What does “with context” mean when importing?

Question

I was looking for an explanation in the SaltStack docs about what “with context” means. But there are only examples of the use of context.

What is a context?

What is he doing here? And why is Debianignored in the file map.jinja? (for example, map.log_dirit seems to "jump" to the level)

# config.sls
{% from "bind/map.jinja" import map with context %}

include:
  - bind

{{ map.log_dir }}:
  file.directory:
    - user: root
    - group: {{ salt['pillar.get']('bind:config:group', map.group) }}
    - mode: 775
    - require:
      - pkg: bind

# map.jinja
{% set map = salt['grains.filter_by']({
    'Debian': {
        'pkgs': ['bind9', 'bind9utils', 'dnssec-tools'],
        'service': 'bind9',
        'config_source_dir': 'bind/files/debian',
        'zones_source_dir': 'zones',
        'config': '/etc/bind/named.conf',
        'local_config': '/etc/bind/named.conf.local',
        'key_config': '/etc/bind/named.conf.key',
        'options_config': '/etc/bind/named.conf.options',
        'default_config': '/etc/default/bind9',
        'default_zones_config': '/etc/bind/named.conf.default-zones',
        'named_directory': '/var/cache/bind/zones',
        'log_dir': '/var/log/bind9',
        'user': 'root',
        'group': 'bind',
        'mode': '644'
    },
    'RedHat': {
        'pkgs': ['bind'],
        'service': 'named',
        'config_source_dir': 'bind/files/redhat',
        'zones_source_dir': 'zones',
        'config': '/etc/named.conf',
        'local_config': '/etc/named.conf.local',
        'default_config': '/etc/sysconfig/named',
        'named_directory': '/var/named/data',
        'log_dir': '/var/log/named',
        'user': 'root',
        'group': 'named',
        'mode': '640'
    },

Answer 1

with contextis part of the jinja mechanism .

Read more about this in the jinja docs:

• import context behavior
• context API

Regarding missing debian data - is this your full map.jinja? fragment skips }, default='Debian') %}according to grains.filter_by