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#!/usr/bin/env python3 |
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# -*- coding: utf-8 -*- |
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# NAME |
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# inji - Render jina2 templates to stdout |
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import argparse |
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import atexit |
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import fnmatch |
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import json |
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import locale |
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import os |
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from os.path import abspath, dirname, join |
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import pkg_resources |
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import re |
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from setproctitle import setproctitle |
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import shutil |
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import signal |
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import sys |
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import tempfile |
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from .engine import TemplateEngine |
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from . import utils |
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def pkg_location(): |
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return abspath(dirname(__file__)) |
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def cli_location(): |
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return abspath(join(pkg_location(), '../bin/inji')) |
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def _version(): |
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return pkg_resources.require(__package__)[0].version |
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__version__ = _version() |
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def cli_args(): |
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parser = argparse.ArgumentParser( |
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description='inji - render jinja templates' |
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) |
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required = parser.add_argument_group('required arguments') |
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required.add_argument('-t', '-f', '--template', |
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action = 'store', required=False, type=utils.file_or_stdin, |
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dest='template', default='-', |
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help='/path/to/template.j2 (defaults to -)' |
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) |
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parser.add_argument('-j', '--json-config', '-c', |
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action = 'store', required=False, |
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type=lambda x: utils.json_parse(x), |
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dest='json_string', |
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help="-c '{ \"foo\": \"bar\", \"fred\": \"wilma\" }'" |
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) |
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parser.add_argument('-k', '--kv-config', '-d', |
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action = 'store', required=False, |
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type=lambda x: utils.kv_parse(x), |
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dest='kv_pair', |
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help='-d foo=bar -d fred=wilma' |
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) |
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parser.add_argument('-o', '--overlay-dir', |
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action = 'append', required=False, type=lambda p, t='dir': utils.path(p, t), |
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dest='overlay_dir', default=[], |
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help='/path/to/overlay/' |
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) |
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parser.add_argument('-v', '-p', '--vars-file', '--vars', |
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action = 'append', required=False, type=lambda p, t='file': utils.path(p, t), |
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dest='vars_file', default=[], |
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help='/path/to/vars.yaml' |
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) |
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parser.add_argument('--strict-mode', '-s', |
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action = 'store', required=False, type=str, |
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dest='undefined_variables_mode', default='strict', |
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choices=[ 'strict', 'empty', 'keep', |
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'StrictUndefined', 'Undefined', 'DebugUndefined' ], |
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help='Refer to http://jinja.pocoo.org/docs/2.10/api/#undefined-types' |
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) |
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required.add_argument('--version', |
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action = 'version', |
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version=_version(), |
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help='print version number ({})'.format(_version()) |
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) |
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return parser.parse_args() |
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def sigint_handler(signum, frame): # pragma: no cover # despite being covered |
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""" Handle SIGINT, ctrl-c gracefully """ |
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signal.signal(signum, signal.SIG_IGN) # ignore subsequent ctrl-c's |
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sys.exit( 128 + signal.SIGINT ) # 130 by convention |
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def main(): |
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""" Our main method """ |
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# cleanly handle ctrl-c's |
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signal.signal(signal.SIGINT, sigint_handler) |
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# set process name |
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setproctitle('inji') |
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args = cli_args() |
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# this holds all the possible vars files we are told about or imply |
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vars_files = [] |
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# context in the local configuration files - p5 |
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vars_files += fnmatch.filter(os.listdir('.'), "*inji.y*ml") |
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# context in the overlay directories - p4 |
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for d in args.overlay_dir: |
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files = list(utils.recursive_iglob(d, '*.y*ml')) |
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if len(files): |
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loc = locale.getlocale() |
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locale.setlocale(locale.LC_ALL, 'C') # Using LC_ALL=C POSIX locale |
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files.sort() # We force the sort collation of files |
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locale.setlocale(locale.LC_ALL, loc) # And then reset it back |
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vars_files += files |
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# context from named vars files - p3 |
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vars_files += args.vars_file |
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# This will hold the final vars dict merged from various available sources |
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context = {} |
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for file in vars_files: |
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context.update(utils.read_context(file)) |
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# context from environment variables - p2 |
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context.update(os.environ) |
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# context at the command line (either JSON or KV type) - p1 |
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if args.json_string: |
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context.update(args.json_string) |
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if args.kv_pair: |
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context.update(args.kv_pair) |
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if args.template == '-': |
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# Template passed in via stdin. Create template as a tempfile and use it |
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# instead but since includes are possible (though not likely), we have to do |
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# this in an isolated tmpdir container to prevent inadvertent reading of |
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# includes not meant to be read. |
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tmpdir = tempfile.mkdtemp() |
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atexit.register(shutil.rmtree, tmpdir) |
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_, tmpfile = tempfile.mkstemp(prefix='stdin-', dir=tmpdir, text=True) |
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atexit.register(os.remove, tmpfile) |
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with open(tmpfile, "a+") as f: |
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f.write(sys.stdin.read()) |
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args.template = tmpfile |
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engine = TemplateEngine( undefined_variables_mode_behaviour=args.undefined_variables_mode ) |
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for block in engine.render( template=args.template, |
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context=context, |
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): |
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print(block) |
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shalomb /
inji
