2 files changed, 117 insertions, 0 deletions
diff --git a/lib/puppet/provider/confine.rb b/lib/puppet/provider/confine.rb
new file mode 100644
index 000000000..e55ba02ec
--- /dev/null
+++ b/lib/puppet/provider/confine.rb
@@ -0,0 +1,76 @@
+# The class that handles testing whether our providers
+# actually work or not.
+class Puppet::Provider::Confine
+    attr_reader :test, :values, :fact
+
+    def exists?(value)
+        value and FileTest.exist?(value)
+    end
+
+    # Are we a facter comparison?
+    def facter?
+        defined?(@facter)
+    end
+
+    # Retrieve the value from facter
+    def facter_value
+        unless defined?(@facter_value) and @facter_value
+            @facter_value = Facter.value(@fact).to_s.downcase
+        end
+        @facter_value
+    end
+
+    def false?(value)
+        ! value
+    end
+
+    def initialize(test, values)
+        values = [values] unless values.is_a?(Array)
+        @values = values
+
+        if %w{exists false true}.include?(test.to_s)
+            @test = test
+            @method = @test.to_s + "?"
+        else
+            @fact = test
+            @test = :facter
+            @method = "match?"
+        end
+    end
+
+    def match?(value)
+        facter_value == value.to_s.downcase
+    end
+
+    # Collect the results of all of them.
+    def result
+        values.collect { |value| send(@method, value) }
+    end
+
+    def true?(value)
+        # Double negate, so we only get true or false.
+        ! ! value
+    end
+
+    # Test whether our confine matches.
+    def valid?
+        values.each do |value|
+            unless send(@method, value)
+                msg = case test
+                when :false:  "false value"
+                when :true:  "true value"
+                when :exists:  "file %s does not exist" % value
+                when :facter:  "facter value '%s' for '%s' not in required list '%s'" % [value, @fact, values.join(",")]
+                end
+                Puppet.debug msg
+                return false
+            end
+        end
+
+        return true
+    ensure
+        # Reset the cache.  We want to cache it during a given
+        # run, but across runs.
+        @facter_value = nil
+    end
+end
diff --git a/lib/puppet/provider/confiner.rb b/lib/puppet/provider/confiner.rb
new file mode 100644
index 000000000..b88f1f01b
--- /dev/null
+++ b/lib/puppet/provider/confiner.rb
@@ -0,0 +1,41 @@
+# Manage a collection of confines, returning a boolean or
+# helpful information.
+require 'puppet/provider/confine'
+
+class Puppet::Provider::Confiner
+    def confine(hash)
+        hash.each do |test, values|
+            @confines << Puppet::Provider::Confine.new(test, values)
+        end
+    end
+
+    def initialize
+        @confines = []
+    end
+
+    # Return a hash of the whole confine set, used for the Provider
+    # reference.
+    def result
+        defaults = {
+            :false => 0,
+            :true => 0,
+            :exists => [],
+            :facter => {}
+        }
+        missing = Hash.new { |hash, key| hash[key] = defaults[key] }
+        @confines.each do |confine|
+            case confine.test
+            when :false: missing[confine.test] += confine.result.find_all { |v| v == false }.length
+            when :true: missing[confine.test] += confine.result.find_all { |v| v == true }.length
+            when :exists: confine.result.zip(confine.values).each { |val, f| missing[:exists] << f unless val }
+            when :facter: missing[:facter][confine.fact] = confine.values if confine.result.include?(false)
+            end
+        end
+
+        missing
+    end
+
+    def valid?
+        ! @confines.detect { |c| ! c.valid? }
+    end
+end