add checkfile package: use check_file(filename) template function to check if file is present.

Author: makkoncept

packages/checkfile/.gitignore

@@ -0,0 +1,5 @@
+dist
+build
+*.pyc
+*.pyo
+*.egg-info

packages/checkfile/README.md

@@ -0,0 +1,3 @@
+# CheckFile
+
+Plugin to check if a file is present.

packages/checkfile/lektor_checkfile.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+import os
+from lektor.pluginsystem import Plugin
+
+
+class CheckfilePlugin(Plugin):
+    name = 'CheckFile'
+    description = u'Plugin to check if a file is present.'
+
+    def on_setup_env(self, **extra):
+
+        def check_file(filename):
+            fn = os.path.join(self.env.root_path, filename)
+            assert os.path.isfile(fn), 'file {} does not exist'.format(fn)
+            return ""
+        self.env.jinja_env.globals.update(
+            check_file=check_file
+        )

packages/checkfile/setup.py

@@ -0,0 +1,38 @@
+import ast
+import io
+import re
+
+from setuptools import setup, find_packages
+
+with io.open('README.md', 'rt', encoding="utf8") as f:
+    readme = f.read()
+
+_description_re = re.compile(r'description\s+=\s+(?P<description>.*)')
+
+with open('lektor_checkfile.py', 'rb') as f:
+    description = str(ast.literal_eval(_description_re.search(
+        f.read().decode('utf-8')).group(1)))
+
+setup(
+    author='mayank',
+    author_email='mayank.nader11@gmail.com',
+    description=description,
+    keywords='Lektor plugin',
+    license='MIT',
+    long_description=readme,
+    long_description_content_type='text/markdown',
+    name='lektor-checkfile',
+    packages=find_packages(),
+    py_modules=['lektor_checkfile'],
+    # url='[link to your repository]',
+    version='0.1',
+    classifiers=[
+        'Framework :: Lektor',
+        'Environment :: Plugins',
+    ],
+    entry_points={
+        'lektor.plugins': [
+            'checkfile = lektor_checkfile:CheckfilePlugin',
+        ]
+    }
+)