implement multiple parameters based on https://github.com/telmich/cdist/pull/71 by Sébastien Gross

Signed-off-by: Steven Armstrong <steven@icarus.ethz.ch>

doc/man/man7/cdist-type.text

@@ -74,14 +74,19 @@ DEFINING PARAMETERS
 -------------------
 Every type consists of required, optional and boolean parameters, which must
 be created in a newline seperated file in ***parameter/required***,
-***parameter/optional*** and ***parameter/boolean***. If either is missing,
-the type will have no required, no optional, no boolean or no parameters at
-all.
+***parameter/required_multiple***, ***parameter/optional***, 
+***parameter/optional_multiple*** and ***parameter/boolean***.
+Parameters which are allowed multiple times should be listed in
+required_multiple or optional_multiple respectively. For all other parameters
+the standard unix behaviour of the last given wins is applied.
+If either is missing, the type will have no required, no optional, no boolean
+or no parameters at all. 
 
 Example:
 --------------------------------------------------------------------------------
 echo servername >> conf/type/__nginx_vhost/parameter/required
 echo logdirectory >> conf/type/__nginx_vhost/parameter/optional
+echo server_alias >> conf/type/__nginx_vhost/parameter/optional_multiple
 echo use_ssl >> conf/type/__nginx_vhost/parameter/boolean
 --------------------------------------------------------------------------------
 
@@ -108,6 +113,14 @@ if [ -f "$__object/parameter/use_ssl" ]; then
    # file exists -> True
    # do some fancy ssl stuff
 fi
+
+# parameter with multiple values
+if [ -f "$__object/parameter/server_alias" ]; then
+   for alias in $(cat "$__object/parameter/server_alias"); do
+      echo $alias > /some/where/usefull
+   done
+fi
+
 --------------------------------------------------------------------------------
 
 

lib/cdist/core/cdist_type.py

@@ -81,7 +81,9 @@ class CdistType(object):
 
         self.__explorers = None
         self.__required_parameters = None
+        self.__required_multiple_parameters = None
         self.__optional_parameters = None
+        self.__optional_multiple_parameters = None
         self.__boolean_parameters = None
 
     def __repr__(self):
@@ -130,6 +132,22 @@ class CdistType(object):
                 self.__required_parameters = parameters
         return self.__required_parameters
 
+    @property
+    def required_multiple_parameters(self):
+        """Return a list of required multiple parameters"""
+        if not self.__required_multiple_parameters:
+            parameters = []
+            try:
+                with open(os.path.join(self.absolute_path, "parameter", "required_multiple")) as fd:
+                    for line in fd:
+                        parameters.append(line.strip())
+            except EnvironmentError:
+                # error ignored
+                pass
+            finally:
+                self.__required_multiple_parameters = parameters
+        return self.__required_multiple_parameters
+
     @property
     def optional_parameters(self):
         """Return a list of optional parameters"""
@@ -146,6 +164,22 @@ class CdistType(object):
                 self.__optional_parameters = parameters
         return self.__optional_parameters
 
+    @property
+    def optional_multiple_parameters(self):
+        """Return a list of optional multiple parameters"""
+        if not self.__optional_multiple_parameters:
+            parameters = []
+            try:
+                with open(os.path.join(self.absolute_path, "parameter", "optional_multiple")) as fd:
+                    for line in fd:
+                        parameters.append(line.strip())
+            except EnvironmentError:
+                # error ignored
+                pass
+            finally:
+                self.__optional_multiple_parameters = parameters
+        return self.__optional_multiple_parameters
+
     @property
     def boolean_parameters(self):
         """Return a list of boolean parameters"""

lib/cdist/emulator.py

@@ -89,12 +89,18 @@ class Emulator(object):
 
         parser = argparse.ArgumentParser(add_help=False, argument_default=argparse.SUPPRESS)
 
-        for parameter in self.cdist_type.optional_parameters:
-            argument = "--" + parameter
-            parser.add_argument(argument, dest=parameter, action='store', required=False)
         for parameter in self.cdist_type.required_parameters:
             argument = "--" + parameter
             parser.add_argument(argument, dest=parameter, action='store', required=True)
+        for parameter in self.cdist_type.required_multiple_parameters:
+            argument = "--" + parameter
+            parser.add_argument(argument, dest=parameter, action='append', required=True)
+        for parameter in self.cdist_type.optional_parameters:
+            argument = "--" + parameter
+            parser.add_argument(argument, dest=parameter, action='store', required=False)
+        for parameter in self.cdist_type.optional_multiple_parameters:
+            argument = "--" + parameter
+            parser.add_argument(argument, dest=parameter, action='append', required=False)
         for parameter in self.cdist_type.boolean_parameters:
             argument = "--" + parameter
             parser.add_argument(argument, dest=parameter, action='store_const', const='')

lib/cdist/util/fsproperty.py

@@ -134,6 +134,10 @@ class DirectoryDict(collections.MutableMapping):
     def __setitem__(self, key, value):
         try:
             with open(os.path.join(self.path, key), "w") as fd:
+                if type(value) == type([]):
+                    for v in value:
+                        fd.write(str(v) + '\n')
+                else:
                     fd.write(str(value))
         except EnvironmentError as e:
             raise cdist.Error(str(e))