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#!/usr/bin/env python3 |
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# -*- coding: utf-8 -*- |
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# hold global variables and functions for direct use in templates |
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# https://jinja.palletsprojects.com/en/2.11.x/api/#the-global-namespace |
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# https://jinja.palletsprojects.com/en/2.11.x/templates/#list-of-global-functions |
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from datetime import datetime, timezone |
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import inspect |
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import markdown as _markdown |
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import platform as _platform |
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import socket |
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import sys |
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from . import utils |
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def _os_release(k=None): |
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ret = {} |
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for line in open('/etc/os-release').read().strip().split('\n'): |
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k,v = line.split('=', 1) |
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ret[k] = v.strip('"') |
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return ret |
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""" |
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_globals contains the dictionary of functions (implemented as lambda functions) |
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or variables (regular values) that are accessible inside template expressions. |
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""" |
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_globals = dict( |
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date = ( """ Return the timestamp for datetime.now() """, |
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datetime.now() # variable |
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), |
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host_id = ( """ Return the host's ID """, |
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lambda : _cmd('hostid') |
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), |
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fqdn = ( """ Return the current host's fqdn """, |
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lambda : socket.getfqdn() |
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), |
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hostname = ( """ Return the current host's name """, |
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lambda : socket.gethostname() |
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), |
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machine_id = ( """ Return the machine's ID """, |
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lambda : open('/etc/machine-id').read().strip() |
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), |
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markdown = ( """ Load content from a markdown file and convert it to html """, |
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lambda f, |
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output_format='html5', |
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extensions=[ |
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'admonition', |
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'extra', |
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'meta', |
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'sane_lists', |
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'smarty', |
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'toc', |
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'wikilinks', |
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'wikilinks', |
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], |
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extension_configs = { |
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'codehilite': { |
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'linenums': True, |
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'guess_lang': False, |
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} |
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} |
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: _markdown.markdown( |
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utils.load_file(f), |
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extensions=extensions, |
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output_format=output_format |
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) |
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), |
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now = ( """ Return the timestamp for datetime.now() """, |
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lambda : datetime.now() |
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), |
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os = ( """ Dictionary holding the contents of /etc/os-release """, |
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_os_release() |
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), |
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os_release = ( """ Lookup key in /etc/os-release and return its value """, |
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lambda k: _os_release()[k] |
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), |
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platform = ( """ Access functions in the platform module """, |
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dict(set(inspect.getmembers(_platform, inspect.isfunction))) |
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), |
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run = ( |
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""" |
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Run a command and return its STDOUT |
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e.g. hello {{ run('id -un') }} |
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""", |
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lambda v: utils.cmd(v) |
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), |
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) |
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for k,v in _globals.items(): |
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setattr(sys.modules[__name__], k, v[1]) |
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shalomb /
inji
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