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from argparse import Namespace
import shutil
from cru import CruIterator
from cru.template import TemplateTree
from ._base import AppCommandFeatureProvider, AppFeaturePath
from ._config import ConfigManager
class TemplateManager(AppCommandFeatureProvider):
def __init__(self, prefix: str | None = None):
super().__init__("template-manager")
self._prefix = prefix or self.app.app_id.upper()
def setup(self) -> None:
self._templates_dir = self.app.add_path("templates", True)
self._generated_dir = self.app.add_path("generated", True)
self._template_tree: TemplateTree | None = None
@property
def prefix(self) -> str:
return self._prefix
@property
def templates_dir(self) -> AppFeaturePath:
return self._templates_dir
@property
def generated_dir(self) -> AppFeaturePath:
return self._generated_dir
@property
def template_tree(self) -> TemplateTree:
if self._template_tree is None:
return self.reload()
return self._template_tree
def reload(self) -> TemplateTree:
self._template_tree = TemplateTree(
self.prefix, self.templates_dir.full_path_str
)
return self._template_tree
def _print_file_lists(self) -> None:
for file in CruIterator(self.template_tree.templates).transform(lambda t: t[0]):
print(file.as_posix())
def _generate_files(self, dry_run: bool) -> None:
config_manager = self.app.get_feature(ConfigManager)
if not dry_run and self.generated_dir.full_path.exists():
shutil.rmtree(self.generated_dir.full_path)
self.template_tree.generate_to(
self.generated_dir.full_path_str, config_manager.get_str_dict(), dry_run
)
def get_command_info(self):
return ("template", "Manage templates.")
def setup_arg_parser(self, arg_parser):
subparsers = arg_parser.add_subparsers(
dest="template_command", required=True, metavar="TEMPLATE_COMMAND"
)
_list_parser = subparsers.add_parser("list", help="list templates")
_variables_parser = subparsers.add_parser(
"variables", help="list variables used in all templates"
)
generate_parser = subparsers.add_parser("generate", help="generate templates")
generate_parser.add_argument(
"--no-dry-run", action="store_true", help="generate and write target files"
)
def run_command(self, args: Namespace) -> None:
if args.template_command == "list":
self._print_file_lists()
elif args.template_command == "variables":
for var in self.template_tree.variables:
print(var)
elif args.template_command == "generate":
dry_run = not args.no_dry_run
self._generate_files(dry_run)
if dry_run:
print("Dry run successfully.")
print(
f"Will delete dir {self.generated_dir.full_path_str} if it exists."
)
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