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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import os
import shlex
import subprocess
import yaml
class PresetHandler:
def __init__(self, path):
self.path = path
self._presets = {}
@property
def presets(self):
if not self._presets and os.path.isfile(self.path):
with open(self.path) as fh:
self._presets = yaml.safe_load(fh) or {}
return self._presets
def __contains__(self, name):
return name in self.presets
def __getitem__(self, name):
return self.presets[name]
def __len__(self):
return len(self.presets)
def __str__(self):
if not self.presets:
return ""
return yaml.safe_dump(self.presets, default_flow_style=False)
def list(self):
if not self.presets:
print("no presets found")
else:
print(self)
def edit(self):
if "EDITOR" not in os.environ:
print(
"error: must set the $EDITOR environment variable to use --edit-presets"
)
return
subprocess.call(shlex.split(os.environ["EDITOR"]) + [self.path])
def save(self, name, **data):
self.presets[name] = data
with open(self.path, "w") as fh:
fh.write(str(self))
class MergedHandler:
def __init__(self, *paths):
"""Helper class for dealing with multiple preset files."""
self.handlers = [PresetHandler(p) for p in paths]
def __contains__(self, name):
return any(name in handler for handler in self.handlers)
def __getitem__(self, name):
for handler in self.handlers:
if name in handler:
return handler[name]
raise KeyError(name)
def __len__(self):
return sum(len(h) for h in self.handlers)
def __str__(self):
all_presets = {
k: v for handler in self.handlers for k, v in handler.presets.items()
}
return yaml.safe_dump(all_presets, default_flow_style=False)
def list(self):
if len(self) == 0:
print("no presets found")
return
for handler in self.handlers:
val = str(handler)
if val:
val = "\n ".join(
[""] + val.splitlines() + [""]
) # indent all lines by 2 spaces
print("Presets from {}:".format(handler.path))
print(val)
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