj.clear
+        }
     end
 
-    def initialize(file)
+    # Create a new config object
+    def initialize
+        @config = {}
+    end
+
+    # Parse a configuration file.
+    def parse(file)
         text = nil
 
         begin
@@ -34,64 +60,157 @@ class Config
             when /^\[(\w+)\]$/: section = $1 # Section names
             when /^\s*#/: next # Skip comments
             when /^\s*$/: next # Skip blanks
-            when /^\s*(\w+)\s+(.+)$/: # settings
-                var = $1
+            when /^\s*(\w+)\s*=\s*(.+)$/: # settings
+                var = $1.intern
                 value = $2
-                self[section][var] = value
+                Puppet.info "%s: Setting %s to '%s'" % [section, var, value]
+
+                self[var] = value
+                @config[var].section = section
             else
                 raise Puppet::Error, "Could not match line %s" % line
             end
         }
     end
 
-    def setdefaults(hash)
+    # Create a new element.  The value is passed in because it's used to determine
+    # what kind of element we're creating, but the value itself might be either
+    # a default or a value, so we can't actually assign it.
+    def newelement(param, value)
+        mod = nil
+        case value
+        when true, false, "true", "false":
+            mod = CBoolean
+        when /^\$/, /^\//:
+            mod = CFile
+        when String: # nothing
+        else
+            raise Puppet::Error, "Invalid value '%s'" % value
+        end
+        element = CElement.new(param)
+        element.parent = self
+        if mod
+            element.extend(mod)
+        end
+
+        return element
+    end
+
+    # Set a bunch of defaults in a given section.  The sections are actually pretty
+    # pointless, but they help break things up a bit, anyway.
+    def setdefaults(section, hash)
+        section = section.intern unless section.is_a? Symbol
         hash.each { |param, value|
-            if @defaults.include?(param)
+            if @config.include?(param) and @config[param].default
                 raise Puppet::Error, "Default %s is already defined" % param
             end
+            unless @config.include?(param)
+                @config[param] = newelement(param, value)
+            end
+            @config[param].default = value
+            @config[param].section = section
+        }
+    end
 
-            case value
-            when true, false:
-                @defaults[param] = Boolean.new(param, value)
-            when String:
-                @defaults[param] = Element.new(param, value)
-            when Hash:
-                type = nil
-                unless value.include?(:type)
-                    raise Puppet::Error, "You must include the object type"
-                end
-                unless type = Puppet.type(value[:type])
-                    raise Puppet::Error, "Invalid type %s" % value[:type]
-                end
+    # The base element type.
+    class CElement
+        attr_accessor :name, :section, :default, :parent
 
-                value.delete(:type)
+        # Unset any set value.
+        def clear
+            @value = nil
+        end
 
-                # FIXME this won't work, because we don't want to interpolate the
-                # file name until they actually ask for it
-                begin
-                    @defaults[param] = type.create(value)
-                rescue => detail
-                    raise Puppet::Error, "Could not create default %s: %s" %
-                        [param, detail]
-                end
+        # Create the new element.  Pretty much just sets the name.
+        def initialize(name, value = nil)
+            @name = name
+            if value
+                @value = value
             end
-        }
-    end
+        end
 
-    class Element
-        attr_accessor :name, :value
-    end
+        # Retrieves the value, or if it's not set, retrieves the default.
+        def value
+            retval = nil
+            if defined? @value and ! @value.nil?
+                retval = @value
+            elsif defined? @default
+                retval = @default
+            else
+                return nil
+            end
 
-    class File < Element
-    end
+            if respond_to?(:convert)
+                return convert(retval)
+            else
+                return retval
+            end
+        end
 
-    class Boolean < Element
+        # Set the value.
         def value=(value)
-            unless value == true or value == false
-                raise Puppet::DevError, "Invalid value %s for %s" % [value, @name]
+            if respond_to?(:validate)
+                validate(value)
+            end
+            if respond_to?(:munge)
+                @value = munge(value)
+            else
+                @value = value
             end
+        end
+    end
 
-            @value = value
+    # A file.
+    module CFile
+        attr_accessor :user, :group, :mode, :type
+
+        def convert(value)
+            unless value
+                return nil
+            end
+            if value =~ /\$(\w+)/
+                parent = $1
+                if pval = @parent[parent]
+                    newval = value.sub(/\$#{parent}/, pval)
+                    return File.join(newval.split("/"))
+                else
+                    raise Puppet::DevError, "Could not find value for %s" % parent
+                end
+            else
+                return value
+            end
+        end
+
+        # Set the type appropriately.  Yep, a hack.
+        def munge(value)
+            if @name.to_s =~ /dir/
+                @type = :directory
+            else
+                @type = :file
+            end
+            return value
+        end
+
+        # Make sure any provided variables look up to something.
+        def validate(value)
+            value.scan(/\$(\w+)/) { |name|
+                name = name[0]
+                unless @parent[name]
+                    raise Puppet::Error, "'%s' is unset" % name
+                end
+            }
+        end
+    end
+
+    # A simple boolean.
+    module CBoolean
+        def munge(value)
+            case value
+            when true, "true": return true
+            when false, "false": return false
+            else
+                raise Puppet::Error, "Invalid value %s for %s" % [value, @name]
+            end
         end
     end
 end