Pass facts variable into templates mapping to pyinfra.facts.

This allows templates to use the new `host.get_fact` explicit import
style for fact data.

Author: Fizzadar

examples/templates/foo.j2

@@ -1,14 +1,13 @@
-This file was last modified by pyinfra on {{ host.fact.date }}
+This file was last modified by pyinfra on {{ host.get_fact(facts.server.Date) }}
 
 You can use a variable from the deploy
 foo_variable contents is:{{ foo_variable }}
 
 Example host templating values:
-hostname: {{ host.fact.hostname }}
-os: {{ host.fact.os }}
-arch: {{ host.fact.arch }}
-cpus: {{ host.fact.cpus }}
-os_version: {{ host.fact.os_version }}
-
-deb_packages: {{ host.fact.deb_packages|join(', ') }}
+hostname: {{ host.get_fact(facts.server.Hostname) }}
+os: {{ host.get_fact(facts.server.Os) }}
+arch: {{ host.get_fact(facts.server.Arch) }}
+cpus: {{ host.get_fact(facts.hardware.Cpus) }}
+os_version: {{ host.get_fact(facts.server.OsVersion) }}
 
+deb_packages: {{ host.get_fact(facts.deb.DebPackages)|join(', ') }}

pyinfra/operations/files.py

@@ -7,15 +7,14 @@
 import posixpath
 import sys
 import traceback
-
 from datetime import timedelta
 from fnmatch import fnmatch
 from os import makedirs, path as os_path, walk
 
 import six
-
 from jinja2 import TemplateRuntimeError, TemplateSyntaxError, UndefinedError
 
+import pyinfra
 from pyinfra import logger
 from pyinfra.api import (
     FileDownloadCommand,
@@ -901,6 +900,7 @@ def template(
     data.setdefault('host', host)
     data.setdefault('state', state)
     data.setdefault('inventory', state.inventory)
+    data.setdefault('facts', pyinfra.facts)
 
     # Render and make file-like it's output
     try: