make all templating happen locally, so no jinja2 deps are ever required

lib/ansible/runner.py

@@ -28,6 +28,7 @@ import traceback
 import tempfile
 import subprocess
 import getpass
+import base64
 
 import ansible.constants as C 
 import ansible.connection
@@ -456,13 +457,7 @@ class Runner(object):
         if source is None or dest is None:
             return (host, True, dict(failed=True, msg="src and dest are required"), '')
 
-        if metadata is None:
-            if self.remote_user == 'root':
-                metadata = '/etc/ansible/setup'
-            else:
-                metadata = '~/.ansible/setup'
-
-        # apply templating to source argument
+        # apply templating to source argument so vars can be used in the path
         inject = self.setup_cache.get(conn.host,{})
         source = utils.template(source, inject)
 
@@ -470,40 +465,32 @@ class Runner(object):
 
         if not self.is_playbook:
 
-            # templating remotely, since we don't have the benefit of SETUP_CACHE
-            # TODO: maybe just fetch the setup file to a tempfile            
-
-            # first copy the source template over
-            temppath = tmp + os.path.split(source)[-1]
-            conn.put_file(utils.path_dwim(self.basedir, source), temppath)
-
-            # install the template module
-            template_module = self._transfer_module(conn, tmp, 'template')
-
-            # transfer module vars
-            if self.module_vars:
-                vars = utils.bigjson(self.module_vars)
-                vars_path = self._transfer_str(conn, tmp, 'module_vars', vars)
-                vars_arg=" vars=%s"%(vars_path)
+            # not running from a playbook so we have to fetch the remote
+            # setup file contents before proceeding...
+            if metadata is None:
+                if self.remote_user == 'root':
+                    metadata = '/etc/ansible/setup'
                 else:
-                vars_arg=""
-        
-            # run the template module
-            args = "src=%s dest=%s metadata=%s%s" % (temppath, dest, metadata, vars_arg)
-            (result1, err, executed) = self._execute_module(conn, tmp, template_module, args)
-            (host, ok, data, err) = self._return_from_module(conn, host, result1, err, executed)
+                    metadata = '~/.ansible/setup'
             
-        else:
-            # templating LOCALLY to avoid Jinja2 dependency on nodes inside playbook runs
-            # non-playbook path can be moved to use this IF it is willing to fetch
-            # the metadata file first
+            # install the template module
+            slurp_module = self._transfer_module(conn, tmp, 'slurp')
+
+            # run the slurp module to get the metadata file
+            args = "src=%s" % metadata
+            (result1, err, executed) = self._execute_module(conn, tmp, slurp_module, args)
+            result1 = utils.json_loads(result1)
+            if not 'content' in result1 or result1.get('encoding','base64') != 'base64':
+                result1['failed'] = True
+                return self._return_from_module(conn, host, result1, err, executed)
+            content = base64.b64decode(result1['content'])
+            inject = utils.json_loads(content)
 
         # install the template module
         copy_module = self._transfer_module(conn, tmp, 'copy')
 
-            # playbooks can template locally to avoid the jinja2 dependency
+        # template the source data locally
         source_data = file(utils.path_dwim(self.basedir, source)).read()
-
         resultant = ''            
         try:
             resultant = utils.template(source_data, inject)
@@ -516,7 +503,7 @@ class Runner(object):
         (result1, err, executed) = self._execute_module(conn, tmp, copy_module, args)
         (host, ok, data, err) = self._return_from_module(conn, host, result1, err, executed)
  
-
+        # modify file attribs if needed
         if ok:
             return self._chain_file_module(conn, tmp, data, err, options, executed)
         else:

library/template

@@ -17,120 +17,8 @@
 # You should have received a copy of the GNU General Public License
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
-import sys
-import os
-import jinja2
-import shlex
-try:
-    import json
-except ImportError:
-    import simplejson as json
-
-environment = jinja2.Environment()
-
-# ===========================================
-# convert arguments of form a=b c=d
-# to a dictionary
-# FIXME: make more idiomatic
-
-if len(sys.argv) == 1:
-    sys.exit(1)
-argfile = sys.argv[1]
-if not os.path.exists(argfile):
-    sys.exit(1)
-items = shlex.split(open(argfile, 'r').read())
-
-params = {}
-for x in items:
-    (k, v) = x.split("=")
-    params[k] = v
-
-source  = params['src']
-dest    = params['dest']
-metadata = params.get('metadata', '/etc/ansible/setup')
-metadata = os.path.expanduser(metadata)
-module_vars = params.get('vars')
- 
-# raise an error if there is no template metadata
-if not os.path.exists(metadata):
-    print json.dumps({
-        "failed" : 1,
-        "msg"    : "Missing %s, did you run the setup module yet?" % metadata
-    })
-    sys.exit(1)
-
-# raise an error if we can't parse the template metadata
-#data = {}
-try:
-   f = open(metadata)
-   data = json.loads(f.read())
-   f.close()
-except:
-   print json.dumps({
-       "failed" : 1,
-       "msg"    : "Failed to parse/load %s, rerun the setup module?" % metadata
-   })
-   sys.exit(1)
-
-if module_vars:
-    try:
-        f = open(module_vars)
-        vars = json.loads(f.read())
-        data.update(vars)
-        f.close()
-    except:
-        print json.dumps({
-            "failed" : 1,
-            "msg"    : "Failed to parse/load %s." % module_vars
-        })
-        sys.exit(1)
-
-if not os.path.exists(source):
-    print json.dumps({
-        "failed" : 1,
-        "msg"    : "Source template could not be read: %s" % source
-    })
-    sys.exit(1)
-
-source = file(source).read()
-
-if os.path.isdir(dest):
-    print json.dumps({
-         "failed" : 1,
-         "msg"    : "Destination is a directory"
-    })
-    sys.exit(1)
-
-# record md5sum of original source file so we can report if it changed
-changed = False
-md5sum = None
-if os.path.exists(dest):
-    md5sum = os.popen("md5sum %s" % dest).read().split()[0]
-
-try:
-    # call Jinja2 here and save the new template file
-    template = environment.from_string(source)
-    data_out = template.render(data)
-except jinja2.TemplateError, e:
-    print json.dumps({
-        "failed": True,
-        "msg"   : e.message
-    })
-    sys.exit(1)
-f = open(dest, "w+")
-f.write(data_out)
-f.close()
-
-# record m5sum and return success and whether things have changed
-md5sum2 = os.popen("md5sum %s" % dest).read().split()[0]
-
-if md5sum != md5sum2:
-    changed = True
-
-# mission accomplished
-print json.dumps({
-   "md5sum"   : md5sum2,
-   "changed"  : changed 
-})
-
+# hey the Ansible template module isn't really a remote transferred
+# module.  All the magic happens in Runner.py making use of the
+# copy module, and if not running from a playbook, also the 'slurp'
+# module.