From dab1d03d81c538966d03fb9318a4588a9e803b44 Mon Sep 17 00:00:00 2001
From: Sol Jerome <sol.jerome@gmail.com>
Date: Sat, 24 Mar 2012 11:20:07 -0500
Subject: Allow to run directly from a git checkout (#1037)

Signed-off-by: Sol Jerome <sol.jerome@gmail.com>
---
 src/lib/Bcfg2/Server/Plugins/TCheetah.py | 80 ++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 src/lib/Bcfg2/Server/Plugins/TCheetah.py

(limited to 'src/lib/Bcfg2/Server/Plugins/TCheetah.py')

diff --git a/src/lib/Bcfg2/Server/Plugins/TCheetah.py b/src/lib/Bcfg2/Server/Plugins/TCheetah.py
new file mode 100644
index 000000000..8879fdef1
--- /dev/null
+++ b/src/lib/Bcfg2/Server/Plugins/TCheetah.py
@@ -0,0 +1,80 @@
+'''This module implements a templating generator based on Cheetah'''
+
+import binascii
+import logging
+import sys
+import traceback
+import Bcfg2.Server.Plugin
+# py3k compatibility
+if sys.hexversion >= 0x03000000:
+    unicode = str
+
+logger = logging.getLogger('Bcfg2.Plugins.TCheetah')
+
+try:
+    import Cheetah.Template
+    import Cheetah.Parser
+except:
+    logger.error("TCheetah: Failed to import Cheetah. Is it installed?")
+    raise
+
+
+class TemplateFile:
+    """Template file creates Cheetah template structures for the loaded file."""
+
+    def __init__(self, name, specific, encoding):
+        self.name = name
+        self.specific = specific
+        self.encoding = encoding
+        self.template = None
+        self.searchlist = dict()
+
+    def handle_event(self, event):
+        """Handle all fs events for this template."""
+        if event.code2str() == 'deleted':
+            return
+        try:
+            s = {'useStackFrames': False}
+            self.template = Cheetah.Template.Template(open(self.name).read(),
+                                                      compilerSettings=s,
+                                                      searchList=self.searchlist)
+        except Cheetah.Parser.ParseError:
+            perror = sys.exc_info()[1]
+            logger.error("Cheetah parse error for file %s" % (self.name))
+            logger.error(perror.report())
+
+    def bind_entry(self, entry, metadata):
+        """Build literal file information."""
+        self.template.metadata = metadata
+        self.searchlist['metadata'] = metadata
+        self.template.path = entry.get('realname', entry.get('name'))
+        self.searchlist['path'] = entry.get('realname', entry.get('name'))
+        self.template.source_path = self.name
+        self.searchlist['source_path'] = self.name
+
+        if entry.tag == 'Path':
+            entry.set('type', 'file')
+        try:
+            if type(self.template) == unicode:
+                entry.text = self.template
+            else:
+                if entry.get('encoding') == 'base64':
+                    # take care of case where file needs base64 encoding
+                    entry.text = binascii.b2a_base64(self.template)
+                else:
+                    entry.text = unicode(str(self.template), self.encoding)
+        except:
+            (a, b, c) = sys.exc_info()
+            msg = traceback.format_exception(a, b, c, limit=2)[-1][:-1]
+            logger.error(msg)
+            logger.error("TCheetah template error for %s" % self.searchlist['path'])
+            del a, b, c
+            raise Bcfg2.Server.Plugin.PluginExecutionError
+
+
+class TCheetah(Bcfg2.Server.Plugin.GroupSpool):
+    """The TCheetah generator implements a templating mechanism for configuration files."""
+    name = 'TCheetah'
+    __author__ = 'bcfg-dev@mcs.anl.gov'
+    filename_pattern = 'template'
+    es_child_cls = TemplateFile
-- 
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