Regain Python 3.2 support

cdist/config.py

@@ -129,7 +129,8 @@ class Config(object):
     @staticmethod
     def hosts(source):
         try:
-            yield from cdist.hostsource.HostSource(source)()
+            for x in cdist.hostsource.HostSource(source)():
+                yield x
         except (IOError, OSError, UnicodeError) as e:
             raise cdist.Error(
                     "Error reading hosts from \'{}\': {}".format(

cdist/core/cdist_object.py

@@ -28,6 +28,11 @@ import cdist.core
 from cdist.util import fsproperty
 
 
+# FileNotFoundError is added in 3.3.
+if not hasattr(__builtins__, 'FileNotFoundError'):
+    FileNotFoundError = (OSError, IOError, )
+
+
 class IllegalObjectIdError(cdist.Error):
     def __init__(self, object_id, message=None):
         self.object_id = object_id

cdist/core/cdist_type.py

@@ -26,6 +26,11 @@ import cdist.core
 import logging
 
 
+# FileNotFoundError is added in 3.3.
+if not hasattr(__builtins__, 'FileNotFoundError'):
+    FileNotFoundError = (OSError, IOError, )
+
+
 class InvalidTypeError(cdist.Error):
     def __init__(self, name, type_path, type_absolute_path):
         self.name = name

cdist/core/manifest.py

@@ -26,6 +26,12 @@ import os
 import cdist
 from . import util
 
+
+# FileNotFoundError is added in 3.3.
+if not hasattr(__builtins__, 'FileNotFoundError'):
+    FileNotFoundError = (OSError, IOError, )
+
+
 '''
 common:
     runs only locally, does not need remote

cdist/emulator.py

@@ -32,6 +32,11 @@ from cdist import flock
 from cdist.core.manifest import Manifest
 
 
+# FileNotFoundError is added in 3.3.
+if not hasattr(__builtins__, 'FileNotFoundError'):
+    FileNotFoundError = (OSError, IOError, )
+
+
 class MissingRequiredEnvironmentVariableError(cdist.Error):
     def __init__(self, name):
         self.name = name

cdist/exec/local.py

@@ -191,9 +191,14 @@ class Local(object):
 
         close_stdout = False
         close_stderr = False
+        stderr_special_devnull = False
+        stdout_special_devnull = False
         if quiet:
-            stderr = subprocess.DEVNULL
-            stdout = subprocess.DEVNULL
+            stderr, close_stderr = util._get_devnull()
+            stderr_special_devnull = not close_stderr
+
+            stdout, close_stdout = util._get_devnull()
+            stdout_special_devnull = not close_stdout
         elif do_save_output:
             if not return_output and stdout is None:
                 stdout = util.get_std_fd(self.stdout_base_path, 'local')
@@ -228,7 +233,9 @@ class Local(object):
                 output = None
 
             if do_save_output:
+                if not stderr_special_devnull:
                     util.log_std_fd(self.log, command, stderr, 'Local stderr')
+                if not stdout_special_devnull:
                     util.log_std_fd(self.log, command, stdout, 'Local stdout')
             return output
         except (OSError, subprocess.CalledProcessError) as error:
@@ -237,8 +244,14 @@ class Local(object):
             if message_prefix:
                 message.merge_messages()
             if close_stdout:
+                if isinstance(stdout, int):
+                    os.close(stdout)
+                else:
                     stdout.close()
             if close_stderr:
+                if isinstance(stderr, int):
+                    os.close(stderr)
+                else:
                     stderr.close()
 
     def run_script(self, script, env=None, return_output=False,

cdist/exec/remote.py

@@ -24,12 +24,10 @@ import os
 import glob
 import subprocess
 import logging
-import multiprocessing
 
 import cdist
 import cdist.exec.util as util
 import cdist.util.ipaddr as ipaddr
-from cdist.mputil import mp_pool_run
 
 
 def _wrap_addr(addr):
@@ -298,10 +296,11 @@ class Remote(object):
         os_environ['__target_fqdn'] = self.target_host[2]
 
         self.log.trace("Remote run: %s", command)
+        special_devnull = False
         try:
             if self.quiet_mode:
-                stderr = subprocess.DEVNULL
-                close_stderr = False
+                stderr, close_stderr = util._get_devnull()
+                special_devnull = not close_stderr
             if return_output:
                 output = subprocess.check_output(command, env=os_environ,
                                                  stderr=stderr).decode()
@@ -311,6 +310,7 @@ class Remote(object):
                 output = None
 
             if self.save_output_streams:
+                if not special_devnull:
                     util.log_std_fd(self.log, command, stderr, 'Remote stderr')
                 util.log_std_fd(self.log, command, stdout, 'Remote stdout')
 
@@ -323,4 +323,7 @@ class Remote(object):
             if close_stdout:
                 stdout.close()
             if close_stderr:
+                if isinstance(stderr, int):
+                    os.close(stderr)
+                else:
                     stderr.close()

cdist/exec/util.py

@@ -172,11 +172,19 @@ def get_std_fd(base_path, name):
     return stdfd
 
 
-def log_std_fd(log, command, stdfd, prefix):
+# subprocess.DEVNULL is added in 3.3.
+if hasattr(subprocess, 'DEVNULL'):
+    def log_std_fd(log, command, stdfd, prefix):
         if stdfd is not None and stdfd != subprocess.DEVNULL:
             stdfd.seek(0, 0)
-        log.trace("Command: {}; {}: {}".format(
-            command, prefix, stdfd.read().decode()))
+            log.trace("Command: {}; {}: {}".format(command, prefix,
+                                                   stdfd.read().decode()))
+else:
+    def log_std_fd(log, command, stdfd, prefix):
+        if stdfd is not None and not isinstance(stdfd, int):
+            stdfd.seek(0, 0)
+            log.trace("Command: {}; {}: {}".format(command, prefix,
+                                                   stdfd.read().decode()))
 
 
 def dist_conf_dir():
@@ -210,3 +218,11 @@ def resolve_conf_dirs_from_config_and_args(args):
     cfg = cdist.configuration.Configuration(args)
     configuration = cfg.get_config(section='GLOBAL')
     return resolve_conf_dirs(configuration, args.conf_dir)
+
+
+# subprocess.DEVNULL is added in 3.3.
+def _get_devnull():
+    if hasattr(subprocess, 'DEVNULL'):
+        return (subprocess.DEVNULL, False)
+    else:
+        return (os.open(os.devnull, os.O_RDWR), True)

cdist/flock.py

@@ -24,6 +24,11 @@ import logging
 import os
 
 
+# FileNotFoundError is added in 3.3.
+if not hasattr(__builtins__, 'FileNotFoundError'):
+    FileNotFoundError = (OSError, IOError, )
+
+
 log = logging.getLogger('cdist-flock')
 
 

cdist/hostsource.py

@@ -68,9 +68,12 @@ class HostSource(object):
             return
 
         if isinstance(self.source, str):
-            yield from self._hosts_from_file()
+            for x in self._hosts_from_file():
+                yield x
         else:
-            yield from self._hosts_from_sequence()
+            for x in self._hosts_from_sequence():
+                yield x
 
     def __call__(self):
-        yield from self.hosts()
+        for x in self.hosts():
+            yield x

cdist/preos.py

@@ -43,18 +43,21 @@ def scan_preos_dir_plugins(dir):
         module_name = fname
         try:
             module = __import__(module_name)
-            yield from preos_plugin(module)
+            for x in preos_plugin(module):
+                yield x
             clsmembers = inspect.getmembers(module, inspect.isclass)
             for cm in clsmembers:
                 c = cm[1]
-                yield from preos_plugin(c)
+                for x in preos_plugin(c):
+                    yield x
         except ImportError as e:
             log.warning("Cannot import '{}': {}".format(module_name, e))
 
 
 def find_preos_plugins():
     for dir in _PLUGINS_PATH:
-        yield from scan_preos_dir_plugins(dir)
+        for x in scan_preos_dir_plugins(dir):
+            yield x
 
 
 def find_preoses():