Add Arrow timestamps and utc and utcnow

formica/loader.py

@@ -7,6 +7,7 @@
 import yaml
 from jinja2 import Environment, FileSystemLoader
 from jinja2.exceptions import TemplateSyntaxError, TemplateNotFound
+import arrow
 
 from .exceptions import FormicaArgumentException
 
@@ -84,7 +85,10 @@ def include_file(self, filename, **args):
 
     def render(self, filename, **args):
         template_path = os.path.normpath("{}/{}".format(self.path, filename))
-        return self.env.get_template(template_path).render(code=self.include_file, **args)
+        return self.env.get_template(template_path).render(code=self.include_file,
+                                                           now=arrow.now,
+                                                           utcnow=arrow.utcnow,
+                                                           ** args)
 
     def template(self, indent=4, sort_keys=True, separators=(',', ':'), dumper=None):
         if dumper is not None:

setup.py

@@ -38,8 +38,8 @@
     ],
     keywords='cloudformation, aws, cloud',
     packages=['formica'],
-    install_requires=['boto3>=1.4.4,<2.0.0', 'texttable==1.2.1', 'jinja2==2.10', 'pyyaml==3.12',
-                      'deepdiff==3.3.0'],
+    install_requires=['boto3>=1.4.4,<2.0.0', 'texttable>=1.2.0,<2.0.0', 'jinja2>=2.10,<3.0', 'pyyaml>=3.12,<4.0',
+                      'deepdiff==3.3.0', 'arrow>=0.12.1,<1.0.0'],
     entry_points={
         'console_scripts': [
             'formica=formica.cli:formica',

tests/unit/test_loader.py

@@ -6,6 +6,7 @@
 from path import Path
 
 from formica.loader import Loader
+from datetime import datetime, timedelta
 
 
 @pytest.fixture()
@@ -171,7 +172,7 @@ def test_template_submodule_loads_variables(load, tmpdir):
         with open('test.template.json', 'w') as f:
             f.write(json.dumps(
                 {'Resources': {'TestResource':
-                    {'From': 'Moduledir', 'Properties': {'test': 'Variable'}}}}))
+                               {'From': 'Moduledir', 'Properties': {'test': 'Variable'}}}}))
         load.load()
         actual = json.loads(load.template())
     assert actual == {"Description": "Variable"}
@@ -390,3 +391,25 @@ def test_un_indented_large_templates(load):
     load.cftemplate = {'Resources': {i: 'a' * 84 for i in range(512)}}
     assert len(load.template()) > 51200
     assert len(load.template(indent=None)) < 51200
+
+
+def test_now(load, tmpdir):
+    example = '{"Resources": {"Test": "{{ now().shift(days=1).format("YYYY-MM-DD HH:mm") }}"}}'
+    with Path(tmpdir):
+        with open('test.template.json', 'w') as f:
+            f.write(example)
+        load.load()
+        print(load.template())
+        actual = json.loads(load.template())
+    assert actual == {"Resources": {"Test": (datetime.now() + timedelta(days=1)).strftime("%Y-%m-%d %H:%M")}}
+
+
+def test_utcnow(load, tmpdir):
+    example = '{"Resources": {"Test": "{{ utcnow().shift(days=1).format("YYYY-MM-DD HH:mm") }}"}}'
+    with Path(tmpdir):
+        with open('test.template.json', 'w') as f:
+            f.write(example)
+        load.load()
+        print(load.template())
+        actual = json.loads(load.template())
+    assert actual == {"Resources": {"Test": (datetime.now() + timedelta(days=1)).strftime("%Y-%m-%d %H:%M")}}