1 files changed, 49 insertions, 0 deletions
diff --git a/netzbon/render.py b/netzbon/render.py
new file mode 100755
index 0000000..8bce600
--- /dev/null
+++ b/netzbon/render.py
@@ -0,0 +1,49 @@
+#!/usr/bin/python3
+# This file is in the public domain.
+
+"""Expand Jinja2 templates based on JSON input.
+
+The tool then reads the template from stdin and writes the expanded
+output to stdout.
+
+TODO: proper installation, man page, error handling, --help option.
+
+@author Christian Grothoff
+
+"""
+
+import sys
+import json
+import jinja2
+from jinja2 import BaseLoader
+
+
+class StdinLoader(BaseLoader):
+     def __init__ (self):
+         self.path = '-'
+     def get_source(self, environment, template):
+              source = sys.stdin.read()
+              return source, self.path, lambda: false
+
+
+jsonFile1 = open (sys.argv[1], 'r')
+jsonData1 = json.load(jsonFile1)
+
+jinjaEnv = jinja2.Environment(loader=StdinLoader(),
+                              lstrip_blocks=True,
+                              trim_blocks=True,
+                              undefined=jinja2.StrictUndefined,
+                              autoescape=False)
+tmpl = jinjaEnv.get_template('stdin');
+
+try:
+     print(tmpl.render(data = jsonData1))
+except jinja2.TemplateSyntaxError as error:
+     print("Template syntax error: {error.message} on line {error.lineno}.".format(error=error))
+     exit(1)
+except jinja2.UndefinedError as error:
+     print("Template undefined error: {error.message}.".format(error=error))
+     exit(1)
+except TypeError as error:
+     print("Template type error: {0}.".format(error.args[0]))
+     exit(1)