1 files changed, 202 insertions, 0 deletions
diff --git a/lib/facter/facter_dot_d.rb b/lib/facter/facter_dot_d.rb
new file mode 100644
index 0000000..e414b20
--- /dev/null
+++ b/lib/facter/facter_dot_d.rb
@@ -0,0 +1,202 @@
+# A Facter plugin that loads facts from /etc/facter/facts.d
+# and /etc/puppetlabs/facter/facts.d.
+#
+# Facts can be in the form of JSON, YAML or Text files
+# and any executable that returns key=value pairs.
+#
+# In the case of scripts you can also create a file that
+# contains a cache TTL.  For foo.sh store the ttl as just
+# a number in foo.sh.ttl
+#
+# The cache is stored in /tmp/facts_cache.yaml as a mode
+# 600 file and will have the end result of not calling your
+# fact scripts more often than is needed
+
+class Facter::Util::DotD
+  require 'yaml'
+
+  def initialize(dir="/etc/facts.d", cache_file="/tmp/facts_cache.yml")
+    @dir = dir
+    @cache_file = cache_file
+    @cache = nil
+    @types = {".txt" => :txt, ".json" => :json, ".yaml" => :yaml}
+  end
+
+  def entries
+    Dir.entries(@dir).reject{|f| f =~ /^\.|\.ttl$/}.sort.map {|f| File.join(@dir, f) }
+  rescue
+    []
+  end
+
+  def fact_type(file)
+    extension = File.extname(file)
+
+    type = @types[extension] || :unknown
+
+    type = :script if type == :unknown && File.executable?(file)
+
+    return type
+  end
+
+  def txt_parser(file)
+    File.readlines(file).each do |line|
+      if line =~ /^(.+)=(.+)$/
+        var = $1; val = $2
+
+        Facter.add(var) do
+          setcode { val }
+        end
+      end
+    end
+  rescue Exception => e
+    Facter.warn("Failed to handle #{file} as text facts: #{e.class}: #{e}")
+  end
+
+  def json_parser(file)
+    begin
+      require 'json'
+    rescue LoadError
+      retry if require 'rubygems'
+      raise
+    end
+
+    JSON.load(File.read(file)).each_pair do |f, v|
+      Facter.add(f) do
+        setcode { v }
+      end
+    end
+  rescue Exception => e
+    Facter.warn("Failed to handle #{file} as json facts: #{e.class}: #{e}")
+  end
+
+  def yaml_parser(file)
+    require 'yaml'
+
+    YAML.load_file(file).each_pair do |f, v|
+      Facter.add(f) do
+        setcode { v }
+      end
+    end
+  rescue Exception => e
+    Facter.warn("Failed to handle #{file} as yaml facts: #{e.class}: #{e}")
+  end
+
+  def script_parser(file)
+    result = cache_lookup(file)
+    ttl = cache_time(file)
+
+    unless result
+      result = Facter::Util::Resolution.exec(file)
+
+      if ttl > 0
+        Facter.debug("Updating cache for #{file}")
+        cache_store(file, result)
+        cache_save!
+      end
+    else
+      Facter.debug("Using cached data for #{file}")
+    end
+
+    result.split("\n").each do |line|
+      if line =~ /^(.+)=(.+)$/
+        var = $1; val = $2
+
+        Facter.add(var) do
+          setcode { val }
+        end
+      end
+    end
+  rescue Exception => e
+    Facter.warn("Failed to handle #{file} as script facts: #{e.class}: #{e}")
+    Facter.debug(e.backtrace.join("\n\t"))
+  end
+
+  def cache_save!
+    cache = load_cache
+    File.open(@cache_file, "w", 0600) {|f| f.write(YAML.dump(cache)) }
+  rescue
+  end
+
+  def cache_store(file, data)
+    load_cache
+
+    @cache[file] = {:data => data, :stored => Time.now.to_i}
+  rescue
+  end
+
+  def cache_lookup(file)
+    cache = load_cache
+
+    return nil if cache.empty?
+
+    ttl = cache_time(file)
+
+    if cache[file]
+      now = Time.now.to_i
+
+      return cache[file][:data] if ttl == -1
+      return cache[file][:data] if (now - cache[file][:stored]) <= ttl
+      return nil
+    else
+      return nil
+    end
+  rescue
+    return nil
+  end
+
+  def cache_time(file)
+    meta = file + ".ttl"
+
+    return File.read(meta).chomp.to_i
+  rescue
+    return 0
+  end
+
+  def load_cache
+    unless @cache
+      if File.exist?(@cache_file)
+        @cache = YAML.load_file(@cache_file)
+      else
+        @cache = {}
+      end
+    end
+
+    return @cache
+  rescue
+    @cache = {}
+    return @cache
+  end
+
+  def create
+    entries.each do |fact|
+      type = fact_type(fact)
+      parser = "#{type}_parser"
+
+      if respond_to?("#{type}_parser")
+        Facter.debug("Parsing #{fact} using #{parser}")
+
+        send(parser, fact)
+      end
+    end
+  end
+end
+
+
+mdata = Facter.version.match(/(\d+)\.(\d+)\.(\d+)/)
+if mdata
+  (major, minor, patch) = mdata.captures.map { |v| v.to_i }
+  if major < 2
+    # Facter 1.7 introduced external facts support directly
+    unless major == 1 and minor > 6
+      Facter::Util::DotD.new("/etc/facter/facts.d").create
+      Facter::Util::DotD.new("/etc/puppetlabs/facter/facts.d").create
+
+      # Windows has a different configuration directory that defaults to a vendor
+      # specific sub directory of the %COMMON_APPDATA% directory.
+      if Dir.const_defined? 'COMMON_APPDATA' then
+        windows_facts_dot_d = File.join(Dir::COMMON_APPDATA, 'PuppetLabs', 'facter', 'facts.d')
+        Facter::Util::DotD.new(windows_facts_dot_d).create
+      end
+    end
+  end
+end