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Expand jinja environment #26

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merged 7 commits into from
May 3, 2024
Merged

Expand jinja environment #26

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77e1773
Add two new time filters to jinja
DavidHuber-NOAA Apr 22, 2024
cdc9751
Fix PEP8 line length.
DavidHuber-NOAA Apr 22, 2024
ae7f5ed
Add Template.substitute_structure to filters
DavidHuber-NOAA Apr 30, 2024
36fd40d
Fix template constants in jinja
DavidHuber-NOAA Apr 30, 2024
57afd64
Add template constants to environment globals; add expression stateme…
DavidHuber-NOAA May 1, 2024
86fee43
Resolve conflict in jinja.py
DavidHuber-NOAA May 3, 2024
1873fee
Remove Template references for now
DavidHuber-NOAA May 3, 2024
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14 changes: 12 additions & 2 deletions src/wxflow/jinja.py
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Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,11 @@ def get_set_env(self, loader: jinja2.BaseLoader, filters: Dict[str, callable] =
to_timedelta: convert a string to a timedelta object
add_to_datetime: add time to a datetime, return new datetime object

The Expression Statement extension "jinja2.ext.do", which enables
{% do ... %} statements. These are useful for appending to lists.
e.g. {{ bar.append(foo) }} would print "None" to the parsed jinja
template, but {% do bar.append(foo) %} would not.

Parameters
----------
loader: jinja2.BaseLoader
Expand All @@ -124,6 +129,9 @@ def get_set_env(self, loader: jinja2.BaseLoader, filters: Dict[str, callable] =
"""

env = jinja2.Environment(loader=loader, undefined=self.undefined)

env.add_extension("jinja2.ext.do")

env.filters["strftime"] = lambda dt, fmt: strftime(dt, fmt)
env.filters["to_isotime"] = lambda dt: to_isotime(dt) if not isinstance(dt, SilentUndefined) else dt
env.filters["to_fv3time"] = lambda dt: to_fv3time(dt) if not isinstance(dt, SilentUndefined) else dt
Expand All @@ -133,8 +141,10 @@ def get_set_env(self, loader: jinja2.BaseLoader, filters: Dict[str, callable] =
env.filters["to_f90bool"] = lambda bool: ".true." if bool else ".false."
env.filters['getenv'] = lambda name, default='UNDEFINED': os.environ.get(name, default)
env.filters["relpath"] = lambda pathname, start=os.curdir: os.path.relpath(pathname, start)
env.filters["add_to_datetime"] = (lambda dt, delta: add_to_datetime(dt, delta)
if not (isinstance(dt, SilentUndefined) or isinstance(delta, SilentUndefined)) else dt)
env.filters["add_to_datetime"] = (
lambda dt, delta: add_to_datetime(dt, delta)
if not (isinstance(dt, SilentUndefined) or isinstance(delta, SilentUndefined))
else dt if isinstance(dt, SilentUndefined) else delta)
env.filters["to_timedelta"] = lambda delta_str: to_timedelta(delta_str) if not isinstance(delta_str, SilentUndefined) else delta_str

# Add any additional filters
Expand Down