diff options
Diffstat (limited to 'python/vyos/template.py')
| -rw-r--r-- | python/vyos/template.py | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/python/vyos/template.py b/python/vyos/template.py index e4b253ed3..d9b0c749d 100644 --- a/python/vyos/template.py +++ b/python/vyos/template.py @@ -17,11 +17,9 @@ import os from jinja2 import Environment from jinja2 import FileSystemLoader - from vyos.defaults import directories from vyos.util import chmod, chown, makedir - # reuse the same Environment to improve performance _templates_env = { False: Environment(loader=FileSystemLoader(directories['templates'])), @@ -32,6 +30,21 @@ _templates_mem = { True: {}, } +def vyos_address_from_cidr(text): + """ Take an IPv4/IPv6 CIDR prefix and convert the network to an "address". + Example: + 192.0.2.0/24 -> 192.0.2.0, 2001:db8::/48 -> 2001:db8:: + """ + from ipaddress import ip_network + return ip_network(text).network_address + +def vyos_netmask_from_cidr(text): + """ Take an IPv4/IPv6 CIDR prefix and convert the prefix length to a "subnet mask". + Example: + 192.0.2.0/24 -> 255.255.255.0, 2001:db8::/48 -> ffff:ffff:ffff:: + """ + from ipaddress import ip_network + return ip_network(text).netmask def render(destination, template, content, trim_blocks=False, formater=None, permission=None, user=None, group=None): """ @@ -42,8 +55,8 @@ def render(destination, template, content, trim_blocks=False, formater=None, per This classes cache the renderer, so rendering the same file multiple time does not cause as too much overhead. If use everywhere, it could be changed - and load the template from python environement variables from an import - python module generated when the debian package is build + and load the template from python environement variables from an import + python module generated when the debian package is build (recovering the load time and overhead caused by having the file out of the code) """ @@ -54,11 +67,15 @@ def render(destination, template, content, trim_blocks=False, formater=None, per # Setup a renderer for the given template # This is cached and re-used for performance if template not in _templates_mem[trim_blocks]: - _templates_mem[trim_blocks][template] = _templates_env[trim_blocks].get_template(template) + _env = _templates_env[trim_blocks] + _env.filters['address_from_cidr'] = vyos_address_from_cidr + _env.filters['netmask_from_cidr'] = vyos_netmask_from_cidr + _templates_mem[trim_blocks][template] = _env.get_template(template) + template = _templates_mem[trim_blocks][template] # As we are opening the file with 'w', we are performing the rendering - # before calling open() to not accidentally erase the file if the + # before calling open() to not accidentally erase the file if the # templating fails content = template.render(content) |