120 lines
3.2 KiB
Python
Executable File
120 lines
3.2 KiB
Python
Executable File
#!/usr/bin/env python3
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import importlib
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import json
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import os
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import os.path
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import sys
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import jinja2
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import yaml
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J2_MODULES_DEFAULT = 'os os.path sys netaddr psutil re wcmatch'
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J2_SUFFIX_DEFAULT = '.j2'
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J2_CFG_PATHS = [
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'/angie/jinja',
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'/etc/angie/jinja',
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]
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J2_CFG_EXTS = [
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'yml',
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'yaml',
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'json',
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]
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J2_SEARCH_PATH = [
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'.',
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'/etc/angie',
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]
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J2_EXT_LIST = [
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'jinja2.ext.do',
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'jinja2.ext.loopcontrols',
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]
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J2_MODULES = sorted(set(os.getenv('NGX_JINJA_MODULES', J2_MODULES_DEFAULT).split(sep=' ')))
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ME = sys.argv[0]
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J2_SUFFIX = os.getenv('NGX_JINJA_SUFFIX', J2_SUFFIX_DEFAULT)
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if J2_SUFFIX == '':
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raise ValueError('NGX_JINJA_SUFFIX is empty')
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if not J2_SUFFIX.startswith('.'):
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raise ValueError('NGX_JINJA_SUFFIX does not start with dot (".")')
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J2_CONFIG = os.getenv('NGX_JINJA_CONFIG', '')
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if (J2_CONFIG != '') and (not os.path.exists(J2_CONFIG)):
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print(f'{ME}: config does not exist, skipping: {J2_CONFIG}', file=sys.stderr)
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if len(sys.argv) < 2:
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raise ValueError('not enough arguments (needed: 2)')
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if len(sys.argv) > 3:
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raise ValueError('too many arguments (needed: 2)')
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if not sys.argv[1]:
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raise ValueError('specify input file')
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input_file = sys.argv[1]
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if not os.path.exists(input_file):
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raise ValueError('input file does not exist')
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if len(sys.argv) == 3:
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if not sys.argv[2]:
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raise ValueError('specify output file')
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output_file = sys.argv[2]
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else:
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output_file, ext = os.path.splitext(input_file)
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if ext != J2_SUFFIX:
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raise ValueError(f'input file name extension mismatch (not a "{J2_SUFFIX}")')
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if input_file == output_file:
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raise ValueError('unable to process template inplace')
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kwargs = {}
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for m in J2_MODULES:
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kwargs[m] = importlib.import_module(m)
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kwargs['env'] = os.environ
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kwargs['cfg'] = {}
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def merge_dict_from_file(filename):
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if not filename:
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return False
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if not isinstance(filename, str):
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return False
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if filename == '':
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return False
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if not os.path.exists(filename):
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return False
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if not os.path.isfile(filename):
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print(f'{ME}: not a file, skipping: {filename}', file=sys.stderr)
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return False
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if filename.endswith('.yml') or filename.endswith('.yaml'):
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with open(filename, mode='r', encoding='utf-8') as fx:
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x = yaml.safe_load(fx)
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kwargs['cfg'] = kwargs['cfg'] | x
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return True
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if filename.endswith('.json'):
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with open(filename, mode='r', encoding='utf-8') as fx:
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x = json.load(fx)
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kwargs['cfg'] = kwargs['cfg'] | x
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return True
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print(f'{ME}: non-recognized name extension: {filename}', file=sys.stderr)
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return False
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if (J2_CONFIG != '') and (os.path.isfile(J2_CONFIG)):
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merge_dict_from_file(J2_CONFIG)
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else:
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for base in J2_CFG_PATHS:
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for full in [ base + '.' + ext for ext in J2_CFG_EXTS ]:
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if merge_dict_from_file(full):
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break
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continue
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j2_loader = jinja2.FileSystemLoader(J2_SEARCH_PATH, followlinks=True)
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j2_environ = jinja2.Environment(loader=j2_loader, extensions=J2_EXT_LIST)
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j2_template = j2_environ.get_template(input_file)
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j2_stream = j2_template.stream(**kwargs)
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j2_stream.disable_buffering()
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j2_stream.dump(output_file, encoding='utf-8')
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